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中海油服:中海油服H股公告-于2029年到期之5,000,000,000人民币1.95厘利率有担保票据刊发发售通函

上海证券交易所 03-17 00:00 查看全文

香港交易及結算所有限公司及香港聯合交易所有限公司對本公告的內容概不負責,對其準確性或完整性亦不發表任何聲明,並明確表示,概不對因本公告全部或任何部分內容而產生或因依賴該等內容而引致的任何損失承擔任何責任。

本公告僅供參考用途,並不構成收購、購買或認購證券的邀請或要約。本公告僅供參考用途,並不構成於美國或該等要約、游說或銷售根據任何其他司法權區證券法登記或符合資格前即屬違法的任何該等司法權區購買或認購證券的要約或游說或組成其一部分。

該證券並無且將不會根據一九三三年美國證券法(經修訂)(「證券法」)或美國任何州或任

何其他司法權區的證券法登記,除根據證券法登記規定獲豁免登記或不受美國證券法登記規定規限的交易外,並且概不得在美國境內發售或出售。本公告及其所載資料不會直接或間接在或向美國派發。概無本公告所提述證券正在或將在美國公開發售。

刊發本公告及當中所述上市文件乃根據香港聯合交易所有限公司(「香港聯交所」)證券上

市規則(「上市規則」)的規定僅供參考,並非構成出售任何證券的要約或招攬購買任何證券的要約。本公告及當中任何文件(包括上市文件)概不構成任何合約或承諾的依據。為免生疑問,刊發本公告及當中所述的上市文件,就香港法例第32章公司(清盤及雜項條文)條例而言,不應被視作根據發行人或擔保人(各自定義見下文)或代表發行人或擔保人所刊發的招股章程而作出的證券要約,以及就香港法例第571章證券及期貨條例而言,亦不構成載有邀請公眾訂立或要約訂立協議以取得、處置、認購或包銷證券的廣告、邀請或文件。

致香港投資者之通告:發行人及擔保人確認,票據(定義見下文)擬定僅供專業投資者(定義見上市規則第37章)(「專業投資者」)購買並已按此基礎於香港聯交所上市。因此,發行人及擔保人確認,票據並不適合香港零售投資者投資。投資者應審慎考慮所涉及的風險。

-1-刊發發售通函

COSL SINGAPORE CAPITAL LTD.(於新加坡註冊成立的有限公司)(「發行人」)

於2029年到期之5000000000人民幣1.95厘利率有擔保票據(「票據」,證券代號:85112)由

CHINA OILFIELD SERVICES LIMITED(中海油田服務股份有限公司)(於中華人民共和國註冊成立的股份有限公司)(股份代號:2883)(「擔保人」)提供無條件及不可撤回地擔保

聯席全球協調人、聯席承銷商及聯席賬簿管理人中銀國際中信証券摩根大通聯席賬簿管理人

農銀國際中國農業銀行股份有限公司中國銀行(香港)香港分行

交通銀行中國建設銀行(亞洲)興證國際中金公司中信建投國際花旗

招銀國際招商永隆銀行有限高盛(亞洲)工銀國際公司有限責任公司

本公告乃根據上市規則第37.39A條刊發。

-2-請參閱本公告隨附日期為2026年3月9日的發售通函(「發售通函」),內容有關票據發行。發售通函僅以英文版本刊發,概無刊發發售通函的中文版本。誠如發售通函所披露,票據擬定僅供專業投資者購買,並已按此基礎於香港聯交所上市。

致香港投資者之通告:發行人及擔保人確認,票據擬定僅供專業投資者購買並已按此基礎於香港聯交所上市。因此,發行人及擔保人確認,票據並不適合香港零售投資者投資。投資者應審慎考慮所涉及的風險。

發售通函並不構成向任何司法權區的公眾人士提呈出售任何證券的招股章程、

通告、通函、宣傳冊或廣告,且並非向公眾人士發出邀請以就認購或購買任何證券作出要約,亦非供傳閱以邀請公眾人士就認購或購買任何證券的要約。

發售通函不應被視為認購或購買發行人或擔保人任何證券的勸誘,且並無意進行有關勸誘。

香港,2026年3月17日於本公告日期,擔保人執行董事為趙順強先生(董事長)及盧濤先生;擔保人職工代表董事為肖佳先生;擔保人非執行董事為范白濤先生及劉秋東先生;擔保

人獨立非執行董事為趙麗娟女士、郭琳廣先生及姚昕先生。

於本公告日期,發行人的董事為陳一然先生、王倩女士及張琰先生。

- 3 -IMPORTANT NOTICES

THIS OFFERING IS AVAILABLE ONLY TO INVESTORS WHO ARE ADDRESSEES OUTSIDE OF THE UNITED STATES.You must read the following disclaimer before continuing. The following disclaimer applies to the attached offering circular. You are therefore

advised to read this disclaimer carefully before reading accessing or making any other use of the attached offering circular. In accessing the

attached offering circular you agree to be bound by the following terms and conditions including any modifications to them any time you

receive any information from us as a result of such access.NOTHING IN THIS ELECTRONIC TRANSMISSION CONSTITUTES AN OFFER OF SECURITIES FOR SALE IN ANY JURISDICTION

WHERE IT IS UNLAWFUL TO DO SO. THE SECURITIES REFERRED TO IN THE ATTACHED OFFERING CIRCULAR HAVE NOT

BEEN AND WILL NOT BE REGISTERED UNDER THE UNITED STATES SECURITIES ACT OF 1933 AS AMENDED (THE

“SECURITIES ACT”) OR THE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES OR OTHER JURISDICTION AND THE

SECURITIES MAY NOT BE OFFERED SOLD OR OTHERWISE TRANSFERRED WITHIN THE UNITED STATES EXCEPT PURSUANT

TO AN EXEMPTION FROM OR IN A TRANSACTION NOT SUBJECT TO THE REGISTRATION REQUIREMENTS OF THE

SECURITIES ACT AND APPLICABLE STATE OR LOCAL SECURITIES LAWS.THE ATTACHED OFFERING CIRCULAR MAY NOT BE FORWARDED OR DISTRIBUTED TO ANY OTHER PERSON AND MAY NOT

BE REPRODUCED IN ANY MANNER WHATSOEVER. ANY FORWARDING DISTRIBUTION OR REPRODUCTION OF THIS

DOCUMENT IN WHOLE OR IN PART IS UNAUTHORISED. FAILURE TO COMPLY WITH THIS DIRECTIVE MAY RESULT IN A

VIOLATION OF THE SECURITIES ACT OR THE APPLICABLE LAWS OF OTHER JURISDICTIONS. IF YOU HAVE GAINED ACCESS

TO THIS TRANSMISSION CONTRARY TO ANY OF THE FOREGOING RESTRICTIONS YOU ARE NOT AUTHORISED AND WILL

NOT BE ABLE TO PURCHASE ANY OF THE SECURITIES DESCRIBED THEREIN.The attached offering circular is not a prospectus for the purposes of Regulation (EU) 2017/1129 as amended.Prohibition of Sales to EEA Retail Investors – The Notes (as defined in the attached offering circular) are not intended to be offered sold or

otherwise made available to and should not be offered sold or otherwise made available to any retail investor in the European Economic Area

(the “EEA”). For these purposes a “retail investor” means a person who is one (or both) of: (i) a retail client as defined in point (11) of Article

4(1) of Directive 2014/65/EU as amended (“MiFID II”); or (ii) a customer within the meaning of Directive (EU) 2016/97 as amended where

that customer would not qualify as a professional client as defined in point (10) of Article 4(1) of MiFID II. Consequently no key information

document required by Regulation (EU) No 1286/2014 as amended (the “PRIIPs Regulation”) for offering or selling the Notes or otherwise

making them available to retail investors in the EEA has been prepared and therefore offering or selling the Notes or otherwise making them

available to any retail investor in the EEA may be unlawful under the PRIIPs Regulation.Prohibition of Sales to United Kingdom Retail Investors – The Notes are not intended to be offered sold or otherwise made available to and

should not be offered sold or otherwise made available to any retail investor in the United Kingdom. For these purposes a “retail investor”

means a person who is not a professional client as defined in point (8) of Article 2(1) of Regulation (EU) No 600/2014 as it forms part of

domestic law in the United Kingdom (“UK MiFIR”). Consequently no key information document required by Regulation (EU) No 1286/2014 as

it forms part of domestic law in the United Kingdom (the “UK PRIIPs Regulation”) for offering or selling the Notes or otherwise making them

available to retail investors in the United Kingdom has been prepared and therefore offering or selling the Notes or otherwise making them

available to any retail investor in the United Kingdom may be unlawful under the UK PRIIPs Regulation.Notification under Section 309B of the Securities and Futures Act (Chapter 289) of Singapore as modified or amended from time to time (the

“SFA”) – Solely in connection with its obligations under Section 309B of the SFA and the Securities and Futures (Capital Markets Products)

Regulations 2018 of Singapore (the “CMP Regulations 2018”) the Issuer has determined and hereby notifies all relevant persons (as defined in

Section 309A(1) of the SFA) of the classification of the Notes as “prescribed capital markets products” (as defined in the CMP Regulations

2018) and Excluded Investment Products (as defined in MAS Notice SFA 04-N12: Notice on the Sale of Investment Products and MAS Notice

FAA-N16: Notice on Recommendations on Investment Products). The communication of the attached offering circular and any other document

or materials relating to the issue of the Notes offered hereby is not being made and the attached offering circular and such documents and/or

materials have not been approved by an authorised person for the purposes of section 21 of the United Kingdom’s Financial Services and

Markets Act 2000 as amended. Accordingly the attached offering circular and such documents and/or materials are not being distributed to and

must not be passed on to the general public in the United Kingdom. The attached offering circular and such other documents and/or materials

are for distribution only to persons who (i) have professional experience in matters relating to investments and who fall within the definition of

investment professionals (as defined in Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005 as

amended (the “Financial Promotion Order”)) (ii) fall within Article 49(2)(a) to (d) of the Financial Promotion Order (iii) are outside the United

Kingdom or (iv) are other persons to whom it may otherwise lawfully be communicated or distributed under the Financial Promotion Order (all

such persons together being referred to as “relevant persons”). The attached offering circular and any such other documents and/or materials are

directed only at relevant persons and must not be acted on or relied on by persons who are not relevant persons. Any investment or investment

activity to which the attached offering circular and any such other documents and/or materials relate will be engaged in only with relevant

persons. Any person in the United Kingdom that is not a relevant person should not act or rely on the attached offering circular or any other

documents and/or materials relating to the issue of the Notes offered hereby or any of their contents.Confirmation and your representation: In order to be eligible to view the attached offering circular or make an investment decision with respect

to the Notes investors must be outside the United States. By accepting the e-mail and accessing this offering circular you shall be deemed to

have represented to us that (1) you and any customers you represent are outside the United States and that the electronic mail address that you

gave us and to which this e-mail has been delivered is not located in the United States and (2) that you consent to delivery of such offering

circular by electronic transmission.You are reminded that the attached offering circular has been delivered to you on the basis that you are a person into whose possession the

attached offering circular may be lawfully delivered in accordance with the laws of the jurisdiction in which you are located and you may not

nor are you authorised to deliver this document electronically or otherwise or disclose the contents of the offering circular to any other person.The materials relating to the offering contemplated under the attached offering circular do not constitute and may not be used in connection

with an offer or solicitation in any place where offers or solicitations are not permitted by law. This offering circular has been sent to you in an

electronic form. You are reminded that documents transmitted via this medium may be altered or changed during the process of electronic

transmission and consequently none of COSL Singapore Capital Ltd. China Oilfield Services Limited (中海油田服務股份有限公司) none of

BOCI Asia Limited CLSA Singapore Pte Ltd J.P. Morgan Securities Asia Private Limited ABCI Capital Limited Agricultural Bank of China

Limited Hong Kong Branch Bank of China (Hong Kong) Limited Bank of Communications Co. Ltd. Hong Kong Branch China Construction

Bank (Asia) Corporation Limited China Industrial Securities International Brokerage Limited China International Capital Corporation Hong

Kong Securities Limited China Securities (International) Corporate Finance Company Limited Citigroup Global Markets Limited CMBInternational Capital Limited CMB Wing Lung Bank Limited Goldman Sachs (Asia) L.L.C. ICBC International Securities Limited (the “InitialPurchasers”) or any person who controls any of them or any director officer employee or agent of any of them or affiliate of any such person

accepts any liability or responsibility whatsoever in respect of any difference between the offering circular distributed to you in electronic format

and the hard copy version available to you upon request.You are responsible for protecting against viruses and other destructive items. Your use of this e-mail is at your own risk and it is your

responsibility to take precautions to ensure that it is free from viruses and other items of a destructive nature.COSL Singapore Capital Ltd.(incorporated in Singapore with limited liability) (UEN/Company Registration No. 200920232R)

CNY5000000000 1.95% Guaranteed Notes due 2029

unconditionally and irrevocably guaranteed by

China Oilfield Services Limited

(中海油田服務股份有限公司)

(incorporated with limited liability in the People’s Republic of China)

Issue Price: 100.00%

COSL Singapore Capital Ltd. (the “Issuer”) is offering 1.95% Guaranteed Notes due 2029 in the aggregate principal amount of CNY5000000000 (the “Notes”). The

Notes will mature on 16 March 2029 and will bear interest at 1.95% per annum payable semi-annually in arrear on 16 March and 16 September of each year

commencing on 16 September 2026.The Notes are direct unconditional unsubordinated and unsecured obligations of the Issuer unconditionally and irrevocably guaranteed by China Oilfield Services

Limited (中海油田服務股份有限公司 ) (“COSL” the “Company” or the “Guarantor”). The Notes will at all times rank pari passu will all other unsecured and

unsubordinated obligations of the Issuer save for such obligations as may be preferred by provisions of law that are both mandatory and of general application and

subject to Condition 4(a). The Company’s guarantee of the Notes is referred to as the “Guarantee” and is contained in the deed of guarantee executed by the Guarantor

governing the Guarantee (the “Deed of Guarantee”). The Guarantee constitutes direct unconditional unsubordinated and (subject to Condition 4(a)) unsecured

obligations of the Guarantor which will at all times rank at least pari passu with all other unsecured and unsubordinated obligations of the Guarantor save for such

obligations as may be preferred by provisions of law that are both mandatory and of general application and subject to Condition 4(a).At any time and from time to time prior to 16 February 2029 we may at our option redeem the Notes in whole or in part at a redemption price equal to the Make

Whole Price (as defined in the trust deed governing the Notes (the “Trust Deed”)) as at and accrued and unpaid interest if any to (but not including) the redemption

date. Upon the occurrence of a Change of Control (as defined in the Trust Deed) we must make an offer to repurchase all Notes outstanding at a purchase price equal

to 101% of their principal amount plus accrued and unpaid interest if any to the date of repurchase. The Issuer may at any time after 16 February 2029 redeem the

Notes in whole or in part at 100 per cent. of their principal amount together with interest (if any) accrued to but excluding the redemption date. In addition upon

the occurrence of a No Registration Event (as defined in the Trust Deed) the Noteholder of any Note will have the right at such Noteholder’s option to require the

Issuer to redeem all but not part of that Noteholder’s Notes on the redemption date at their principal amount together with interest (if any) accrued to but excluding

the redemption date.For a more detailed description of the Notes see the section entitled “Terms and Conditions of the Notes” beginning on page 88.Investing in the Notes involves significant risks. See “Risk Factors” beginning on page 10 for a discussion of factors that you should consider carefully before

investing in the Notes.Application will be made to The Stock Exchange of Hong Kong Limited (the “Hong Kong Stock Exchange”) for the listing of and permission to deal in the Notes by

way of debt issues to professional investors (as defined in Chapter 37 of the Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong Limited)

(“Professional Investors”) only. This Offering Circular is for distribution to Professional Investors only.Notice to Hong Kong investors: The Issuer confirms that the Notes are intended for purchase by Professional Investors only and will be listed on the Hong

Kong Stock Exchange on that basis. Accordingly the Issuer confirms that the Notes are not appropriate as an investment for retail investors in Hong Kong.Investors should carefully consider the risks involved.The Hong Kong Stock Exchange has not reviewed the contents of this Offering Circular other than to ensure that the prescribed form disclaimer and

responsibility statements and a statement limiting distribution of this Offering Circular to Professional Investors only have been reproduced in this Offering

Circular. Listing of the Notes on the Hong Kong Stock Exchange is not to be taken as an indication of the commercial merits or credit quality of the Notes

the Issuer the Company or the Group (as defined below) or the quality of disclosure in this Offering Circular. Hong Kong Exchanges and Clearing Limited

and the Hong Kong Stock Exchange take no responsibility for the contents of this Offering Circular make no representation as to its accuracy or

completeness and expressly disclaim any liability whatsoever for any loss howsoever arising from or in reliance upon the whole or any part of the contents of

this Offering Circular.With reference to the Administrative Measures for the Examination and Registration of Medium and Long-term Foreign Debts of Enterprises (NDRC Order No. 56)

(企業中長期外債審核登記管理辦法(國家發展和改革委員會令第56號)) (the “NDRC Measures”) promulgated by National Development and Reform Commission of

the PRC (the “NDRC”) on 5 January 2023 and became effective on 10 February 2023 we have made an application for the pre-issuance registration of the issuance of

the Notes with the NDRC and obtained a Certificate of Examination and Registration of Foreign Debts Borrowed by Enterprises (企業借用外債審核登記證明) from

the NDRC dated 6 February 2026 evidencing such registration. We undertake to file with the NDRC the requisite information and documents in relation to the Notes

within the relevant prescribed timeframe after the Issue Date in accordance with the NDRC Measures and any implementation rules as issued by the NDRC from time

to time including but not limited to the filing with the NDRC the offering information and the issue details of the Notes within the prescribed time period prescribed

by the NDRC after the Issue Date and we shall comply with all applicable PRC laws and regulations in connection with the Notes (including but not limited to any

related filing requirement under the NDRC Measures).The Guarantor is required to register with the State Administration of Foreign Exchange or its local counterparts (the “SAFE”) the Guarantee within 15 working days

after the execution of the Guarantee in accordance with the Provisions on the Foreign Exchange Administration of Cross-Border Guarantees (跨境擔保外匯管理規定)

promulgated by SAFE on 12 May 2014 which came into effect on 1 June 2014.The Notes are expected to be rated “A3” by Moody’s Investors Service Inc. (“Moody’s”) and “A-” by Fitch Ratings Ltd. (“Fitch”). Such ratings of the Notes do not

constitute any recommendation to buy sell or hold the Notes and may be subject to revision or withdrawal at any time by Moody’s or Fitch. Such ratings should be

evaluated independently of any other rating of the other securities of the Issuer or the Company.The Notes and the Guarantee have not been and will not be registered under the United States Securities Act of 1933 as amended (the “Securities Act”) or the

securities laws of any state of the United States and may not be offered or sold within the United States except pursuant to an exemption from or in a transaction not

subject to the registration requirements of the Securities Act. Accordingly the Notes and the Guarantee are being offered and sold only outside the United States in

offshore transactions in reliance on Regulation S under the Securities Act.The Notes will be represented by a global registered bond certificate (the “Global Certificate”) substantially in the form scheduled to the Trust Deed. The Global

Certificate will be registered in the name of and lodged with a sub-custodian for the Hong Kong Monetary Authority as operator (the “CMU Operator”) of the Central

Moneymarkets Unit Service (the “CMU” or the “Clearing System”) and will be exchangeable for definitive certificates (the “Definitive Certificates”) only in the

circumstances set out therein. Except as described in the Global Certificate Definitive Certificates for the Notes will not be issued in exchange for interests in the

Global Certificate. For persons seeking to hold a beneficial interest in the Notes through Euroclear Bank SA/NV (“Euroclear”) or Clearstream Banking S.A.(“Clearstream Luxembourg”) such persons will hold their interest through an account opened and held by Euroclear or Clearstream Luxembourg (as the case may be)

with the CMU Operator.Joint Lead Managers and Joint Global Coordinators

BOC International CITIC Securities J.P. Morgan

Joint Bookrunners

ABC International Agricultural Bank of China Bank of China (Hong Kong)

Limited Hong Kong Branch

Bank of Communications China Construction Bank (Asia) China Industrial Securities International

China International Capital Corporation China Securities International Citigroup

CMB International CMB Wing Lung Bank Limited- 5 - Goldman Sachs (Asia) L.L.C. ICBC International

The date of this Offering Circular is 9 March 2026.NOTICE TO INVESTORS

This offering circular has been prepared by the Issuer and the Company solely for use in connection with the

proposed offering of the Notes. Each of the Issuer and the Company and each of BOCI Asia Limited CLSA

Singapore Pte Ltd J.P. Morgan Securities Asia Private Limited ABCI Capital Limited Agricultural Bank of

China Limited Hong Kong Branch Bank of China (Hong Kong) Limited Bank of Communications Co.Ltd. Hong Kong Branch China Construction Bank (Asia) Corporation Limited China Industrial Securities

International Brokerage Limited China International Capital Corporation Hong Kong Securities Limited

China Securities (International) Corporate Finance Company Limited Citigroup Global Markets Limited

CMB International Capital Limited CMB Wing Lung Bank Limited Goldman Sachs (Asia) L.L.C. and

ICBC International Securities Limited (the “Initial Purchasers”) reserves the right to withdraw the offering

of the Notes at any time or to reject any offer to purchase in whole or in part for any reason or to sell less

than all of the Notes placed hereby.This offering circular is personal to the prospective investor to whom it has been delivered by the Initial

Purchasers and does not constitute an offer to any other person or to the public in general to subscribe for or

otherwise acquire the Notes. Distribution of this offering circular to any person other than the prospective

investor and those persons if any retained to advise that prospective investor with respect thereto is

unauthorised and any disclosure of its contents without the Issuer’s prior written consent is prohibited. The

prospective investor by accepting delivery of this offering circular agrees to the foregoing and agrees not to

make any photocopies of this offering circular.This offering circular is intended solely for the purpose of soliciting indications of interest in the Notes from

qualified investors and does not purport to summarise all of the terms conditions covenants and other

provisions contained in the Trust Deed and other transaction documents described herein. The information

provided is not all-inclusive. The market information in this offering circular has been obtained by the Issuer

or the Company from publicly available sources deemed by it to be reliable. The Initial Purchasers and their

affiliates directors officers employees advisors representatives agents or any person who controls any of

them do not accept any liability in relation to the information contained in this offering circular or its

distribution or with regard to any other information supplied by or on the Issuer’s or the Company’s behalf.This offering circular may only be used where it is legal to sell the Notes.None of the Initial Purchasers Citicorp International Limited as trustee (the “Trustee”) CiticorpInternational Limited as CMU lodging and paying agent registrar and transfer agent (the “CMU Lodgingand Paying Agent” the “Registrar” and “Transfer Agent” respectively and together the “Agents”) or any

of their respective affiliates directors officers employees advisors representatives agents or any person

who controls any of them have separately verified the information contained herein. Accordingly no

representation warranty or undertaking express or implied is made or given and no responsibility is

accepted by any of the Initial Purchasers the Trustee or the Agents or any of their respective affiliates

directors officers employees advisors representatives agents or any person who controls any of them. The

information in this document may only be accurate at the date of this offering circular. Neither the delivery

of this offering circular nor any sale made hereunder shall under any circumstances imply that there has

been no change or development in the Company’s or the Issuer’s affairs and those of each of their respective

subsidiaries or that the information set forth herein is correct as at any date subsequent to the date hereof.Investors hereby acknowledge that (i) they have not relied on the Initial Purchasers the Trustee the Agents

or any person affiliated with the Initial Purchasers the Trustee or the Agents in connection with any

investigation of the accuracy of such information or their investment decision and have conducted their own

investigation with respect to the Company and the Notes; (ii) they have received all information that they

believe is necessary or appropriate in connection with its purchase of the Notes; (iii) no person has been

authorised to give any information or to make any representation concerning the Issuer the Company the

–– i ––Notes or the Guarantee (other than as contained herein and information given by the Issuer’s or the

Company’s duly authorised officers and employees as applicable in connection with investors’ examination

of the Issuer and the Company and the terms of this offering) and if given or made any such other

information or representation should not be relied upon as having been authorised by the Issuer the

Company the Initial Purchasers the Trustee or the Agents; (iv) they have consulted their own independent

advisors or otherwise have satisfied themselves concerning without limitation the tax legal currency and

other economic considerations related to the investment in the Notes and have only relied on the advice of

or have only consulted with such independent advisers; (v) they have such knowledge and experience in

financial and business matters and in participating in transactions such as the offering contemplated herein

that they are capable of evaluating the merits and risks of the prospective investment in the Notes; (vi) they

will not look to the Initial Purchasers the Trustee the Agents or any of their affiliates or their affiliates’

officers directors employees or agents in respect of any such loss arising from their investments in the

Notes; and (vii) they have authorised the Initial Purchasers the Trustee and the Agents to rely upon the truth

and accuracy of the abovementioned acknowledgments and undertakings. None of the Initial Purchasers the

Trustee or any Agent undertakes to review the financial condition or affairs of the Issuer or the Company

during the life of the arrangements contemplated by this offering circular nor to advise any investor or

prospective investor in the Notes of any information coming to the attention of the Initial Purchasers the

Trustee or any Agent.In making an investment decision prospective investors must rely on their examination of the Issuer and the

Company and the terms of this offering including the merits and risks involved.This offering circular does not constitute an offer to sell or a solicitation of an offer to buy any of the

Notes and may not be used for the purpose of an offer to or a solicitation by any person in any jurisdiction

in which it is unlawful for such person to make such offer or solicitation.IN CONNECTION WITH THIS OFFERING ANY OF THE INITIAL PURCHASERS APPOINTED ASAND ACTING IN ITS CAPACITY AS THE STABILISATION MANAGER (THE “STABILISATIONMANAGER”) OR ANY PERSON ACTING FOR IT MAY PURCHASE AND SELL THE NOTES IN

THE OPEN MARKET. THESE TRANSACTIONS MAY TO THE EXTENT PERMITTED BY

APPLICABLE LAWS AND REGULATIONS INCLUDE SHORT SALES STABILISING

TRANSACTIONS AND PURCHASES TO COVER POSITIONS CREATED BY SHORT SALES.THESE ACTIVITIES MAY STABILISE MAINTAIN OR OTHERWISE AFFECT THE MARKET

PRICE OF THE NOTES. IN SO DOING THE STABILISATION MANAGER OR ANY PERSON

ACTING ON BEHALF OF THE STABILISATION MANAGER SHALL ACT AS PRINCIPAL AND NOT

AS AGENT OF THE ISSUER OR THE COMPANY. HOWEVER THE STABILISATION MANAGER

OR ANYONE ACTING FOR IT IS NOT OBLIGATED TO DO THIS. IF THESE ACTIONS ARE

COMMENCED THEY SHALL BE UNDERTAKEN IN ACCORDANCE WITH APPLICABLE LAWS

AND REGULATIONS AND AS A RESULT THEREOF THE PRICE OF THE NOTES MAY BE HIGHER

THAN THE PRICE THAT OTHERWISE MIGHT EXIST IN THE OPEN MARKET. ANY

STABILISATION ACTION MAY BEGIN ON OR AFTER THE DATE ON WHICH ADEQUATE

PUBLIC DISCLOSURE OF THE TERMS OF THE NOTES IS MADE AND IF BEGUN MAY BE

ENDED AT ANY TIME AND MUST END NO LATER THAN THE EARLIER OF 30 DAYS AFTER

THE ISSUE DATE OF THE NOTES AND 60 DAYS AFTER THE DATE OF THE ALLOTMENT OF

THE NOTES. ANY LOSS OR PROFIT SUSTAINED AS A CONSEQUENCE OF ANY SUCH

TRANSACTIONS OR STABILISATION SHALL BE FOR THE ACCOUNT OF THE STABILISATION

MANAGER.None of the Issuer the Guarantor the Initial Purchasers the Trustee the Agents or any of its or their

respective affiliates directors officers employees advisors representatives agents or any person who

controls any of them is making any representation to any offeree or purchaser of the Notes placed hereby

regarding the legality of any investment by such offeree or purchaser under applicable legal investment or

–– ii ––similar laws. Each prospective investor should consult with its own advisers as to legal tax business

financial and related aspects of a purchase of the Notes. None of the Initial Purchasers the Trustee or the

Agents makes any representation warranty or undertaking express or implied or accepts any responsibility

with respect to the accuracy or completeness of any of the information in this offering circular. To the fullest

extent permitted by law none of the Initial Purchasers the Trustee or any of the Agents or any of their

respective affiliates directors officers employees advisors representatives agents or any person who

controls any of them accepts any responsibility for the contents of this offering circular or for any other

statement made or purported to be made by the Initial Purchasers or on their behalf in connection with the

Issuer and the Company or the issue and offering of the Notes or the Guarantee. Each of the Initial

Purchasers the Trustee the Agents and any of their respective affiliates directors officers employees or

advisers accordingly disclaims any and all liability whether arising in tort or contract or otherwise which it

might otherwise have in respect of this offering circular or any such statement. None of the Initial

Purchasers the Trustee the Agents or any of their respective affiliates directors officers employees

advisers representatives agents or any person who controls any of them undertakes to review the results of

operations financial condition or affairs of the Issuer or the Company during the life of the arrangements

contemplated by this offering circular nor to advise any investor or potential investor in the Notes of any

information coming to the attention of the Initial Purchasers the Trustee or the Agents.This offering circular includes particulars given in compliance with the Rules Governing the Listing of

Securities on The Stock Exchange of Hong Kong Limited for the purpose of giving information with regard

to the Issuer the Company and the Group. The Issuer and the Company accept full responsibility for the

accuracy of the information contained in this document and confirm having made all reasonable enquiries

that to the best of their knowledge and belief there are no other facts the omission of which would make any

statement herein misleading.The distribution of this offering circular and the offer and sale of the Notes may in certain jurisdictions be

restricted by law. Each purchaser of the Notes must comply with all applicable laws and regulations in force

in each jurisdiction in which it purchases offers or sells the Notes or possesses or distributes this offering

circular and must obtain any consent approval or permission required for the purchase offer or sale by it of

the Notes under the laws and regulations in force in any jurisdiction to which it is subject or in which it

makes purchases offers or sales.Notice to Prospective Investors in the European Economic Area (the “EEA”) – This offering circular

isnot a prospectus for the purposes of Regulation (EU) 2017/1129 as amended.Prohibition of Sales to EEA Retail Investors – The Notes are not intended to be offered sold or otherwise

made available to and should not be offered sold or otherwise made available to any retail investor in the

EEA. For these purposes a “retail investor” means a person who is one (or both) of: (i) a retail client as

defined in point (11) of Article 4(1) of Directive 2014/65/EU as amended (“MiFID II”); or (ii) a customer

within the meaning of Directive (EU) 2016/97 as amended (the “Insurance Distribution Directive”) where

that customer would not qualify as a professional client as defined in point (10) of Article 4(1) of MiFID II.Consequently no key information document required by Regulation (EU) No 1286/2014 as amended (the

“PRIIPs Regulation”) for offering or selling the Notes or otherwise making them available to retail investors

in the EEA has been prepared and therefore offering or selling the Notes or otherwise making them available

to any retail investor in the EEA may be unlawful under the PRIIPs Regulation.Prohibition of Sales to United Kingdom Retail Investors – The Notes are not intended to be offered sold

or otherwise made available to and should not be offered sold or otherwise made available to any retail

investor in the United Kingdom. For these purposes a “retail investor” means a person who is not a

professional client as defined in point (8) of Article 2(1) of Regulation (EU) No 600/2014 as it forms part

of domestic law in the United Kingdom (“UK MiFIR”). Consequently no key information document

required by Regulation (EU) No 1286/2014 as it forms part of domestic law in the United Kingdom (the

–– iii ––“UK PRIIPs Regulation”) for offering or selling the Notes or otherwise making them available to retail

investors in the United Kingdom has been prepared and therefore offering or selling the Notes or otherwise

making them available to any retail investor in the United Kingdom may be unlawful under the UK PRIIPs

Regulation.Persons into whose possession this offering circular comes are required by the Issuer the Company the

Initial Purchasers the Trustee and the Agents to inform themselves about and to observe any such

restrictions. No action is being taken to permit a public offering of the Notes or the possession or

distribution of this offering circular or any offering or publicity materials relating to the Notes in any

jurisdiction where action would be required for such purposes. There are restrictions on the offer and sale of

the Notes the Company giving the Guarantee and the circulation of documents relating thereto in certain

jurisdictions and to persons connected therewith. See “Subscription and Sale” for a description of certain

restrictions on the offer and sale of the Notes and the circulation of documents relating thereto in certain

jurisdictions.Important Notice to Prospective Investors

Prospective investors should be aware that certain intermediaries in the context of this offering of the Notes

including certain Initial Purchasers are “capital market intermediaries” (“CMIs”) subject to Paragraph 21 of

the Code of Conduct for Persons Licensed by or Registered with the Securities and Futures Commission (the

“SFC Code”). This notice to prospective investors is a summary of certain obligations the SFC Code

imposes on such CMIs which require the attention and cooperation of prospective investors. Certain CMI(s)

may also be acting as “overall coordinator(s)” (“OC(s)”) for this offering and are subject to additional

requirements under the SFC Code.Prospective investors who are the directors employees or major shareholders of the Issuer the Company a

CMI or its group companies would be considered under the SFC Code as having an association

(“Association”) with the Issuer the Company the CMI or the relevant group company. Prospective investors

associated with the Issuer the Company or any CMI (including its group companies) should specifically

disclose this when placing an order for the Notes and should disclose at the same time if such orders may

negatively impact the price discovery process in relation to this offering. Prospective investors who do not

disclose their Associations are hereby deemed not to be so associated. Where prospective investors disclose

their Associations but do not disclose that such order may negatively impact the price discovery process in

relation to this offering such order is hereby deemed not to negatively impact the price discovery process in

relation to this offering.Prospective investors should ensure and by placing an order prospective investors are deemed to confirm

that orders placed are bona fide are not inflated and do not constitute duplicated orders (i.e. two or more

corresponding or identical orders placed via two or more CMIs). If a prospective investor is an asset

management arm affiliated with any Initial Purchaser such prospective investor should indicate when

placing an order if it is for a fund or portfolio where the Initial Purchaser or its group company has more

than 50 per cent. interest in which case it will be classified as a “proprietary order” and subject to

appropriate handling by CMIs in accordance with the SFC Code and should disclose at the same time if

such “proprietary order” may negatively impact the price discovery process in relation to this offering.Prospective investors who do not indicate this information when placing an order are hereby deemed to

confirm that their order is not a “proprietary order”. If a prospective investor is otherwise affiliated with any

Initial Purchaser such that its order may be considered to be a “proprietary order” (pursuant to the SFC

Code) such prospective investor should indicate to the relevant Initial Purchaser when placing such order.Prospective investors who do not indicate this information when placing an order are hereby deemed to

confirm that their order is not a “proprietary order”. Where prospective investors disclose such information

–– iv ––but do not disclose that such “proprietary order” may negatively impact the price discovery process in

relation to this offering such “proprietary order” is hereby deemed not to negatively impact the price

discovery process in relation to this offering.Prospective investors should be aware that certain information may be disclosed by CMIs (including private

banks) which is personal and/or confidential in nature to the prospective investor. By placing an order

prospective investors are deemed to have understood and consented to the collection disclosure use and

transfer of such information by the Initial Purchasers and/or any other third parties as may be required by

the SFC Code including to the Issuer the Company any OC(s) relevant regulators and/or any other third

parties as may be required by the SFC Code it being understood and agreed that such information shall only

be used for the purpose of complying with the SFC Code during the bookbuilding process for this offering.Failure to provide such information may result in that order being rejected.–– v ––NOTICE TO PROSPECTIVE INVESTORS IN THE UNITED KINGDOM

The communication of this offering circular and any other document or materials relating to the issue of the

Notes offered hereby is not being made and this offering circular and such documents and/or materials have

not been approved by an authorised person for the purposes of section 21 of the United Kingdom’s

Financial Services and Markets Act 2000 as amended (the “FSMA”). Accordingly this offering circular and

such documents and/or materials are not being distributed to and must not be passed on to the general

public in the United Kingdom. This offering circular and such other documents and/or materials are for

distribution only to persons who (i) have professional experience in matters relating to investments and who

fall within the definition of investment professionals (as defined in Article 19(5) of the Financial Services

and Markets Act 2000 (Financial Promotion) Order 2005 as amended (the “Financial Promotion Order”))

(ii) fall within Article 49(2)(a) to (d) of the Financial Promotion Order (iii) are outside the United Kingdom

or (iv) are other persons to whom it may otherwise lawfully be communicated or distributed under the

Financial Promotion Order (all such persons together being referred to as “relevant persons”). This offering

circular and any such other documents and/or materials are directed only at relevant persons and must not be

acted on or relied on by persons who are not relevant persons. Any investment or investment activity to

which this offering circular and any such other documents and/or materials relate will be engaged in only

with relevant persons. Any person in the United Kingdom that is not a relevant person should not act or rely

on this offering circular or any other documents and/or materials relating to the issue of the Notes offered

hereby or any of their contents.–– vi ––CERTAIN DEFINITIONS AND CONVENTIONS

In this Offering Circular references to:

* “CNOOC” are to China National Offshore Oil Corporation (中國海洋石油集團有限公司 ) a state

owned enterprise incorporated under the laws of the PRC and the controlling shareholder of the Company;

* “CNOOC Limited” are to CNOOC Limited (中國海洋石油有限公司) a company incorporated in

Hong Kong under the Companies Ordinance (Cap. 32) of Hong Kong with limited liability and a

subsidiary of CNOOC;

* “CNOOC Group” are to CNOOC and its subsidiaries and affiliates excluding the Group;

* “CNY” “RMB” or “Renminbi” are to the Renminbi the official currency of the PRC;

* “Company” “Guarantor” or “COSL” are to China Oilfield Services Limited (中海油田服務股份有限

公司) a company established under the laws of the PRC;

* “Group” are to the Company and its subsidiaries;

* “Issuer” are to COSL Singapore Capital Ltd. a wholly owned indirect subsidiary of the Company

established under the laws of Singapore;

* “NSSF” are to the National Social Security Fund;

* “PBOC” are to the People’s Bank of China the central bank of the PRC;

* “PRC” or “China” are to the People’s Republic of China excluding for the purpose of this Offering

Circular only the Hong Kong Special Administrative Region the Macau Special Administrative

Region and Taiwan region;

* “SAFE” are to the State Administration of Foreign Exchange of the PRC;

* “SASAC” are to the State-owned Assets Supervision and Administration Commission; and

* “US$” or “U.S. dollar” are to United States dollars the official currency of the United States of

America.* Although there is no official definition of “offshore China” for the purposes of this Offering Circular

unless otherwise stated offshore China does not include shallow water with a depth of less than five

metres.For definitions of certain offshore oilfield services industry terms please refer to “Glossary.”

Unless otherwise indicated all references in this offering circular to “Notes” are to any of the Notes; all

references in this offering circular to “Terms and Conditions of the Notes” are to the terms and conditions

governing the Notes as set out in “Terms and Conditions of the Notes”.References in this Offering Circular to the Guarantor’s daily production figures are calculated on the basis of

a 365-day year.–– vii ––Solely for investors’ convenience this Offering Circular contains translations of certain Renminbi amounts

into U.S. dollar amounts at specified rates. Unless indicated otherwise the translation of Renminbi amounts

into U.S. dollar amounts has been made at the rate of RMB7.1636 to US$1.00 respectively the exchange

rate set forth in the H.10 weekly statistical release of the Board of Governors of the Federal Reserve System

of the United States on 30 June 2025. Investors should not construe these translations as representations that

the Renminbi amounts could actually be converted into any U.S. dollar at the rates indicated or at all.Market data and certain industry forecasts and statistics in this Offering Circular have been obtained from

both public and private sources including market research publicly available information and industry

publications. Although this information is believed to be reliable it has not been independently verified by

the Issuer the Guarantor the Initial Purchasers or their respective directors and advisors and neither the

Issuer the Guarantor the Initial Purchasers nor their respective directors and advisors makes any

representation as to the accuracy or completeness of that information. Such information may not be

consistent with other information compiled within or outside the PRC. In addition third party information

providers may have obtained information from market participants and such information may not have been

independently verified. This Offering Circular summarises certain documents and other information and

investors should refer to them for a more complete understanding of what is discussed in those documents.In making an investment decision each investor must rely on its own examination of the Issuer the

Guarantor and the terms of the offering and the Notes including the merits and risks involved.–– viii ––PRESENTATION OF FINANCIAL INFORMATION

The Group’s consolidated financial and other information as at and for the years ended 31 December 2022

2023 and 2024 are included elsewhere in this Offering Circular and have been extracted from its

consolidated financial statements as at and for the years ended 31 December 2023 and 2024 audited by Ernst

& Young.The Group’s consolidated financial and other information as at and for the six months ended 30 June 2024

and 2025 are included elsewhere in this Offering Circular and have been extracted from its consolidated

financial statements as at and for the six months ended 30 June 2025 reviewed by Ernst & Young.The Company prepares its consolidated financial statements in accordance with Hong Kong Financial

Reporting Standards (“HKFRSs”) issued by the Hong Kong Institute of Certified Public Accountants

(“HKICPA”). The Group’s consolidated financial statements as at and for the years ended 31 December

2022 2023 and 2024 have been audited by Ernst & Young the Company’s independent auditor in

accordance with Hong Kong Standards on Auditing issued by HKICPA. HKFRSs differs in certain material

respects from generally accepted accounting principles of other jurisdictions. The Company applied

Amendments to HKAS 12 Deferred Tax related to Assets and Liabilities arising from a Single Transaction.Accordingly the comparative amounts as at and for the year ended 31 December 2022 are restated in our

consolidated financial statements as at and for the year ended 31 December 2023. Such restated financial

information have been presented throughout the offering circular.All financial information descriptions and other information in this Offering Circular regarding the

Company’s activities financial condition and results of operations are unless otherwise indicated or

required by context presented on a consolidated basis.Certain numerical figures set out in this Offering Circular including financial data presented in billions

millions or thousands have been subject to rounding adjustments and as a result the totals of the data in

this Offering Circular may vary slightly from the actual arithmetic totals of such information.Our reporting currency is Renminbi.–– ix ––ENFORCEMENT OF JUDGMENTS

The Issuer is a Singapore company incorporated in and under the laws of Singapore with limited liability

and the Guarantor is a company incorporated with limited liability in the PRC. The Issuer is a wholly owned

indirect subsidiary of the Guarantor and will not conduct business or any other activities other than the

offering sale issuance or incurrence of Indebtedness and the lending of the proceeds thereof to any

company controlled directly or indirectly by the Guarantor and any other activities in connection therewith

or related thereto in accordance with the Terms and Conditions of the Notes.A substantial majority of the Guarantor’s businesses assets and operations are located in the PRC. In

addition a substantial majority of the Guarantor’s Directors and executive officers reside in the PRC and

substantially all of their assets are located in the PRC. As a result it may not be possible to serve legal

written process outside the PRC upon the Guarantor or such Directors or executive officers including with

respect to matters arising under securities laws of jurisdictions outside the PRC. Moreover the PRC does not

have treaties providing for the reciprocal recognition and enforcement of judgments of courts with the

United Kingdom and many other countries. As a result recognition and enforcement in the PRC of

judgments of a court in any jurisdiction outside the PRC in relation to any matter may be difficult or

impossible. Furthermore with respect to the recognition and enforcement of judgments of Hong Kong courtsin the PRC courts see “Risk Factors – Risks relating to the Notes and the Guarantee – Additionalprocedures may be required to be taken to bring English law-governed matters or disputes to the Hong Kong

courts and the Noteholders would need to be subject to the exclusive jurisdiction of the Hong Kong courts.There is also no assurance that the PRC courts will recognise and enforce judgments of the Hong Kongcourts in respect of English law-governed matters or disputes”.–– x ––CAUTIONARY STATEMENT REGARDING

FORWARD-LOOKING STATEMENTS

This Offering Circular contains certain forward-looking statements and information that involve risks

assumptions and uncertainties. All statements other than statements of historical facts are forward-looking

statements. Such forward-looking statements may include without limitation statements relating to the

Company’s competitive position its business strategies and plans its future business condition future

financial results cash flows financing plans and dividends and future regulatory and other developments in

the PRC in respect of the industry the Company has been engaged in.The words “anticipate” “believe” “could” “estimate” “intend” “may” “seek” “will” and similar

expressions as they relate to the Company are intended to identify certain of these forward-looking

statements. These statements involve known and unknown risks uncertainties and other factors that may

cause the Company’s actual results performance or achievements to be materially different from those

expressed or implied by the forward-looking statements. In addition these forward-looking statements

reflect the Company’s current views with respect to future events and are not guarantees of the Company’s

future performance. Actual results may differ materially from those expressed or implied in the forward-

looking statements as a result of a number of factors including without limitation:

* changes in the global economic conditions;

* the deterioration of the outlook for future profits and cash flows for any of the Company’s reporting

segments as the result of many possible factors including but not limited to increased or

unanticipated competition technology becoming obsolete reductions in customer capital spending

plans loss of key personnel adverse legal or regulatory judgment(s) future operating losses at a

reporting segment downward forecast revisions or restructuring plans;

* a decline in oil or natural gas production and the impact of general economic conditions on the

demand for oil and natural gas and oilfield services and the availability of capital;

* price volatility of oil and natural gas prices and the effect that lower prices may have on the level of

exploration development and production activity of and the corresponding capital spending by oil

and gas companies and demand for oilfield services;

* difficulties in managing the Company’s growth and the related demands on its resources;

* risks in connection with estimates of overall risks and costs of lengths of the time needed to complete

relevant projects;

* availability and price of raw materials equipment and personnel;

* expected production or processing capacities including expected rated capacities and primary drilling

capacities of units or facilities not yet in operation;

* the Company’s current level of indebtedness and the effect of any increase in the level of its indebtedness;

* the Company’s ability to generate sufficient cash flows to repay its debt obligations and fund its

capital expenditures;

–– xi ––* future capital requirements and uncertainty of obtaining additional funding on terms acceptable to the

Company;

* the Company’s carrying amounts of long-lived assets that are subject to impairment testing;

* effect of seasonal factors;

* reliance on a limited number of customers and in particular CNOOC Limited;

* reliance on subcontractors and other third parties for the Company’s business;

* changes in the assumptions upon which the Company has prepared its projected financial information

and capital expenditure plans;

* impact of environmental health and safety and other governmental and industry regulations and of

current or pending legislation;

* hazardous risky drilling operations and adverse weather and environmental conditions;

* risks in connection with currency fluctuations;

* ability to compete effectively against competitors;

* risks in connection with historical and future acquisitions and the integration of significant

acquisitions;

* changes in the political economic legal and social conditions in the PRC and other relevant

jurisdictions including the PRC government’s and other relevant foreign governments’ policies and

initiatives with respect to economic development in light of the recent global economic downturn

foreign exchange policies foreign investment activities regulations associated with oil and gas

market in the PRC and such other jurisdictions and policies; and

* political uncertainties and changes in U.S. or international sanctions in connection with the countries

where the Company operates.All of the Company’s forward-looking statements made herein and elsewhere are qualified in their entirety

by the risk factors discussed in “Risk Factors” in this Offering Circular. These risk factors and statements

describe circumstances which could cause actual results to differ materially from those contained in any

forward-looking statements. Other sections of this Offering Circular include additional factors which could

adversely impact the Company’s business and financial performance. Moreover the Company operates in an

evolving environment. New risk factors and uncertainties emerge from time to time and it is not possible for

the Company’s management to predict all risk factors and uncertainties nor can the Company assess the

impact of all factors on its business or the extent to which any factor or combination of factors may cause

actual results to differ materially from those contained in any forward-looking statements.The forward-looking statements made in this Offering Circular relate only to events or information as at the

date on which the statements are made in this Offering Circular. The Issuer or the Company undertakes no

obligation to update or revise publicly any forward-looking statements whether as a result of new

information future events or otherwise after the date on which the statements are made or to reflect the

occurrence of unanticipated events. Prospective investors should read this Offering Circular with the

understanding that the Company’s actual future results may be materially different from what it expects.Prospective investors should not rely upon forward-looking statements as predictions of future events.–– xii ––TABLE OF CONTENTS

Page

SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

THE OFFERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

RISK FACTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

USE OF PROCEEDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

CAPITALISATION AND INDEBTEDNESS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

SELECTED HISTORICAL CONSOLIDATED FINANCIAL INFORMATION . . . . . . . . . . . . . . 45

THE ISSUER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

THE GUARANTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

BUSINESS OF THE GROUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

MANAGEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

TERMS AND CONDITIONS OF THE NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

SUMMARY OF PROVISIONS RELATING TO THE NOTES IN GLOBAL FORM . . . . . . . . . 116

TAXATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

SUBSCRIPTION AND SALE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

GLOSSARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS . . . . . . . . . . . . . . . . . . . . . . . . . F-1

–– xiii ––SUMMARY

This summary highlights information contained elsewhere in this Offering Circular. This summary is derived

from qualified by and must be read in conjunction with the more detailed information and the consolidated

financial statements appearing elsewhere in this Offering Circular. This summary should be read together

with this entire Offering Circular carefully including the Group’s consolidated financial statements and

related notes and “Risk Factors”.Overview

The Company listed on the Hong Kong Stock Exchange (HK stock code: 02883) and Shanghai Stock

Exchange (Shanghai stock code: 601808) is one of the leading integrated oilfield services providers in the world.The Company provides comprehensive services for the exploration development and production of oil and

gas including geophysical acquisition and surveying services drilling services well services marine support

services and integrated solution and new energy services and also offers one-stop solution and general

contracting service. The Company provides integrated oilfield services overseas including in Asia Pacific

Middle East Americas Europe and Africa.The Company operates and manages the largest offshore operation fleet with the most comprehensive

functions in China. As at 30 June 2025 the Company owned and/or operated a fleet of offshore oilfield

services facilities globally comprising 60 drilling rigs (of which 46 are jack-up drilling rigs and 14 are

semi-submersible drilling rigs) over 200 vessels including AHTS vessels platform supply vessels and

standby vessels five towing streamer seismic vessels five ocean bottom seismic vessels and four integrated

marine survey and geotechnical vessels as well as a vast array of modern facilities and equipment for

logging drilling fluids directional drilling cementing and well work-over services.Capitalising on its long-term relationships with clients and its capacity to offer comprehensive services the

Company has maintained a dominant market position in offshore China and has expanded overseas by

offering integrated services and services that may be tailored to accommodate clients’ needs. For the years

ended 31 December 2022 2023 and 2024 and for the six months ended 30 June 2024 and 2025 revenue

sourced outside China represented approximately 17.6% 21.5% 22.5% 24.6% and 23.7% respectively of

the Company’s total revenue.The Company was registered on 26 September 2002 in the PRC as a joint stock limited company through

the restructuring of various subsidiaries of CNOOC. As at 30 June 2025 CNOOC was the Company’s

controlling shareholder and beneficially owned approximately 50.86% of the Company’s issued share

capital. CNOOC was established in 1982 by the PRC government as a state-owned offshore petroleum

company and is owned and controlled by the SASAC in which 90% of the equity interest is held by the

SASAC and 10% of the equity interest is held by the NSSF. CNOOC’s core business is offshore oil and gas

exploration and production. The Company’s H shares were listed on the main board of the Hong Kong Stock

Exchange on 20 November 2002 (stock code: 02883) and the Company’s A shares were listed on the main

board of the Shanghai Stock Exchange on 28 September 2007 (stock code: 601808).The Company’s largest customer is CNOOC Limited the largest producer of offshore crude oil and natural

gas in China. CNOOC holds exclusive right from the PRC government to enter into PSCs with foreign

partners relating to petroleum resources exploitation in offshore China. CNOOC assigned CNOOC Limited

all of its rights and obligations under then-existing PSCs in 1999 and has undertaken to assign CNOOC

Limited its future PSCs with the exception of those relating to CNOOC’s administrative functions. The

Company also regularly enters into transactions with other members of the CNOOC Group. For the years

ended 31 December 2022 2023 and 2024 and for the six months ended 30 June 2024 and 2025 revenue

derived from CNOOC Group (excluding CNOOC Limited and its subsidiaries) represented 2.1% 1.4%

–– 1 ––1.4% 0.4% and 0.7% respectively of the Company’s revenue and revenue from CNOOC Limited and its

subsidiaries represented approximately 81.2% 80.6% 77.4% 76.7% and 76.9% respectively of the

Company’s revenue for the same periods.For the years ended 31 December 2022 2023 and 2024 and for the six months ended 30 June 2024 and

2025 the Company recorded revenue of approximately RMB35658.9 million RMB44108.6 million

RMB48301.6 million RMB22528.5 million and RMB23320.3 million respectively and the Company’s

profit for the years ended 31 December 2022 2023 and 2024 and for the six months ended 30 June 2024 and

2025 was approximately RMB2499.2 million RMB3282.6 million RMB3399.1 million RMB1709.6

million and RMB2076.8 million respectively.The following chart outlines the Company’s group structure containing its material subsidiaries as at 30 June

2025:

China Oilfield Services Limited

()

(the “Guarantor”)

100%100%100%

COSL Hainan Ltd. COSLDeepwater Tianjin Eco-friendlyTechnology Co. Ltd. Technology Co. Ltd.Onshore

Offshore

100%100%100%

COSLHongKong COSLAmerica China Oilfield

International Inc Services (BVI)

Limited Limited

61.54%100%100%100%

38.46%

COSLDrilling COSLSingapore ChinaOilfield COSLMiddle East

Pan Pacific Ltd. Ltd Services SoutheastAsia (BVI) Ltd FZE

100%100%100%49%100%

COSLOil- COSL

Tech Drilling Pan-

COSL PT

Samudra COSLPacific Singapore Timur Norwegian(Singapore)

LTD (Labuan )

Capital Ltd. AS

Ltd (the “Issuer”) Santosa

Competitive Strengths

* The Company has a unique integrated business model offering services that cover the entire value

chain of the offshore oilfield services industry

* The Company has established a dominant market position in offshore China through its strategic

relationship with CNOOC and engages in diverse international operations

–– 2 ––* The Company benefits from a competitive cost structure robust operating margins and steady cash

flows

* The Company has a strong R&D capability and has actively invested in updating its equipment

* Capitalising on its intellectual properties the Company has strengthened its technological capability

and competitiveness

* The Company enjoys robust financing capability

* The Company has a highly experienced management team and a corporate culture that implements its

core values

Business Strategies

Amidst evolving industry dynamics the Company is comprehensively focused on five development

strategies – “technology-driven strategy” “cost-leadership strategy” “integration strategy”

“internationalisation strategy” and “regional development strategy”. Guided by a new development

philosophy the Company is committed to a strategic transition from asset-heavy operations towards a model

that prioritises technology and asset-light approaches. With balanced emphasis on both domestic and

international markets as well as coordinated advancement across offshore and onshore sectors the Company

strives to enhance its professional technical services and support capabilities.The Company is accelerating technological innovation embracing internationalisation exploring new energy

business opportunities and driving digitalisation and intelligent transformation. Through these concerted

efforts by 2030 the Company will have built a world-class energy service company with Chinese

characteristics in all respects.Technology-driven strategy: Always focus on basic scientific exploration applied scientific verification

and industrial application guidance with perspective of the industry and development so as to promote the

systematization and standardization of research and development system. The Company will continue to

enhance the core competitiveness of technology with greater determination and pragmatism and make

technology development the core engine that drives the Company’s development.Cost-leadership strategy: Reshape the cost advantage enhance the ability of cost control and formulate its

competitiveness. The Company deeply roots the concept of creating value for customers in its value and well

integrates its business into the customer value chain. Relying on our efforts of creating added value for

customers the Company can improve customer investment efficiency and returns.Integration strategy: Taking comparative advantage of the Company’s complete professional chain

increasing product categories and complete business chain the Company re-understands defines and

expands the meaning of integration. The Company will establish new integration model so as to achieve

benefits and efficiency to the greatest extent. The Company will also promote the development of integrated

business of COSL and continuously provide value-added services for customers making integrated services

as breakthrough and value-added tool for the transformation and upgrading of various traditional businesses

so as to expand the main segment and increase market share for the Company.Internationalisation strategy: Expand the simple market internationalization into the internationalization of

global comprehensive governance build a world-class governance ability and further develop the space for

surviving and operating as the world-class energy service companies in order to organically complement the

domestic market with the international market for the Company’s better development.–– 3 ––Regional development strategy: Fully exploit domestic oil companies’ comparative advantages of solid

reserves management fine reservoir engineering research and practical process technology complemented

by an all-round fully integrated and partially integrated business model involving exploration development

engineering and production together with profitable models of service product sales and equipment leasing

so as to promote the balanced development of the full range of businesses in the region and the

implementation of global strategy with lower costs and risks.Recent Developments

Overview of the results for the nine months ended 30 September 2025

For the nine months ended 30 September 2025 the Company experienced a significant increase in net profit

attributable to shareholders of the Company as compared with the same period in the preceding year mainly

due to the improved occupancy rate of the large-scale equipment of the Company and the smooth operation

of high daily-rate project of semi-submersible rigs in North Sea which propelled the growth in profits. For

the nine months ended 30 September 2025 the Company experienced a significant decrease in net cash flow

from operating activities as compared with the same period in the preceding year mainly due to the fact that

certain business were to be settled.Potential investors must exercise caution when using such information to evaluate our financial condition

and results of operations. Such financial information for the nine months ended 30 September 2025 should

not be taken as an indication of our expected financial condition or results of operations for the full financialyear ending 31 December 2025. See “Risk Factors – Risks Relating to the Company’s Business – Potentialinvestors should not place undue reliance on our unaudited and unreviewed financial information or the

discussion of material financial trends in relation to our unaudited and unreviewed financial information asat and for the nine months ended 30 September 2025”.Entering into the Master Services Framework Agreement

The Company has entered into the master service framework agreement with CNOOC on 29 October 2025

(the “2025 Framework Agreement”). Pursuant to the 2025 Framework Agreement the Group has agreed to

continue to provide the oilfield services (including drilling services well services marine support services

geophysical acquisition and surveying services and new energy business services) to the CNOOC Group

and the CNOOC Group has agreed to continue to provide the machineries for leasing kinetic energy supply

and transportation of materials wharf services construction services energy services labour services

utilities and other ancillary services as well as the leasing of certain properties to the Group for the three

years ending 31 December 2026 2027 and 2028.Upon approval at the 2025 first extraordinary general meeting of the Company the 2025 Framework

Agreement will be effective from 1 January 2026.–– 4 ––THE OFFERING

This following summary of the offering contains basic information about the Notes. It is not intended to be

complete and it is subject to important limitations and exceptions. For a more complete understanding of the

Notes see “Terms and Conditions of the Notes”.Issuer COSL Singapore Capital Ltd.Legal Entity Identifier of the 300300WB9ZSCZYXDFJ80.Issuer

Company/Guarantor China Oilfield Services Limited (中海油田服務股份有限公司).Guarantee The Notes will have the benefit of the Deed of Guarantee executed

by the Guarantor. Pursuant to the Deed of Guarantee the Guarantor

will unconditionally and irrevocably guarantee the due and punctual

payment of all sums expressed to be payable by the Issuer under

the Trust Deed in respect of the Notes as further described in

Conditions 3(b) of the Terms and Conditions of the Notes.The Guarantor has registered the issuance of the Notes with the

NDRC and obtained a certificate from the NDRC dated 2 February

2026 evidencing such registration. Pursuant to the registration

certificate the Guarantor will cause relevant information relating to

the issue of the Notes to be reported to the NDRC within the

relevant prescribed timeframe after the issue date of the Notes.The Guarantor shall register or cause to be registered with the State

Administration of Foreign Exchange or its local branch (“SAFE”)

the Deed of Guarantees in accordance with the Provisions on the

Foreign Exchange Administration of Cross-Border Guarantees (跨

境擔保外匯管理規定) within 15 working days after the executionof the Deed of Guarantee (the “Cross-Border SecurityRegistration”) and use its best endeavours to complete the Cross-

Border Security Registration on or before the Registration Deadline

and obtain a registration evidence (業務登記憑證) from SAFE.Upon completion by the Guarantor of the Cross-Border Security

Registration and in any event on or prior to the Registration

Deadline it will deliver to the Trustee on or before the relevant

Registration Deadline a certificate in substantially the form set out

in the Trust Deed of a director or duly authorised officer of the

Guarantor confirming the completion of the registration with SAFE

of the Deed of Guarantee together with a true and correct copy of

the relevant SAFE registration evidence (業務登記憑證 ) and any

other document (if applicable) issued by SAFE evidencing the

completion of the SAFE registration.The Notes CNY5000000000 1.95% Guaranteed Notes due 2029.Issue Price 100.00%.–– 5 ––Issue Date 16 March 2026.Maturity Date 16 March 2029.Risk Factors Investing in Notes involves certain risks. The principal risk factors

that may affect the abilities of the Issuer and the Guarantor to fulfil

their respective obligations in respect of the Notes the Trust Deedand the Deed of Guarantee are discussed under the section “RiskFactors” below.Joint Lead Managers and Joint BOCI Asia Limited CLSA Singapore Pte Ltd and J.P. Morgan

Global Coordinators Securities Asia Private Limited.Trustee Citicorp International Limited.CMU Lodging and Paying Agent Citicorp International Limited.Registrar and Transfer Agent

Clearing Systems The Notes will be represented by the Global Certificate

substantially in the form scheduled to the Trust Deed. The Global

Certificate will be registered in the name of and lodged with a sub-

custodian for the CMU Operator and will be exchangeable for

Definitive Certificates only in the circumstances set out therein.Except in the limited circumstances described in the Global

Certificate owners of interests in the Notes represented by the

Global Certificate will not be entitled to receive Definitive

Certificates in respect of their individual holdings of Notes. For

persons seeking to hold a beneficial interest in the Notes through

Euroclear or Clearstream Luxembourg such persons will hold their

interest through an account opened and held by Euroclear or

Clearstream Luxembourg (as the case may be) with the CMU

Operator.ISIN HK0001249611.Common Code 327715909.CMU Instrument Number CILHFN26011.Form and Denomination The Notes will be issued in registered form in the minimum

denomination of CNY1000000 and integral multiples of

CNY10000 in excess thereof.Status of the Notes The Notes constitute direct unconditional unsubordinated and

unsecured obligations of the Issuer which will at all times rank pari

passu with all other unsecured and unsubordinated obligations of

the Issuer save for such obligations as may be preferred by

provisions of law that are both mandatory and of general

application and subject to Condition 4(a).–– 6 ––Status of the Guarantee The Guarantor shall unconditionally and irrevocably guarantee the

due and punctual payment of all sums expressed to be payable by

the Issuer in respect of the Notes. The Guarantee constitutes direct

unconditional unsubordinated and (subject to Condition 4)

unsecured obligations of the Guarantor which will at all times

rank at least pari passu with all other unsecured and unsubordinated

obligations of the Guarantor save for such obligations as may be

preferred by provisions of law that are both mandatory and of

general application and subject to Condition 4(a).Final Redemption Unless previously redeemed or purchased and cancelled the Notes

will be redeemed at their principal amount on 16 March 2029.Make Whole Redemption At any time and from time to time prior to 16 February 2029 the

Issuer may at its option redeem the Notes in whole or in part at a

redemption price equal to the Make Whole Price as at and accrued

and unpaid interest if any to (but not including) the redemption

date.Par Redemption The Issuer may at any time after 16 February 2029 redeem the

Notes in whole or in part at 100 per cent. of their principal

amount together with interest (if any) accrued to but excluding

the redemption date.Redemption for Taxation Reasons The Notes may be redeemed at the option of the Issuer in whole

but not in part at any time on giving not less than 30 nor more

than 60 days’ notice to the Noteholders (which notice shall be

irrevocable) at their Early Redemption Amount (Tax) together

with interest accrued (if any) to the date fixed for redemption in

the event of certain changes affecting taxes of certain jurisdictions

as further described in Condition 6(b) (Redemption for Taxation

Reasons) of the Terms and Conditions of the Notes.Redemption Upon a No At any time following the occurrence of a No Registration Event

Registration Event (as described in Condition 6 (Redemption and Purchase) of the

Terms and Conditions of the Notes) the holder of the Notes will

have the right at such holder’s option to require the Issuer to

redeem all but not part of that holder’s Notes on the No

Registration Event Redemption Date (as defined in the Terms and

Conditions of the Notes) at the Early Redemption Amount (No

Registration Event) together with accrued interest up to but

excluding the No Registration Event Redemption Date as further

described in Condition 6(c) (Redemption Upon a No Registration

Event) of the Terms and Conditions of the Notes.–– 7 ––Redemption Upon a Change of At any time following the occurrence of a Change of Control

Control Triggering Event Triggering Event (as described in Condition 6(d) (Redemption Upon

a Change of Control Triggering Event) of the Terms and

Conditions of the Notes) the holder of the Notes will have the

right at such holder’s option to require the Issuer to redeem all

but not part of that holder’s Notes at the relevant Early

Redemption Amount (Change of Control) together with accrued

interest up to but excluding the Change of Control Put Date as

further described in Condition 6(d) (Redemption Upon a Change of

Control Triggering Event) of the Terms and Conditions of the

Notes.Interest The Notes will bear interest at 1.95 per cent. per annum payable

semi-annually in arrear on 16 March and 16 September of each

year commencing on 16 September 2026.Covenants The Notes will contain certain covenants including Condition 4(a)

(Covenants – Limitation on Liens) Condition 4(b) (Covenants –

Consolidation Merger and Sale of Assets) Condition 4(c)

(Covenants – Limitation on the Issuer’s Activities) Condition

4(d) (Covenants – Financial Information) Condition 4(e)

(Covenants – Undertakings relating to the Guarantee) Condition

4(f) (Covenants – Undertaking relating to the NDRC) and

Condition 4(g) (Covenants – Corporate Existence).Use of Proceeds The net proceeds of the issue of the Notes will be used for

refinancing our existing indebtedness and general corporate

purposes in accordance with applicable PRC laws and regulations.See “Use of Proceeds”.Events of Default Events of Default for the Notes are set out in Condition 9 (Events

of Default) of the Terms and Conditions of the Notes.Withholding Tax All payments of principal and interest in respect of the Notes and/

or if the Guarantee is called the Guarantee by or on behalf of the

Issuer or the Guarantor shall be made free and clear of and without

withholding or deduction for or on account of any present or future

taxes duties assessments or governmental charges of whatever

nature imposed levied collected withheld or assessed by or on

behalf of Singapore or the PRC in each case including any political

subdivision territory or possession thereof and any authoritytherein having power to tax (each as applicable a “RelevantJurisdiction”) unless the withholding or deduction of such taxes

duties assessments or governmental charges is required by law. In

that event the Issuer or (as the case may be) the Guarantor shall

pay such additional amounts (the “Additional Amounts”) as will

result in receipt by the Noteholders after such withholding or

deduction of such amounts as would have been received by them

had no such withholding or deduction been required except that no

such Additional Amounts shall be payable in respect of any Note.–– 8 ––Listing Application will be made to the Hong Kong Stock Exchange for the

listing of and permission to deal in the Notes by way of debt

issues to Professional Investors only.Ratings The Notes are expected to be rated “A3” by Moody’s and “A-” by

Fitch.A rating is not a recommendation to buy sell or hold securities and

may be subject to suspension revision reduction or withdrawal at

any time by the assigning rating agency.Governing Law The Notes the Deed of Guarantee the Trust Deed and the Agency

Agreement (and any non-contractual obligations arising out of or in

connection with the Notes the Deed of Guarantee the Trust Deed

and the Agency Agreement) are governed by and shall be construed

in accordance with English law.Pursuant to the Trust Deed and the Deed of Guarantee each of the

Issuer and the Guarantor has (i) agreed for the benefit of the

Trustee and the Noteholders that the Hong Kong courts shall have

exclusive jurisdiction to settle any dispute arising out of or in

connection with the Notes the Deed of Guarantee and the Trust

Deed; (ii) agreed that those courts are the most appropriate and

convenient courts to settle any Dispute and accordingly that it will

not argue to the contrary; and (iii) designated China Oilfield

Services Limited (中海油田服務股份有限公司 )’s Hong Kong

office at 65/F Bank of China Tower One Garden Road Central

Hong Kong to accept service of any process on its behalf.Notices and Payment As long as the Global Certificate is held in its entirety on behalf of

the CMU Operator any notice to the holders of the Notes shall be

validly given by the delivery of the relevant notice to the CMU for

communication by the CMU to each relevant accountholder in

substitution for notification as required by the Conditions. Indirect

participants will have to rely on the CMU participants (through

whom they hold the Notes in the form of interests in the Global

Certificate) to deliver the notices to them subject to the

arrangements agreed between the indirect participants and the

CMU participants.Selling Restrictions For a description of certain restrictions on offers sales and

deliveries of Notes and on the distribution of offering material in

the United States of America the EEA the United Kingdom the

Republic of Italy Hong Kong the PRC and Singapore see

“Subscription and Sale”.–– 9 ––RISK FACTORS

Prior to making any investment decision prospective investors in the Notes should carefully consider the

following information in conjunction with the other information contained in this Offering Circular. The

Company believes that the factors described below represent the principal risks inherent in investing in the

Notes but the Company’s inability to fulfil its obligations on or in connection with the Notes may occur for

other reasons and the Company does not represent that the factors described below are exhaustive. The

following factors are contingencies which may or may not occur and the Company is not in a position to

express a view on the likelihood of any such contingency occurring.The Company’s business financial condition or results of operations could be materially and adversely

affected by any of these risks but additional risks of which the Company is not currently aware or which

the Company currently deems immaterial could also affect the Company’s business operations financial

condition or results of operations or its ability to fulfil its obligations under the Notes.The sequence in which the risk factors are presented below is not indicative of their likelihood of occurrence

or of the potential magnitude of their financial consequences.Risks Relating to the Company’s Industry

Economic uncertainty and the volatility of oil and gas prices could have a material adverse effect on the

Company’s financial condition results of operations and prospects.Demand for the Company’s products and services is particularly sensitive to oil and gas exploration

development production and transportation activity and the corresponding capital expenditure by oil and gas

companies. Prices of oil and gas are subject to wide fluctuations in response to changes in the supply and

demand for oil and gas overall economic conditions political developments production levels the price and

availability of other energy sources domestic and foreign government regulations and weather conditions

which are beyond the Company’s control.On 20 April 2020 the price of West Texas Intermediate oil for May 2020 delivery (expired on 21 April

2020) fell into negative territory for the first time in recorded history. While OPEC Russia and other

producers reached an agreement in March 2021 to reduce production oil prices remained unstable. The oil

price has an upward trend in 2021 due to monetary easing by central banks OPEC+ alliance’s decision to

extend production cut agreement. The imbalance between the supply of and demand for oil as well as the

uncertainty around the extent and timing of an economic recovery caused significant market volatility and a

substantial adverse effect on oil prices during the last two quarters of 2021. At the same time production by

OPEC+ the U.S. and non-OPEC countries has been increasing the global supply of oil. However geo-

political factors such as the Russian-Ukraine conflict sanctions imposed upon various Russian entities pose

challenges for oil supply and Iran’s conflict with Israel and the United States. Russian military actions

across Ukraine since February 2022 have led to a significant increase in international crude oil prices. Also

international crude oil prices might surge due to intensified U.S.-Israeli strikes on Iran. Such military

actions and sanctions in response thereof as well as escalation of conflict could significantly affect prices

and demand in global energy market and cause turmoil in the capital markets and generally in the global

financial system. In the first half of 2023 oil prices decreased to a low of U.S.$72.19 per barrel in

connection with developments in the banking sector such as the collapse of Silicon Valley Bank the take-

over of Credit Suisse and fears regarding a global recession concerns about China’s economic growth the

potential for a U.S. recession and higher than expected Russian oil exports that put downward pressure on

oil prices. During the second half of 2023 the average price of Brent oil increased to U.S.$85.34 per barrel.The increase was primarily due to resilience shown by the US economy and production cuts by OPEC+.During the first six months of 2024 the price of Brent oil remained strong increasing to U.S.$86.41 per

barrel as at 30 June 2024 due to the extension of OPEC+ cuts in production. The price of Brent Oil as of 31

–– 10 ––December 2024 decreased to U.S.$74.64 per barrel due to a decrease in oil demand. During January 2025

oil prices increased in response to the threat of U.S.-imposed tariffs. In March 2025 OPEC+ unexpectedly

announced that it would increase production by 411000 barrels of oil per day starting from May 2025. As

of 31 March 2025 the price of Brent oil was U.S.$75.81. In December 2025 the price of Brent oil fell to a

four-year low reaching U.S.$58.68 per barrel as of 16 December 2025. The volatility in the price of Brent

oil is primarily due to geopolitical tensions including the U.S. government’s announcement of tariffs on

U.S. imports and the decision by OPEC+ to increase production.A prolonged downturn in oil and gas prices could depress the level of exploration development production

and transportation activity which would likely reduce the demand for the Company’s services and products

place pressure on the prices that the Company charges for its services and reduce its profit margins and cash

flow. In addition demand for the Company’s products and services may not reflect the level of activity in

the industry and even during periods of high commodity prices customers may reduce their levels of capital

expenditures for exploration and production for a variety of reasons including their lack of success in

exploration efforts. Also as the Company’s pricing structure is based on global benchmark oil and gas

prices the Company’s profit margin may be negatively impacted as a result of the decline in benchmark

prices. In addition during economic recessions companies’ access to liquidity may be constrained or subject

to more onerous terms. Limited access to external funding has in the past caused some of the Company’s

customers to reduce their capital expenditure which in turn could have a negative impact on their demand

for the Company’s products or services or impair the ability of customers to pay the Company for the

Company’s products and services on a timely basis or at all. In addition the potential impact on the

liquidity of major financial institutions may limit the Company’s ability to fund its business strategy through

borrowings under either existing or new debt facilities and on terms the Company believes to be reasonable.Persistent volatility in the financial markets could have a material adverse effect on the Company’s ability to

refinance all or a portion of its indebtedness and to otherwise fund the Company’s operational requirements.Several other factors may significantly reduce demands for oil and gas for the long term including

availability of alternative and/or renewable sources of energy technological breakthroughs shifts in

consumer preferences and measures and other initiatives adopted or planned by governments to manage

climate change and carbon-dioxide emissions. Many governments have begun implementing policies to

transition the economy towards a low-carbon model of development through various means and strategies

including supporting development of renewable energies and the replacement of internal combustion engine

vehicles with electric vehicles including the possible adoption of stricter regulations on the use of

hydrocarbons. The initiatives to reduce worldwide greenhouse gas emissions and an ongoing energy

transition towards a low carbon economy may adversely affect the worldwide energy mix in the long-term

and may lead to structural lower oil and gas demands and prices.The occurrence of any of the above conditions may have a material adverse effect on the Company’s

financial condition results of operations and prospects.The Company is subject to intense competition in the markets in which the Company carries out its

operations which could limit the Company’s ability to maintain or increase its market share or maintain

its prices at profitable levels.The oilfield services industry is highly competitive. The Company’s primary markets are highly fragmented

and competitive. The Company competes both against large multinational companies as well as smaller

local companies. Some of the Company’s competitors have greater financial and other resources than the

Company does. Some competitors may be better positioned to withstand and adjust more quickly to volatile

market conditions such as fluctuations in oil and gas prices and production levels as well as changes in

government regulations. In addition as the Company expands its overseas operations the Company will face

–– 11 ––increasing competition in the international markets. If the Company’s competitors increase their capacity (or

do not reduce their capacity where overall demand decreases) the excess supply in the offshore oilfield

services market could put downward pressure on prices.In addition oilfield services companies compete primarily on a regional basis and the intensity of

competition may vary significantly from region to region at any particular time. The fact that drilling rigs

are mobile and can be moved from one market to another in response to market conditions intensifies the

competition and may cause an oversupply of rigs in an area. For instance if demand for drilling or

production services improves in a specific region in which the Company operates competitors may respond

by moving in suitable rigs from other regions which in turn could intensify competition in this region.The Company generally obtains its contracts through a competitive bidding process which is standard for

the offshore oilfield services industry in which the Company operates. The Company’s success in winning

contracts depends on its competitiveness in terms of a variety of factors such as price performance and

timeliness of service service quality technological capacity performance reputation experience of

personnel customer relations and long-standing relationships.While the Company must be competitive in its pricing its competitive strategy generally emphasises the

quality of its equipment the safety record of its rigs its ability to offer ancillary services and the quality of

service and experience of its rig crews to differentiate the Company from its competitors. The Company may

not be able to compete against its peers effectively when price competition becomes more intensive due to a

decrease in the demand for or an increase in the supply of the facilities vessels or equipment used in the

Company’s business such as drilling rigs well service rigs and rental tools and equipment whether through

new construction or refurbishment. Such developments can decrease the pricing and utilisation rates of the

Company’s production services which would adversely affect the Company’s revenues and profitability.The Company’s business is subject to governmental and industrial regulations in particular stringent

environmental protection laws and regulations which may adversely affect the Company’s future

operations.Oilfield services industry is subject to a variety of international federal provincial state foreign and local

laws and regulations including environmental health and safety and labour laws. The Company invests

substantial financial and managerial resources to maintain compliance with these laws and related permit

requirements. The Company’s failure to do so could result in fines or penalties enforcement actions claims

for personal injury or property damages or obligations to investigate and remediate contamination. Failure

to obtain or renew the required permits on a timely basis may also prevent the Company from operating

resulting in crew downtime and operating losses. Moreover if applicable laws and regulations including

environmental health and safety requirements or the interpretation or enforcement thereof become more

stringent in the future the Company could incur capital or operating costs beyond those currently

anticipated. The adoption of laws and regulations that directly or indirectly curtail exploration by oil and gas

companies could also materially adversely affect the Company’s operations by reducing the demand for the

Company’s geophysical products and services.In particular the Company may be affected by new environmental laws or regulations intended to limit or

reduce emissions of gases such as carbon dioxide and methane which may be contributing to climate

change that may impact the Company’s operations or more generally the production and demand for fossil

fuels such as oil and gas. The European Union (“EU”) and the United States have already established

greenhouse gas regulations and many other countries have adopted or are considering the adoption of such

regulations. This could cause the Company to incur additional direct or indirect costs resulting from the

Company’s suppliers incurring additional compliance costs that get passed on to the Company or that

reduce customers’ demand for the Company’s products or services.–– 12 ––From time to time legislative proposals have been introduced that would materially limit or prohibit

offshore drilling in certain areas due to concerns caused by events such as large-scale oil spill. Such

legislative proposals may require the adoption of enhanced safety requirements and approval and permit

requirements and restrictions on development and production activities in certain areas. This may have

negative effects and impact the operations of oil and gas companies. The Company’s client mix could be

altered with the disappearance of small and medium-sized players in the affected areas which could

decrease the Company’s sales of products and services.Maritime-related risks could disrupt and adversely affect the Company’s business activities financial

condition results of operations and prospects.The Company’s rigs may be chartered by customers operating in various countries and governed by the

applicable laws of these jurisdictions. Crew members suppliers of goods and services to a rig or vessel

shippers of cargo and other parties may be entitled to a maritime lien against a rig or vessel for unsatisfied

debts claims or damages. In many jurisdictions a maritime lien holder may enforce its lien by arresting an

asset through foreclosure proceedings. The arrest or attachment of one or more of the Company’s rigs or

vessels could interrupt the Company’s cash flow and require it to pay large sums of funds to have the arrest

lifted.The Company’s rigs and vessels may also operate in regions subjected to incidences of security threats

including piracy terrorist attacks wars/insurgency and internal strife. Attacks targeted at sea-going vessels

especially an actual attack on one of the Company’s rigs or vessels could result in such rig or vessel being

captured destroyed or damaged which could have a material adverse effect on the Company’s business

activities financial condition results of operations and prospects.Risks Relating to the Company’s Business

A significant portion of the Company’s revenue is derived from CNOOC Group in particular from

CNOOC Limited and changes in CNOOC Limited’s requirements and operations may have a material and

adverse effect on the Company’s business.A large portion of the Company’s revenue is generated from the provision of products and services to

CNOOC Group in particular CNOOC Limited. The Company derives a large portion of its revenue from

the sale of oilfield services and products to CNOOC Limited. For the years ended 31 December 2022 2023

and 2024 and for the six months ended 30 June 2024 and 2025 revenue derived from CNOOC Group

(excluding CNOOC Limited and its subsidiaries) represented 2.1% 1.4% 1.4% 0.4% and 0.7%

respectively of the Company’s revenue and revenue from CNOOC Limited and its subsidiaries

represented approximately 81.2% 80.6% 77.4% 76.7% and 76.9% respectively of the Company’s

revenue for the same periods.At present CNOOC Limited is the largest producer of offshore crude oil and natural gas in China; it is also

one of the largest independent oil and gas exploration and production companies in the world. Although

CNOOC Limited is affiliated with the Company there can be no assurance that CNOOC Limited will

necessarily continue to purchase the Company’s products and services. In addition because of CNOOC

Limited’s dominant position in the Company’s principal market there can be no assurance that the Company

will be able to negotiate higher prices for the products and services provided to CNOOC Limited. If

CNOOC Limited significantly reduces its purchase of the Company’s products or services for any reason or

if the Company will not be able to negotiate favourable prices for the products or services provided to

CNOOC Limited and the Company is unable to find comparable alternative customers the Company’s

business results of operations and financial condition would be adversely affected. For example based on

CNOOC Limited’s 2024 annual report released on 8 April 2025 its capital expenditure in China slightly

decreased in 2024 as compared to 2023 and its total capital expenditure experienced an increase from 2022

–– 13 ––to 2024. Any reduction in capital expenditure may reduce CNOOC Limited’s purchase of the Company’s

products or services and the Company cannot assure that the Company will be able to find comparable

alternative customers.In addition the Company may not always be able to adjust its business model and adapt its services to keep

pace with the business developments of CNOOC Limited. For example CNOOC Limited is expanding out

of the shallow water China Seas and is developing its overseas business; it has expanded its business into

deep-water explorations and unconventional oil and gas resources such as shale oil and gas and oil sands all

of which may pose challenge to the applicability of the Company’s asset base and skill set to CNOOC’s

needs. If the Company is unable to build up its organisation capacities to keep up with CNOOC Limited’s

increasing overseas presence and unconventional oil and gas resources business the Company’s business

results of operations and financial condition may be adversely affected.Certain affiliates of the Company have been included on lists maintained by U.S. authorities some of

which the Company has ongoing dealings with.On 27 October 2022 the Company and CNOOC entered into a master services framework agreement with

respect to provisions of a range of products and services including without limitation oilfield services

machinery leasing services equipment material and utilities services property services between the

Company and CNOOC Group for a period of three years ended 31 December 2025. On 29 October 2025

the Company has entered into the 2025 Framework Agreement with CNOOC for a period of three yearsended 31 December 2028. See “Business of the Group – Recent Developments – Entering into the MasterServices Framework Agreement”.The Company negotiated its transactions with the CNOOC Group on an arm’s length basis. The Company’s

independent non-executive directors have reviewed the transactions and have confirmed that these

transactions were entered into in the ordinary and usual course of business with normal commercial terms

or where there is no available comparison with terms no less favourable than those available from or to

independent third parties. The Company’s connected transactions have been through the review and approval

process pursuant to the Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong

Limited (the “Listing Rules”). If the Company fails to comply with the relevant rules or continue negotiation

on an arm’s length basis the Company may not be able to carry out the connected transactions as expected

which may have an adverse impact on the Company’s results of operations and financial conditions. See“Business of the Group – Competitive Strengths – The Company has established a dominant market positionin offshore China through its strategic relationship with CNOOC and engages in diverse internationaloperations”.In August 2020 the U.S. Department of Defense produced a list of “Communist Chinese MilitaryCompanies” (“CMC List”) pursuant to Section 1237 of the National Defense Authorisation Act for Fiscal

Year 1999. The U.S. Department of Defense (subsequently renamed to Department of War) has further

expanded the CMC List during 2020 and 2021. On 7 January 2025 the then U.S. Department of Defense

released an update to the CMC List and CNOOC CNOOC China Limited (“CNOOC China”) and CNOOC

International Trading Co. Ltd. (“CNOOC International Trading”) are among the companies listed in the

CMC List. As at the date of this Offering Circular neither the Issuer nor the Company is named on the

CMC List and neither the Issuer nor the Company holds any equity interest in or is held by CNOOC China

Limited or CNOOC International Trading. Currently inclusion on the CMC List is not equivalent to being

subject to economic sanctions administered by other authorities in the U.S. government. However it imposes

both direct and indirect restrictions on the ability of the then U.S. Department of Defense to enter into

contracts for the procurement of goods services or technology with the Company and the Issuer (and entities

under their respective control) and may impose such restrictions on other U.S. government agencies. It is not

possible to predict with certainty what additional restrictions or consequences may result from inclusion on

the CMC List if any may arise in the future or what impact such developments could have on our business.–– 14 ––On 3 June 2021 the U.S. President issued Executive Order 14032 titled “Addressing the Threat fromSecurities Investments that Finance Certain Companies of the People’s Republic of China” (“E.O. 14032”)

(the “Order”). According to the Order CNOOC and CNOOC Limited are among the companies listed in the

Annex to E.O 14032. U.S. persons are prohibited from buying and selling publicly traded securities or

derivative securities of the companies listed in the Annex. On 16 December 2021 the Office of Foreign

Assets Control (“OFAC”) of the U.S. Department of the Treasury published the updated “Non-SDN ChineseMilitary-Industrial Complex Companies List” (“NS-CMIC List”) and CNOOC and CNOOC Limited are

both on the NS-CMIC List. As at the date of this Offering Circular neither the Issuer nor the Company is

named on the NS-CMIC List. The prohibitions stipulated by the Order thus do not extend to the publicly

traded securities of the Issuer or the Company as at the date of this Offering Circular. However the U.S.Secretary of the Treasury is authorised under the Order to include additional entities that are owned or

controlled by an entity subject to the Order to the NS-CMIC List. Therefore there can be no assurance that

the Issuer and/or the Company will not be subject to the Order in the future.In addition CNOOC Limited is on the Entity List administered by the Bureau of Industry and Security of

the U.S. Department of Commerce (“BIS”). In September 2025 BIS issued a new rule in respect of the

Entity List (the “Affiliates Rule”) under which any entity that is at least 50 percent owned by one or more

entities on the Entity List or the Military End-User List or certain entities on the List of Specially

Designated Nationals and Blocked Persons will itself automatically be subject to the same restrictions as

entities on the Entity List. As a result if the Affiliates Rule is enforced persons may not be able to provide

certain items subject to the U.S. Export Administration Regulations (“EAR”) to CNOOC Limited or any

affiliate that is at least 50 percent owned by CNOOC Limited without a license from BIS. Noncompliance

with the EAR or other applicable export regulations may have an adverse impact on the business of

CNOOC Limited and may in turn adversely affect the Company’s business. Nonetheless in November 2025

BIS issued a final rule suspending the Affiliates Rule for one year from 10 November 2025 through 9

November 2026. As at the date of this Offering Circular neither the Issuer nor the Company holds any

equity interest in or is held by CNOOC Limited. However it is possible that the U.S. government might

decide to enforce the Affiliates Rule after 9 November 2026 or further tighten the restrictions in relation to

the Entity List or other applicable export regulations which may have further adverse impact on the business

of CNOOC Limited and the Company’s business operations and financial performance.The Company’s business requires it to make significant capital expenditures and the execution of the

Company’s capital expenditure plans is subject to uncertainty.As an offshore oilfield services company the Company owns and operates a large fleet of drilling rigs and

marine support and transportation vessels. The Company also invests in various high-technology instruments

and equipment. The Company’s competitiveness depends on part of its ability to make large capital

expenditures to purchase new drilling rigs and marine support and transportation vessels and to modify

refurbish and upgrade the Company’s existing fleet. The Company generally formulates and updates its

capital expenditure and investment plans on an annual basis. These plans are based on the condition of the

Company’s rigs vessels and other equipment its projected cash flows and the anticipated demand for the

Company’s oilfield services and products. The Company’s capital expenditure plans however are subject to

a number of factors some of which are beyond the Company’s control including the Company’s ability to

generate sufficient cash flows from the Company’s operations and the availability and terms of external

financing. If the Company is unable to obtain acceptable financing to fund necessary capital expenditures in

the future the results of its operations and its financial condition could be adversely affected.The Company’s capital expenditures were RMB4079.2 million RMB9746.0 million RMB7320.4 million

RMB2555.2 million and RMB2521.0 million in 2022 2023 2024 and in the first half of 2024 and 2025

respectively primarily for the purchase of drilling rigs the transformation and renovation of equipment and

the special inspection of drilling rigs under the drilling services segment for the construction and purchase

of well technology services equipment under the well services segment for the transformation and

–– 15 ––renovation of vessels under the marine support services segment and for the transformation and renovation

of operation vessels and equipment under geophysical acquisition and surveying services segment. The

Company expects its capital expenditures for 2025 to be approximately RMB7.2 billion which will be

mainly used for equipment investment and upgrades technical equipment renewal investment in technology

research and development and infrastructure development. These ongoing projects are subject to delays and

cost overruns inherent in large constructions and refurbishment projects including shipyard availability

shortages of materials or skilled labour unforeseen engineering problems work stoppages weather

interference unavailability of necessary equipment and the inability to obtain any required permits or

approvals. Significant cost overruns or delays could adversely affect the Company’s financial condition and

results of operations. There can be no assurance that such cost overrun incidents will not occur in the future.Significant delays could also adversely affect the Company’s marketing plan and jeopardise the short-term

and long-term contracts under which the Company plans to operate its drilling rigs and vessels. In addition

construction of a new offshore support vessel typically takes over one year during which time market

conditions and customer requirements may change. Such circumstances could affect the marketability of the

Company’s newly-built vessels.The Company’s operations rely heavily on high-tech equipment and technology that are subject to rapid

and significant change and the Company’s equipment may become obsolete.The development of equipment and technologies used in offshore oilfield services has been characterised by

rapid technological advancements in recent years and the Company expects this trend to continue. The

Company’s success depends to a significant extent upon its ability to obtain and apply new and enhanced

products and services on a cost-effective and timely basis in accordance with industry demands. The

development of equipment and technologies becomes particularly important as the Company expands into

new regions with more challenging working conditions for example deep-water. While the Company

commits substantial resources to research and development the Company may encounter resource

constraints or technical or other difficulties that could delay the introduction or application of new and

enhanced products and services in the future. In particular there exist certain technological gaps between

products and services the Company can offer and those of the Company’s international competitors. The

Company may not be successful in developing and deploying new technology in a manner that is

commercially viable and those technologies and equipment unique to the Company may not perform as the

Company anticipates. In addition the continuing development of new equipment or technology may make

the Company’s older equipment or technology obsolete. New and enhanced products and services if

introduced may not gain market acceptance and may be adversely affected by technological changes or

products or services introduced by the Company’s competitors. Moreover some of these technologies are

controlled by the Company’s competitors. These competitors may attempt to restrict the Company’s use of

any technology that they sell or license to the Company. If the Company is unable to develop or acquire

technology that enables it to remain competitive in the markets in which it operates the Company’s results

of operations and financial condition could be adversely affected.The Company may encounter unexpected difficulties in implementing its strategy to enter into or continue

to develop offshore oilfield services markets outside China.The Company has been actively expanding its business to offshore oilfield markets outside the PRC. In

particular the Company has expanded its business in Southeast Asia Australia Middle East Europe

Americas and Africa. Many of the Company’s competitors in overseas markets are large multinational

companies that possess significantly greater resources and experience operating in the relevant regions than

the Company does. Moreover the Company is entering into markets later than some of its competitors

which may require it to commit substantial capital resources to gain market share. In addition international

markets involve operating environments different from those in which the Company customarily operates in

offshore China. Therefore the Company’s experiences which have been proven to be successful in offshore

China may not be applicable to its overseas operations; as a result of which the Company may need to

–– 16 ––commit a substantial amount of capital expenditure which could challenge its ability of continuing to

provide services at low costs. For instance different from the Company’s operations in offshore China

where the Company manages to offer IPM business model to CNOOC the dominant oil and gas company in

offshore China the Company may have to serve multiple clients for one project or may only be able to

contract for a portion of a service portfolio for one project in overseas markets. Therefore the Company’s

cost-saving measures associated with IPM method may not be applicable in its overseas operations.The success of the Company’s overseas strategy is also subject to risks inherent in international operations

including without limitation instability of foreign economies and political environment which can cause

investment in projects by the Company’s customers to be withdrawn or delayed reducing or eliminating the

viability of the Company’s business; boycotts and embargoes that may be imposed by the international

community; requirements of local ownership of operations and requirements to use local suppliers

subcontractors or employees; risks of war uprisings riots terrorism and civil disturbance which can make

it unsafe to continue operations adversely affecting the Company’s budgets and schedules and exposing the

Company to losses; risk of piracy which may result in the delay or termination of customer contracts in

affected areas; seizure expropriation or nationalisation of assets or renegotiation or nullification of existing

contracts; foreign exchange restrictions import/export restrictions sanctions and other laws and policies

affecting tax trade and investment; restrictions on currency repatriation or the imposition of new laws or

regulations that preclude or restrict the conversion and free flow of currencies; unfavourable changes in tax

or other laws including the imposition of new laws or regulations that restrict operations or increase the cost

of operations; delay in the issuance or cancellation of licences or permits; work stoppages; ability to build

customers bases and compete successfully in new markets; availability of suitable personnel and equipment

which can be affected by government policy or changes in policy which limit the importation of qualified

crew members or specialised equipment in areas where local resources are insufficient; and recentgeopolitical tensions. See “Risk Factors – Risks Relating to the Company’s Industry – Economic uncertaintyand the volatility of oil and gas prices could have a material adverse effect on the Company’s financialcondition results of operations and prospects.”

For instance local laws or policies may require oil and gas companies to favour companies that are

majority-owned by local nationals. Such laws and policies may cause the Company to rely on joint ventures

licensing agency agreements or other business arrangements with local nationals in these countries. In

addition many overseas governments including Indonesia have implemented strict rules requesting the

local suppliers subcontracts and employees used in projects located in its jurisdiction shall be no less than a

certain percentage. There is no assurance that they will not increase such benchmark percentages. Failure to

meet these requirements could impose severe penalties on the Company. In addition the Company could

incur capital or operating costs beyond those currently anticipated for the compliance to these laws and

regulations. The adoption of laws and regulations that directly or indirectly curtail exploration by oil and gas

companies could also materially and adversely affect the Company’s operations by reducing the demand for

its products and services.Furthermore the Company has operations and assets in various regions including the North Sea Southeast

Asia and Middle East. Certain countries in these regions are deemed to exhibit a high degree of political

risk. The Company also faces the risks of kidnapping damage to property and business interruption caused

by terrorism activities and strikes.There can be no assurance that the Company will not be subject to material adverse developments with

respect to its operations. In the event of occurrence of any of the circumstances discussed above the

Company’s overseas expansions or operations and the Company’s results of operations and financial

condition could be adversely affected.–– 17 ––The Company’s businesses are subject to risks related to extreme weather operational risks and other

hazardous conditions that may not be fully covered by its insurance policies.The Company’s offshore oilfield services are exposed to extreme weather and other hazardous conditions. In

particular a substantial portion of the Company’s operations are subject to perils that are customary for

offshore oilfield operations including capsizing grounding collision interruption and damage or loss from

severe weather conditions fire explosions and environmental contamination from spillage. Any of these

risks could result in damage to or destruction of vessels or equipment personal injury property damage

suspension of operations or environmental damage.In addition the Company’s operations involve risks of a technical and operational nature due to the complex

systems that the Company utilises. The operational risks that the Company most commonly faces in its

drilling operations include loss or damage to drilling equipment riser ruptures spills fires explosions

encountering formations with abnormal pressures blowouts cratering and natural disasters. The Company

also faces risks associated with raising and lowering the legs of jack-up rigs ballasting semi-submersible

drilling rigs and drilling into high-pressure formations. In the Company’s marine support and transportation

operations the risks the Company most commonly faces include groundings collision and damage from

severe weather conditions.Any of these events could result in costly delays or cancellations of operations serious damage to or

destruction of equipment personal injury or loss of life property damage suspension of operations or

substantial environmental damage through oil spillage or extensive uncontrolled fires. The Company’s

business could be interrupted and the Company could incur significant liabilities. In addition many similar

risks may result in curtailment or cancellation of or delays in exploration and production activities of the

Company’s customers which could in turn adversely impact the Company’s operational and financial

condition. The Company’s insurance covers only some of the risks that the Company faces and may not be

sufficient to cover all of the Company’s potential losses or liabilities. The Company does not maintain

business interruption insurance for any of its business lines.Moreover in response to fluctuations in oil and gas prices and decline in the value of the vessels insurance

rates have been increasing and some forms of insurance may become entirely unavailable or economically

acceptable. Reductions in coverage changes in the insurance policies and accidents affecting the Company’s

industry may result in further increases in the Company’s costs and reduced activity levels in certain

markets. Any of these events may have an adverse impact on the Company’s operational results and

financial position. For further information see “Business of the Group – Insurance”.The Company has significant carrying amounts of long-lived assets that are subject to impairment testing.As at 30 June 2025 the carrying amount of the Company’s fixed assets including property plant and

equipment was approximately RMB49671.9 million representing approximately 59.2% of the Company’s

total assets. In accordance with the applicable accounting rules and the Company’s accounting policies the

Company reviews its fixed assets for impairment when changes in circumstances indicate that the carrying

amounts of these assets may not be recoverable. For the years ended 31 December 2022 2023 2024 and for

the six months ended 30 June 2024 and 2025 the Company recorded an impairment of fixed assets of

RMB30.2 million nil nil nil and RMB82.0 million respectively. There is no assurance that further

impairment losses will not be recorded.In addition the Company’s industry has historically been cyclical and is impacted by oil and gas price levels

and volatility. There have been periods of high demand short rig supply and high day rates followed by

periods of low demand excess rig supply and low day rates. Changes in commodity prices can have a

dramatic effect on rig demand and periods of excess rig supply intensify the competition in the industry and

often result in rigs being idle for long periods of time. The Company has previously experienced weakness

–– 18 ––in market demand for the Company’s products and services as a result of the global economic recession.Additionally political uncertainties may develop in jurisdictions in which the Company operates and may

cause it to suspend and/or exit its operations in such jurisdictions. Furthermore the Company may be subject

to greater risks of underutilisation of its assets in its overseas operations given that the consumption patterns

of the Company’s various international customers may be less predictable and more difficult to coordinate.The substantially greater competition in the overseas markets also makes it difficult for the Company to

develop and retain its client bases. There can be no assurance that the Company will not in the future idle

or suspend additional rigs or enter into contracts with lower day rates in response to unfavourable political

or market conditions.During prior periods of high utilisation and day rates industry participants have increased the supply of rigs

and other equipment by ordering the construction of new units. This has typically resulted in an oversupply

of drilling units and has caused a subsequent decline in utilisation and day rates sometimes for extended

periods of time. There are numerous high specification rigs and jack-ups under contract for construction.The entry into service of these new units will increase supply and could curtail a strengthening or trigger a

reduction in day rates as these rigs are absorbed into the active fleet. Any further increase in construction of

new drilling units and other equipment would likely exacerbate the negative impact on utilisation and day

rates. Lower utilisation and day rates could adversely affect the Company’s revenues and profitability.Prolonged periods of low utilisation and day rates could also result in the recognition of impairment charges

on certain classes of the Company’s drilling rigs if future cash flow estimates based upon information

available to management at the time indicate that the carrying values of these rigs or other intangible assets

may not be recoverable.The Company has a substantial amount of debt and cannot guarantee that it will be able to obtain future

financing.As at 30 June 2025 the Company’s total liabilities was RMB38545.0 million and for the six months ended

30 June 2024 and 2025 the Company’s cash and cash equivalents was RMB8037.5 million and

RMB7108.0 million. The Company’s indebtedness primarily consists of borrowings domestic RMB

denominated corporate bonds issued by the Company and U.S. dollar denominated senior unsecured bonds

issued by the Company’s subsidiaries. For details see “Capitalisation and Indebtedness”. The substantial

level of the Company’s indebtedness could have significant adverse effects on the Company’s results of

operations financial conditions and future prospects including the following:

* the Company may not be able to obtain financing in the future for working capital capital

expenditures acquisitions debt service requirements or other purposes;

* the Company may not be able to use operating cash flow in other areas of its business because it must

dedicate a substantial portion of these funds to service the debt;

* the Company could become more vulnerable to general adverse economic and industry conditions

including increases in interest rates particularly given its substantial indebtedness some of which

bears interest at variable rates;

* the Company may not be able to meet financial ratios or satisfy certain other conditions included in

its bank credit agreements due to market conditions or other events beyond its control which could

result in the Company’s inability to meet requirements for borrowings under its facility agreements or

a default under these agreements and trigger cross default provisions in the Company’s other debt

instruments;

–– 19 ––* less levered competitors could have a competitive advantage because they have lower debt service

requirements; and

* the Company may be less able to take advantage of significant business opportunities and to react to

changes in market or industry conditions than its competitors.The Company’s operations are subject to seasonal variations.The Company’s oilfield services are affected by seasonal variations. In particular as for China offshore

operations winter weather frequently limits the Company’s operations in parts of the Bohai Bay from

around October to March. In addition the Company’s activities are occasionally affected by typhoons from

around June to November. Similarly for the Company’s operations overseas the convective weather at the

Indonesia Sea may at times impact the Company’s operations in that area. From time to time hurricanes

typhoons and severe weather impact the Company’s operations. These storms and associated threats reduce

the number of days on which the Company and its customers operate which results in lower revenues than

the Company otherwise would have achieved. The Company cannot predict the impact of seasonal variations

on its operating results in any given year. Such impact could be material on the Company’s financial

condition results of operations and prospects.Potential investors should not place undue reliance on the Company’s unaudited and unreviewed

financial information or the discussion of material financial trends in relation to the Company’s

unaudited and unreviewed financial information as at and for the nine months ended 30 September 2025.This Offering Circular contains certain discussion of material financial trends as at and for the nine months

ended 30 September 2025. Such unaudited and unreviewed financial information as at and for the nine

months ended 30 September 2025 is not included in and does not form part of this Offering Circular.The unaudited and unreviewed financial information as at and for the nine months ended 30 September 2025

has not been audited or reviewed by Ernst & Young. Such financial information and the discussion of

material financial trends in relation to such financial information should not be relied upon by investors to

provide the same quality of information associated with information that has been subject to an audit or

review. Potential investors must exercise caution when considering such material financial trends and

evaluating the Company’s financial condition and results of operations.The Company’s acquisition activities expose it to various risks.As part of its business strategy the Company has pursued and may continue to pursue acquisitions of

complementary assets and businesses. There can be no assurance that the Company will be able to identify

additional suitable acquisition opportunities negotiate acceptable terms or successfully acquire identified targets.The Company’s acquisition strategy involves inherent risks including:

* unanticipated costs and assumption of liabilities and exposure to unforeseen liabilities of acquired

businesses including but not limited to environmental liabilities;

* difficulties in integrating the operations and assets of the acquired business and the acquired

personnel;

* limitations on the Company’s ability to properly assess and maintain an effective internal control

environment over an acquired business in order to comply with applicable periodic reporting

requirements;

–– 20 ––* potential losses of key employees and customers of the acquired businesses;

* risks of entering markets in which the Company has limited prior experience; and increases in the

Company’s expenses and working capital requirements.The process of integrating an acquired business may involve unforeseen costs and delays or other

operational technical and financial difficulties that may require a disproportionate amount of management

attention and financial and other resources. The Company’s failure to achieve consolidation savings realise

the expected synergy effect successfully incorporate the acquired businesses and assets into the Company’s

existing operations or minimise any unforeseen operational difficulties could have a material adverse effect

on the Company’s financial condition and results of operations.In addition the Company may not have sufficient capital resources to complete additional acquisitions in the

future. The Company may incur substantial additional indebtedness to finance future acquisitions and also

may issue equity securities or debt securities in connection with such acquisitions. Debt service requirements

could represent a significant burden on the Company’s results of operations and financial condition and the

incurrence of additional debt may impact the Company’s ability to repay the Company’s existing

Noteholders. Furthermore the Company may not be able to obtain additional financing on satisfactory

terms.Violations of anti-fraud anti-corruption and corporate governance laws may expose the Company to

various risks.Laws and regulations of the host countries or regions in which the Company operates such as laws on anti-

corruption anti-fraud and corporate governance are constantly changing and becoming more

comprehensive especially in the United States the United Kingdom Canada Australia and China. The

compliance with these laws and regulations may increase the Company’s cost. If the Company the

Company’s directors executives or employees fail to comply with any of such laws and regulations it may

expose the Company to prosecution or punishment damage to the Company’s reputation and image and the

Company’s ability to obtain new resources and/or access to the capital markets and it may even expose the

Company to civil or criminal liabilities.Potential changes in the U.S. sanctions regime could result in negative media and investor attention and

possible sanctions imposed on the Company due to the Company’s or its affiliates’ activities in certain

countries or regions which could materially and adversely affect the Company’s financial condition and

results of operations.Different levels of the U.S. government impose economic sanctions of varying severity against certain

geographical areas and their populations or against designated governments organisations individuals and

entities wherever located. The Company currently does not carry out any sanctioned activities in the

countries that are the subject of comprehensive U.S. sanctions. It is possible that the operation or business of

the Company or its affiliates or counterparties or the countries or regions in which the Company or its

affiliates or counterparties have operations or business could become the subject of such U.S. sanctions in

the future due to changes in the U.S. sanctions regime or the Company’s future business activities. Pleasesee “Risk Factors – Risks Relating to the Company’s Business – Certain affiliates of the Company havebeen included on lists maintained by U.S. authorities some of which the Company has ongoing dealingswith.” The Company could be prohibited from engaging in business activities in the United States or with

U.S. individuals or entities or become subject to sanctions or enforcement actions. The Company may also

be subject to negative media or investor attention which may distract management consume internal

resources and affect investors’ perception of the Company and investment in the Company.–– 21 ––Unexpected cost overruns and delays on the Company’s turnkey projects could adversely affect the

Company’s financial condition and results of operations.The Company has historically derived a portion of its revenues from turnkey contracts where the

Company’s work is delivered at a predetermined fixed price. While most of the Company’s contracts are

fixed rate contracts the Company expects turnkey contracts will continue to represent a component of its

future revenues. In submitting a bid on a turnkey contract the Company estimates its costs associated with

the project. For example under a typical turnkey drilling contract the Company agrees to drill a well for its

customer to a specified depth and under certain conditions for a fixed price. However the Company’s actual

costs can vary from its estimated costs because of changes in assumed operating conditions exchange rates

and equipment productivity among others. In addition the Company may bid too low as a result of market

pricing pressure. As a result the Company may experience reduced profitability or losses on projects if its

bids on turnkey contracts are too low and/or actual costs exceed estimated costs. Moreover unexpected

changes in weather interference from other vessels and other operating disturbances could also give rise to

delays which could adversely affect the Company’s financial condition and results of operations.Although the Company attempts to obtain insurance coverage to reduce certain risks inherent in the

Company’s turnkey projects adequate coverage may be unavailable and the Company might have to bear

certain risks which could have an adverse effect on the Company’s financial condition and results of

operations.Customer credit risks could result in losses.The concentration of the Company’s customers may expose the Company to credit risks of its customers

who may be affected by the prolonged economic downturn. The Company is also exposed to credit risks of

its customers that are small and medium-size oil companies. Many of the Company’s customers source a

substantial portion of their revenue from the sale of oil or gas which would be negatively impacted by a

drop in commodity prices or during an economic recession. Further laws and turbulence in some

jurisdictions in which the Company operates could make collection from relevant clients difficult or time

consuming. The Company performs ongoing credit evaluations of its customers and does not generally

require collateral to support its trade receivables. While the Company maintains reserves for potential credit

losses there can be no assurance that such reserves will be sufficient to meet write-offs of uncollectible

receivables or that the Company’s losses from such receivables will be consistent with its expectations.The Company could be adversely affected if shortages of equipment or supplies occur.From time to time there have been shortages of oilfield services equipment and supplies during periods of

high demand. Shortages could result in increased prices for oilfield services equipment or supplies that the

Company may not be able to pass on to customers. In addition during periods of shortages the delivery

times for relevant equipment and supplies can be substantially longer. Any significant delays in the

Company obtaining oilfield services equipment or supplies could limit the Company’s operations and

jeopardise its relationship with customers. In addition shortages of oilfield services equipment and supplies

could delay and adversely affect the Company’s ability to obtain new contracts which could have adverse

effect on its financial condition and results of operations.Actions of and disputes with the Company’s joint venture partners could have a material adverse effect on

the business of the Company’s joint ventures.The Company conducts some operations through joint ventures where control may be shared with

unaffiliated third parties. As with any joint venture arrangements differences in views among the joint

venture participants may result in delayed decisions or failure to reach an agreement on major issues.–– 22 ––The Company also cannot control the actions of its joint venture partners including any defaults or

bankruptcies of its joint venture partners. These factors could have a material adverse effect on the business

and results of operations of the Company’s joint ventures and in turn the Company’s own business and

consolidated results of operations.The Company is dependent upon subcontractors and other third parties for various services and products

in its business.The Company subcontracts portions of its oilfield services to independent third-party subcontractors to meet

the needs of the Company’s clients. In particular if the Company requires extra manpower due to a shortage

of labour or in order to accelerate the progress of work it may need to subcontract labour services hire

short-term temporary workers or engage independent third-party subcontractors. The Company also relies

on third-party manufacturers or other service providers for well services and marine support services.Outsourcing to subcontractors and other third parties supplements the Company’s capacity reduces the

Company’s need to employ a large workforce including skilled and semi-skilled labour in different

specialised areas and increases the Company’s flexibility and cost effectiveness in carrying out the

Company’s contracts. The Company has established a system with respect to the selection and control of

subcontractors in its offshore oilfield services business which involves among others maintaining a

regularly updated list of qualified subcontractors and entering into agreements with them to set forth each

party’s rights and obligations. Nevertheless the Company may not be able to monitor the performance of

these subcontractors and other third parties as directly and efficiently as the Company’s own staff. In

addition qualified subcontractors and other third parties may not always be readily available when the

Company’s needs for outsourcing arise. If the Company is unable to hire qualified subcontractors and other

third parties its ability to complete projects or other contracts could be impaired. If the amounts that the

Company is required to pay to subcontractors and other third parties exceed what the Company has

estimated especially in the case of contracts with a pre-agreed price the Company may suffer losses on

those contracts. Outsourcing also exposes the Company to risks associated with non-performance delayed

performance or substandard performance by subcontractors or other third parties. As a result the Company

may experience deterioration in the quality or late delivery of its services incur additional costs due to

delays or higher prices in sourcing the services equipment or supplies or be subject to liability under the

relevant contract for the non-performance delayed performance or substandard performance of the

Company’s subcontractors or other third parties. Such events could have a material and adverse impact upon

the Company’s profitability financial performance and reputation and may result in litigation or damage

claims against the Company.The Company’s operating and maintenance costs may not fluctuate in proportion to changes in operating

revenues.The Company’s operating and maintenance costs may not necessarily fluctuate in proportion to changes in

operating revenues. The Company’s operating revenues may fluctuate as a function of changes in day rates.However costs for operating a rig as well as other fixed costs including depreciation and maintenance

expenses associated with the Company’s rigs well work-over system and fleet are generally fixed or only

semi-variable regardless of the day rates being earned.Extended periods of significant unanticipated downtime or low productivity caused by reduced demand

weather interruptions equipment failures permit delays or other causes could reduce the Company’s

profitability and have a material adverse effect on the Company’s financial condition and results of

operations because the Company will not be able to reduce its operating and maintenance costs in a short

period of time. For instance should the Company’s rigs incur idle time between contracts the Company

typically will not reduce the staff on those rigs because the Company will use the crew to prepare the rig for

its next contract. During times of reduced activity reductions in costs may not be immediate as portions of

the crew may be required to prepare rigs for stacking after which time the crew members are assigned to

–– 23 ––active rigs or dismissed. In addition as the Company’s rigs are mobilised from one geographic location to

another the labour and other operating and maintenance costs can vary significantly. In general labour costs

might increase primarily due to higher salary levels and inflation. Labour cost increases in China have been

and will probably continue to exert upwards pressures on the Company’s operating costs. In addition as the

Company moves into the more competitive international arena the competition for qualified talents will be

more intense which will further drive up the Company’s staff costs. Equipment maintenance expenses

fluctuate depending upon the type of activity the unit is performing and the age and condition of the

equipment. Contract preparation expenses vary based on the scope and length of contract preparation

required and the duration of the firm contractual period over which such expenditures are amortised.The Company may be subject to legal or regulatory proceedings.The Company may be involved from time to time in legal or regulatory proceedings arising in the ordinary

course of its operations. Litigation arising from any failure injury or damage from the Company’s

operations may result in the relevant member of the Company being named as defendant in lawsuits

asserting large claims against such member of the Company or subject such member of the Company to

significant regulatory penalties. It may be difficult to assess or quantify these risks and their existence and

magnitude often remain unknown for a substantial period of time. Actions brought against the Company may

result in settlements injunctions fines penalties or other sanctions adverse to the Company’s reputation

financial condition and results of operations. Even if the Company is successful in defending against these

actions the costs associated with the Company’s defence may be significant. A significant judgment

arbitration award or regulatory action against the Company or a disruption in the Company’s business

arising from adverse adjudications in proceedings against the Company’s director(s) senior management or

key employees would materially and adversely affect the Company’s liquidity business financial condition

reputation results of operations and prospects.In addition the Company may have disagreements with regulatory bodies in the course of its operations

which may subject it to administrative proceedings and unfavourable decrees that result in liabilities. Also

in the event that the Company makes any other investments or acquisitions in the future there can be no

assurance that the Company would not have any exposure to any litigation or arbitration proceedings orother liabilities relating to the acquired businesses or entities. See “Business of the Group – LegalProceedings” for further information.The Company’s results of operations may be affected by currency fluctuations.The Company is subject to foreign currency exchange rate risk on cash flows related to sales expenses

financing and investment transactions in currencies other than RMB. The Company predominantly sells its

products and services in RMB but to a less extent the Company also realises revenue based on other

currencies. While the majority of the Company’s operating expenses are incurred in RMB the significant

portion of its operating expenses for overseas operations is incurred in U.S. dollars Indonesian rupiah and

Norway Kroner. A portion of the Company’s RMB revenues must be converted into other currencies to meet

the Company’s foreign currency obligations. The existing foreign exchange limitations under the PRC laws

and regulations could affect the Company’s ability to obtain foreign currency through debt financing or to

obtain foreign currency for capital expenditures.On 21 July 2005 the PRC government reformed its exchange rate regime by adopting a managed floating

exchange rate regime based on market supply and demand. Under this regime the Renminbi is no longer

pegged to the U.S. dollar but is permitted to fluctuate within a narrow and managed band with reference to a

portfolio of currencies. On 11 August 2015 the PBOC adjusted the mechanism for market makers to form

the central parity rate by requiring them to consider the closing exchange rate of the last trading date the

supply and demand of foreign exchange and the change of rate of the primary international currencies. For

three consecutive days commencing 11 August 2015 PBOC devalued the Renminbi against the U.S. dollar

–– 24 ––leading to declines in the value of the Renminbi versus the U.S. dollars of up to 2.8% in currency markets

which was also the largest single-day drop in the value of the Renminbi since 1994. On 11 December 2015

the China Foreign Exchange Trade System (the “CFETS”) a sub-institutional organisation of PBOC

published the CFETS Renminbi exchange rate index for the first time which weighs the Renminbi based on

13 currencies to guide the market in order to measure the Renminbi exchange rate from a new perspective.

Throughout 2016 the Renminbi experienced further fluctuation in value against the U.S. dollar. Following

the gradual appreciation of Renminbi in 2017 Renminbi experienced a depreciation in value against U.S.dollar following a fluctuation in 2018 and 2019. On 5 August 2019 the PBOC set the Renminbi’s daily

reference rate above 7 per U.S. dollar for the first time in over a decade amidst an uncertain trade and global

economic climate. Since June 2020 Renminbi has been experiencing another round of appreciation against

U.S. dollar. However as at 31 August 2023 the Renminbi was around 4.2 per cent. weaker against the U.S.dollar than it was a year ago. By the end of 2024 Renminbi has been experiencing depreciation against U.S.dollar and China is contending with a weakening Renminbi in anticipation of U.S. president Donald Trump

following through with his tariff threats. The CNY/USD exchange rate is expected to face depreciation

pressure in 2025. With an increased floating range of the Renminbi’s value against foreign currencies and a

more market oriented mechanism for determining the mid-point exchange rates the Renminbi may further

appreciate or depreciate significantly in value against the U.S. dollar or other foreign currencies in the long-

term. There remains significant international pressure on the PRC government to adopt a more flexible

currency policy which could result in further and more significant appreciation of the Renminbi against the

U.S. dollar. The Company cannot provide any assurance that the Renminbi will not experience significant

appreciation against the U.S. dollar in the future. Any significant decrease in the value of the Renminbi

against foreign currencies could increase the value of the Company’s foreign currency-denominated

expenses and liabilities.The PRC government may adopt further reforms of its exchange rate system including making the

Renminbi freely convertible in the future. If such reforms were implemented and resulted in devaluation of

the Renminbi against the U.S. dollar the Company’s financial condition and results of operations could be

adversely affected because of the Company’s U.S. dollar denominated indebtedness and other obligations.Such a devaluation could also adversely affect the value translated or converted into U.S. dollars or

otherwise of the Company’s earnings and the Company’s ability to satisfy the Company’s obligations under

the indebtedness denominated in foreign currencies.In addition the Company has not entered into any hedging transactions in anticipation of reducing its

exposure to foreign currency risk. The Company cannot predict the effect of future exchange rate

fluctuations on its operating results.The Company is a multinational organisation subject to taxation in many jurisdictions.As a multinational organisation the Company is subject to taxation in many jurisdictions around the world

with increasingly complex tax laws. The amount of taxes the Company pays in these jurisdictions could

increase substantially as a result of changes in these laws or their interpretations by the relevant tax

authorities which could have a material adverse effect on the Company’s liquidity and results of operations.In addition those authorities could review the Company’s tax returns and impose additional taxes and

penalties which could be material. There may be in the future claims from tax authorities for unpaid tax

amounts as well additional tax issues that the Company is currently not aware of. In addition the Company

enjoyed a preferential income tax rate of 15% in China as the Company was certified as a new and high

technology enterprise. Taxes in relation to the Company’s drilling activities in certain jurisdictions are

currently borne by the Company’s customers pursuant to the Company’s drilling contracts with them. The

Company’s operations in certain other jurisdictions are not subject to any income tax pursuant to the local

applicable laws. Any change in or termination of the preferential tax treatment and the tax arrangements

may result in a significant increase in the Company’s tax liability which would have a material adverse

effect on the Company’s business results of operations and financial condition.–– 25 ––The Company relies on qualified personnel and experienced senior management.To a significant extent the Company’s success is built upon the technical expertise and in-depth knowledge

of the oilfield services operations possessed by the Company’s management and certain other key personnel.The Company’s future growth and success will depend to a large extent on the Company’s ability to recruit

and retain qualified individuals to strengthen the Company’s management operation and research teams.The high-end jack-up and semi-submersible drilling rigs the Company owns require skilful technicians to operate

and the Company’s international operations require experienced executives to manage. Due to the intensive

competition for highly skilled workers and experienced senior management the Company may face

difficulties recruiting experienced and skilled personnel. Accordingly if any of the Company’s management or

key personnel ceases to be involved in the Company’s operations or if any of them fail to observe and perform

their obligations under their respective service agreements the implementation of the Company’s business

strategies may be affected which could lead to a material adverse impact on the Company’s operations. In

addition a general shortage of qualified personnel and generally higher compensation offered by

international firms in the Company’s markets may also require the Company to raise employee salaries

and benefits which could affect the Company’s profitability.The Company is dependent on the supply of qualified labour including foreign labour and the Company

may face labour shortages. In addition the Company’s profitability and prospects may be affected by the

increase in labour costs.The Company is dependent on the availability of labour including foreign labour. The Company’s

businesses are labour intensive and the Company may experience difficulty in attracting/obtaining and

retaining sufficient numbers of employees to work in the Company’s offshore oilfield services bases. As at

30 June 2025 the Company had 15270 in-service employees 2015 of whom were foreign employees. Of

the total workforce overseas 819 are sent from the PRC representing approximately 29% of the Company’s

total workforce overseas. The Company’s employees are employed on a contractual basis.Any change in government policies which imposes additional conditions for the entry of foreign labour

(including labour from the PRC) to countries in which the Company operates will decrease the number of

labour available for employment by the Company and this may affect the Company’s businesses and

operations. There is also no assurance that the cost of labour whether local or foreign will not increase or

that the Company will be able to offset such increase in labour cost against corresponding increase in the

prices of the Company’s products and services. If the Company is unable to pass on increasing labour costs

to its customers the Company’s profitability financial condition and results of operations may be adversely

affected.The Company’s contracts may be suspended or terminated due to a number of events.Certain of the Company’s contracts with customers may be suspended or cancelled at the option of the

relevant customers upon payment of a discounted operation rate or an early termination fee. Such payments

may not however fully compensate the Company for the suspension or loss of the contract. In particular

the Company’s drilling contracts customarily provide for either automatic termination or termination at the

option of the relevant customer typically without the payment of any termination fee under certain

circumstances such as the Company’s non-performance as a result of downtime or impaired performance

caused by equipment or operational issues or sustained periods of downtime due to force majeure events.Many of these events are beyond the Company’s control.During periods of depressed market conditions the Company is subject to an increased risk of its customers

seeking to suspend or repudiate their contracts including through claims of non-performance. The

Company’s customers’ ability to perform their obligations under their contracts with the Company may also

be negatively impacted by the economic downturn. If the Company’s customers cancel some of the

–– 26 ––Company’s contracts and the Company is unable to secure new contracts on a timely basis and on

substantially similar terms or if contracts are suspended for an extended period of time or if a number of the

Company’s contracts are renegotiated it could adversely affect the Company’s financial position results of

operations or cash flows.As the Company’s controlling shareholder CNOOC will continue to have substantial influence over the

Company.As at 30 June 2025 CNOOC was the Company’s controlling shareholder and beneficially owned

approximately 50.86% of the Company’s issued share capital. As a result CNOOC is in a position to

influence the Company’s policies and affairs and to influence the outcome of corporate actions requiring

shareholder approval. If CNOOC takes action that favours its interests over the Company’s the Company’s

results of operations and financial position may be adversely affected. Subject to the relevant provisions of

the Company’s Articles of Association as well as the PRC Company Law and the Listing Rules CNOOC

may seek to influence the Company’s dividend pay-outs. Any increase in dividend distribution as a result of

this pressure could reduce funds available to the Company for reinvestment purposes and adversely affect

the Company’s results of operations and financial condition.Risks Relating to the PRC

PRC economic political and social conditions as well as governmental policies could affect the

Company’s business and prospects.The Company derives a substantial portion of its revenue from its sales in the PRC where the Company has

a leading market position in the oilfield services industry. Accordingly the Company’s business activities

financial condition results of operations and prospects are to a significant degree subject to the economic

political and legal developments in China. The PRC economy differs from the economies of most developed

countries in many aspects including:

* the amount and degree of the PRC government involvement;

* growth rate and degree of development;

* uniformity in the implementation and enforcement of laws;

* content of and control over capital investment;

* control of foreign exchange; and

* allocation of resources.The PRC economy has been transitioning from a centrally planned economy to a more market oriented

economy. For approximately three decades the PRC government has implemented economic reform

measures to utilise market forces in the development of the PRC economy. In addition the PRC government

continues to play a significant role in regulating industries and the economy through policy measures.The PRC economy is also exposed to material changes in global economic and political environments as

well as the performance of certain major developed economies in the world such as the United States. In

addition China’s economic growth may slow down due to weakened exports as well as recent developments

surrounding the trade tensions between China and the United States. In 2018 and 2019 the U.S. government

under the administration of President Donald J. Trump imposed several rounds of tariffs on Chinese

products. In retaliation the Chinese government responded with tariffs on U.S. products. Political tensions

–– 27 ––between the U.S. and China have further escalated due to among other things trade disputes and various

restrictions related to the Chinese semiconductor industry imposed by the U.S. government. Furthermore in

September 2024 the United States implemented tariff increases on certain goods and technologies imported

from China including electric vehicles chips battery technologies solar panels certain medical equipment

and other goods. In addition on 1 February 2025 President Trump issued an executive order imposing a

10% tariff on imports from China which was amended on 3 March 2025 raising tariffs on imports from

China to 20%. More recently on 2 April 2025 President Trump imposed an additional 34% tariff on all

imports from China which was subsequently increased to 125% on 9 April 2025. On 12 May 2025 the

United States and China agreed to drastically roll back tariffs on each other’s goods for an initial 90-day

period. On 12 August 2025 the United States and China further agreed to extend the tariff truce for another

90 days. It is uncertain if the United States may take further actions to eliminate perceived unfair

competitive advantages. These policies have adversely affected the global economy and financial markets

such as significant declines in the global stock markets. Although there have been positive signs of progress

on trade negotiations the roadmap to the comprehensive resolution remains unclear and the lasting impact

such trade disputes may have on China’s economy and the PRC oil and gas industry remains uncertain. Any

severe or prolonged slowdown or instability in the global or China’s economy may materially and adversely

affect our business financial condition and results of operations.The Company cannot predict whether changes in PRC economic political or social conditions and in PRC

laws regulations and policies will have any adverse effect on the Company’s current or future business

financial condition or results of operations.The national and regional economies may be adversely affected by natural disasters epidemics acts of

war and political unrest which are beyond the Company’s control and which may cause damage loss or

disruption to Company’s business.Natural disasters epidemics acts of war and political unrest which are beyond the Company’s control may

materially and adversely affect the economy of the regions in which we operate. Some areas in which we

operate are under the threat of cyclones earthquakes ice storms floods sandstorms droughts or other

natural disasters. For instance in May 2008 April 2010 and April 2013 high magnitude earthquakes

occurred in the Sichuan Province and the Qinghai Province.These disasters may cause significant casualties and loss of properties and any of the Company’s operations

in the affected areas could be adversely affected. If similar or other inclement weather or climatic conditions

or natural disasters occur the Company’s operations may be hampered which could adversely impact the

Company’s business results of operations and financial condition. In addition certain areas in which we

operate are susceptible to epidemics such as SARS H5N1 flu H7N9 flu H1N1 flu or COVID-2019.A recurrence of SARS or an outbreak of H5N1 flu H7N9 flu H1N1 flu COVID-2019 or any other

epidemics could result in material disruptions to the Company’s operations which in turn may materially

and adversely affect the Company’s business prospects financial condition and results of operations.Political unrest acts of war and terrorism may also disrupt the Company’s business and markets injure the

Company’s employees cause loss of lives or damage the Company’s properties any of which could

negatively impact Company’s sales costs overall financial condition and results of operations.The outlook for the world economy and financial markets remains uncertain. In Europe several countries are

facing difficulties in refinancing sovereign debt. In the United States the unemployment rate remains

relatively high. In Asia and other emerging markets some countries are expecting increasing inflationary

pressure as a consequence of liberal monetary policy or excessive foreign fund inflow and outflow or both.In Middle East Eastern Europe and Africa political unrest in various countries has resulted in economic

instability and uncertainty. Since 2023 in particular there has been significant uncertainty in the global

markets due to inter alia geopolitical tensions such as the Russian-Ukraine conflict (and the related

–– 28 ––sanctions and countersanctions) which have resulted in high inflation rising interest rates and high foreign

exchange rate volatility as well as caused disruptions in global supply chains. In addition the recent

escalation in the ongoing Israeli-Hamas and Israeli-Iranian conflicts have resulted in an increase in

geopolitical tensions in the region and may have far reaching effects on the global economy currency

exchange rates and regional economies. The long-term impacts of such geopolitical tensions on the global

economy are still unclear.The potential for wars or terrorist attacks may also cause uncertainty and cause the Company’s business to

suffer in ways that the Company cannot predict. The Company’s business prospects financial condition and

results of operations may as a result be materially and adversely affected.Changes in PRC laws and regulations could have an adverse effect on the Company’s operations.The Company’s operations and assets are mainly in the PRC. The Company is subject to various PRC

national and local laws and regulations in the areas in which the Company operates including exploring

developing producing pricing taxing importing exporting and allocating various resources. The Company

has benefited from various favourable PRC government policies laws and regulations that have been

enacted to encourage the development of the offshore oilfield services industry. The Company cannot

guarantee that the legal and fiscal regimes affecting its businesses will remain substantially unchanged or

that the Company will continue to benefit from favourable PRC government policies.Interpretation of PRC laws and regulations involves uncertainty and the current legal environment in

China could limit the legal protections available to any investor.The PRC legal system is a civil law system based on written statutes and prior court decisions have limited

precedential value and can only be used as a reference. Additionally PRC written laws are often principle-

oriented and require detailed interpretations by the enforcement bodies to further apply and enforce such

laws. Since 1979 the PRC legislature has promulgated laws and regulations in relation to economic matters

such as the issuance and trading of securities shareholder rights foreign investment corporate organisation

and governance commercial transactions taxation and trade with a view to developing a comprehensive

system of commercial law including laws relating to property ownership and development. However

because these laws and regulations continue to evolve and because of the limited volume of published cases

and the non-binding nature of prior court decisions interpretation of PRC laws and regulations involves a

degree of uncertainty and the legal protection available to any investor may be limited. As PRC

administrative and court authorities have significant discretion in interpreting and implementing statutory

and contractual terms it may be more difficult to evaluate the outcomes of administrative and court

proceedings and the level of legal protection the Company enjoys than in the legal system of certain

countries. The Company cannot predict the effect of future developments in the PRC legal system including

the promulgation of new laws changes to existing laws or the interpretation and enforcement thereof and

the pre-emption of local regulations by national laws. In addition any litigation in China may be protracted

and result in substantial costs and diversion of resources and management attention. All these uncertainties

may cause difficulties in the enforcement of the Company’s legal rights entitlements under the Company’s

permits and other statutory and contractual rights and interests.The Company cannot guarantee the accuracy of facts forecasts and other statistics with respect to China

the PRC economy and certain industries in the PRC contained in this Offering Circular.Facts forecasts and other statistics in this Offering Circular relating to China the PRC economy and the

industries in the PRC have been derived from various official or other publications available in China and

may not be consistent with other information compiled within or outside China. However the Company

cannot guarantee the quality or reliability of such source materials. They have not been prepared or

independently verified by the Company the Initial Purchasers the Trustee the Agents or any of the

–– 29 ––Company’s or their affiliates or advisors (including legal advisors) or other participants in this offering and

therefore the Company makes no representation as to the accuracy of such facts forecasts and statistics.Due to possibly flawed or ineffective collection methods or discrepancies between published information

and market practise these facts forecasts and statistics in this Offering Circular may be inaccurate or may

not be comparable to facts forecasts and statistics produced with respect to other economies. Further there

can be no assurance that these facts forecasts and statistics are stated or compiled on the same basis or with

the same degree of accuracy as in other jurisdictions. Therefore any prospective investor should not unduly

rely upon the facts forecasts and statistics with respect to China the PRC economy and the industries in the

PRC contained in this Offering Circular.Government regulation of currency conversion may adversely affect the Company’s operations and

financial condition.A portion of the Company’s RMB revenue may need to be converted into other currencies by the Company

to meet its substantial requirements for foreign currencies including debt service on foreign currency

denominated debt overseas acquisitions of oil and gas properties purchases of imported equipment and

payment of dividends declared in respect of shares held by international investors.Foreign exchange transactions under the capital account including principal payments with respect to

foreign currency denominated obligations are subject to the approval and/or registration requirements of the

SAFE. If SAFE does not approve and/or register the Company’s foreign exchange transactions when needed

or if the government regulation of currency conversion becomes more restrictive the Company’s business

operation may be adversely affected.Risks relating to the Notes and the Guarantee

Any failure to complete the relevant filings under the NDRC Measures or with the SAFE within the

prescribed time frame following the completion of the issuance of the Notes may have adverse

consequences for the Issuer and/or the investors of the Notes.The NDRC issued the NDRC Measures on 5 January 2023 which came into effect on 10 February 2023.According to the NDRC Measures domestic enterprises and their overseas controlled entities shall procure

the registration of any medium or long-term foreign debt securities with a maturity of more than one year

issued outside the PRC with the NDRC prior to the issue of the securities and notify the particulars of the

relevant issues within the relevant prescribed timeframe after the completion of the issue of the securities

(the “NDRC Post-issue Filing”). The Company has obtained the NDRC pre-issuance registration certificate

on 2 February 2026. The Guarantor will be required to complete the NDRC Post-issue Filing within the

prescribed time period after the Issue Date according to NDRC Measures and shall comply with regulations

regarding risk management and interim and ex-post supervision of the NDRC Administrative Measures and

any other rules and regulations promulgated by the NDRC in relation with the supervision and management

of foreign debt from time to time. For any enterprise failing to comply with post-issue filing requirements

under the NDRC Measures the NDRC will order such enterprise to take rectification actions within a

prescribed time limit; and if the circumstances are severe or the enterprise fails to take rectification action

within the prescribed time limit give a warning to the relevant enterprise and its principal liable person.Furthermore conducts in violation of the NDRC Measures committed by enterprises will be publicised on

among others the Credit China (信用中國 ) website and the National Enterprise Credit Information Publicity

System (國家企業信用信息公示系統).The Guarantor is also required to file with SAFE in accordance with and within the time period prescribed

by the Cross-border Security Registration. Such non-compliance with the post-issuance filing notification

requirement under the NDRC Measures and/or the SAFE filing may result in it being unlawful for the Issuer

and the Company to perform or comply with any of their respective obligations under the Notes and the

–– 30 ––Guarantee and the Notes might be subject to acceleration as provided in Condition 9 (Events of Default) of

the Terms and Conditions of the Notes. Further Non- compliance with the Cross-border Security

Registration may subject the Guarantor to administrative penalties under PRC law. Potential investors of the

Notes are advised to exercise due caution when making their investment decisions.Following the occurrence of a No Registration Event (as defined in the Trust Deed) the Noteholder of any

Note will have the right at such Noteholder’s option to require the Issuer to redeem all but not part of that

Noteholder’s Notes on the redemption date at their principal amount together with interest (if any) accrued

to but excluding the redemption date. If such an event were to occur the Issuer or the Company may not

have sufficient cash in hand and may not be able to arrange financing to redeem the Notes in time or on

acceptable terms or at all. There is also no assurance that the Issuer or the Company would have sufficient

liquidity at such time to make the required redemption of the Notes. The ability to redeem the Notes in such

event may also be limited by the terms of other debt instruments. The Issuer’s or our failure to repay

repurchase or redeem the Notes could constitute an Event of Default under the Notes which may also

constitute a default under the terms of the Issuer’s or our other indebtedness.In addition if the Company fails to complete the SAFE registration there may be logistical hurdles at the

time of remittance of funds (if any cross-border payment is to be made by the Company under the

Guarantee) as domestic banks may require evidence of the SAFE registration in connection with the

Guarantee in order to effect such remittance although this does not affect the validity of the Guarantee

itself.The Issuer has limited financial resources.The Issuer is an indirect offshore subsidiary of the Company. The Issuer does not conduct business or carry

out any other activities other than issuance and sale of bonds and the lending of the proceeds of the offering

to any company controlled directly or indirectly by the Company and any other activities in connection

therewith or related thereto. As of 31 December 2022 2023 and 2024 the Issuer recorded net liabilities as a

result of shortfalls between the interest and related financing income it received from other members of the

Group pursuant to intercompany loans and its financing costs. The Issuer does not and will not have any

material assets other than amounts due to it from the Company or its subsidiaries and its ability to make

payments under the Notes depends on receipt of timely remittances from the Company or its subsidiaries

from whom the amounts are due from. Accordingly the Issuer is dependent on the Company to provide

continuing financial support to enable it to operate as a going concern and to discharge its obligations as and

when they fall due. If the Issuer does not receive sufficient payment from the Company or its subsidiaries

when any amount is due from it as a result of any redemption (including redemption as described in the

Terms and Conditions of the Notes) the Issuer will not be able to fulfil its obligations under the Notes.The Company depends on distributions from its subsidiaries to meet its payment obligations and

provisions of applicable laws or contractual restrictions could limit the amount of such distributions.The Company derives a substantial portion of its operating income from its subsidiaries. As a result the

Company depends on distributions from its subsidiaries in order to meet its payment obligations. In general

these subsidiaries are separate and distinct legal entities and have no obligation to provide the Company with

funds for its payment obligations whether by dividends distributions loans or otherwise. In addition

provisions of applicable laws such as those limiting the legal sources of dividends limit the ability of the

Company’s subsidiaries to make payments or other distributions to it.The Company and its respective subsidiaries may incur significant additional secured or unsecured

indebtedness in the future and there can be no assurance that the Company will have sufficient cash flows

from its own operations and distributions by its subsidiaries and affiliates to satisfy its obligations in respect

of the Notes or the Guarantee as the case may be. Although the Company believes that it will be able to

–– 31 ––meet its obligations in respect of the Notes or the Guarantee as the case may be any shortfall would have to

be made up from other sources of cash such as a sale of investments or any financing available to the

Company.The Notes and the Guarantee are unsecured obligations.The Notes and the Guarantee are unsecured obligations of the Issuer and the Company respectively. The

Notes will be effectively subordinated to all of the Issuer’s existing and future debt that is secured by assets

that do not secure the Notes to the extent of the value of the assets securing such debt. The Guarantee will

be effectively subordinated to all of the Company’s existing and future debt that is secured by assets that do

not secure the Guarantee to the extent of the value of the assets securing such debt. The payment of the

principal and interest of the Notes and the payment under the Guarantee may be adversely affected if:

* the Issuer or the Company enters into bankruptcy liquidation reorganisation or other winding-up

proceedings; or

* there is a default in or acceleration of payment under the Issuer’s or the Company’s existing or future

secured indebtedness or other unsecured indebtedness.If any of these events were to occur Noteholders’ rights to receive payment pursuant to the Notes and the

Guarantee may be subordinated to those of the creditors of the Issuer or the Company as a result of rule of

law or secured priority in payment. There can be no assurance that the Issuer or the Company will have

sufficient cash to pay amounts due on the Notes after it satisfies the obligations due to other creditors.The Trustee may request Noteholders to provide an indemnity and/or security and/or pre-funding to its

satisfaction.In certain circumstances (including without limitation the giving of notice to the Issuer pursuant to

Condition 9 (Events of Default) of the Terms and Conditions of the Notes and the taking of any actions

steps and/or proceedings pursuant to Condition 14 (Enforcement) of the Terms and Conditions of the Notes)

the Trustee may (at its sole discretion) request Noteholders to provide an indemnity and/or security and/or

pre-funding to its satisfaction before it takes any action on behalf of Noteholders. The Trustee shall not be

obliged to take any such action if not indemnified and/or secured and/or pre-funded to its satisfaction.Negotiating and agreeing to an indemnity and/or security and/or pre-funding can be a lengthy process and

may impact when any such action can be taken. The Trustee may not be able to take action notwithstanding

the provision of an indemnity or security or pre-funding to it in breach of the terms of the Trust Deed (as

defined in the Terms and Conditions of the Notes) and in such circumstances or where there is uncertainty

or dispute as to the applicable laws or regulations and to the extent permitted by the agreements and the

applicable law it will be for the Noteholders to take such action directly.The Issuer may be treated as a PRC resident enterprise for PRC tax purposes in which case the Issuer

may be subject to PRC income taxes on its worldwide income and interest payable by the Issuer to

foreign investors may be subject to PRC withholding tax and gains on the sale of the Notes may be

subject to PRC tax.Under the PRC Enterprise Income Tax Law (“EIT Law”) and its Implementing Regulation which became

effective on 1 January 2008 enterprises organised under the laws of jurisdictions outside the PRC with their

“de facto management bodies” located within the PRC are deemed to be “resident enterprises for PRC taxpurposes” and are therefore subject to PRC enterprise income tax at the rate of 25% in respect of theirincome sourced from both within and outside China. The Implementing Regulation defines the term “defacto management body” as a management body that exercises substantial and overall control and

management over the production and operations personnel accounting and properties of an enterprise. In

–– 32 ––addition the Notice on Issues Concerning the Determination of Chinese-controlled Enterprises Incorporated

Overseas as Resident Enterprises on the Basis of Their De Facto Management Bodies issued by the State

Administration of Taxation (“SAT”) (國家稅務總局關於境外註冊中資控股企業依據實際管理機構標準認

定為居民企業有關問題的通知) on 22 April 2009 provides that a foreign enterprise controlled by a PRC

company or a PRC group would be classified as a “resident enterprise” with a “de facto management body”

located within the PRC if all of the following requirements are satisfied: (i) the senior management and core

management departments in charge of daily operations are located mainly within the PRC; (ii) financial and

human resources decisions are subject to determination or approval by persons or bodies in the PRC; (iii)

major assets accounting books company seals and minutes and files of board and shareholders’ meetings

are located or kept within the PRC; and (iv) at least half of the enterprise’s directors with voting rights or

senior management reside within the PRC. Pursuant to a circular issued by the SAT which became effective

on 1 September 2011 and the relevant rules a foreign enterprise controlled by a PRC company or a PRC

group shall be deemed a “resident enterprise” by the final decision of the competent tax authority at the

place of registration of the principal investor in PRC of an overseas-registered Chinese-controlled resident

enterprise through the application of the foreign enterprise or the investigation of the relevant tax authorities.There is no assurance that the Issuer will not be treated as a “resident enterprise” under the EIT Law any

aforesaid circulars or any amended regulations in the future. If the Issuer is treated as a PRC resident

enterprise for PRC enterprise income tax purposes among other things it would be subject to the PRC

enterprise income tax at the rate of 25% on its worldwide taxable income. Furthermore if the Issuer is

treated as a PRC resident enterprise payments of interest by the Issuer may be regarded as derived from

sources within the PRC and therefore the Issuer may be obligated to withhold PRC income tax at 10% on

payments of interest on the Notes which the Issuer would be obliged to withhold from payments of

interests to non-PRC resident enterprise investors without an establishment within the PRC or whose

income has no connection to its establishment with the PRC. In the case of non-PRC resident individual

investors the tax may be withheld at a rate of 20%. In addition as the Company is a PRC tax resident in

the event that the Company is required to fulfil its obligations under the Guarantee by making interest

payments on behalf of the Issuer the Company will be required to withhold a 10% PRC income tax in the

case of non-PRC resident enterprises or 20% in the case of non-PRC resident individuals if such payments

are regarded as derived from sources within the PRC.In addition if the Issuer is treated as a PRC resident enterprise any gain realised on the transfer of the

Notes by non-PRC resident investors may be regarded as derived from sources within the PRC and

accordingly may be subject to a 10% PRC income tax in the case of non-PRC resident enterprises or 20% in

the case of non-PRC resident individuals. The PRC tax on interest or gains may be reduced or exempted

under applicable tax treaties between the PRC and the non-PRC resident Noteholder’s home country. For

example according to an arrangement between the PRC and Hong Kong for the avoidance of double-

taxation Noteholders who are Hong Kong residents including both enterprise holders and individual

holders may be exempted from PRC income tax on capital gains derived from a sale or exchange of the

Notes.On 23 March 2016 the Ministry of Commerce of the People’s Republic of China and SAT issued the

Circular of Full Implementation of Replacing Business Tax with Value-Added Tax Reform (Caishui [2016]

No. 36) (“Circular 36”) which introduced a new value-added tax (“VAT”) from 1 May 2016. On 25

December 2024 the National People’s Congress of the PRC (the “NPC”) issued the new Value-added Tax

law (the “New VAT Law”) which is effective on 1 January 2026. Pursuant to the New VAT Law VAT is

applicable where the entities or individuals provide services within the PRC. The revenues generated from

the taxable sale of services by entities and individuals such as financial services shall be subject to PRC

VAT if the seller of the services is within the PRC or the services is consumed within the PRC (including

services provided to the entities or individuals located within the PRC by the entities or individuals outside

of the PRC). Accordingly if the Issuer is deemed to be a PRC resident enterprise in the PRC by the PRC tax

authorities the interest and other interest like earnings derived from such products and received by a non-

–– 33 ––PRC resident Bondholder from the Issuer or the Company (in the event that the Company is required to

discharge its obligations under the Guarantee) may be subject to PRC VAT. The Issuer or the Company (if

applicable) may be required to withhold VAT on payments of interest and certain other amounts on the

Bonds paid to Bondholders that are non-resident enterprises or individuals. VAT is unlikely to be applicable

to any transfer of Bonds between entities or individuals located outside of the PRC and therefore unlikely to

be applicable to gains realised upon such transfers of Bonds but there is uncertainty as to the applicability

of VAT if the seller of Bonds is located inside the PRC. Since the New VAT Law together with other laws

and regulations pertaining to VAT are relatively new the interpretation and enforcement of such laws and

regulations involve uncertainties.If a Noteholder being a non-resident enterprise or non-resident individual is required to pay any PRC

income tax on gains on the transfer of the Notes the value of the relevant Noteholder’s investment in the

Notes may be materially and adversely affected.If the Issuer and/or the Company is required to withhold PRC tax (including VAT) from interest payments

on the Notes or the Guarantee the Issuer and the Company will be required subject to certain exceptions to

pay such additional amounts as will result in receipt by the holders of the Notes of such amounts as would

have been received had no such withholding been required. In certain circumstances the Issuer and/or the

Company may have the option to redeem the Notes prior to their maturity upon the requirement to pay such

additional amounts arising and a Noteholder may not be able to reinvest the redemption proceeds in

comparable securities at the same rate of return of the Notes. In addition the requirement to pay additional

amounts will increase the cost of servicing interest payments on the Notes and could have an adverse effect

on the Group’s financial condition.The Issuer may not be able to redeem the Notes upon the due date for redemption thereof.The Issuer may on the occurrence of a Change of Control Triggering Event or a Non-Registration Event (as

defined under the Terms and Conditions of the Notes) and at maturity will be required to redeem part or all

of the Notes. If such an event were to occur the Issuer may not have sufficient cash in hand and may not be

able to arrange financing to redeem the Notes in time or on acceptable terms or at all. The ability to

redeem the Notes in such event may also be limited by the terms of other debt instruments. The Issuer’s

failure to repay repurchase or redeem tendered Notes could constitute an event of default under the Notes

which may also constitute a default under the terms of other indebtedness of the Group.If the Issuer or the Guarantor are unable to comply with the restrictions and covenants in their debt

agreements (if any) or the Notes there could be a default under the terms of these agreements or the

Notes which could cause repayment of our debt to be accelerated.If the Issuer or the Guarantor are unable to comply with the restrictions and covenants in the Notes or their

current or future debt obligations and other agreements (if any) there could be a default under the terms of

these agreements. In the event of a default under these agreements the holders of the debt could terminate

their commitments to lend to us accelerate repayment of the debt and declare all outstanding amounts due

and payable or terminate the agreements as the case may be. Furthermore some of our debt agreements

contain cross-acceleration or cross-default provisions. As a result default under one debt agreement may

cause the acceleration of repayment of not only such debt but also other debt or result in a default under

other debt agreements including the Notes. If any of these events occur the assets and cash flow of the

Issuer or the Guarantor may not be sufficient to repay in full all of our indebtedness or that we would be

able to find alternative financing. Even if alternative financing can be obtained there is no assurance that it

would be on terms that are favourable or acceptable.–– 34 ––Enforcing the rights of Noteholders under the Notes or the Guarantee across multiple jurisdictions may

prove difficult.The Notes will be issued by the Issuer and guaranteed by the Guarantor. The Issuer is incorporated in

Singapore. The Guarantor is incorporated under the laws of the PRC. The Notes the Deed of Guarantee and

the Trust Deed will be governed by English law and parties to these documents have submitted to the

exclusive jurisdiction of the Hong Kong courts. In the event of a bankruptcy insolvency or similar event

proceedings could be initiated in the PRC Singapore Hong Kong and England and Wales. Such multi-

jurisdictional proceedings are likely to be complex and costly for creditors and otherwise may result in

greater uncertainty and delay regarding the enforcement of an investor’s rights. The rights of Noteholders

under the Notes and the Guarantee will be subject to the insolvency and administrative laws of several

jurisdictions and there can be no assurance that any investor will be able to effectively enforce an investor’s

rights in such complex multiple bankruptcy insolvency or similar proceedings. In addition the bankruptcy

insolvency administrative and other laws of the PRC Singapore Hong Kong and England and Wales may

be materially different from or be in conflict with each other and those with which may be familiar

including in the areas of rights of creditors priority of governmental and other creditors ability to obtain

post-petition interest and duration of the proceeding. The application of these laws or any conflict among

them could call into question whether any particular jurisdiction’s laws should apply adversely affect an

investor’s ability to enforce his/her rights under the Notes and the Guarantees in the relevant jurisdictions or

limit any amounts that any investor may receive.A trading market for the Notes may not develop and there are restrictions on resales of the Notes.Application will be made to the Hong Kong Stock Exchange for the listing of and permission to deal in the Notes.However we cannot assure you that we will obtain or be able to maintain a listing of the Notes on the

Hong Kong Stock Exchange. One or more initial investors may subscribe for a material proportion of the

aggregate principal amount of the Notes which may reduce the liquidity of the Notes in the secondary

trading market and such investors may have certain influence on matters voted on by holders. Accordingly

there can be no assurance as to the liquidity of the Notes or that an active trading market will develop. If

such a market were to develop the Notes could trade at prices that may be higher or lower than the initial

issue price depending on many factors including prevailing interest rates our operations and the market for

similar securities. Further the Notes may be allocated to a limited number of investors in which case

liquidity may be limited. We have been advised that the Initial Purchasers intend to make a market in the

Notes but the Initial Purchasers are not obligated to do so and may discontinue such market making activity

at any time without notice.In addition the Notes are being offered pursuant to exemptions from registration under the Securities Act

and as a result holders will only be able to resell their Notes in transactions that have been registered under

the Securities Act or in transactions not subject to or exempt from registration under the Securities Act. The

Notes and the Trust Deed will contain provisions that will restrict the Notes from being offered sold or

otherwise transferred except pursuant to the exemptions available. It is the investors’ obligation to ensure

that their offers and sales of the Notes within the United States and other counties comply with applicable

securities laws. See “Subscription and Sale”. The Issuer and the Company cannot predict whether an active

trading market for the Notes will develop or be sustained. If an active trading market does not develop or is

sustained the market price and liquidity of the Notes could be adversely affected.Credit ratings may not reflect all risks. Any downgrade in our credit ratings could adversely affect our

business or liquidity.The Notes are expected to be rated “A3” by Moody’s and “A-” by Fitch. The ratings represent opinions of

the rating agencies and their assessment of the ability of the Issuer and the Company to perform their

respective obligations under the Notes and the Guarantee and credit risks in determining the likelihood that

–– 35 ––payments will be made when due under the Notes. The ratings may not fully reflect the potential impact of

all risks relating to the structure market and other factors in relation to the Notes as discussed above and

there may be other factors that may affect the value of the Notes.A rating is not a recommendation to buy sell or hold the Notes and may be subject to revision suspension

or withdrawal at any time by the rating agency. The rating agency may also amend or fully replace the

method it uses for assigning credit ratings.The Company’s rating may be affected by changes in its results of operations capital structure or other

factors which will mean certain risks for the investors. In addition there can be no assurance that a rating

will remain unchanged during a specific range of time or the rating agency will not downgrade or withdraw

a rating based on its assessment of the future developments or as a result of the adoption of a different rating

methodology. Any adverse revision to the Company’s corporate ratings or the sovereign ratings of the PRC

by rating agencies may adversely affect the Company’s business financial performance and market price of

the Notes. For example Moody’s downgraded the sovereign rating of the PRC to A1 with stable outlook on

24 May 2017. Further the Company’s ability to obtain financing or to access capital markets may also be

limited thereby lowering its liquidity.If any of the Company or its subsidiaries is unable to comply with the restrictions and covenants in its

respective debt agreements or the Notes there could be a default under the terms of these agreements or

the Notes which could cause repayment of the relevant debt to be accelerated.If the Issuer or the Company is unable to comply with the restrictions and covenants in the Notes or if any

of the Company or its subsidiaries is unable to comply with its current or future debt obligations and other

agreements there could be a default under the terms of these agreements. In the event of a default under

these agreements the holders of the debt could terminate their commitments to lend to the Company or its

relevant subsidiary accelerate repayment of the debt declare all amounts borrowed due and payable or

terminate the agreements as the case may be. Furthermore some of the Group’s debt agreements and the Notes

contain (or may in the future contain) cross-acceleration or cross-default provisions. As a result the default by

the Company or such subsidiary under one debt agreement may cause the acceleration of repayment of

debt including the Notes or result in a default under its other debt agreements including the Notes. If any of

these events occur there can be no assurance that the assets and cash flows of the Company and its

subsidiaries would be sufficient to repay in full all of their indebtedness or that they would be able to find

alternative financing. Even if alternative financing could be obtained there can be no assurance that it

would be on terms that are favourable or commercially acceptable to the Company or its subsidiaries.Modifications and waivers may be made in respect of the Terms and Conditions of the Notes the Trust

Deed and the Guarantee by the Trustee or less than all of the holders of the Notes that may be adverse to

the interests of individual holders of the Notes.The Terms and Conditions of the Notes contain provisions for calling meetings of Noteholders to consider

matters affecting their interests generally. These provisions permit defined majorities to bind all

Noteholders including those Noteholders who do not attend and vote at the relevant meeting and those

Noteholders who vote in a manner contrary to the majority. There is a risk that the decision of the majority

of holders of the Notes may be adverse to the interests of the individual holders of the Notes.The Terms and Conditions of the Notes also provide that the Trustee may without the consent of

Noteholders (but subject to the Trustee being indemnified and/or secured and/or prefunded to its satisfaction

and other requirements as set forth in the Trust Deed) agree to any modification of any of the Terms and

Conditions of the Notes or any provisions of the Trust Deed the Agency Agreement or the Deed of

Guarantee (other than in respect of certain reserved matters) which in the opinion of the Trustee will not be

materially prejudicial to the interests of Noteholders and to any modification of any of the Terms and

–– 36 ––Conditions of the Notes or any provisions the Trust Deed the Agency Agreement or the Guarantee which in

the opinion of the Trustee is of a formal minor or technical nature or is to correct a manifest error or to

comply with any mandatory provision of applicable law.In addition the Trustee may without the consent of the Noteholders (but subject to the Trustee being

indemnified and/or secured and/or prefunded to its satisfaction and other requirements as set forth in the

Trust Deed) authorise or waive any proposed breach or breach of the Notes the Trust Deed the Agency

Agreement or the Guarantee (other than a proposed breach or breach relating to the subject of certain

reserved matters) if in the opinion of the Trustee the interests of the Noteholders will not be materially

prejudiced thereby.The insolvency laws of Singapore and the PRC and other local insolvency laws may differ from those of

another jurisdiction with which the holders of the Notes are familiar.Because the Issuer is incorporated under the laws of Singapore and the Company is incorporated under the

laws of the PRC as applicable any insolvency proceeding relating to the Issuer and the Company would

likely involve insolvency laws of Singapore the procedural and substantive provisions of which may differ

from comparable provisions of the local insolvency laws of jurisdictions with which the holders of the Notes

are familiar.CNY-denominated Notes is subject to exchange rate risks.The value of Renminbi against other foreign currencies fluctuates from time to time and is affected by

changes in the PRC and international economic conditions as well as many other factors. The PBOC

implemented and may implement changes to the way it calculates the Renminbi’s daily mid-point against the

U.S. dollar and other foreign currency which may increase the volatility in the value of the Renminbi

against foreign currencies. All payments of interest distribution premium (if any) and principal will be

made in Renminbi with respect to the Notes unless otherwise specified. As a result the value of these

Renminbi payments may vary with the changes in the prevailing exchange rates in the marketplace. If the

value of Renminbi depreciates against another foreign currency the value of the investment made by a

holder of the Notes in that foreign currency will decline.There is only limited availability of Renminbi outside Chinese mainland which may affect the liquidity of

the Notes and our ability to source Renminbi outside Chinese mainland to service the Notes.There is only limited availability of Renminbi outside Chinese mainland which may affect the liquidity of

the Notes and our ability to source Renminbi outside Chinese mainland to service the Notes. To the extent

we are required to source Renminbi in the offshore market to service the Notes we cannot assure you that

we will be able to source such Renminbi on satisfactory terms if at all.While the PBOC has entered into agreements (the “Settlement Agreements”) on the clearing of Renminbi

business with financial institutions (the “Renminbi Clearing Banks”) in a number of financial centers and

cities including but not limited to Hong Kong and has established the Cross-Border Inter-Bank Payments

System (the “CIPS”) to facilitate cross-border Renminbi settlement and is further in the process of

establishing Renminbi clearing and settlement mechanisms in several other jurisdictions the conversion and

transfer of Renminbi are still subject to certain regulations and the current size of Renminbi denominated

financial assets outside the PRC is limited.Renminbi business participating banks do not have direct Renminbi liquidity support from the PBOC

although the PBOC has gradually allowed participating banks to access the PRC’s onshore inter-bank market

for the purchase and sale of Renminbi. The Renminbi Clearing Banks only has access to onshore liquidity

support from PBOC to square open positions of participating banks for limited types of transactions and are

–– 37 ––not obliged to square for participating banks any open positions resulting from other foreign exchange

transactions or conversion services. The participating banks will need to source Renminbi from the offshore

market to square such open positions in cases where they cannot source sufficient Renminbi through the

above channels.Although it is expected that the offshore Renminbi market will continue to grow in depth and size its

growth is subject to uncertainties and there can be no assurance on the future availability of Renminbi

offshore.Regulations on cross-border remittance of Renminbi may limit our ability to utilise our PRC revenue

effectively offshore.Since a significant amount of our PRC revenue is denominated in Renminbi any existing and future

regulations on remittance of Renminbi outside of the PRC may limit our ability to utilise revenue generated

in Renminbi to finance our obligations under the Notes.The Notes may not be a suitable investment for all investors.Each potential investor in any Notes must determine the suitability of that investment in light of its own

circumstances. In particular each potential investor should:

* have sufficient knowledge and experience to make a meaningful evaluation of the relevant Notes the

merits and risks of investing in the relevant Notes and the information contained in this Offering

Circular;

* have access to and knowledge of appropriate analytical tools to evaluate in the context of its

particular financial situation an investment in the relevant Notes and the impact such investment will

have on its overall investment portfolio;

* have sufficient financial resources and liquidity to bear all of the risks of an investment in the

relevant Notes;

* understand thoroughly the terms of the relevant Notes and be familiar with the behaviour of any

relevant indices and financial markets; and

* be able to evaluate (either alone or with the help of a financial adviser) possible scenarios for

economic interest rate and other factors that may affect its investment and its ability to bear the

applicable risks.A potential investor should not invest in Notes which are complex financial instruments unless it has the

expertise (either alone or with the help of a financial adviser) to evaluate how the Notes will perform under

changing conditions the resulting effects on the value of such Notes and the impact this investment will

have on the potential investor’s overall investment portfolio.Additionally the investment activities of certain investors are subject to legal investment laws and

regulations or review or regulation by certain authorities. Each potential investor should consult its legal

advisers to determine whether and to what extent (a) Notes are legal investments for it (b) Notes can be

used as collateral for various types of borrowing and (c) other restrictions apply to its purchase of any Notes.Financial institutions should consult their legal advisers or the appropriate regulators to determine the

appropriate treatment of Notes under any applicable risk-based capital or similar rules.–– 38 ––Additional procedures may be required to be taken to bring English law-governed matters or disputes to

the Hong Kong courts and the Noteholders would need to be subject to the exclusive jurisdiction of the

Hong Kong courts. There is also no assurance that the PRC courts will recognise and enforce judgments

of the Hong Kong courts in respect of English law-governed matters or disputes.The Terms and Conditions of the Notes and the transaction documents are governed by English law

whereas parties to these documents have submitted to the exclusive jurisdiction of the Hong Kong courts.In order to hear English law-governed matters or disputes Hong Kong courts may require certain additional

procedures to be taken. Under the Arrangement on Reciprocal Recognition and Enforcement of Judgments in

Civil and Commercial Matters by the Courts of the Mainland and of the Hong Kong Special Administrative

Region (最高人民法院、香港特別行政區政府關於內地與香港特別行政區法院相互認可和執行民商事案

件判決的安排) (the “2019 Arrangement”) which was signed on 18 January 2019 and came into effect on 29

January 2024 where the Hong Kong court has given a legally effective judgment in a civil and commercial

matter any party concerned may apply to the relevant people’s court in mainland China for recognition and

enforcement of the judgment subject to the provisions limits procedures and other terms and requirements

of the 2019 Arrangement and relevant judicial interpretation. The recognition and enforcement of a Hong

Kong court judgment could be refused if the relevant people’s court in mainland China consider that the

enforcement of such judgment is contrary to the basic principles of PRC law or the social and public

interests of the PRC. While it is expected that the PRC courts will recognise and enforce a judgment given

by Hong Kong courts governed by English law there can be no assurance that the PRC courts will do so for

all such judgments as there is no established practise in this area. Compared with other similar debt

securities issuances in the international capital markets where the relevant holders of the debt securities

would not typically be required to submit to an exclusive jurisdiction the holders of the Notes will be

deemed to have submitted to the exclusive jurisdiction of the Hong Kong courts and thus the holder’s

ability to initiate a claim outside of Hong Kong will be limited.The Notes do not restrict the Issuer’s or the Guarantor’s ability to incur additional debt redeem the Notes

or repay other indebtedness or to take other actions that could negatively impact holders of the Notes.The Issuer and the Guarantor are not restricted under the Notes and the Guarantee from incurring additional

debt or from redeeming the Notes or repaying other indebtedness. Future incurrence of indebtedness may

increase the related risks of the Issuer and the Guarantor as described in this Offering Circular. In addition

the covenants applicable to the Notes do not require the Issuer or the Guarantor to achieve or maintain any

minimum financial results relating to their respective financial positions or results of operations. The

Issuer’s and the Guarantor’s ability to recapitalise incur additional debt and take other actions that are not

limited by the Notes could have the effect of diminishing the Issuer’s and the Guarantor’s ability to make

payments on the Notes and the Guarantee when due.The Issuer may from time to time and without the consent of the Noteholders and in accordance with the

Trust Deed create and issue further bonds having the same terms and conditions as the Notes in all respects

(or in all respects except for the issue date the issue price the first payment of interest and the timing for

complying with the requirements set out in these Conditions in relation to the Cross- border Security

Registration and the NDRC Post-Issue Filing) (see “Terms and Conditions of the Notes – Further Issues”)

and so that such further issue will be consolidated and form a single series with the Notes. There can be no

assurance that such future issuance or capital raising activity will not adversely affect the market price of the

Notes.–– 39 ––Payments with respect to the Notes may be made only in the manner specified in such Notes.All payments to investors in respect of the Notes will be made solely (i) for so long as the Notes are

represented by one or more global certificates registered in the name of and lodged with a sub-custodian

for the CMU Operator by transfer to a Renminbi account maintained by or on behalf of the holder with a

bank in Hong Kong in accordance with prevailing CMU rules and procedures or (ii) for so long as the Notes

are in definitive form by transfer to a Renminbi account maintained by or on behalf of the holder with a

bank in Hong Kong in accordance with prevailing rules and regulations. The Issuer is not required to make

payment by any other means (including in any other currency or in bank notes by cheque or draft or by

transfer to a bank account in the PRC).The Notes will be represented by the Global Certificate and holders of a beneficial interest in the Global

Certificate must rely on the procedures of the CMU.The Notes will be represented by the Global Certificate substantially in the form scheduled to the Trust

Deed. The Global Certificate will be registered in the name of and lodged with a sub-custodian for the

CMU Operator and will be exchangeable for Definitive Certificates only in the circumstances set out

therein. Except in the limited circumstances described in the Global Certificate owners of interests in the

Notes represented by the Global Certificate will not be entitled to receive Definitive Certificates in respect

of their individual holdings of the Notes. For persons seeking to hold a beneficial interest in the Notes

through Euroclear or Clearstream Luxembourg such persons will hold their interest through an account

opened and held by Euroclear or Clearstream Luxembourg (as the case may be) with the CMU Operator.While the Notes are represented by the Global Certificate and the Global Certificate is held on behalf of the

CMU Operator the CMU Lodging and Paying Agent will make payments to the CMU Operator who will

make payments to each CMU participant who is for the time being shown in the records of the CMU

Operator as the holder of a particular principal amount of Notes (each an “account holder”).A holder of a beneficial interest in the Global Certificate must rely on the procedures of the CMU to receive

payments under the Notes. None of the Issuer the Guarantor the Initial Purchasers the Trustee or the

Agents or any of their respective affiliates directors officers employees representatives agents or advisers

or any person who controls any of them has any responsibility or liability for the records relating to or

payments made in respect of beneficial interests in the Global Certificate.Holders of beneficial interests in the Global Certificate will not have a direct right to vote in respect of the

Notes. Instead such holders will be permitted to act only to the extent that they are enabled by the CMU to

appoint appropriate proxies. Similarly holders of beneficial interests in the Global Certificate will not have a

direct right under the Global Certificate to take enforcement action against the Issuer in the event of a

default under the Notes but will have to rely upon their rights under the Trust Deed.Noteholders should be aware that a Definitive Certificate which has a principal amount that is not an

integral multiple of the minimum specified denomination may be illiquid and difficult to trade.In relation to any Note which has a principal amount consisting of a minimum specified denomination plus a

higher integral multiple of another smaller amount it is possible that the Notes may be traded in amounts in

excess of the minimum specified denomination that are not integral multiples of such minimum specified

denomination. In such a case a Noteholder who as a result of trading such amounts holds a principal

amount of less than the minimum specified denomination will not receive a Definitive Certificate in respect

of such holding (should Definitive Certificates be printed) and would need to purchase a principal amount of

Notes such that it holds an amount equal to one or more specified denominations. If Definitive Certificates

are issued holders should be aware that a Definitive Certificate which has a principal amount that is not an

integral multiple of the minimum specified denomination may be illiquid and difficult to trade.–– 40 ––The obligations of the Company under the Guarantee are structurally subordinated to the liabilities and

obligations of its subsidiaries.The Company’s ability to perform its obligations under the Guarantee is effectively dependent on the cash

flow of its subsidiaries. Any claim by the Trustee against the Company in relation to the Guarantee will be

effectively subordinated to all existing and future obligations of the Company’s subsidiaries (which have not

provided any guarantee under the Notes) and all claims by creditors of such subsidiaries will have priority

to the assets of such entities over the claims of the Trustee under the Guarantee.The Issuer and the Guarantor will follow the applicable corporate disclosure standards for debt securities

listed on the Hong Kong Stock Exchange which standards may be different from those applicable to

companies in certain other countries.The Issuer and the Guarantor will be subject to reporting obligations in respect of the Notes to be listed on

the Hong Kong Stock Exchange. The disclosure standards imposed by the Hong Kong Stock Exchange may

be different than those imposed by securities exchanges in other countries or regions such as the United

States or Singapore. As a result the level of information that is available may not correspond to what

investors in the Notes are accustomed to.Noteholders are exposed to risks relating to Singapore taxation and there is no assurance that the Notes

may continue to be deemed as “qualifying debt securities” under the Income Tax Act 1947 of Singapore.The Notes are intended to be issued as “qualifying debt securities” for the purposes of the Income Tax Act

1947 of Singapore (“ITA”) subject to the fulfilment of certain conditions more particularly described in the

“Taxation – Singapore Taxation” section of this Offering Circular.However there is no assurance that the Notes will be or continue to be “qualifying debt securities” or that

the tax concessions and exemptions in connection therewith will apply throughout the tenure of the Notes

should the relevant tax laws be amended or revoked or if there is an alteration in the interpretation of the

relevant tax laws by the Inland Revenue Authority of Singapore. If the Notes fail to be or fail to continue to

be “qualifying debt securities” and/or if payments of interest and other income if any with respect to the

Notes are not exempt from Singapore withholding tax under the above qualifying debt securities scheme for

whatever reason such payments to non-residents of Singapore would generally be subject to withholding of

tax by us. In such circumstances we may be obliged to pay any additional amounts in connection with such

withholding tax. We may have the right at our election to redeem the Notes if additional amounts arepayable to the noteholders as a result of any change in tax law. See “Terms and Conditions of the Notes –Redemption for Taxation Reasons.”

–– 41 ––USE OF PROCEEDS

The net proceeds from the issue of Notes will primarily be used for refinancing our existing indebtedness

and general corporate purposes in accordance with applicable PRC laws and regulations.–– 42 ––CAPITALISATION AND INDEBTEDNESS

The following table sets forth the Company’s capitalisation and indebtedness as at 30 June 2025:

* on an actual basis; and

* on an as adjusted basis to give effect to the issuance of the Notes and receipt of the gross proceeds

from this offering.Prospective investors should read this table together with “Selected Historical Consolidated FinancialInformation” and the Company’s reviewed consolidated financial statements included elsewhere in this

Offering Circular.As at 30 June 2025

Actual As adjusted

RMB RMB

(millions) (millions)

Short-term borrowings(1)

Interest-bearing bank borrowings . . . . . . . . . . . . . . . . . . . . . . 2892.8 2892.8

Long-term bonds (current portion) . . . . . . . . . . . . . . . . . . . . . 6658.9 6658.9

Loans from a related party . . . . . . . . . . . . . . . . . . . . . . . . . . 2577.8 2577.8

Total short-term borrowings . . . . . . . . . . . . . . . . . . . . . . . . . 12129.5 12129.5

Long-term borrowings(1)

Interest-bearing bank borrowings . . . . . . . . . . . . . . . . . . . . . . 139.2 139.2

Long-term bonds (non-current portion) . . . . . . . . . . . . . . . . . . 2136.4 2136.4

Loans from a related party . . . . . . . . . . . . . . . . . . . . . . . . . . 2627.9 2627.9

Notes to be issued(2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 5000.0

Total long-term borrowings (net of current portion) . . . . . . . . . 4903.5 9903.5

Total borrowings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17033.0 22033.0

Shareholders’ Equity

Equity attributable to owners of the Company . . . . . . . . . . . . . 44701.3 44701.3

Issued capital . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4771.6 4771.6

Reserves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39929.7 39929.7

Non-controlling interests . . . . . . . . . . . . . . . . . . . . . . . . . . . 728.0 728.0

Total equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45429.3 45429.3

Total capitalisation(3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62462.3 67462.3

Notes:

(1) See the Company’s reviewed consolidated financial statements and the related notes included elsewhere in this Offering

Circular for further details.

(2) The maturity date is 16 March 2029.

(3) Total capitalisation equals total borrowings plus total equity.

–– 43 ––As at 30 June 2025 the Company had no assets pledged for any of the above borrowings and had total

credit facilities of RMB43.0 billion of which RMB37.1 billion was undrawn.In the ordinary course of the Group’s business the Group may from time to time consider various

financing opportunities and incur additional debt including bank borrowings and bond issuances. In July

2025 the Group incurred borrowings in aggregate principal amount of RMB2.1 billion.

Except as otherwise disclosed in this Offering Circular there has been no material adverse change in our

indebtedness and capitalisation since 30 June 2025.–– 44 ––SELECTED HISTORICAL CONSOLIDATED FINANCIAL INFORMATION

The following selected historical consolidated statement of profit or loss data for the years ended 31

December 2022 2023 and 2024 selected historical consolidated statement of comprehensive income data

for the years ended 31 December 2022 2023 and 2024 selected historical consolidated statement of

financial position data as at 31 December 2022 2023 and 2024 and selected historical consolidated

statement of cash flows for the years ended 31 December 2022 2023 and 2024 have been derived from the

Company’s audited consolidated financial statements included elsewhere in this Offering Circular. The

following selected historical consolidated statement of profit or loss data for the six months ended 30 June

2024 and 2025 selected historical consolidated statement of comprehensive income data for the six months

ended 30 June 2024 and 2025 selected historical consolidated statement of financial position data as at 30

June 2025 and selected historical consolidated statement of cash flows for the six months ended 30 June

2024 and 2025 have been derived from the Company’s reviewed consolidated financial statements included

elsewhere in this Offering Circular. Prospective investors should read the selected financial information

below in conjunction with the Group’s consolidated financial statements and related notes included

elsewhere in this Offering Circular. The Group’s consolidated financial statements are prepared and

presented in accordance with HKFRSs.Consolidated Statement of Profit or Loss

Year ended 31 December Six months ended 30 June

20222023202420242025

RMB RMB RMB RMB RMB

(thousands) (thousands) (thousands) (thousands) (thousands)

REVENUE . . . . . . . . . . . . . . . . . . 35658896 44108616 48301581 22528544 23320327

Sales surtaxes . . . . . . . . . . . . . . . . . (48768) (66375) (83484) (31881) (25256)

Revenue net of sales surtaxes . . . . . . 35610128 44042241 48218097 22496663 23295071

Other income . . . . . . . . . . . . . . . . . 342172 309718 327137 214175 29257

Depreciation of property plant

and equipment and amortisation

of intangible assets and

MultiClient library . . . . . . . . . . . . (4685573) (5195328) (5789357) (2837411) (3123495)

Depreciation of right-of-use assets . . . (367115) (415317) (545335) (198331) (358130)

Employee compensation costs . . . . . . (7414041) (8201983) (8391877) (3899544) (4025094)

Repair and maintenance costs . . . . . . (594825) (601614) (862963) (258507) (163363)

Consumption of supplies materials

fuel services and others . . . . . . . . (9080592) (10101768) (11017633) (4846262) (4471903)

Subcontracting expenses . . . . . . . . . . (8164558) (11420862) (12970477) (5999178) (6350064)

Lease expenses . . . . . . . . . . . . . . . . (1666872) (2147453) (2117417) (999814) (944468)

Other operating expenses . . . . . . . . . (1175708) (1355818) (1808651) (984325) (918001)

Impairment of property

plant and equipment . . . . . . . . . . . (30198) – – – (82032)

Impairment losses under expected credit

loss model net of reversal . . . . . . . (49435) (56579) 6090 4556 20787

Total operating expenses . . . . . . . . . . (33228917) (39496722) (43497620) (20018816) (20415763)

–– 45 ––Year ended 31 December Six months ended 30 June

20222023202420242025

RMB RMB RMB RMB RMB

(thousands) (thousands) (thousands) (thousands) (thousands)

PROFIT FROM OPERATIONS . . . 2723383 4855237 5047614 2692022 2908565

Exchange gain/(loss) net . . . . . . . . . 565845 (37143) 42540 (14889) (96484)

Finance costs . . . . . . . . . . . . . . . . . (777108) (996796) (785137) (449918) (355869)

Interest income . . . . . . . . . . . . . . . . 123432 181132 118415 59545 45817

Investment income . . . . . . . . . . . . . . 16307 14953 1298 1160 5528

Gains/(losses) arising from financial

assets at fair value through

profit or loss . . . . . . . . . . . . . . . . 65263 71135 43101 42583 11817

Share of profits of an associate and

joint ventures net of tax . . . . . . . . 287558 178309 218686 95800 68194

Other gains and losses . . . . . . . . . . . (23201) (23959) (19178) (17260) (15474)

PROFIT BEFORE TAX . . . . . . . . . 2981479 4242868 4667339 2409043 2572094

Income tax expense . . . . . . . . . . . . . (482275) (960240) (1268236) (699395) (495316)

PROFIT FOR THE YEAR/PERIOD 2499204 3282628 3399103 1709648 2076778

Attributable to:

Owners of the Company . . . . . . . . . . 2358697 3013255 3136992 1592392 1963844

Non-controlling interests . . . . . . . . . . 140507 269373 262111 117256 112934

24992043282628339910317096482076778

EARNINGS PER SHARE

ATTRIBUTABLE TO OWNERS

OF THE COMPANY

Basic and diluted (RMB) . . . . . . . . . 49.43 cents 63.15 cents 65.74 cents 33.37 cents 41.16 cents

–– 46 ––Consolidated Statement of Comprehensive Income

Year ended 31 December Six months ended 30 June

20222023202420242025

RMB RMB RMB RMB RMB

(thousands) (thousands) (thousands) (thousands) (thousands)

PROFIT FOR THE YEAR/PERIOD 2499204 3282628 3399103 1709648 2076778

OTHER COMPREHENSIVE

INCOME

Other comprehensive income that

may be reclassified to profit or loss

in subsequent periods:

Exchange differences on translation of

financial statements of foreign

operations . . . . . . . . . . . . . . . . . . (192861) 13264 (13314) 568 (2617)

Income tax effect . . . . . . . . . . . . . . (131517) (22783) (20041) (8306) 6435

OTHER COMPREHENSIVE

PROFIT FOR THE YEAR/

PERIOD NET OF TAX . . . . . . . (324378) (9519) (33355) (7738) 3818

TOTAL COMPREHENSIVE PROFIT

FOR THE YEAR/PERIOD . . . . . 2174826 3273109 3365748 1701910 2080596

Attributable to:

Owners of the Company . . . . . . . . . . 2016926 3000023 3100053 1583184 1968327

Non-controlling interests . . . . . . . . . . 157900 273086 265695 118726 112269

21748263273109336574817019102080596

–– 47 ––Consolidated Statement of Financial Position

As at 31 December As at 30 June

2022202320242025

RMB RMB RMB RMB

(thousands) (thousands) (thousands) (thousands)

NON-CURRENT ASSETS

Property plant and equipment . . . . . . . . . . . . 44148190 48928386 50459844 49671908

Right-of-use assets . . . . . . . . . . . . . . . . . . . . 1194078 1301420 1447774 1820529

Goodwill . . . . . . . . . . . . . . . . . . . . . . . . . . – – – –

Other intangible assets . . . . . . . . . . . . . . . . . 151678 155710 210865 184895

MultiClient library . . . . . . . . . . . . . . . . . . . . 216100 131804 72082 44584

Investments in an associate and joint ventures . . 988381 1064203 1194040 1208842

Contract costs . . . . . . . . . . . . . . . . . . . . . . . 496813 919172 630094 555767

Financial assets at fair value through

profit or loss . . . . . . . . . . . . . . . . . . . . . . – – – –

Other non-current assets . . . . . . . . . . . . . . . . 1829173 415926 238234 254798

Deferred tax assets . . . . . . . . . . . . . . . . . . . . 26636 59111 28543 95034

Total non-current assets . . . . . . . . . . . . . . . . . 49051049 52975732 54281476 53836357

CURRENT ASSETS

Inventories . . . . . . . . . . . . . . . . . . . . . . . . . 2528806 2339628 2154270 2452390

Prepayments deposits and other receivables . . . 280734 202770 285816 309616

Accounts receivable . . . . . . . . . . . . . . . . . . . 14175184 14125168 14062653 19469176

Notes receivable . . . . . . . . . . . . . . . . . . . . . 22759 115940 50987 5787

Receivables at fair value through other

comprehensive income . . . . . . . . . . . . . . . . 8200 351950 156397 97648

Financial assets at fair value through

profit or loss . . . . . . . . . . . . . . . . . . . . . . 5106036 4501296 5500549 –

Contract assets . . . . . . . . . . . . . . . . . . . . . . . 47971 53700 70917 6445

Contract costs . . . . . . . . . . . . . . . . . . . . . . . 47411 30550 142224 377

Other current assets . . . . . . . . . . . . . . . . . . . 1771338 333864 268244 575498

Pledged deposits . . . . . . . . . . . . . . . . . . . . . 10976 11291 8119 11862

Time deposits . . . . . . . . . . . . . . . . . . . . . . . 548535 2226439 542239 101247

Cash and cash equivalents . . . . . . . . . . . . . . . 3561740 5977506 5423772 7107977

Total current assets . . . . . . . . . . . . . . . . . . . . 28109690 30270102 28666187 30138023

CURRENT LIABILITIES

Trade and other payables . . . . . . . . . . . . . . . . 11629065 14339226 16419654 15243755

Notes payable . . . . . . . . . . . . . . . . . . . . . . . 11866 7309 – –

Salary and bonus payables . . . . . . . . . . . . . . . 1033179 1040432 936994 1479908

Tax payable . . . . . . . . . . . . . . . . . . . . . . . . 94937 454377 453825 603853

Loans from a related party . . . . . . . . . . . . . . . 2437610 2478945 2515940 2577796

Interest-bearing bank borrowings . . . . . . . . . . . 3515710 2965515 18267 2892778

Long-term bonds . . . . . . . . . . . . . . . . . . . . . 872231 140744 7327272 6658880

Lease liabilities . . . . . . . . . . . . . . . . . . . . . . 437193 304968 468144 671138

Contract liabilities . . . . . . . . . . . . . . . . . . . . 759723 1207351 1046520 745251

Other current liabilities . . . . . . . . . . . . . . . . . 500387 425762 416303 783611

Total current liabilities . . . . . . . . . . . . . . . . . 21291901 23364629 29602919 31656970

NET CURRENT ASSETS . . . . . . . . . . . . . . 6817789 6905473 (936732) (1518947)

–– 48 ––As at 31 December As at 30 June

2022202320242025

RMB RMB RMB RMB

(thousands) (thousands) (thousands) (thousands)

TOTAL ASSETS LESS

CURRENT LIABILITIES . . . . . . . . . . . . . 55868838 59881205 53344744 52317410

NON-CURRENT LIABILITIES

Deferred tax liabilities . . . . . . . . . . . . . . . . . . 244516 387709 277627 34986

Loans from related parties . . . . . . . . . . . . . . . 2196259 2648996 1529370 2627929

Interest-bearing bank borrowings . . . . . . . . . . . 168994 157396 145425 139244

Long-term bonds . . . . . . . . . . . . . . . . . . . . . 12021878 12182776 5142559 2136446

Lease liabilities . . . . . . . . . . . . . . . . . . . . . . 569593 742220 756123 1045353

Contract liabilities . . . . . . . . . . . . . . . . . . . . 458722 1292800 669796 499524

Deferred income . . . . . . . . . . . . . . . . . . . . . 204579 186332 209715 212897

Employee benefit liabilities . . . . . . . . . . . . . . 7587 15440 23925 26661

Other non-current liabilities . . . . . . . . . . . . . . 20743 11430 165668 165028

Total non-current liabilities . . . . . . . . . . . . . . 15892871 17625099 8920208 6888068

Net assets . . . . . . . . . . . . . . . . . . . . . . . . . . 39975967 42256106 44424536 45429342

EQUITY

Equity attributable to owners of the Company

Issued capital . . . . . . . . . . . . . . . . . . . . . . . 4771592 4771592 4771592 4771592

Reserves . . . . . . . . . . . . . . . . . . . . . . . . . . . 34637573 36871427 39025570 39929791

39409165416430194379716244701383

Non-controlling interests . . . . . . . . . . . . . . . . 566802 613087 627374 727959

Total Equity . . . . . . . . . . . . . . . . . . . . . . . . 39975967 42256106 44424536 45429342

–– 49 ––Consolidated Statement of Cash Flows

Year ended 31 December

202220232024

RMB RMB RMB

(thousands) (thousands) (thousands)

CASH FLOWS FROM OPERATING ACTIVITIES

Cash generated from operations . . . . . . . . . . . . . . . . 7739497 13594475 12193349

Taxes paid:

Chinese Mainland corporate income tax paid . . . . . . . (643639) (246713) (1013639)

Overseas income taxes paid . . . . . . . . . . . . . . . . . . (196972) (256016) (195033)

Net cash flows generated from operating activities . . . 6898886 13091746 10984677

CASH FLOWS FROM INVESTING ACTIVITIES

Purchase of property plant and equipment and other

long-term assets . . . . . . . . . . . . . . . . . . . . . . . . (4136266) (9294351) (6006902)

Investment in Multiclient library . . . . . . . . . . . . . . . (216) – –

Government grant received . . . . . . . . . . . . . . . . . . . 1000 4158 31949

Purchase of floating rate investments in corporate

wealth management products monetary funds debt

instrument and time deposits . . . . . . . . . . . . . . . . (7553024) (4950000) (7940000)

Proceeds from disposal/maturity of floating rate

investments in corporate wealth management products

and monetary funds . . . . . . . . . . . . . . . . . . . . . . 7329466 6640751 8672563

Proceeds from disposal of property

plant and equipment . . . . . . . . . . . . . . . . . . . . . . 32724 101691 15957

Disposal of a joint venture . . . . . . . . . . . . . . . . . . . 6524 2862 –

Acquisition of subsidiaries . . . . . . . . . . . . . . . . . . . 345840 – –

Purchase of non-controlling shareholder equity shares . – (4763) –

Interest received . . . . . . . . . . . . . . . . . . . . . . . . . . 63527 119575 116455

Dividends received from joint ventures and an associate 183590 102288 89294

Deposits paid for acquisition of property

plant and equipment . . . . . . . . . . . . . . . . . . . . . . (5803) (179412) (24158)

Net cash flows used in investing activities . . . . . . . . (3732638) (7457201) (5044842)

CASH FLOWS FROM FINANCING ACTIVITIES

New bank loans . . . . . . . . . . . . . . . . . . . . . . . . . . 3383860 3085256 –

New loans from related parties . . . . . . . . . . . . . . . . 2133599 408711 –

Repayment of bank loans and loans from related parties (18200) (3675994) (4093966)

Repayment of long-term bonds . . . . . . . . . . . . . . . . (8294900) (728618) –

Repayment of lease liabilities . . . . . . . . . . . . . . . . . (372290) (471772) (455096)

Dividends paid . . . . . . . . . . . . . . . . . . . . . . . . . . . (865739) (953455) (1190534)

Interest paid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (834277) (947961) (724983)

Net cash flows used in financing activities . . . . . . . . (4867947) (3283833) (6464579)

NET (DECREASE)/INCREASE IN

CASH AND CASH EQUIVALENTS . . . . . . . . . (1701699) 2350712 (524744)

Cash and cash equivalents at beginning of year . . . . . 5006389 3561740 5977506

Effect of foreign exchange rate changes net . . . . . . . 257050 65054 (28990)

CASH AND CASH EQUIVALENTS

AT END OF YEAR . . . . . . . . . . . . . . . . . . . . . 3561740 5977506 5423772

–– 50 ––Year ended 31 December

202220232024

RMB RMB RMB

(thousands) (thousands) (thousands)

ANALYSIS OF BALANCES OF

CASH AND CASH EQUIVALENTS

Cash and balances with banks and financial institutions 4121251 8215236 5974130

Less: Pledged deposits . . . . . . . . . . . . . . . . . . . . . . (10976) (11291) (8119)

Time deposits . . . . . . . . . . . . . . . . . . . . . . . . . . . (548535) (2226439) (542239)

Cash and cash equivalents as stated in the consolidated

statement of cash flows . . . . . . . . . . . . . . . . . . . 3561740 5977506 5423772

Six months ended 30 June

20242025

RMB RMB

(thousands) (thousands)

CASH FLOWS FROM OPERATING ACTIVITIES

Net cash flows generated from operating activities . . . . . . . . . . . . . . 1714195 (494737)

CASH FLOWS FROM INVESTING ACTIVITIES

Purchase of property plant and equipment and other long-term assets . (2336784) (2451531)

Government grant received . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327 –

Purchase of floating rate investments in corporate wealth management

products monetary funds debt instrument and time deposits . . . . . . (2440000) –

Proceeds from disposal/maturity of floating rate investments in corporate

wealth management products and monetary funds . . . . . . . . . . . . . 8167334 5960411

Proceeds from disposal of property plant and equipment . . . . . . . . . . 15579 108

Interest received . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58489 45332

Dividends received from joint ventures and an associate . . . . . . . . . . 25294 53384

Deposits paid for acquisition of property plant and equipment . . . . . . (100556) –

Net cash flows used in investing activities . . . . . . . . . . . . . . . . . . . 3389683 3607704

CASH FLOWS FROM FINANCING ACTIVITIES

New bank loans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 2870000

New loans from related parties . . . . . . . . . . . . . . . . . . . . . . . . . . . – 1095989

Repayment of bank loans and loans from related parties . . . . . . . . . . (1270702) (9100)

Repayment of long-term bonds . . . . . . . . . . . . . . . . . . . . . . . . . . . – (3586375)

Repayment of lease liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . (196700) (291446)

Dividends paid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (1078534) (1214329)

Interest paid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (475858) (284020)

Net cash flows used in financing activities . . . . . . . . . . . . . . . . . . . (3021794) (1419281)

NET (DECREASE)/INCREASE IN

CASH AND CASH EQUIVALENTS . . . . . . . . . . . . . . . . . . . . . 2082084 1693686

Cash and cash equivalents at beginning of year . . . . . . . . . . . . . . . . 5977506 5423772

Effect of foreign exchange rate changes net . . . . . . . . . . . . . . . . . . (22137) (9481)

ANALYSIS OF BALANCES OF

CASH AND CASH EQUIVALENTS

Cash and cash equivalents as stated in the consolidated

statement of cash flows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8037453 7107977

–– 51 ––Other Financial Data

Year ended 31 December Six months ended 30 June

20222023202420242025

Other Financial Data

EBITDA(1) (million RMB) . . . . . . . . 8883.4 10916.9 11762.1 5893.5 6476.1

EBITDAMargin(2) . . . . . . . . . . . . . 24.9% 24.8% 24.4% 26.2% 27.8%

Total debt(3) (million RMB) . . . . . . . 21212.7 20574.4 16678.9 19339.8 17033.0

Net debt(4) (million RMB) . . . . . . . . 9369.2 7857.9 5204.3 10193.3 9811.9

Total debt/EBITDA . . . . . . . . . . . . . 2.4 1.9 1.4 3.3 2.6

Net debt/EBITDA . . . . . . . . . . . . . . 1.1 0.7 0.4 1.7 1.5

EBITDA/Finance costs(5) . . . . . . . . . 11.4 11.0 15.0 13.1 18.2

Total debt/Total capitalisation(6) . . . . . 34.7% 32.7% 27.3% 31.7% 27.3%

Notes:

(1) EBITDA for any period is calculated as profit for the year adjusted for income tax expense total interests included in

finance cost interest capitalised bank charges included in finance cost impairment of property plant and equipment

impairment losses of accounts receivable and other receivables (net of reversal) wrote-down and reserved write-down

of inventory depreciation of property plant and equipment and amortisation of intangible assets and depreciation of

right-of-use assets. EBITDA should not be viewed as an alternative measure of operating results or cash flows from

operating activities as determined in accordance with HKFRSs or U.S. GAAP. EBITDA has been included because it is

widely used as a financial measure of the potential capacity of a company to incur and service debt. EBITDA is not a

standard measure under HKFRSs or U.S. GAAP. The Company has included EBITDA because the Company believes it

is a financial measure commonly used in the offshore oilfield services industry. Since the industry is capital intensive

capital expenditures for construction and purchase of equipment and levels of debt and interest expenses may have a

significant impact on companies with similar operating results. EBITDA should not be considered in isolation or

construed as an alternative to operating income operating cash flows or any other measure of performance or as an

indicator of operating performance liquidity profitability or cash flows generated by operating investing and financing

activities. EBITDA fails to account for taxes interest expense and other non-operating cash expenses. EBITDA does

not consider any functional or legal requirements of the business that may require the Company to conserve and

allocate funds for purposes other than debt service or funding of exploration and development activities. EBITDA

measures presented in this Offering Circular may not be comparable to other similarly titled measures of other

companies.

(2) EBITDA margin is calculated as EBITDA divided by total revenue.

(3) Total debt consists of all short-term interest-bearing bank borrowings loans from a related party long-term interest

bearing bank borrowings long-term bonds due within one year and the remaining portion of long-term bonds.

(4) Net debt is calculated as total debt minus debt instrument at amortised cost cash and cash equivalents pledged

deposits investments in floating rate corporate wealth management products investments in fixed rate corporate wealth

management products and investments in liquidity funds.

(5) Finance costs include interest on bank borrowings and long-term bonds plus other finance costs as set out in the

Company’s audited consolidated financial statements included elsewhere in this Offering Circular.

(6) Total capitalisation equals total debt plus total equity.

–– 52 ––The following table reconciles the Company’s profit for the year under HKFRSs to the definitions of

EBITDA for the periods indicated:

Year ended 31 December Six months ended 30 June

20222023202420242025

RMB RMB RMB RMB RMB

(millions) (millions) (millions) (millions) (millions)

Other Financial Data

Profit for the year . . . . . . . . . . . . . . . . . 2499.2 3282.6 3399.1 1709.6 2076.8

Income tax expense . . . . . . . . . . . . . . . . (482.3) (960.2) (1268.2) (699.4) (495.3)

Total interests included in finance cost . . . (763.6) (969.4) (759.9) (437.6) (344.9)

Interest capitalised . . . . . . . . . . . . . . . . . – – – – –

Bank charges included in finance cost . . . . (13.5) (27.4) (24.9) (12.3) (10.9)

Impairment of property plant and equipment (30.2) – – – (82.0)

Impairment losses of accounts receivable and

other receivables net of reversal . . . . . . (49.4) (56.6) 6.1 4.6 20.8

Wrote-down and reversed write-down

of inventory . . . . . . . . . . . . . . . . . . . . 7.5 (10.1) 18.6 (3.5) (5.4)

Depreciation of property plant and

equipment and amortisation of intangible

assets and MultiClient library . . . . . . . . (4685.6) (5195.3) (5789.4) (2837.4) (3123.5)

Depreciation of right-of-use assets . . . . . . (367.1) (415.3) (545.3) (198.3) (358.1)

EBITDA . . . . . . . . . . . . . . . . . . . . . . . 8883.4 10916.9 11762.1 5893.5 6476.1

–– 53 ––THE ISSUER

The Issuer is an indirect wholly owned subsidiary of the Company and was incorporated as a Singapore

private company limited by shares on 29 October 2009 in Singapore under the Companies Act 1967 of

Singapore. On 16 June 2015 the Issuer was converted to a public company limited by shares. The Issuer’s

registration number is 200920232R. As at the date of the Offering Circular its registered office is located at

3 Benoi Road COSL (Singapore) Base Singapore 629877.

For so long as any Notes are outstanding the Issuer will not conduct business or any other activities other

than to finance the business operations of the Company or one or more companies controlled by the

Company through the offering sale or issuance of securities and borrowings of indebtedness and holding of

the proceeds thereof or investing in or lending of the proceeds thereof to the Company or a company

controlled by the Company and any other activities in connection therewith. The Issuer’s primary purpose is

to act as one of the Company’s financing subsidiaries to issue the Notes. As at the date of this Offering

Circular the Issuer has no material assets or revenues other than the amounts due to it from the Company or

such company controlled by the Company outside the PRC in respect of such intercompany loans. As the

amount of interest and related financing income that the Issuer has received from its on-lending to other

members of the Group has been less than its financing costs the Issuer recorded net liabilities as at 31

December 2022 2023 and 2024. In this regard the Company has entered into a letter of financial support

where it has undertaken to provide continual financial support to the borrowers of the intercompany loans in

order that they are able to repay any and all amounts outstanding to the Issuer under the intercompany loans

as and when required. This is in addition to the Company providing the guarantees in respect of the Issuer’s

offshore debt securities. In the opinion of the directors of the Issuer with such continued financial support

from the Company there are reasonable grounds to believe that the Issuer will be able to pay all of its debtas and when they fall due. Also see “Risk Factor – Risks relating to the Notes and the Guarantee – TheIssuer has limited financial resources” and audited financial statements of the Issuer included elsewhere in

this Offering Circular.As at the date of the Offering Circular the directors of the Issuer are Chen Yiran Wang Qian and Zhang

Yan and the issued and paid up share capital of the Issuer is S$2.00 comprising two ordinary shares.As at the date of the Offering Circular the Issuer had no subsidiaries.–– 54 ––THE GUARANTOR

The Company unconditionally and irrevocably guarantees the obligations under the Notes. The Company’s

legal and commercial name is China Oilfield Services Limited (中海油田服務股份有限公司 ). The

Company was registered on 26 September 2002 in the PRC as a joint stock limited company. Its unified

social credit code is 9112011671092921XD. Its business address is 201 Haiyou Avenue Yanjiao Economic

& Technological Development Zone Sanhe City Hebei Province 065201 and its telephone number is +86-

10-84521685. The Company’s H shares are listed on the Hong Kong Stock Exchange and its A shares are

listed on Shanghai Stock Exchange.CNOOC directly owned or controlled an aggregate of approximately 50.86% of the Company’s shares as at

30 June 2025. Accordingly CNOOC is able to exercise all the rights of a controlling shareholder including

electing the Company’s directors and voting to amend its articles of association. Although CNOOC has

retained a controlling interest in the Company the management of the Company’s business will be the

Company’s directors’ responsibility.–– 55 ––BUSINESS OF THE GROUP

Overview

The Company listed on the Hong Kong Stock Exchange (HK stock code: 02883) and Shanghai Stock

Exchange (Shanghai stock code: 601808) is one of the leading integrated oilfield services providers in the world.The Company provides comprehensive services for the exploration development and production of oil and

gas including geophysical acquisition and surveying services drilling services well services marine support

services and integrated solution and new energy services and also offers one-stop solution and general

contracting service. The Company provides integrated oilfield services overseas including in Asia Pacific

Middle East Americas Europe and Africa.The Company operates and manages the largest offshore operation fleet with the most comprehensive

functions in China. As at 30 June 2025 the Company owned and/or operated a fleet of offshore oilfield

services facilities globally comprising 60 drilling rigs (of which 46 are jack-up drilling rigs and 14 are

semi-submersible drilling rigs) over 200 vessels including AHTS vessels platform supply vessels and

standby vessels five towing streamer seismic vessels five ocean bottom seismic vessels and four integrated

marine survey and geotechnical vessels as well as a vast array of modern facilities and equipment for

logging drilling fluids directional drilling cementing and well work-over services.Capitalising on its long-term relationships with clients and its capacity to offer comprehensive services the

Company has maintained a dominant market position in offshore China and has expanded overseas by

offering integrated services and services that may be tailored to accommodate clients’ needs. For the years

ended 31 December 2022 2023 and 2024 and for the six months ended 30 June 2024 and 2025 revenue

sourced outside China represented approximately 17.6% 21.5% 22.5% 24.6% and 23.7% respectively of

the Company’s total revenue.The Company was registered on 26 September 2002 in the PRC as a joint stock limited company through

the restructuring of various subsidiaries of CNOOC. As at 30 June 2025 CNOOC was the Company’s

controlling shareholder and beneficially owned approximately 50.86% of the Company’s issued share

capital. CNOOC was established in 1982 by the PRC government as a state-owned offshore petroleum

company and is owned and controlled by the SASAC in which 90% of the equity interest is held by the

SASAC and 10% of the equity interest is held by the NSSF. CNOOC’s core business is offshore oil and gas

exploration and production. The Company’s H shares were listed on the main board of the Hong Kong Stock

Exchange on 20 November 2002 (stock code: 02883) and the Company’s A shares were listed on the main

board of the Shanghai Stock Exchange on 28 September 2007 (stock code: 601808).The Company’s largest customer is CNOOC Limited the largest producer of offshore crude oil and natural

gas in China. CNOOC holds exclusive right from the PRC government to enter into PSCs with foreign

partners relating to petroleum resources exploitation in offshore China. CNOOC assigned CNOOC Limited

all of its rights and obligations under then-existing PSCs in 1999 and has undertaken to assign CNOOC

Limited its future PSCs with the exception of those relating to CNOOC’s administrative functions. The

Company also regularly enters into transactions with other members of the CNOOC Group. For the years

ended 31 December 2022 2023 and 2024 and for the six months ended 30 June 2024 and 2025 revenue

derived from CNOOC Group (excluding CNOOC Limited and its subsidiaries) represented 2.1% 1.4%

1.4% 0.4% and 0.7% respectively of the Company’s revenue and revenue from CNOOC Limited and its

subsidiaries represented approximately 81.2% 80.6% 77.4% 76.7% and 76.9% respectively of the

Company’s revenue for the same periods.For the years ended 31 December 2022 2023 and 2024 and for the six months ended 30 June 2024 and

2025 the Company recorded revenue of approximately RMB35658.9 million RMB44108.6 million

RMB48301.6 million RMB22528.5 million and RMB23320.3 million respectively and the Company’s

–– 56 ––profit for the years ended 31 December 2022 2023 and 2024 and for the six months ended 30 June 2024 and

2025 was approximately RMB2499.2 million RMB3282.6 million RMB3399.1 million RMB1709.6

million and RMB2076.8 million respectively.The following chart outlines the Company’s group structure containing its material subsidiaries as at 30 June

2025:

China Oilfield Services Limited

()

(the “Guarantor”)

100%100%100%

COSL Hainan Ltd. COSLDeepwater Tianjin Eco-friendlyTechnology Co. Ltd. Technology Co. Ltd.Onshore

Offshore

100%100%100%

COSLHong Kong COSLAmerica China Oilfield

International Inc Services (BVI)

Limited Limited

61.54%100%100%100%

38.46%

COSLDrilling COSLSingapore ChinaOilfield

Pan Pacific Ltd. Ltd Services Southeast

COSLMiddle East

Asia (BVI) Ltd FZE

100%100%100%49%100%

COSLOil- COSL

Tech Drilling Pan-

COSL PT COSL

Pacific Singapore Samudra(Singapore) (Labuan ) Capital Ltd. Timur

Norwegian

LTD Ltd (the “Issuer”) Santosa

AS

Competitive Strengths

The Company has a unique integrated business model offering services that cover the entire value chain

of the offshore oilfield services industry

The Company offers a wide range of oilfield services through four main business segments namely drilling

services well services marine support services geophysical acquisition and surveying services segments.The Company’s high-quality services cover the entire oilfield life cycle and the full value chain of the

oilfield services industry from exploring for oil and gas deposits and acquiring and processing geological

data to drilling well completion and to supporting oil and gas production activities such as offshore marine

support. For each sector in which the Company’s individual business segment operates the Company has

established a leading market position in offshore China and the Company believes it is well-positioned to

capture business opportunities in overseas markets. The Company’s integrated operation model allows it to

–– 57 ––enjoy the synergies among its business segments and cross-sell its services. Clients can also benefit from the

Company’s integrated business model by receiving packaged services and products without negotiating with

or coordinating with multiple providers. As part of its integrated business model the Company is reducing

capital intensity by actively growing its well services business and raising technical thresholds and

competitiveness in the offshore oilfield services industry. The Company has built an integrated business

model that mitigates industry cyclicality and has developed integrated project management capability to

offer clients a “one-stop” service. The Company’s integrated project management programme or IPM

programme packages and customises the Company’s various services and products to meet customers’

specific requirements. The Company manages its drilling turnkey contracts under its IPM programme which

typically includes the Company’s drilling well services and marine support services. The Company believes

this also allows it to achieve cost savings and accumulate in-depth knowledge of the geological conditions of

the basins in which it operates and the operating specifications of relevant projects in such basins compared

to competitors who operate in narrower business lines.In addition by offering comprehensive services involving the entire oilfield life cycle and the full value

chain of the oilfield services industry the Company is also able to diversify its revenue streams and reduce

its exposure to risks associated with fluctuation of demand in any single service segment attributable to the

exploration and development cycles. The Company believes its integrated business model has helped it

achieve and maintain competitiveness in the offshore oilfield services industry.The Company has established a dominant market position in offshore China through its strategic

relationship with CNOOC and engages in diverse international operations

The Company is the largest integrated oilfield services provider with a dominant market position in offshore

China. The Company possesses the largest fleet of offshore drilling rigs and related offshore drilling and

well services equipment in China and also operates and manages the largest offshore operation fleet with

the most comprehensive functions in China. As at 30 June 2025 the Company operated and managed a total

of 60 drilling rigs (of which 46 are jack-up drilling rigs and 14 are semi-submersible drilling rigs). Over the

last 40 years the Company has successfully established and maintained a long-term strategic relationship

with CNOOC Limited a subsidiary of CNOOC and the dominant exploration and production company in

offshore China. The PRC government views its offshore oil and gas resources with strategic importance as

the reliable supply of oil and gas is essential for its economic growth and has implemented a number of

laws and regulations to promote the development of offshore oil production and oilfield services

technologies. In 2019 the PRC government also approved a “Seven-Year Action Plan” to encourage

exploration and production of oil and gas in China. As a result of the approval of the Seven-Year Action

Plan major China oil and gas production companies including CNOOC PetroChina and Sinopec have

approved their respective plans to increase capital expenditure for exploration and production. CNOOC as

the main player in the offshore China oil and gas industry holds exclusive right from the PRC government

to enter into PSCs with foreign partners relating to the petroleum resources exploitation in offshore China.CNOOC assigned CNOOC Limited all of its rights and obligations under then-existing PSCs in 1999 and

has undertaken to assign CNOOC Limited its future PSCs except for those relating to CNOOC’s

administrative functions. The Company benefits from its strategic relationship with CNOOC Limited by

participating in nearly all of CNOOC’s offshore China projects and receiving support from CNOOC for the

Company’s R&D projects and financing activities. During 2023 and 2024 the Company has deeply

implemented its “Seven-Year Action Plan” focused on new strategies and new goals systematically

improved the reliability and stability of equipment production. The Company believes that its dominant

market position and extensive knowledge as well as its strategic relationship with CNOOC will enable it to

maintain its leading position in offshore China which is one of the largest offshore oil and gas basins in

Asia.–– 58 ––The Company has also successfully entered into overseas oilfield services markets in regions that have large

oil and gas reserves including Asia Pacific Middle East Americas Europe and Africa. For the years ended

31 December 2022 2023 and 2024 and for the six months ended 30 June 2024 and 2025 revenue from

business outside of China represented approximately 17.6% 21.5% 22.5% 24.6% and 23.7% respectively

of the Company’s revenue. The Company’s growth in overseas businesses was partly due to its strong

relationship with CNOOC Limited and CNOOC Limited’s overseas expansion but also partly due to the

Company’s strengthened relationship with non-affiliated customers such as PTTEP Saudi Aramco Equinor

Sinopec PetroChina Pertamina Petronas and TotalEnergies and the cost competitiveness and reliability of

services provided by the Company. The Company believes that the diversified geographic coverage of its

business further strengthens its industry position provides exposure to new business environments and

technologies and enables it to optimise its revenue structure to mitigate risks associated with ever-changing

demands for its services and products from different geographic markets.The Company benefits from a competitive cost structure robust operating margins and steady cash flows

The Company’s integrated business model reduces the uncertainties surrounding the specifications of the

demanded products or services and the near future workflow for each business segment. Moreover the

Company’s close relationship with its largest customer CNOOC Limited and the Company’s strategic role

within the CNOOC Group further reduce the uncertainties related to the demand and pricing of the

Company’s services and enable it to maintain a stable utilisation rate. The Company’s calendar day

utilisation rate of its drilling rigs for the years ended 31 December 2022 2023 and 2024 and for the six

months ended 30 June 2024 and 2025 was 78.5% 79.9% 78.0% 80.8% and 91.2% respectively.The Company has operated in offshore China for over 40 years and is the largest integrated oilfield services

provider with a dominant market position in offshore China enabling the Company to benefit from solid

logistics support the economy of scale and the resulting higher margins. The Company has also maintained

prudent capital expenditure plans cost savings initiatives and stringent working capital management policies.For instance the Company closely monitors the progress of its oilfield services projects to control costs and

reviews its budget plan from time to time to allow management to make timely adjustment. In addition the

Company also maintains its competitive cost structure by applying new technologies to improve its

operational efficiency and leveraging the technologies developed by the Company’s R&D department to

reduce expenses for outsourced technologies. Furthermore the Company has further improved its

competitiveness by entering into flexible leases for the Company’s rigs most of which are short term

back-to-back leases under which there is no extra rent or penalty for unexpected suspension or termination

of projects. The Company also adjusts its leasing plan to changes in market conditions on a regular basis.In addition the PRC government authorities have designated the Company as a high and new technology

enterprise which enjoys a 15% preferential corporate income tax rate significantly lower than the ordinary

25% corporate tax rate. These factors enable the Company to efficiently allocate resources decrease cost

base and realise a robust EBITDA margin and a steady cash flow. For example for the years ended 31

December 2022 2023 and 2024 and for the six months ended 30 June 2024 and 2025 the Company’s

EBITDA margin was 24.9% 24.8% 24.4% 26.2% and 27.8% respectively. For the years ended 31

December 2022 2023 and 2024 and for the six months ended 30 June 2024 net cash inflows from the

Company’s operating activities was RMB6898.9 million RMB13091.7 million RMB10984.7 million and

RMB1714.2 million respectively. For the six months ended 30 June 2025 net cash outflows from the

Company’s operating activities was RMB494.7 million.The Company has a strong R&D capability and has actively invested in updating its equipment

R&D capability and equipment and facilities with updated technologies are major competitive advantages of

the Company’s business. In line with its technology-driven strategy set out in 2021 the Company is devoted

to developing technologies through its in-house R&D teams and has established several research institutes in

–– 59 ––China. The Company’s R&D efforts are focused on technologies related to its well services drilling services

and geophysical acquisition and surveying services. As at 30 June 2025 the Company owned 916 valid

patents for invention 506 valid patents for utility model and one valid design patent and has applied to

register 1423 patents with the China National Intellectual Property Administration. For the years ended 31

December 2022 2023 and 2024 and for the six months ended 30 June 2024 and 2025 the Company’s R&D

expenditure amounted to RMB1.3 billion RMB1.6 billion RMB1.8 billion RMB0.8 billion and RMB0.8

billion respectively. Through its research institutes the Company has developed and commercialised a

number of advanced technologies. For instance in terms of exploration technologies “Haijing” a complete

set of marine seismic exploration towed streamer equipment has successfully completed the overseas

seismic exploration technical service operation in Southeast Asia which received full recognition from

overseas markets; and the integrated core sampling and logging instrument enabled the collection of gas

liquid and solid samples for oil and gas exploration in a single operation. The large-scale application

capability of the “Xuanji” system has been continuously enhanced and the full-scale downhole instrumenthas the capability of “rotary steerable system + edge exploration + four lines + autonomous high-speedpulse”. Also the “Haihong” well completion system has been successfully applied in domestic offshore

oilfields for over 8000 well times realizing the large-scale applications of a full series of software tools

and experimental detection platforms and effectively improving the autonomy level of China’s offshore well

completion industry. In addition the “Haiheng” drilling fluid system is a core technology for oil and gas

drilling and completion engineering. Currently it is the only drilling fluid system in the world with the

capability of maintaining stable rheological properties under a temperature differential of 190°C effectively

ensuring safe and efficient drilling operations in complex deepwater and ultra-deepwater environments. The

“Haiheng” system has been widely applied in global deepwater and ultra-deepwater drilling projects

successfully setting a water-depth record in the Western Pacific and providing strong technical support for

the efficient exploration and development of marine oil and gas resources.The Company has self-developed the “Welleader” rotary steerable drilling and “Drilog” logging-while-

drilling system and presented the product in a major national science and technology achievements

exhibition in China which was awarded the Science and Technology Special Progress Award of Tianjin in

2019. It has been applied in large-scale industrial applications and successfully completed the offshore 3D

anti-collision prevention and barrier drilling operations of first level difficulty. The Company self-developed

the first set of tow-streamer seismic acquisition equipment for marine oil and gas exploration which has

been formally put into service in the 3D seismic acquisition operations. Also the Company self-developed

an Enhanced Imaging System (“EIS”) which was awarded the Second Class State Science and Technology

Progress Award in 2008 by the Ministry of Science and Technology of China. In addition the Company’s

MRCT (Maximum Diameter Rotary Sidewall Coring Tester) was awarded the first prize of Tianjin

Technological Invention in 2020. The Company has delivered multiple original R&D achievements with

two technologies (i.e. CCUS Cementing Technology and Thru-Casing Density Logging Technology)honored by the OTC Spotlight on New Technology Award in 2024. See “Business of the Group – Researchand Development”.Capitalising on its intellectual properties the Company has strengthened its technological capability and

competitiveness

The Company has invested and will continue to invest in updating and upgrading its equipment and facilities

with advanced technologies including increasing seismic operation capacity developing or acquiring high

specification marine support vessels and replacing older fleets with newer and highly specialised marine

support vessels. As at 30 June 2025 the Company’s drilling rig fleets had the capacity to operate in the

water at a depth of up to 10000 feet. The total number of drilling rigs operated and managed by the

Company increased from 12 as at 31 December 2002 to 60 as at 30 June 2025 effectively managing

resources to meet market demand for drilling services and ensure the Company’s competitiveness. In

addition the Company continues to develop its seismic operation capacity. As at 30 June 2025 the

Company owned five towing streamer seismic vessels five ocean bottom seismic vessels and four integrated

–– 60 ––marine survey and geotechnical vessels. The Company believes that its strong R&D capabilities and up-to-

date equipment and facilities allow it to realise higher utilisation rates with less downtime and increased

profit with higher value-added services.The Company enjoys robust financing capability

The Company maintains a good relationship with both domestic and international commercial banks

including China Development Bank The Export-Import Bank of China Bank of China Agricultural Bank of

China Industrial and Commercial Bank of China China Construction Bank Bank of Communications

China Merchants Bank China CITIC Bank China Minsheng Banking Corp. Ltd. HSBC and Standard

Chartered Bank. The Company also benefits from access to diversified funding sources including bilateral

loans syndicated loans and the debt and equity capital markets. Relying on financing from both PRC and

international banks the Company can utilise its resources on a global scale and receive comprehensive

support for its overseas investments and operations. As the Company is the largest integrated oilfield

services provider with a dominant market position in offshore China the Company is rated A3 by Moody’s

and A- by Fitch which enabled it to achieve low costs in offshore financing and further broaden its funding

channels in the international market. As at 30 June 2025 the Company had total credit facilities of

RMB43.0 billion of which RMB37.1 billion was undrawn.In addition the Company has established a sound and diversified financing structure with a reasonable

composition of long-term and short-term debts and Renminbi-denominated and U.S. dollar-denominated

debts thereby maintaining sufficient lines of credit. As at 30 June 2025 42.3 per cent of the Company’s

total liabilities was denominated in Renminbi and 57.7 per cent of the Company’s total liabilities was

denominated in U.S. dollars. As at 30 June 2025 28.8 per cent of the Company’s total liabilities was long-

term debt and 71.2 per cent of the Company’s total liabilities was short-term debt.The Company has a highly experienced management team and a corporate culture that implements its

core values

The Company’s senior management team has in-depth experience in the offshore oil and gas service industry

with an average experience of more than 20 years in the energy industry and abundant experience in

working with multinational oil and gas companies including establishing and managing several joint

ventures with foreign parties.The Company has established a corporate culture characterised by its core values of integrity dedication

collaboration and self-discipline. The Company has also set up a quality health safety and environment

management system which complies with international standards such as the ISO14001 environmental

management standard and the ISO45001 occupational health and safety standard and the ISO9001 quality

management standard. In order to implement these principles and systems the Company has set up a

comprehensive internal control system supervising and managing each aspect of its operations. By virtue of

these principles and strict implementation of its internal policies the Company has achieved a strong

reputation among its customers for quality services and high safety standards.Business Strategies

Amidst evolving industry dynamics the Company is comprehensively focused on five development

strategies – “technology-driven strategy” “cost-leadership strategy” “integration strategy”

“internationalisation strategy” and “regional development strategy”. Guided by a new development

philosophy the Company is committed to a strategic transition from asset-heavy operations towards a model

that prioritises technology and asset-light approaches. With balanced emphasis on both domestic and

international markets as well as coordinated advancement across offshore and onshore sectors the Company

strives to enhance its professional technical services and support capabilities.–– 61 ––The Company is accelerating technological innovation embracing internationalisation exploring new energy

business opportunities and driving digitalisation and intelligent transformation. Through these concerted

efforts by 2030 the Company will have built a world-class energy service company with Chinese

characteristics in all respects.Technology-driven strategy: Always focus on basic scientific exploration applied scientific verification

and industrial application guidance with perspective of the industry and development so as to promote the

systematization and standardization of research and development system. The Company will continue to

enhance the core competitiveness of technology with greater determination and pragmatism and make

technology development the core engine that drives the Company’s development. The Company will also

accelerate the leapfrog advancement of major technology products from keeping pace to taking the lead and

focus on creating a characteristic digital technology product ecosystem and service system.Cost-leadership strategy: Reshape the cost advantage enhance the ability of cost control and formulate its

competitiveness. The Company deeply roots the concept of creating value for customers in its value and well

integrates its business into the customer value chain. Relying on our efforts of creating added value for

customers the Company can improve customer investment efficiency and returns.Integration strategy: Taking comparative advantage of the Company’s complete professional chain

increasing product categories and complete business chain the Company re-understands defines and

expands the meaning of integration. The Company will establish new integration model so as to achieve

benefits and efficiency to the greatest extent. The Company will also promote the development of integrated

business of COSL and continuously provide value-added services for customers making integrated services

as breakthrough and value-added tool for the transformation and upgrading of various traditional businesses

so as to expand the main segment and increase market share for the Company.Internationalisation strategy: Expand the simple market internationalization into the internationalization of

global comprehensive governance build a world-class governance ability and further develop the space for

surviving and operating as the world-class energy service companies in order to organically complement the

domestic market with the international market for the Company’s better development. Further the Company

will continuously shape the “1+2+N” market pattern with “the domestic market as the solid base andexpansion to the Middle East and Southeast Asia as the two wings which drives the benign development ofseveral potential overseas regions”.Regional development strategy: Fully exploit domestic oil companies’ comparative advantages of solid

reserves management fine reservoir engineering research and practical process technology complemented

by an all-round fully integrated and partially integrated business model involving exploration development

engineering and production together with profitable models of service product sales and equipment leasing

so as to promote the balanced development of the full range of businesses in the region and the

implementation of global strategy with lower costs and risks.Recent Developments

Overview of the results for the nine months ended 30 September 2025

For the nine months ended 30 September 2025 the Company experienced a significant increase in net profit

attributable to shareholders of the Company as compared with the same period in the preceding year mainly

due to the improved occupancy rate of the large-scale equipment of the Company and the smooth operation

of high daily-rate project of semi-submersible rigs in North Sea which propelled the growth in profits. For

the nine months ended 30 September 2025 the Company experienced a significant decrease in net cash flow

from operating activities as compared with the same period in the preceding year mainly due to the fact that

certain business were to be settled.–– 62 ––Potential investors must exercise caution when using such information to evaluate our financial condition

and results of operations. Such financial information for the nine months ended 30 September 2025 should

not be taken as an indication of our expected financial condition or results of operations for the full financialyear ending 31 December 2025. See “Risk Factors – Risks Relating to the Company’s Business – Potentialinvestors should not place undue reliance on our unaudited and unreviewed financial information or the

discussion of material financial trends in relation to our unaudited and unreviewed financial information asat and for the nine months ended 30 September 2025”.Entering into the Master Services Framework Agreement

The Company has entered into the 2025 Framework Agreement with CNOOC on 29 October 2025. Pursuant

to the 2025 Framework Agreement the Group has agreed to continue to provide the oilfield services

(including drilling services well services marine support services geophysical acquisition and surveying

services and new energy business services) to the CNOOC Group and the CNOOC Group has agreed to

continue to provide the machineries for leasing kinetic energy supply and transportation of materials wharf

services construction services energy services labour services utilities and other ancillary services as well

as the leasing of certain properties to the Group for the three years ending 31 December 2026 2027 and

2028.

Upon approval at the 2025 first extraordinary general meeting of the Company the 2025 Framework

Agreement will be effective from 1 January 2026.The Company’s Business

The Company listed on the Hong Kong Stock Exchange (HK stock code: 02883) and Shanghai Stock

Exchange (Shanghai stock code: 601808) is one of the leading integrated oilfield services providers in the world.The Company provides comprehensive services for the exploration development and production of oil and

gas through its four main business segments including drilling services well services marine support

services and geophysical acquisition and surveying services.* Drilling services segment. This segment mainly provides offshore drilling rigs supporting rigs land

drilling rigs drilling rigs management and oil casing services.* Well services segment. This segment mainly provides comprehensive among other things onshore

and offshore well services including logging drilling and completion fluids directional drilling

cementing well completion well work-over services oilfield waste treatment and oilfield production

stimulation services.* Marine support services segment. This segment possesses and operates a comprehensive offshore

utility transportation fleet comprised of vessels equipped for various operations through which the

Company provides a broad range of services.* Geophysical acquisition and surveying services segment. This segment offers offshore seismic

acquisition offshore seismic data acquisition offshore geo-surveying seismic data processing and

interpretation and fundamental construction and cable maintenance services.The following table sets forth revenue derived from each business segment and its respective percentage of

the Company’s revenue for the years indicated:

–– 63 ––Year ended 31 December Six months ended 30 June

20222023202420242025

RMB RMB RMB RMB RMB

(millions) % (millions) % (millions) % (millions) % (millions) %

Drilling services . . . . . . . . . . 10346.0 29.0 12067.5 27.4 13206.9 27.3 6416.8 28.5 7238.4 31.0

Well services . . . . . . . . . . . . 19599.7 55.0 25757.0 58.4 27655.4 57.3 12829.9 56.9 12378.1 53.1

Marine support services . . . . . 3725.0 10.4 3944.8 8.9 4769.1 9.9 2177.7 9.7 2608.8 11.2

Geophysical acquisition and

surveying services . . . . . . . 1988.2 5.6 2339.3 5.3 2670.2 5.5 1104.1 4.9 1095.0 4.7

Total . . . . . . . . . . . . . . . . . 35658.9 100.0 44108.6 100.0 48301.6 100.0 22528.5 100.0 23320.3 100.0

The following table sets forth profit from operations for each business segment for the years indicated:

Year ended 31 December Six months ended 30 June

20222023202420242025

RMB RMB RMB RMB RMB

(millions) % (millions) % (millions) % (millions) % (millions) %

Drilling services . . . . . . . . . . (635.5) (23.3) 739.7 15.2 373.1 7.4 372.8 13.8 686.4 23.6

Well services . . . . . . . . . . . . 3483.8 127.9 4052.0 83.5 4492.2 89.0 2244.5 83.4 2112.6 72.6

Marine support services . . . . . (58.8) (2.2) 38.0 0.8 107.2 2.1 101.3 3.8 158.6 5.5

Geophysical acquisition and

surveying services . . . . . . . (66.1) (2.4) 25.5 0.5 75.1 1.5 (26.6) (1.0) (49.0) (1.7)

Total . . . . . . . . . . . . . . . . . 2723.4 100.0 4855.2 100.0 5047.6 100.0 2692.0 100.0 2908.6 100.0

Business segment

Drilling Services Segment

The Company is the largest offshore drilling contractor in China and one of the most internationally well-

known drilling contractors. Under this business segment the Company mainly provides relevant drilling and

well completion services such as jack-up drilling rigs semi-submersible drilling rigs and land drilling rigs.As at 30 June 2025 the Company operated and managed a total of 60 drilling rigs (of which 46 are jack-up

drilling rigs and 14 are semi-submersible drilling rigs). The Company’s rig fleet can drill in a range of

water depths from 15 feet to 35000 feet. The Company offers drilling services on a stand-alone basis as

well as in conjunction with its well services marine support services.The Company provides drilling services both in China and overseas regions. The following table sets forth

details on the geographic locations of the Company’s drilling operations as at 30 June 2025:

–– 64 ––As at

30 June 2025

(units)

Drilling Rigs

China . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Overseas(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Note:

(1) These regions include Asia Pacific Middle East Americas and Europe.

The following table sets forth operation details for the Company’s jack-up and semi-submersible drilling rigs

for the periods indicated:

Year ended 31 December Six months ended 30 June

20222023202420242025

(days)

Operating days(1) . . . . . . . . . . . . . . . 16727 17726 17502 8961 9906

Jack-up drilling rigs . . . . . . . . . . . 13605 13830 14160 7038 7776

Semi-submersible drilling rigs . . . . 3122 3896 3342 1923 2130

Available day utilisation rate(2) . . . . . 83.5% 85.2% 83.4% 85.3% 93.4%

Jack-up drilling rigs . . . . . . . . . . . 88.2% 85.9% 85.5% 85.8% 94.6%

Semi-submersible drilling rigs . . . . 67.6% 83.0% 75.6% 83.5% 89.2%

Calendar day utilisation rate(3) . . . . . . 78.5% 79.9% 78.0% 80.8% 91.2%

Jack-up drilling rigs . . . . . . . . . . . 83.3% 80.9% 81.8% 82.4% 93.4%

Semi-submersible drilling rigs . . . . 63.0% 76.2% 65.2% 75.5% 84.0%

Notes:

(1) Operating days refer to the total days when the Company’s rigs are in operation.

(2) Calculated by dividing the total number of operating days in a particular year by the total number of days of availability

in that year. The total number of days of availability is calculated by subtracting the total number of preparation days in

the year from the total number of calendar days in that year. The total number of preparation days is the total number of

days required for repair and maintenance including upgrades.

(3) Calculated by dividing the total number of operating days in a particular year by the total number of calendar days in

that year.The Company’s rig utilisation is affected by various factors including market demand for the Company’s

services the Company’s operational efficiency and the maintenance and repair time for the Company’s rigs.The Company strives to improve and maintain its operational efficiency through upgrading the modules of

its rigs implementing advanced management methods and utilising advanced technologies.In the first half of 2025 the global demand for drilling rigs remained high as a whole and the regionalmarket showed the differentiation characteristics of “shrinkage in North America fluctuation in Middle Eastand expansion in emerging markets”. The Company seized the opportunity of overseas market to make greatefforts to develop large-amount long-term and high-value overseas projects consolidated the “industrialcontrol” with “new breakthrough” in resource utilisation efficiency continued to promote the construction of

–– 65 ––“offshore equipment design and construction center” and promoted the quality improvement and upgrading

of offshore oil and gas equipment manufacturing industry. In the first half of 2025 the Company continued

to progress with its existing drilling contracts with its drilling rigs having operated for 7776 days. In

addition the Company’s drilling services segment realised revenue of RMB7238.4 million for the six

months ended 30 June 2025.The following table sets forth the average day rates of the Company’s drilling rigs for the periods indicated:

Year ended 31 December Six months ended 30 June

20222023202420242025

(ten thousand US$/day(1))

Jack-up drilling rigs . . . . . . . . . . . . . 6.9 7.4 7.5 7.4 7.0

Semi-submersible drilling rigs . . . . . . 11.4 13.3 14.3 13.4 17.1

Drilling rigs average . . . . . . . . . . . . 7.8 8.7 8.8 8.6 9.1

Note:

(1) The translation of Renminbi amounts into U.S. dollar amounts for the years ended 31 December 2022 2023 and 2024

and for the six months ended 30 June 2024 and 2025 have been made at the rates of RMB6.9646 to US$1.00

RMB7.0827 to US$1.00 RMB7.1884 to US$1.00 RMB7.1268 to US$1.00 and RMB7.1586 to US$1.00 respectively.Drilling Contracts

The Company provides drilling services through (i) well-to-well contracts where the Company provides

services for a single well or a group of separate wells or (ii) term contracts where the Company agrees to

provide services for a specific period of time without specifying the number of wells. The Company’s well-

to-well contracts generally last for one to six months while its term contracts generally have a contract term

of more than one year.The Company’s drilling contracts can also be categorised into (i) fixed rate contracts or (ii) turnkey services

contracts based on pricing arrangements. Under the Company’s fixed rate contracts the Company generally

charges its clients based on fixed daily fees or day rates. Under its turnkey drilling services contracts the

Company typically receives a lump sum payment for drilling and drilling-related services for a specified

number of wells regardless of actual completion time and costs. For risks related with turnkey contracts see“Risk Factors – Risks Relating to the Company’s Business – Unexpected cost overruns and delays on theCompany’s turnkey projects could adversely affect the Company’s financial position and results ofoperations”.The Company’s customers typically pay by instalments based on the progress of the contracts. Under well-

to-well contracts the Company is typically responsible for the operating costs of the rig such as crew

wages rig maintenance costs and spare parts costs. The Company’s customers generally provide for the

costs of rig towing as well as mobilisation and demobilisation costs. Customers also pay for supplemental

services such as drilling fluids provision cementing casing logging and completion services.In general the Company’s drilling contracts terminate if the drilling unit experiences an actual or

constructive loss and may be terminated if drilling operations are suspended for a period longer than 10 to

20 days due to major repairs. In addition some of the Company’s contracts permit its customers to terminate

by giving notice and paying an early termination fee. In many cases the Company’s customers have the

option to extend the contract.–– 66 ––Well Services Segment

The Company is the main provider of China offshore well services together with the provision of onshore

well services. Through the continuous input in technology research and development advanced

technological facilities and excellent management teams the Company provides comprehensive

professional well services including but not limited to logging drilling & completion fluids directional

drilling cementing well completion well workover and stimulation.The Company offers onshore and offshore well services in conjunction with the Company’s own drilling

operations and on a stand-alone basis. Capitalising on its continuous investment in technology research and

development advanced technological facilities and a strong management team the Company provides a

broad range of well services which are primarily categorised into the following divisions:

Logging The Company provides a wide range of logging services for open-

hole and cased-hole exploration and production wells including

electric wire-line logging and pipe convey logging.These services use either wire or cable to lower sensors into a well

to collect and transmit data on the surrounding rock and petroleum

reservoir formations.Drilling and completion fluids The Company offers its customers drilling fluid design services

fluid compounds and related equipment used during operations.Drilling fluid or mud lubricates the drill bit and removes cuttings

during the drilling process. Drilling fluid also controls downhole

pressure and ensures the integrity of the well bore. The Company’s

drilling fluids typically are either water or oil based and consist of

mixtures of clay and chemicals to control specific downhole

conditions.In addition to drilling fluids the Company provides completion

fluids which are used to drill through petroleum reservoir rock

without damaging or clogging the surface of the formation. The

Company’s completion fluid designs use a clear brine or metallic

salt-based solution.Directional drilling The Company provides a complete line of directional drilling

services including directional horizontal slim hole directional and

cluster well drilling. Directional drilling technology enables the

Company to drill from various angles to reach specific reservoirs.This technology allows the Company to reach multiple and distant

geological targets from a single surface location.–– 67 ––Cementing The Company supports its drilling operations by designing special

cement compounds as well as providing cement mixtures and

leasing cementing equipment. Cementing is used to support and

strengthen the casing of exploration and development wells against

downhole formation pressures and unexpected pressure kicks. The

Company bolsters the well casing by pumping cement slurries into

the space between the metal well casing and the well wall. The

Company specially designs its cement slurries to meet various well

requirements such as density thickening time and compression

strength.Well completion The Company’s well completion services include casing design and

installation as well as reservoir treatments such as sand control and

acidisation. These treatments increase the productivity and lifespan

of a production well. After installing and cementing the well

casing the Company fractures the reservoir rock with holes called

“fracs” using specifically designed downhole explosives to increase

the petroleum flow rate. The Company can also treat carbonate

reservoir rock with acid solutions to dissolve drilling fluids that

have accumulated on the face of the reservoir rock.Well work-over After a well begins production the Company provides follow- up

maintenance and work-over services which increase the

productivity and extend the lifespan of a well. Work-overs

typically involve treating the reservoir rock with refracturing

sand control or acidisation and may include removing and

replacing the well casing and downhole tools. The Company

provides its work-over services on a turnkey basis and also offers

complete well work-over management programmes.Oilfield production stimulation The Company provides certain stimulation technology services such

as acidising fracturing water-plugging profile control and other

related well optimising services enhanced oil recovery (EOR)

thermal recovery chemical flooding gas- drives polymer injections

(including to artificial lift devices) nitrogen foam gas lifts induced

flow coiled-tubing units (CTU) and other related technologies.Oilfield waste treatment To ensure compliance with environmental regulations the

Company offers a proactive approach that provides clients with a

complete line of oilfield waste management and the Company is

committed to deliver highly efficient reliable and environment-

friendly services. The Company’s services include programme

design cutting collection and recover cutting injection and the

recovery of oil base drilling fluids.The Company strives to maintain its leading position in the PRC domestic well services market and actively

explore the overseas market with a focus on countries and regions with abundant oil and gas reserves

including Southeast Asia and Middle East.–– 68 ––The Company considers advanced technology vital to the success of its well services and plans to utilise the

latest tools and technology in its operations while continuously enhancing its science and technologyresearch and development capabilities. For details please see “Business of the Group – Research andDevelopment”.Well Services Contracts

The Company normally enters into well-to-well or term contracts for its well services. In the domestic

market most of the Company’s contracts are term contracts valid for one year. The Company generally wins

overseas well services contracts on a project basis through bidding. The Company also offers well services

in connection with its integrated project management programme or IPM programme. The Company

generally tailors its well services to specific requirements from the clients such as depth of well and nearby

geo-conditions. From time to time the Company also enters into stand-alone turnkey contracts for its well

services.Marine Support Services Segment

The Company operates and manages the largest offshore operation fleet with the most comprehensive

functions in China with over 200 vessels including AHTS vessels platform supply vessels and standby

vessels as at 30 June 2025. The Company can provide comprehensive support and services including anchor

handling for different water level towing of drilling rigs/engineering barges offshore transportation oil/gas

field standby firefighting rescue and oil spill assisting for offshore oil and gas exploration development

construction and oil/gas field production which can fulfill multidimensional needs of clients.The Company also provides transportation services through utility vessels the Company owned or leased

including transportation of platform supplies bulk materials fuel and water. In addition the Company also

leases utility vessels from time to time as a complement to its marine support and transportation capacities

to meet market demands.The Company faces increasingly intense market competition in the marine support and transportation

services market in China as the number of vessels utilised in this market increase. Capitalising on its proven

track record of safe operations effective integration of external resources and an experienced management

team the Company has successfully maintained a leading position in this industry in China.The operating days of the Company’s utility vessels are mainly determined by (i) the total vessels being

utilised and (ii) maintenance and repair days of vessels for the relevant periods. The following table sets

forth details of operating days of different types of utility vessels owned by the Company for the periods

indicated:

Year ended 31 December Six months ended 30 June

Operating days 2022 2023 2024 2024 2025

(days)

Standby vessels . . . . . . . . . . . . . . . . 11400 11573 11742 5809 8049

AHTS vessels . . . . . . . . . . . . . . . . . 21958 20964 34179 14408 20448

Platform supply vessels . . . . . . . . . . 16991 18408 24321 10269 11537

Multi-purpose vessels . . . . . . . . . . . . 2977 2953 2713 1503 1015

Work-over support barges . . . . . . . . . 1009 1394 1004 542 461

Total . . . . . . . . . . . . . . . . . . . . . . . 54335 55292 73959 32531 41510

–– 69 ––Marine Support Services Contract

The Company’s marine support and transportation services contracts generally have a contract period of one

year. The Company’s customers generally have the rights to suspend or terminate the relevant contracts. The

Company generally charges clients for marine transportation services based on the volume of goods and

transportation distance.Sub-contracting

Many of the Company’s marine support services are conducted through sub-contracting arrangements. The

Company’s contracts with subcontractors generally have contract terms of one year. For bareboat sub-

contracting the Company generally provides crew members while the Company’s subcontractors provide the

vessels only.In addition the Company believes that it has significant flexibility to plan and execute projects manage the

size of its operations implement cost control initiatives and source cost-effective subcontractors in the

development and operation of its marine support business.Geophysical Acquisition and Surveying Services Segment

The Company is a major supplier for China offshore geophysical acquisition and surveying services and a

solid competitor and a provider of effective and high quality service in the global geophysical exploration.As at 30 June 2025 the Company owned five towing streamer seismic vessels five ocean bottom seismic

vessels and four integrated marine survey and geotechnical vessels. Services for clients include but not

limited to providing services of wide azimuth broadband high density seismic acquisition services ocean

bottom cable and ocean bottom node multi-component seismic acquisition services as well as integrated

offshore surveying services.Geophysical Acquisition Services

Through its seismic vessels the Company offers seismic services to its clients. Seismic analysis is an

exploration method which uses sound waves to map subsurface geological formations. The Company’s

seismic fleet is equipped with modern seismic and navigational equipment and is capable of gathering both

two dimensional or 2-D and three dimensional or 3-D high resolution seismic data. 2-D seismic data is

often used in initial exploration to identify potential prospects while 3-D seismic is reserved for analysing

specific prospects before drilling.The details of geophysical acquisition of the Company are as follows:

Year ended 31 December Six months ended 30 June

Business 2022 2023 2024 2024 2025

(days)

2-D acquisition (km) . . . . . . . . . . . . 4619 13125 19951 11174 3557

3-D acquisition (km2) . . . . . . . . . . . . 15110 20281 27142 16370 9000

Ocean Bottom Cable (km2) . . . . . . . . 1655 1390 593 193 260

Ocean Bottom Node (km2) . . . . . . . . 639 701 1083 277 704

–– 70 ––Surveying Services

The Company offers surveying services through marine surveying vessels. The Company’s marine surveying

services include seabed topographical surveying soil sampling navigation oceanographic and marine

environmental studies soil geohazard studies seabed earthquake studies seabed foundation engineering and

submarine cable maintenance. After acquiring relevant data the Company analyses the results at its onshore

laboratory and processing centre in Tianjin and Zhanjiang China. The results of the analysis are then used to

place drilling rigs production platform and other engineering work at seabed.As at 30 June 2025 the Company owned four integrated marine survey and geotechnical vessels with

deepwater operation capabilities.Geophysical Acquisition and Surveying Service Contracts

The Company normally enters into contracts for specific exploration blocks with individual customers for its

geophysical acquisition and surveying services. Timing is usually of essence in the conduct of the

Company’s obligations under these contracts. The client will usually have the right to terminate the contracts

at its sole discretion without any liability to the Company.Sales and Marketing

Customers

The Company offers services to both domestic and overseas customers most of which are major oil and gas

companies such as CNOOC Limited PTTEP Saudi Aramco Equinor Sinopec PetroChina Pertamina

Petronas and TotalEnergies. The Company believes that its track record of safe operation its capacity to

offer a broad range of services and products and its advanced technology helped it establish long-term

relationships with its customers. Through years of efforts the Company has established an extensive

business network primarily consisting of branch offices and subsidiaries which covers China and overseas

markets including Asia Pacific Middle East Americas Europe and Africa.The Company’s largest customer is CNOOC Limited the largest producer of offshore crude oil and natural

gas in China. CNOOC holds exclusive right from the PRC government to enter into PSCs with foreign

partners relating to petroleum resources exploitation in offshore China. CNOOC assigned CNOOC Limited

all of its rights and obligations under then-existing PSCs in 1999 and has undertaken to assign CNOOC

Limited its future PSCs with the exception of those relating to CNOOC’s administrative functions. The

Company also regularly enters into transactions with other members of the CNOOC Group. For the years

ended 31 December 2022 2023 and 2024 and for the six months ended 30 June 2024 and 2025 revenue

derived from CNOOC Group (excluding CNOOC Limited and its subsidiaries) represented 2.1% 1.4%

1.4% 0.4% and 0.7% respectively of the Company’s total revenue and revenue from CNOOC Limited and

its subsidiaries represented approximately 81.2% 80.6% 77.4% 76.7% and 76.9% respectively of the

Company’s total revenue for the same periods.The Company derives a substantial portion of its revenue from sales in China where the Company has a

leading market position in the oilfield services industry. In addition the Company has remained committed

to implementing its strategy to expand its presence in the global market and has successfully achieved

growth in overseas markets.The following table sets forth details of the Company’s revenue by geographic market for the periods

indicated:

–– 71 ––Year ended 31 December Six months ended 30 June

Revenue by geographic market 2022 2023 2024 2024 2025

RMB (millions)

Revenue sourced in the PRC . . . . . . . 29384.4 34638.3 37417.0 16975.5 17802.1

Revenue sourced outside the PRC . . . 6274.5 9470.3 10884.6 5553.0 5518.2

Total . . . . . . . . . . . . . . . . . . . . . . . 35658.9 44108.6 48301.6 22528.5 23320.3

Integrated Project Management

The Company offers its customers an integrated project management programme or IPM programme. This

programme packages and customizes the Company’s various services and products to meet customers’

specific requirements. The Company manages its drilling turnkey contracts under its IPM programme which

typically includes the Company’s drilling well services and marine support services.Marketing

The Company’s International Business and Marketing Department is responsible for coordinating its PRC

and overseas marketing efforts. In line with its strategy to expand its overseas operations the Company will

continue to strengthen its marketing efforts in various overseas regions in particular those areas with

abundant oil and gas reserves. Please see “Business – Overseas Business Development”.Pricing Policy

The Company usually participates in competitive bidding for contracts. When the Company conducts

business in certain geographic markets or service areas where only a limited number of competitors operate

the Company may also enter into contracts through negotiation under which the price is generally

determined by several factors including prevailing local market economic conditions specifications of the

products or the services the Company provides the volume of the business length of the contracts the

package of services and geographic conditions of the projects. Given CNOOC Limited’s dominant position

in the offshore China market and based on the various considerations described above the Company has

been offering CNOOC Limited preferential rates on certain services the Company provides. These discounts

are also available to other major customers.Overseas Business Development

Capitalizing on the Company’s long-term relationship with its clients and its capacity to offer

comprehensive services the Company has successfully entered into oilfield services market in many

overseas regions which have abundant oil and gas resources through the following ways: (i) setting up

subsidiaries and branches at relevant geographic markets through organic growth or acquisitions; or (ii)

participating in overseas projects through public bidding or offering services to multinational companies

operating in the regions.The Company has established subsidiaries branches and joint ventures in overseas jurisdictions that the

Company considers strategically important for its business expansion and operations including Middle East

Southeast Asia Europe Africa and Americas. These overseas institutions provide the Company’s customers

with convenient access to its products or services and also enable the Company to better learn the global

market trends and the needs of its international customers.–– 72 ––The following are major recent developments in the Company’s overseas business:

* In Middle East the performance of the Company’s jack-up drilling rigs achieved increasingly positiveassessment since the commencement of their operations in Saudi Arabia. Two rigs “OrientalPhoenix” and “Oriental Dragon” provide services for KOC becoming the first contractor to offer

offshore drilling services to Kuwait in four decades.* In Canada the Company continuously provides integrated drilling completion and associated services

to CPNA and keeps securing new work volumes.* In Brazil semi-submersible drilling rig “NH8” has won the Petrobras’ project and entered the local

offshore drilling service market for the first time.* In Africa the Company successfully expanded the sales of products such as “Xuanyue” and “Xuanji”

and promote the “service+sales” model. The Company has also consistently maintained high-

efficiency operational performance in the TotalEnergies’s TL Project.* In Europe all four semi-submersible rigs are active in the North Sea market. High day rate contracts

have been signed with a contract term extending until 2030. The operational quality and profitability

of COSL Drilling Europe have significantly improved. In 2024 the Company commenced EOR

analysis complementing its existing drilling service in the region.* In Southeast Asia the Company continuously expand new businesses in the Southeast Asian

countries. The Company has successively secured multiple projects in areas such as cementing mud

engineering offshore seismic acquisition and drilling for PTTEP in Thailand and cementing

wireline logging and perforation and workover services for PERTAMINA in Indonesia.* In Americas the Company continuously enhanced its integrated service capabilities in North

America. In South America the Company’s drilling services entered into the implementation phase

further enriching its local service portfolio and effectively supporting the high-quality development of

oil and gas projects.Competition

The Company competes against domestic and international oilfield service providers operating in offshore

China and overseas regions. There was increasing competition in the offshore China oilfield services market

as this market became open to more market participants including both multinational companies and

government-sponsored enterprises. In the offshore China market the Company competes against local

companies that specialise in a particular market segment or regions and multinational companies that possess

technological advantages over most local companies. In overseas markets the Company’s main competitors

are global oilfield service providers such as Halliburton Company or SLB. Many of these companies possesssignificantly greater resources and operating experience than the Company does. Please see “Risk Factors –Risks Relating to the Company’s Industry – The Company is subject to intense competition in the markets in

which the Company carries out its operations which could limit the Company’s ability to maintain or–– 73 ––increase its market share or maintain its prices at profitable levels”. The Company competes primarily on the

basis of its prices safety record operational capacity equipment and technology crew and quality of

services.* Drilling services segment. In offshore China the drilling services market the Company mainly

competes against domestic competitors including associates of CNPC Group and the Sinopec Group.Foreign drilling companies occasionally operate in the offshore China market and their rigs usually

enter the market when local drilling rigs are unavailable. In overseas drilling services markets the

Company mainly competes against large multinational companies that operate in the relevant region.* Well services segment. In the offshore China well services market the Company faces competition

from domestic companies including associates of the CNPC Group and the Sinopec Group. Large

multinational companies with strong technological capabilities are the Company’s main competitors

in this market both in offshore China and overseas regions. In recent years the Company has self-

developed a number of advanced well service technologies including technologies to conduct thermal

recovery of heavy oil and cement slurry for deep-water cementing which the Company believes will

help it maintain and enhance its market position in this industry.* Marine support services segment. In the offshore China market the Company primarily competes

against associates of the CNPC Group and the Sinopec Group. The Company is the market leader in

offshore China market for marine support services serving large multinational companies including

CNOOC Limited and SK Limited. In recent years as the number of vessels utilised in this market

increased the competition has become more intense. Overseas markets for the Company’s marine

support services segment includes Indonesia and Australia and the Company currently possesses four

barges in Indonesia and two PSVs in Australia.* Geophysical acquisition and surveying services segment. In offshore China market the Company

faces competition from domestic companies and international companies. Competitors in this sector at

overseas markets are primarily foreign companies equipped with advanced technology and equipment.The Company has successfully entered overseas markets such as Argentina and Indonesia but the

Company faces strong competition in those markets.Suppliers

The most important raw materials and supplies used in the Company’s operations are chemicals fuel steel

wires cement drill pipes and drill collars. The Company purchases these materials and supplies primarily

from suppliers located in the PRC. The Company conducts a bidding process to determine its suppliers.Research and Development

The Company is devoted to developing technologies through its in-house research and development team

and has established several research institutes in China. The Company’s R&D efforts are focused on

technologies related to its well services drilling services and geophysical acquisition and surveying services.In 2024 the Company invested RMB1.8 billion into technology development and undertook 197 scientific

research programmes at all levels. In the first half of 2025 the Company invested RMB0.8 billion into

technology development and undertook 267 scientific research programmes at all levels. The Company was

granted 131 patents during 2024 of which 98 patents were invention patents and was granted 103 patents

during the first half of 2025 of which 95 patents were invention patents. The Company’s efforts have

resulted in breakthroughs and material achievements in many areas and have commercialised a number of

advanced technologies that the Company developed. For example the Company’s MRCT (Maximum

Diameter Rotary Sidewall Coring Tester) was awarded the first prize of Tian Technological Invention in

2020.

–– 74 ––In 2011 the Company was certified as a high and new technology enterprise by relevant PRC authorities at

the Tianjin Municipal level. The Company has applied to renew its certification in 2014 2017 and 2020 and

each of the renewal applications has been approved. The Company’s renewed High and New Technology

Certificate is effective for a period of three years from 2023 to 2025.The Company’s major research and development achievements in recent years include the following

projects:

* Self-development of “Welleader” rotary steerable drilling and “Drilog” logging-while-drilling system

which has been applied in large-scale industrial applications and successfully completed the offshore

3D anti-collision prevention and barrier drilling operations of first-level difficulty.

* Self-development of ESCOOL a high temperature and high speed image well logging system with a

maximum working temperature of 235°C and a fibre data transfer speed of 1Mbps.* Self-development of a marine seismic acquisition system characterised with high precision and small

trace spacing.* Self-development of a set of comprehensive technologies to conduct thermal recovery of heavy oil

which has been implemented in many offshore projects in China.* Self-development of well completion tools that successfully passed the HTHP tests.* Self-development of HTO-Drill an oil-based high temperature and high density drilling fluid system.* The self-developed cement slurry for deep-water cementing successfully passed an on-site deep-

water test indicating that the Company possesses the capability of carrying out deep-water

cementing.* The Company has made breakthroughs in updating and developing advanced self-elevation drilling

platform technologies through its in-house research and development team.* The self-developed “Haimai” was selected in the fourth batch list of the first major technical

equipment in the energy field in China which played an important role in the reserve and production

output improvement of oil and gas resources in China and provided a solid guarantee for safeguarding

national energy security.* “Haijing” a complete set of marine seismic exploration towed streamer equipment has successfully

completed the overseas seismic exploration technical service operation in Southeast Asia which

received full recognition from overseas markets.* The large-scale application capability of the “Xuanji” system has been continuously enhanced andthe full-scale downhole instrument has the capability of “rotary steerable system + edge exploration +four lines + autonomous high-speed pulse”.* The “Haihong” well completion system has been successfully applied in domestic offshore oilfields

for over 8000 well times realizing the large-scale applications of a full series of software tools and

experimental detection platforms and effectively improving the autonomy level of China’s offshore

well completion industry.–– 75 ––* The “Haiheng” drilling fluid system is a core technology for oil and gas drilling and completion

engineering. Currently it is the only drilling fluid system in the world with the capability of

maintaining stable rheological properties under a temperature differential of 190°C effectively

ensuring safe and efficient drilling operations in complex deepwater and ultra-deepwater

environments. The “Haiheng” system has been widely applied in global deepwater and ultra-

deepwater drilling projects successfully setting a water-depth record in the Western Pacific and

providing strong technical support for the efficient exploration and development of marine oil and gas

resources.As at 30 June 2025 the Company’s research and development team consisted of 1777 employees 882 of

whom held a master’s degree or above.Intellectual Properties

The Company’s patents trademarks service marks copyrights licences and various know-how and trade

secrets protect its proprietary technology. As at 30 June 2025 the Company owned 268 trademarks with 23

overseas trademarks.As at 30 June 2025 the Company owned 916 valid patents for invention and 506 valid patents for utility

model. The Company’s intellectual property rights collectively represent a material business asset. However

the Company does not believe that any individual intellectual property right or related group of intellectual

property rights is of such importance that its expiration or termination would materially affect the

Company’s business.Quality Health Safety and Environmental Protection

The Company has implemented a quality health safety and environment management system which is

similar to that employed by other international oilfield service companies. Under this management system

the Company closely monitors and records health and safety incidents and promptly reports them to

government agencies and organisations.The Company has adopted the ISO9001 quality management standard in regards to offshore drilling

services. The Company has also adopted the ISO14001 environmental management standard and the

ISO45001 occupational health and safety standard.The Company treats environmental protection with high importance and considers it crucial for the

sustainable development of its operations. The Company has strictly abided by international conventions

international and domestic laws and regulations and various requirements concerning environmental

protection. The Company has strengthened its recycling of pollutants strictly controlled emissions and has

endeavours to minimise damage to the environment.The Company’s operations are subject to the hazards and risks inherent in the exploration drilling and

production of oil and gas including fires explosions encountering formations with abnormal pressures

blowouts cratering and natural disasters any of which can result in loss of hydrocarbons environmental

pollutions and damages to the Company’s properties or equipment. In addition certain of the Company’s

operations are located in areas that are subject to tropical weather disturbances such as typhoons some of

which can be severe enough to cause substantial damage to facilities and interrupt production. The Company

may also encounter business interruptions caused by political disturbance in the areas in which the Company

operates.–– 76 ––Insurance

As part of the protection against operating hazards the Company maintains insurance coverage on its

properties and equipment including rigs vessels other machinery and supplies. The Company maintains

different types of insurance policies including insurance for liabilities property all risks insurance hull

insurance insurance for vessels under construction overseas medical services insurance accident insurance

and mandatory social security insurance for its employees.The Company also purchases third-party liability insurance policies to cover (i) claims made against it by or

on behalf of individuals who are not Company employees in the event of personal injury or death and (ii)

legal liabilities for environmental damages resulting from the Company’s onshore or offshore activities

including oil spills.In addition our long-term cooperation strategy enables the Company to maintain insurance coverage at

favourable rates and reduce costs. The Company believes that its level of insurance is adequate and

customary for the PRC oilfield services industry and international practises. However the Company may not

have sufficient coverage for some of the risks the Company faces either because insurance is not available

or because of high premium costs. For instance the Company’s insurance does not cover internal

disturbances business interruption expropriation or nationalisation. In addition pollution and similar

environmental risks generally are not fully insurable and the Company may be liable for oil spills the costs

of controlling a wild well well loss or damage and similar matters. Losses and liabilities arising from

uninsured or underinsured events could have a material impact on the Company’s results of operations.Please see “Risk Factors – Risks Relating to the Company’s Business – The Company’s businesses aresubject to risks related to extreme weather operational risks and other hazardous conditions that may not befully covered by its insurance policies”.Properties

The Company’s headquarters are located in 201 Haiyou Avenue Yanjiao Economic & Technological

Development Zone Sanhe City Hebei Province PRC. As at the date of this Offering Circular the Company

was not involved in any material litigation or disputes regarding its use of the leased buildings.Employees and Employee Benefits

As at 30 June 2025 the Company had 15270 in-service employees 2015 of whom were foreign employees.The total remuneration for employees includes salary bonuses and allowances. Bonus for any given period

is based primarily on the performance of the individual and the Company. Employees also receive health

benefits and other miscellaneous subsidies.All full-time employees in the PRC are covered by a government-regulated pension and are entitled to an

annual pension at their retirement dates. The PRC government is responsible for the pension liabilities to

these retired employees under this government pension plan. The actual pension payable to each retiree is

subject to a formula based on the status of the individual pension account general salary and inflation

movements. The Company is required to make monthly contributions to the government pension plan. The

contributions vary from region to region.As at 30 June 2025 the Company employed 2015 foreign employees through whom the Company manages

and operates its business operations in overseas markets including Asia Pacific Middle East Americas

Europe and Africa. The Company provides benefits to expatriates that the Company believes to be in line

with customary international practises or local labour laws. Local staff employed by the Company’s overseas

subsidiaries enjoy the welfare benefits mandated by local laws and regulations.–– 77 ––The Company has not been subjected to any strikes or other labour disturbances and believes that relations

with employees are good.The Company has the union that protects employees’ rights organises educational programs assists in the

fulfilment of economic objectives encourages employee participation in management decisions and assists

in mediating disputes between the Company and individual employees.Legal Proceedings

Taxation Dispute between COSL Mexico S.A. de C.V. and Mexican Tax Authority

As at 30 June 2025 COSL Mexico S.A. de C.V. a wholly owned subsidiary of the Group in Mexico is

subject to tax obligation in Mexico. COSL Mexico S.A. de C.V. is involved in a tax dispute with the

Mexican Tax Administration Service. After consulting relevant legal advisors and conducting a thorough

assessment the management of the Company has recognised provision for which the tax liability is

probable. Different views taken by the Group and the Mexican tax authority over the interpretation and

implementation of tax laws and regulations may increase the Group’s tax liabilities. The management of the

Group is continuously assessing the possible future impact of the above tax matter and will maintain close

communication with the tax authority.As at the date of this Offering Circular except as disclosed in this Offering Circular the Company was not

involved in any material litigation or arbitration and no material litigation or arbitration were pending

threatened or made against the Company.–– 78 ––MANAGEMENT

Directors

The members of the Board are as follows:

Name Age Position

Executive Directors

Zhao Shunqiang . . . . . . . . . . . . . . . 57 Chairman Executive Director and CEO

Lu Tao . . . . . . . . . . . . . . . . . . . . . 57 Executive Director

Employee Representative Director

Xiao Jia . . . . . . . . . . . . . . . . . . . . 43 Employee Representative Director Deputy Party

Secretary and Chairman of Labour Union

Non-Executive Directors

Fan Baitao . . . . . . . . . . . . . . . . . . 50 Non-Executive Director

Liu Qiudong . . . . . . . . . . . . . . . . . 53 Non-Executive Director

Independent Non-Executive Directors

Chiu Lai Kuen Susanna . . . . . . . . . 66 Independent Non-Executive Director

Kwok Lam Kwong Larry . . . . . . . . 70 Independent Non-Executive Director

Yao Xin . . . . . . . . . . . . . . . . . . . . 47 Independent Non-Executive Director

Executive Directors

Mr. Zhao Shunqiang Chinese born in 1968 Chairman Executive Director and CEO of COSL senior

engineer graduated from China University of Petroleum (East China) with bachelor’s degree of drilling

engineering in 1990 and was granted EMBA of CEIBS in 2008. From July 1990 to November 2001 Mr.Zhao successively served as drilling foreman staff member of operating department and senior team leader

of China Offshore Oil Northern Drilling Company; from November 2001 to October 2002 he successively

served as Vice President of China Offshore Oil International Engineering Company and manager of BH9 of

China Offshore Oil Northern Drilling Company; from October 2002 to August 2004 he served as Vice

General Manager of Tianjin Branch of COSL; from August 2004 to November 2004 he served as Director

of Drilling Technology Institute (Tanggu) of COSL IPM Division; from November 2004 to December 2005

he served as General Manager of Tianjin Branch of COSL; from December 2005 to April 2012 he served as

General Manager of the Production Optimization Division of COSL while he also served as the Dean of

Production Optimization Research Institute from January 2011 to April 2012; from April 2012 to March

2018 he served as the Vice General Manager of CNOOC International Limited; from March 2018 to August

2020 he served as President of CNOOC Uganda Limited; from August 2020 to April 2021 he served as

President of COSL. Since October 2020 he has served as an Executive Director of COSL. He has served as

Chairman and CEO of COSL since April 2021. Mr. Zhao has over 30 years of experience in the oil and

natural gas industry.Mr. Lu Tao Chinese born in 1969 Executive Director of COSL is a professor-level senior engineer. He

graduated from the University of Electronic Science and Technology of China with major in electromagnetic

field and microwave technology and a master’s degree in 1993 and later was granted a doctorate degree in

measurement technology and instrumentation from the University of Electronic Science and Technology of

China. From April 1993 to July 1993 Mr. Lu served as research engineer at the Research Institute of China

–– 79 ––National Offshore Oil Logging Corporation and from July 1993 to October 1993 he had an intern at

Xinjiang Branch of China National Offshore Oil Logging Corporation. From October 1993 to January 2002

he served as research engineer at the Research Institute of China National Offshore Oil Logging

Corporation. From January 2002 to September 2002 he served as Vice Chief Engineer of the Technology

Development Center of COSL Logging Division. From September 2002 to December 2004 he served as the

Vice Chief Engineer of the Electromechanical Equipment Institute of COSL R&D Center. From December

2004 to April 2006 he served as the Director of the Electromechanical Equipment Institute of the COSL

Technical Center. From April 2006 to January 2010 he served as the Chief Engineer of the COSL Technical

Center. From January 2010 to May 2010 he served as Deputy Director of COSL Technical Center. From

June 2010 to June 2016 he served as Vice General Manager of COSL Well Tech Division. From June 2016

to November 2017 he served as General Manager of COSL Well Tech Division. From November 2017 to

August 2019 he served as General Manager and Deputy Party Secretary of COSL Well Tech Division. From

August 2019 to November 2019 he served as General Manager and Deputy Party Secretary (responsible for

the work of the Party Committee) of COSL Well Tech Division. From November 2019 to August 2020 he

served as General Manager and Party Secretary of COSL Well Tech Division. He concurrently served as

General Legal Counsel of COSL from July 2020 to July 2021. From July 2020 to May 2023 he served as

Vice President of COSL. From May 2023 to November 2024 he has served as President of COSL. Since

August 2023 he has served as Executive Director of COSL. He has served as the General Manager of the

Technology and Digital Intelligence Department of China National Offshore Oil Corporation since

November 2024.Employee Representative Director

Mr. Xiao Jia Chinese born in 1982 Employee Representative Director Deputy Party Secretary and

Chairman of Labour Union of COSL is a senior political engineer. He graduated from the history

department of Renmin University of China in 2004 and obtained a bachelor’s degree in history; graduated

from the School of History of Renmin University of China in 2007 majoring in modern and contemporary

history of the world and obtained a master’s degree in history. From 2004 to 2005 Mr. Xiao Jia was a

youth volunteer teacher of Yunshishan Junior Middle School in Ruijin City Jiangxi Province. From 2007 to

2010 he worked in the Culture and Education Division of the Research Office of Beijing Municipal

Committee of the Communist Party of China. From 2010 and prior to joining the Company he successively

served as a theoretical senior supervisor of ideological and political work department and the deputy head

and head of ideological building division of China National Offshore Oil Corporation the head of party

building research division of the party and mass work department and the deputy director of the party and

mass work department of China National Offshore Oil Corporation and the secretary of Youth League

Committee of China National Offshore Oil Corporation. Mr. Xiao has been the Deputy Party Secretary of

COSL since October 2024 and served as the Executive Director of COSL from December 2024 to December

2025. He has served as the Chairman of Labour Union of COSL since February 2025 and served as

Employee Representative Director of COSL since December 2025.Non-Executive Directors

Mr. Fan Baitao Chinese born in 1975 a Non-executive Director of COSL is a professor-level senior

engineer and an expert of China National Offshore Oil Corporation who is entitled to a special allowance

provided by the State Council. He graduated from Daqing Petroleum Institute with a major in petroleum

engineering in July 1998 and obtained a doctorate degree in oil and gas well engineering from China

University of Petroleum (Beijing) in December 2018. From July 1998 to July 1999 Mr. Fan had an intern at

well completion of Production Department of CNOOC Bohai Company. From July 1999 to July 2003 he

served as a well completion supervisor of CNOOC Bohai Industrial Company. From July 2003 to April

2019 he successively served as the oilfield development and management supervisor of Drilling Division

drilling & completion representative and drilling & completion deputy manager of Kerr-Mcgee Joint

Administrative Committee design manager of drilling division chief engineer of drilling & completion

–– 80 ––division and manager of engineering and technology department of Tianjin Branch of CNOOC (China) Limited.From April 2019 to October 2022 he successively served as the dean of Drilling and Production Institute vice

chief engineer (drilling & completion) and the dean of Drilling and Production Institute of CNOOC Research

Institute Co. Ltd. From November 2022 to May 2024 he served as the chief engineer (drilling & completion) of

engineering technology department of CNOOC Limited. Since May 2024 he has served as the deputy general

manager of engineering technology department of CNOOC Limited. Since August 2023 he has served as

a Non-executive Director of the Company.Mr. Liu Qiudong Chinese born in 1972 a Non-executive Director of COSL. He has been awarded the title

of Professorate Senior Accountant. He also is a Fellow of the Association of Chartered Certified

Accountants (ACCA) a Fellow of Certified Public Accountant Australia (FCPA Australia) a member of the

Association of International Accountants (AIA). He obtains a certificate of leading accounting talent issued

by the National Government Offices Administration and had been appointed as a member of the Accounting

Standards Advisory Committee of the Ministry of Finance. Mr. Liu graduated from Financial Institute of

Shandong Yantai with a major in Foreign-related Accounting in July 1994 a dual master’s degree in

Commerce and MBA from Deakin University in Australia in December 2005. From August 1995 to May

1997 he served as an accountant of the Planning and Financial Department of Shandong Fisheries

Enterprise Group; from June 1997 to April 2000 he served as a financial manager of SHANSHUI Enterprise

Pty Ltd; from May 2000 to December 2003 he served as a financial manager of Aqua Star Pty Ltd. Mr. Liu

previously served as an overseas business senior supervisor of the International Business and Marketing

Department of COSL from June 2006 to July 2007 a manager of information disclosure of the Office of the

Secretary to the Board of COSL from August 2007 to October 2013 and an accounting manager of the

Finance Department of COSL from November 2013 to April 2017. He served as a chief of the report

analysis division of the Financial and Assets Department of CNOOC from May 2017 to October 2021 and

the deputy general manager of the Financial and Assets Department of CNOOC from November 2021 to

October 2022. He has served as the deputy general manager of the Financial and Treasury Department of

CNOOC since November 2022. He has served as the deputy general manager of the Treasury Department of

CNOOC Limited since December 2022. He has served as the Chairman of the Supervisory Committee of

CNOOC Energy Technology & Services Limited since October 2023. He has served as a Non-executive

Director of the Company since August 2023.Independent Non-Executive Directors

Ms. Chiu Lai Kuen Susanna China (Hong Kong) by nationality born in 1960 an Independent Non-

executive Director of COSL MH JP. graduated from the University of Sheffield (United Kingdom) with

First-Class Honours in Economics and obtained an EMBA degree in business administration from the

Chinese University of Hong Kong. Ms. Chiu is a Hong Kong certified public accountant a Chinese certified

public accountant a qualified Chartered Accountant from England and a Certified Information System

Auditor. She is a current member of the Chinese People’s Political Consultative Conference (CPPCC) of

Shanghai an expert on government accounting standards at the Ministry of Finance and an executive

member of the Guangdong Women’s Federation. In respect of her professional career Ms. Chiu was the

former president of the Hong Kong Institute of Certified Public Accountant and the former president of the

Information Systems Audit and Control Association (China Hong Kong Chapter). Ms. Chiu is devoted to

social affairs and held a number of public service positions including the council treasurer of the Education

University of Hong Kong and a member of the Women’s Commission and the Equal OpportunitiesCommission and the Energy Advisory Committee. Ms. Chiu was awarded the Medal of Honor the “Justiceof Peace” and the “Justice of Peace NT” by the Hong Kong Government. She also obtained various awards

including the Greater Bay Area Outstanding Women Entrepreneur Award for 2021 the Outstanding Women

Professionals Award by the Hong Kong Women Professionals & Entrepreneurs Association the

“Distinguished Alumni” Award from the University of Sheffield (United Kingdom) and the “OutstandingBusiness Woman” by Hong Kong Commercial Daily etc. Ms. Chiu currently serves as an executive director

and the chief financial officer of Bonjour Holdings Limited (stock code: 653). From 2019 to 2023 she

–– 81 ––served as an independent non-executive director of Huijing Holdings Company Limited (stock code: 9968).From 2006 to 2019 Ms. Chiu successively served as Senior Vice President Eastern China Chief

Representative and Consultant under the Fung Group. From 2000 to 2005 she served as the Chief Operating

Officer of DVN (Holdings) Limited (currently known as Frontier Services Group Limited stock code:

00500). Ms. Chiu also served as an independent non-executive director of Huali University Group Limited

(currently known as China Vocational Education Holdings Limited stock code: 1756) which is listed on the

Hong Kong Stock Exchange and Nanyang Commercial Bank Limited. She has been an Independent Non-

executive Director of COSL since June 2021.Mr. Kwok Lam Kwong Larry China (Hong Kong) by nationality born in 1955 an Independent Non-

executive Director of COSL SBS BBS JP graduated from the University of Sydney Australia with double

bachelor’s degrees in economics and laws respectively as well as a master’s degree in laws. He also obtained

the Advanced Management Program diploma from the Harvard Business School. Mr. Kwok is currently

qualified to practise as a solicitor in Hong Kong and a partner of Kwok Yih & Chan. He is also admitted as

a solicitor in Australia the United Kingdom and Singapore. In addition he is qualified as a Chartered

Accountant in the United Kingdom and an Accredited Accountant in Australia and Hong Kong. Mr. Kwok

has worked in international law firms in the United States the United Kingdom and Australia and served as

the managing partner of Greater China for a total of 15 years. Mr. Kwok served as the managing partner of

King & Wood Mallesons (Asia Strategy & Markets) from 2012 to 2014. Since 2014 Mr. Kwok has served

as a partner of Kwok Yih & Chan. Since December 1994 Mr. Kwok has been an independent non-executive

director (re-designated as a non-executive director in 2005) of First Shanghai Investments Limited and has

served as an independent non-executive director of Shenwan Hongyuan (H.K.) Limited since March 1995.Mr. Kwok has been an independent non-executive director of Starlite Holdings Limited and Café de Coral

Holdings Limited since July 2004. Since February 2018 he has served as an independent non-executive

director of AAC Technologies Holdings Inc. Mr. Kwok is also an independent non-executive director of

CMB Wing Lung Bank Limited a private company in Hong Kong. Since October 2023 he has served as a

director of Association of Hong Kong Capital Market Practitioners. Mr. Kwok has served regularly on

Government boards and committees and is currently the honorary treasurer of Heep Hong Society a non-

profit organization in Hong Kong. He is also the chairman of the Appeal Tribunal Panel Buildings

Ordinance (Chapter 123) and an arbitrator of the Shenzhen Court of International Arbitration. He has been

an Independent Non-executive Director of the Company since June 2022.Mr. Yao Xin Chinese born in 1979 an Independent Non-executive Director of COSL. Mr. Yao

successively obtained a bachelor’s degree in engineering from Tsinghua University and a doctorate degree in

economics from Xiamen University. He joined the School of Economics of Xiamen University as an

assistant professor after obtaining his PhD in 2010 and was promoted to associate professor in 2012. He was

selected into Outstanding Young Scientific Research Talent Cultivation Program in Fujian Colleges and

Universities in 2013 awarded as Fujian Province Youth Top-Notch Talent in 2014 became a doctoral tutor

in 2015 and promoted to professor in 2017. He was a visiting scholar at Industrial Engineering and

Logistics Management Department of the Hong Kong University of Science and Technology during the

period from 2014 to 2016. He has served as the director of China Centre for Energy Economics Research at

Xiamen University since 2022. Mr. Yao has been devoted to the research in fields such as energy and

environmental economy green finance and sustainable supply chain for many years and has undertaken a

number of relevant national important research projects. The research results are influential and have won

multiple awards above provincial and ministerial level. He is awarded the Most Cited Chinese Researchers

in applied economics by Elsevier in 2021. He has been an Independent Non-executive Director of the

Company since August 2022.–– 82 ––Senior Management

The Company’s senior management team includes Mr. Zhao Shunqiang see “– Executive Directors” for a

description of his background. In addition the Company’s senior management team also includes Mr. Xu

Yingbo Mr. Xiao Jia Mr. Zhou Jiaxiong Mr. Wu Zixian Mr. Yang Dexing Mr. Shang Jie Mr. Sun

Weizhou and Mr. Qie Ji.The following table sets forth certain information regarding the Company’s senior management:

Name Age Position

Zhao Shunqiang . . . . . . . . . . . . . . . 57 Chairman Executive Director and CEO

Xu Yingbo . . . . . . . . . . . . . . . . . . 52 Secretary to the Disciplinary Committee

Xiao Jia . . . . . . . . . . . . . . . . . . . . 43 Employee Representative Director Deputy Party

Secretary and Chairman of Labour Union

Zhou Jiaxiong . . . . . . . . . . . . . . . . 54 Vice President

Wu Zixian . . . . . . . . . . . . . . . . . . . 45 Vice President General Legal Counsel and

Chief Compliance Officer

Yang Dexing . . . . . . . . . . . . . . . . . 45 Vice President and Safety Director

Shang Jie . . . . . . . . . . . . . . . . . . . 48 Chief Engineer

Sun Weizhou . . . . . . . . . . . . . . . . . 54 Vice President and Secretary to the Board

(Company Secretary)

Qie Ji . . . . . . . . . . . . . . . . . . . . . . 48 Chief Financial Officer

Mr. Xu Yingbo Chinese born in 1973 is the Secretary to the Disciplinary Committee of COSL senior

engineer. He graduated from the University of Petroleum (East China) with major in production process

automation and obtained a bachelor’s degree in engineering and later was granted a master’s degree in

project management from the China University of Petroleum (Beijing). From July 1997 to November 2002

Mr. Xu served as instrument engineer instrument chief operator and equipment supervisor at the Western

South China Sea Petroleum Production Company. From November 2002 to January 2007 he served as

equipment supervisor and FPSO director assistant of CNOOC Energy Development Oil Production Service

Company. From January 2007 to July 2007 he served as FPSO Director of CNOOC Shenzhen Branch

Xijiang 23-1 Oilfield. From July 2007 to April 2009 he served as Director of CNOOC Shenzhen Branch

Xijiang 23-1 Oilfield. From April 2009 to December 2010 he served as Production Director of CNOOC

Shenzhen Branch Self-operated Oilfield. From December 2010 to January 2013 he served as Production

Manager of CNOOC Shenzhen Branch Xijiang Oilfield Operation Area. From January 2013 to December

2014 he served as the Vice Manager of CNOOC Shenzhen Branch Xijiang Oilfield Operation Area. From

December 2014 to October 2016 he served as Vice General Manager Deputy Party Secretary and Secretary

to the Disciplinary Committee of CNOOC Shenzhen Branch Xijiang Oilfield Operation Area. From October

2016 to September 2017 he served as Manager of the Supervision Department of the Eastern South China

Sea Petroleum Administration. From September 2017 to December 2018 he served as Deputy Team Leader

of the Discipline Inspection Commission in CNOOC Limited Shenzhen Branch. From December 2018 to

February 2020 he served as Deputy Team Leader of the Party Inspection Team of CNOOC. From February

2020 to April 2023 Mr. Xu served as Team Leader of the Discipline Inspection Commission of the Party

Committee of CNOOC in COSL. Since April 2023 Mr. Xu has served as the Secretary to the Disciplinary

Committee of COSL.Please refer to the section “Directors” in this Offering Circular for the biography of Mr. Xiao Jia.–– 83 ––Mr. Zhou Jiaxiong Chinese born in 1971 Vice President of COSL is a professor-level senior engineer.He graduated from Jianghan Petroleum Institute with a major in exploration geophysics in 1994 and

obtained a master’s degree in geological engineering from China University of Geosciences (Wuhan) and a

doctorate degree in oil and gas field development engineering from China University of Geosciences

(Wuhan). Mr. Zhou started working in 1994 and from starting working and prior to joining the Company

he successively served as the chief engineer of development seismic chief geophysical engineer vice dean

and dean of the Research Institute of Zhanjiang Branch of CNOOC (China) Limited the deputy general

manager of the Exploration Department of CNOOC (China) Limited and the deputy general manager and

chief geologist of Tianjin Branch of CNOOC (China) Limited. He has served as Vice President of COSL

since September 2024.Mr. Wu Zixian Chinese born in 1980 Vice President General Legal Counsel and Chief Compliance

Officer of COSL is a senior engineer. He graduated from University of Petroleum (East China) with a major

in oil engineering and obtained a bachelor’s degree in engineering in 2003 and then obtained a master’s

degree in marine science and technology from University of Stavanger in Norway. From July 2003 to

January 2015 he successively served as the intern learning foreman foreman drilling team leader senior

team leader and drilling rig manager of COSL Drilling Division. From January 2015 to January 2016 he

served as the president of PT.COSL Wellservices of COSL Drilling Division. From January 2016 to June

2016 he served as the deputy general manager (temporary acting) of COSL Drilling Division. From June

2016 to September 2017 he served as the deputy general manager of COSL Drilling Division. From

September 2017 to October 2020 he served as the general manager of PT. COSL INDO. From October

2020 to November 2024 he served as the vice president of British Company of CNOOC International

Limited. Since December 2024 he has served as Vice President of COSL. Since January 2025 he has

concurrently served as the General Legal Counsel and Chief Compliance Officer of COSL.Mr. Yang Dexing Chinese born in 1980 Vice President and Safety Director of COSL is a senior engineer.Mr. Yang graduated from University of Petroleum (East China) with a major in oil engineering and obtained

a bachelor’s degree in engineering in 2003 and then obtained a master’s degree from China University of

Petroleum (East China) with major in oil and gas field development and a master’s degree from University

of Stavanger in Norway with major in industrial economics. From July 2003 to November 2007 he served

as learning foreman and drilling team leader of BH10 in Tanggu Base of COSL Drilling Division. From

November 2007 to September 2008 he served as Senior Team Leader of HYSY931 at Tanggu Operation

Company of COSL Drilling Division. From September 2008 to July 2012 he served as the Senior Team

Leader and Drilling Rig Manager of BH4 at Tanggu Operation Company of COSL Drilling Division. From

July 2012 to August 2013 he was an off-production training student for the Master of industrial economics

at University of Stavanger in Norway. From August 2013 to May 2014 he served as COSLGIFT Drilling

Rig Manager at Tanggu Operation Company of COSL Drilling Division. From May 2014 to October 2014

he was Manager of Human Resources Department of COSL Drilling Division. From October 2014 to

February 2016 he was Manager of Operational Safety and Environmental Protection Department of COSL

Drilling Division. From February 2016 to April 2017 he served as President of PT. COSL DRILLING

INDO of COSL Drilling Division. From April 2017 to June 2018 he served as Vice Manager of the Quality

and Safety Department of COSL. From June 2018 to August 2021 he was Manager of the Quality and

Safety Department of COSL. Since December 2020 he has served as Vice President of COSL. Since

February 2021 he has concurrently served as Safety Director of COSL.Mr. Shang Jie Chinese born in 1977 Chief Engineer of COSL is a professor-level senior engineer. He

graduated from Harbin Institute of Technology with major in Automobile Design and Manufacturing and

obtained a bachelor’s degree in July 1999. He graduated from Tsinghua University with major in Instrument

Science and Technology and obtained a master’s degree in July 2002 and graduated from Tsinghua

University with major in Instrument Science and Technology and obtained a doctorate degree in July 2005

respectively. From July 2005 to August 2006 he worked as an editor of the Chinese government’s official

website in Xinhuanet Co. Ltd. From January 2007 to November 2007 he worked as an intern in the

–– 84 ––Electromechanical Equipment Research Institute of the COSL Technical Center. From November 2007 to

December 2009 he served as an electronic engineer in the Electromechanical Equipment Research Institute

of COSL Technical Center. From December 2009 to December 2012 he served as a senior electronic

engineer of Electromechanical Equipment Research Institute of COSL Technical Center. From December

2012 to June 2014 he served as a senior electronic engineer and director of the Oriented Engineering

Research Institute of Oilfield Technology Institute of COSL Well Tech Division. From June 2014 to

November 2014 he served as a superior electronic engineer and director of the Oriented Engineering

Research Institute of Oilfield Technology Institute of COSL Well Tech Division. From November 2014 to

July 2016 he served as the vice dean of Oilfield Technology Institute of COSL Well Tech Division. From

July 2016 to August 2020 he served as the dean of Oilfield Technology Institute of COSL Well Tech

Division. From August 2020 to January 2021 he served as the dean of Oilfield Technology Institute of

COSL Well Tech Division (presided over the daily management of COSL Well Tech Division). He served

as Party Secretary and General Manager of COSL Well Tech Division from January 2021 to March 2023.He has been the Chief Engineer of COSL since December 2022.Mr. Sun Weizhou Chinese born in 1971 Vice President Secretary to the Board (Company Secretary) of

COSL is a senior engineer. From 1988 to 2014 he successively studied in petroleum geology at North

China Petroleum Technical School English at Tianjin Foreign Studies University business administration in

the School of Continuing Education at Yangtze University and business administration at China Europe

International Business School. He obtained a bachelor’s degree and a master’s degree in business

administration in 2008 and 2014 respectively. Mr. Sun obtained a registered qualification certificate of PRC

enterprise legal adviser in October 2008. Mr. Sun joined Bohai Petroleum Geological Services Company in

July 1992 responsible for geological logging. From June 1995 to December 2001 he successively served as

a mud logger data engineer and unit manager of China France Bohai Geoservices. From December 2001 to

December 2002 he served as a foreign affairs officer of China Oilfield Services Limited (中海油田服務股

份有限公司 ). From December 2002 to April 2006 he successively served as the secretary of the

Administration Department the person in charge of the business unit of Kazakhstan Office the supervisor of

the business unit of Malaysia Office of COSL. From April 2006 to December 2007 he served as the

contract and risk control manager of the Legal Affairs Department of COSL. From December 2007 to

November 2009 he served as the manager of contract review/legal affairs of joint venture of the Legal

Affairs Department of COSL. From November 2009 to November 2011 he served as the general manager of

the Legal Affairs Department of COSL. From November 2011 to January 2015 he served as the general

manager of the Strategic Studies and Development Department of COSL. From January 2015 to December

2021 he served as the deputy general manager of COSLExpro Testing Services (Tianjin) Company Ltd.

From December 2021 to January 2023 he served as the Party Secretary and the general manager of the

Production Optimization Division of COSL. He has been the Secretary of the Board of COSL since January

2022. From January 2022 to January 2025 he served as the Joint Company Secretary of COSL. From

November 2022 to December 2024 he served as the General Legal Counsel and Chief Compliance Officer

of COSL. He has been the Vice President of COSL since December 2022 and has been the Company

Secretary of COSL since January 2025.Mr. Qie Ji Chinese born in 1977 Chief Financial Officer of COSL is a senior accountant. He graduated

from Xi’an Jiaotong University in 2000 majoring in accounting (special orientation of CPA) and obtained a

bachelor’s degree in economics. From July 2000 to 2007 he served as the audit manager of Reanda

Certified Public Accountants. Upon leaving from Reanda Certified Public Accountants in 2007 and prior to

joining the Company Mr. Qie successively served as the accounting supervisor senior supervisor of

performance appraisal the deputy director of budget management office and director of budget management

office of the financial capital department of China National Offshore Oil Corporation. Mr. Qie has served as

the CFO of COSL since June 2024.–– 85 ––Director’s remuneration

The remuneration of directors are proposed by the Board of the Company with reference to the duties and

responsibilities of the directors and are subject to shareholders’ approval at general meetings after

consideration of the Remuneration and Assessment Committee’s recommendation and the performance and

results of the Group.For the year ended 31 December 2024 the aggregate amount of remuneration paid to the Company’s

directors chief executives and supervisors was approximately RMB5.4 million of which fees paid and

payable to independent non-executive directors and independent supervisors were approximately RMB1.3

million and fees paid and payable to executive directors non-executive directors supervisors and the chief

executives were approximately RMB4.2 million for the same period. Each Director’s annual compensation

including fees salaries allowances benefits in kind pension benefits and share option benefits is disclosed

to Note 11 to the Group’s consolidated financial statements for the year ended 31 December 2024 included

elsewhere in this Offering Circular.Committees

Audit Committee

The Audit Committee of the Company consists of three members namely Chiu Lai Kuen Susanna Kwok

Lam Kwong Larry and Yao Xin. All of them are independent non-executive directors and Chiu Lai Kuen

Susanna acts as Chairman. The functions of the Audit Committee are to supervise and evaluate the work of

external auditors; to review and express opinion on the Company’s financial information; to review relevant

matters of connected transactions; to supervise the Company’s financial reporting system and internal

control system; to supervise and evaluate the internal control of the Company; to supervise and evaluate the

internal audit work; to coordinate the communication between the management internal audit department

relevant departments and external auditor; to check the Company’s compliance with legal and other statutory

obligations; to take charge of the engagement or dismissal of external auditors and submit to the Board for

consideration; to take charge of the appointment or dismissal of the financial officer and submit to the Board

for consideration; and other functions and duties stipulated by laws regulations and the stock exchange and

granted by the Board.Nomination Committee

The Nomination Committee of the Company consists of three members namely Yao Xin Zhao Shunqiang

and Kwok Lam Kwong Larry. Two of them are independent non-executive directors and Yao Xin acts as

Chairman.Major functions of this committee are to select and recommend candidates for directors and senior

management of the Company and the standards and procedures for selecting such candidates.Remuneration and Assessment Committee

The Remuneration and Assessment Committee of the Company consists of four members all of them are

non-executive directors namely Kwok Lam Kwong Larry Chiu Lai Kuen Susanna Yao Xin and Liu

Qiudong. Three of them are independent non-executive directors. Kwok Lam Kwong Larry acts as

Chairman.–– 86 ––The functions of this committee are to formulate the standard for assessing the performance of directors and

senior management and to conduct such assessment formulate and review the remuneration policy and

scheme for directors and senior management. The committee studies and discusses the above matters and

makes recommendations to the Board and the Board reserves the final decision in respect of the above

matters.Directors’ Service Contracts

The newly appointed directors are required to enter into a service contract with the Company for a term of

three years renewable upon re-election. The Company has not entered into service contract which the

Company cannot terminate within one year or is required to pay compensation for termination (other than

statutory compensation) with directors who were re-elected at the annual general meeting.–– 87 ––TERMS AND CONDITIONS OF THE NOTES

The following other than the words in italics is the text of the terms and conditions of the Notes which will

appear on the reverse of each of the definitive certificates evidencing the Notes.The issue of the CNY5000000000 1.95 per cent. guaranteed notes due 2029 (the “Notes”) was authorised

by a resolution of the Board of Directors of COSL Singapore Capital Ltd. (the “Issuer”) passed on 18

August 2025. The Notes are guaranteed by China Oilfield Services Limited (the “Guarantor”). The giving

of the Guarantee (as defined in Condition 3(b)) was authorised by the resolutions of the Board of Directors

of the Guarantor dated 25 March 2025 and the meeting of the Guarantor’s shareholders on 22 May 2025.The Notes are constituted by a Trust Deed (as amended or supplemented from time to time the “TrustDeed”) dated on or about 16 March 2026 (the “Issue Date”) among the Issuer the Guarantor and Citicorp

International Limited (the “Trustee” which expression shall include all persons for the time being a trustee

or trustees appointed under the Trust Deed) as trustee for itself and the holders of the Notes. These terms

and conditions are summaries of and are subject to the detailed provisions of the Trust Deed which

includes the form of the Notes. The Notes have the benefit of a deed of guarantee (as amended or

supplemented from time to time the “Deed of Guarantee”) dated 16 March 2026 executed by the Guarantor

relating to the Notes. The Notes are the subject of an Agency Agreement (as amended or supplemented from

time to time the “Agency Agreement”) dated on or about 16 March 2026 relating to the Notes among the

Issuer the Guarantor Citicorp International Limited as registrar (the “Registrar” which expression includes

any successor registrar appointed from time to time in connection with the Notes) as CMU lodging and

paying agent (the “CMU Lodging and Paying Agent” which expression includes any successor CMU

lodging and paying agent appointed from time to time in connection with the Notes) and as transfer agent

(the “Transfer Agent” which expression includes any successor or additional transfer agent appointed from

time to time in connection with the Notes) the other agents named therein and the Trustee.Copies of the Trust Deed the Agency Agreement and the Deed of Guarantee are available for inspection at

all reasonable times during normal business hours (being 9:00 a.m. to 3:00 p.m. Hong Kong time Monday

to Friday except for public holidays) at the principal place of business of the Trustee (being at the Issue Date

at 40/F Champion Tower 3 Garden Road Central Hong Kong) following prior written request and proof of

holding and identity satisfactory to the Trustee. Copies of the Trust Deed the Agency Agreement and the

Deed of Guarantee will also be mailed to any Noteholder at such Noteholders’ cost following the receipt by

the Trustee of request therefor from such Noteholder and proof of holding and identity satisfactory to the Trustee.“Paying Agents” means the CMU Lodging and Paying Agent and any successor or additional paying agents

appointed from time to time in connection with the Notes.“Agents” means the CMU Lodging and Paying Agent the Paying Agents the Registrar the Transfer Agent

and any other agent or agents appointed from time to time with respect to the Notes. All capitalised terms

that are not defined in these terms and conditions (these “Conditions”) will have the meanings given to

them in the Trust Deed. Certain provisions of these Conditions are summaries of the Trust Deed and the

Agency Agreement and are subject to their detailed provisions. The Noteholders are entitled to the benefit

of are bound by and are deemed to have notice of all the provisions of the Trust Deed and the Deed of

Guarantee and are deemed to have notice of those provisions of the Agency Agreement applicable to them.

1 Form Denomination and Title

(a) Form and denomination: The Notes are issued in the specified denomination of

CNY1000000 and higher integral multiples of CNY10000 in the excess thereof. A

certificate (each a “Definitive Certificate”) will be issued to each holder of the Notes in

respect of its registered holding of Notes. Each Definitive Certificate shall be numbered

–– 88 ––serially and shall have an identifying number which shall be recorded on the relevant

Definitive Certificate and in the register of holders of the Notes (the “Register”) which the

Issuer shall procure to be kept by the Registrar.Upon issue the Notes will be represented by a global certificate (the “Global Certificate”)

registered in the name of and lodged with a sub-custodian for the Hong Kong Monetary

Authority as operator (the “CMU Operator”) of the Central Moneymarkets Unit Service (the

“CMU”) and will be exchangeable for Definitive Certificate only in the circumstances set out

therein. The Conditions are modified by certain provisions contained in the Global Certificatewhile any of the Notes are represented by the Global Certificate. See “Summary of ProvisionsRelating to the Notes in Global Form”.For so long as any of the Notes are represented by the Global Certificate each person who is

for the time being shown in the records of the CMU Operator as the holder of a particular

principal amount of Notes (each such person an “account holder”) (in which regard any

certificate or other documents issued by the CMU Operator as to the principal amount of such

Notes standing to the account of any person shall be conclusive and binding for all purposes

other than with respect to the payment of principal premium (if any) or interest on the Notes

the right to which shall be vested as against the Issuer the Guarantor the Agents and the

CMU Operator solely in the registered holder of the Global Certificate in accordance with and

subject to its terms) shall be treated by the Issuer the Guarantor the Agents and the CMU

Operator as the holder of such principal amount of such Notes for all purposes except in the

case of manifest error. Notwithstanding the above if the Global Certificate is held by or on

behalf of the CMU any payments that are made in respect of the Notes evidenced by the

Global Certificate shall be made to the respective account holders. For so long as any of the

Notes are represented by the Global Certificate and the Global Certificate is held with the

CMU any transfer of principal premium and interest amounts of Notes shall be effected in

accordance with the rules and procedures for the time being of the CMU Operator.Except in the limited circumstances described in the Global Certificate owners of interests in

Notes represented by the Global Certificate will not be entitled to receive Definitive

Certificates in respect of their individual holdings of Notes. The Notes are not issuable in

bearer form.“Certificate” means any Global Certificate or Definitive Certificate and includes any

replacement certificate issued pursuant to Condition 11.(b) Title: Title to the Notes shall pass only by transfer and registration of title in the Register. The

holder of any Note shall except as ordered by a court of competent jurisdiction or as otherwise

required by law be treated as its absolute owner for all purposes (whether or not it is overdue

and regardless of any notice of ownership trust or any interest in it or any writing on (other

than the endorsed form of transfer) or the theft or loss of the Definitive Certificate issued in

respect of it) and no person shall be liable for so treating the holder and the Agents shall not

be affected by any notice to the contrary. In these Conditions “holder of the Notes” “holder”

and “Noteholder” in relation to a Note shall mean the person in whose name a Note is

registered in the Register (or in the case of a joint holding the first name thereof).–– 89 ––2 Transfers of Notes and Issue of Definitive Certificates

(a) Register: The Issuer will cause the Register to be kept at the Specified Office of the Registrar

and in accordance with the terms of the Trust Deed on which shall be entered the names and

addresses of the holders of the Notes and the particulars of the Notes held by them and of all

transfers of the Notes. Each Noteholder shall be entitled to receive only one Definitive

Certificate in respect of its entire holding of Notes.(b) Transfers: Subject to the Agency Agreement and Conditions 2(e) and 2(f) a Note may be

transferred by delivery of the Definitive Certificate issued in respect of that Note with the

form of transfer endorsed on such Definitive Certificate duly completed and signed by the

holder or his attorney duly authorised in writing together with such evidence as the Registrar

or (as the case may be) such Transfer Agent may require to prove the title of the transferor and

the authority of the individuals who have executed the form of transfer to the Specified Office

of the Registrar or the Transfer Agent. No transfer of title to a Note will be valid unless and

until entered on the Register.Transfers of interests in the Notes evidenced by the Global Certificate will be effected in

accordance with the rules and procedures of the CMU.(c) Delivery of new Definitive Certificates: Each new Definitive Certificate to be issued upon a

transfer of Notes will within seven business days (as defined below) of receipt by the

Registrar or as the case may be any Transfer Agent of the Definitive Certificate and the form

of transfer duly completed and signed be made available for collection at the Specified Office

of the Registrar or such Transfer Agent or if so requested in the form of transfer be mailed by

uninsured mail at the risk of the holder entitled to the Notes but free of charge to the holder

and at the Issuer’s expense to the address specified in the form of transfer. The form of

transfer is available at the Specified Offices of the Transfer Agent.Where only part of a principal amount of the Notes (being that of one or more Notes) in

respect of which a Definitive Certificate is issued is to be transferred or exchanged a new

Definitive Certificate in respect of the Notes not so transferred or exchanged will within seven

business days (as defined below) of delivery of the original Definitive Certificate to the

Registrar or the relevant Transfer Agent be made available for collection at the Specified

Office of the Registrar or such Transfer Agent or if so requested in the form of transfer be

mailed by uninsured mail at the risk of the holder of the Notes not so transferred or exchanged

(but free of charge to the holder and at the Issuer’s expense) to the address of such holder

appearing on the Register.In this Condition 2(c) “business day” shall mean a day (other than a Saturday Sunday or

public holiday) on which commercial banks are generally open for business in the city in

which the Specified Office of the Registrar or (as the case may be) such Transfer Agent with

whom a Definitive Certificate is deposited in connection with a transfer or exchange is

located.(d) Formalities free of charge: Registration of a transfer or redemption of Notes and issuance of

new Definitive Certificates will be effected without charge by or on behalf of the Issuer or any

of the Agents but upon (i) payment (or the giving of such indemnity or security or prefunding

as the Issuer or any of the Agents may require) in respect of any tax or other governmental

charges which may be imposed in relation to such transfer; (ii) the Registrar being satisfied in

–– 90 ––its absolute discretion with the documents of title or identity of the person making the

application; and (iii) the relevant Agent (after consultation with the Issuer if so required) being

satisfied that the regulations concerning transfer of Notes have been complied with.(e) Closed periods: No Noteholder may require the transfer of a Note to be registered (i) during

the period of seven days ending on (and including) any Interest Record Date (as defined in

Condition 7(a)); (ii) during the period of 15 days ending on (and including) the due date for

redemption of that Note; or (iii) after the exercise of the put option in Condition 6(c) or 6(d) in

respect of such Note.(f) Regulations: All transfers of Notes and entries on the Register will be made subject to the

detailed regulations concerning transfer of Notes scheduled to the Trust Deed. The regulations

may be changed by the Issuer with the prior written approval of the Registrar and the Trustee

or by the Registrar with the prior written approval of the Trustee. A copy of the current

regulations will be mailed by the Registrar to any Noteholder (at the cost and expense of such

Noteholder) who requests in writing a copy of such regulations following request in writing

and proof of holding and identity satisfactory to the Registrar.

3 Status and Guarantee

(a) Status of the Notes: The Notes constitute direct unconditional unsubordinated and (subject to

Condition 4(a)) unsecured obligations of the Issuer which will at all times rank pari passu with

all other unsecured and unsubordinated obligations of the Issuer save for such obligations as

may be preferred by provisions of law that are both mandatory and of general application and

subject to Condition 4(a).(b) Guarantee: The Guarantor has unconditionally and irrevocably guaranteed the due and

punctual payment of all sums expressed to be payable by the Issuer in respect of the Notes.The Guarantor’s guarantee of the Notes is referred to as the “Guarantee” and are contained in

the Deed of Guarantee. The Guarantee constitutes direct unconditional unsubordinated and

(subject to Condition 4(a)) unsecured obligations of the Guarantor which will at all times rank

at least pari passu with all other unsecured and unsubordinated obligations of the Guarantor

save for such obligations as may be preferred by provisions of law that are both mandatory and

of general application and subject to Condition 4(a).

4 Covenants

(a) Limitation on Liens: So long as any Note remains outstanding the Guarantor will not and

will not permit the Issuer or any Principal Subsidiary to create incur assume or permit to

exist any Lien upon any of their respective property or assets now owned or hereafter

acquired to secure any Relevant Indebtedness of the Guarantor the Issuer or such Principal

Subsidiary (or any guarantees or indemnity in respect thereof) without in any such case

making effective provision whereby the Notes and the Guarantee will be secured either at least

equally and rateably with such Relevant Indebtedness or by such other Lien as shall have been

approved by Extraordinary Resolution of the Noteholders as provided in the Trust Deed for so

long as such Relevant Indebtedness will be so secured unless after giving effect thereto the

aggregate outstanding principal amount of all such secured Relevant Indebtedness entered into

after the Issue Date does not exceed 10 per cent. of the Adjusted Consolidated Net Worth of

the Guarantor determined at the time of creation or assumption of such Lien.The foregoing restriction will not apply to:

–– 91 ––(i) any Lien which is in existence prior to the Issue Date and any replacement thereof

created in connection with the refinancing (together with interest fees and other charges

attributable thereto) of the Relevant Indebtedness originally secured (but the principal

amount secured by any such Lien may not be increased);

(ii) any Lien arising or already arisen automatically by operation of law which is promptly

discharged or disputed in good faith by appropriate proceedings; provided that any

reserve or other appropriate provision required by HKFRS shall have been made

therefor;

(iii) any Lien over goods (or any documents relating thereto) arising either in favour of a

bank issuing a form of documentary credit in connection with the purchase of such

goods or by way of retention of title by the supplier of such goods where such goods are

supplied on credit subject to such retention of title and in both cases where such goods

are acquired in the ordinary course of business;

(iv) any right of set-off or combination of accounts arising in favour of any bank or financial

institution as a result of the day-to-day operation of banking arrangements;

(v) any Lien either over any asset acquired after the Issue Date which is in existence at the

time of such acquisition or in respect of the obligations of any Person which becomes

the Guarantor’s Subsidiary or which merges with and into the Guarantor after the Issue

Date which is in existence at the date on which it becomes the Guarantor’s Subsidiary

and in both cases any replacement thereof created in connection with the refinancing

(together with interest fees and other charges attributable thereto) of the Relevant

Indebtedness originally secured (but the principal amount secured by any such Lien may

not be increased); provided that any such Lien was not incurred in anticipation of such

acquisition or of such company becoming the Guarantor’s Subsidiary;

(vi) any Lien created on any property or asset acquired leased or developed (including

improved constructed altered or repaired) after the Issue Date; provided however that

(A) any such Lien shall be confined to the property or asset acquired leased or

developed (including improved constructed altered or repaired); (B) the principal

amount of the debt encumbered by such Lien shall not exceed the cost of the acquisition

or development of such property or asset or any improvement thereto (including any

construction repair or alteration) or thereon and (C) any such Lien shall be created

concurrently with or within one year following the acquisition lease or development

(including construction improvement repair or alteration) of such property or asset;

(vii) any Lien pursuant to any order of attachment execution enforcement distraint or

similar legal process arising in connection with court proceedings; provided that such

process is effectively stayed discharged or otherwise set aside within 30 days;

(viii) any Lien created or outstanding in favour of the Guarantor or any of the Guarantor’s

Subsidiaries;

(ix) any easement right-of-way zoning and similar restriction and other similar charge or

encumbrance not interfering with the ordinary course of business of the Guarantor and

the Principal Subsidiaries;

–– 92 ––(x) any lease sublease licence and sublicence granted to any third party and any Lien

pursuant to operating agreements development agreements and any other agreements

which are customary in the oilfield services industry and in the ordinary course of the

Guarantor’s business and any Principal Subsidiary;

(xi) any Lien arising in connection with industrial revenue development or similar bonds or

other indebtedness or means of project financing (not to exceed the value of the project

financed and limited to the project financed);

(xii) any Lien in favour of any government or any subdivision thereof securing the

obligations of the Guarantor or any of the Principal Subsidiaries under any contract or

payment owed to such governmental entity pursuant to applicable laws rules

regulations or statutes;

(xiii) any renewal or extension of any of the Liens described in the foregoing clauses which is

limited to the original property or asset covered thereby; or

(xiv) any Lien in respect of Relevant Indebtedness of the Guarantor or any of the Guarantor’s

Subsidiaries with respect to which the Guarantor or such Subsidiary has paid money or

deposited money or securities with a fiscal agent trustee or depository to pay or

discharge in full the obligations of the Guarantor and the Guarantor’s Subsidiary in

respect thereof (provided that such money or securities so paid or deposited and the

proceeds therefrom be sufficient to pay or discharge such obligations in full).(b) Consolidation Merger and Sale of Assets: Neither the Guarantor nor the Issuer will

consolidate with or merge into any other Person in a transaction in which the Guarantor or the

Issuer as the case may be is not the surviving entity or convey transfer or lease its properties

and assets (computed on a consolidated basis) substantially as an entirety to any Person unless:

(i) any Person formed by such consolidation or into which the Guarantor or the Issuer as

the case may be is merged or to whom the Guarantor or the Issuer as the case may be

has conveyed transferred or leased its properties and assets substantially as an entirety

is a corporation partnership trust or other entity validly existing under the laws of the

PRC the Cayman Islands the British Virgin Islands Hong Kong or Singapore and such

Person expressly assumes by a trust deed supplemental to the Trust Deed and a deed

supplemental to the Deed of Guarantee all the obligations of the Guarantor or the Issuer

under the Deed of Guarantee the Trust Deed the Notes or the Guarantee as the case

may be;

(ii) immediately after giving effect to the transaction no Event of Default and no event

which after notice or lapse of time or both would become an Event of Default shall

have occurred and be continuing;

(iii) any such Person not organised and validly existing under the laws of the PRC (in the

case of the Guarantor) or Singapore (in the case of the Issuer) shall expressly agree in a

supplemental trust deed that its jurisdiction of organisation or tax residence (or any

political subdivision territory or possession thereof any taxing authority therein or any

area subject to its jurisdiction) will be added to the list of Relevant Jurisdictions (as

defined in Condition 8(a)); and

–– 93 ––(iv) if as a result of the transaction any property or asset of the Guarantor or any of the

Guarantor’s Principal Subsidiaries would become subject to a Lien that would not be

permitted under Condition 4(a) above the Guarantor the Issuer or such successor

Person takes such steps as shall be necessary to secure the Notes and the Guarantee at

least equally and rateably with the Relevant Indebtedness secured by such Lien or by

such other Lien as shall have been approved by the Noteholders pursuant to the Trust

Deed.(c) Limitation on the Issuer’s Activities: So long as any Note remains outstanding:

(i) the Issuer will conduct no business or any other activities other than to finance the

business operations of the Guarantor or one or more companies controlled by the

Guarantor through the offering sale or issuance of securities and borrowings of

indebtedness and holding of the proceeds thereof or investing in or lending of the

proceeds thereof to the Guarantor or a company controlled by the Guarantor and any

other activities in connection therewith;

(ii) the Guarantor will cause each of COSL Hong Kong International Limited and COSL

Singapore Limited (together with COSL Hong Kong International Limited the

“Intermediate Companies” and each an “Intermediate Company”) to remain 100

per cent. owned directly or indirectly by the Guarantor; and

(iii) the Guarantor will cause COSL Singapore Limited to maintain 100 per cent. equity

ownership of the Issuer.(d) Financial Information: For so long as any Note remains outstanding and the common stock

of the Guarantor is not or ceases to be listed for trading on a stock exchange:

(i) the Guarantor will upload on its website and as soon as they are available and in any

event: (A) within 180 calendar days of the end of each fiscal year of the Guarantor

(which ends on 31 December) ending after the date hereof copies of its latest annual

report and audited consolidated financial statements in English; (B) within 135 calendar

days of the end of the first semi-annual fiscal period of the Guarantor copies of its

latest unaudited interim consolidated financial statements; and (C) within 10 calendar

days after any financial statements in (A) and (B) are filed with The Stock Exchange of

Hong Kong Limited or any other securities exchange on which its ordinary shares are at

any time listed for trading true and correct copies of any financial or other report in the

English language filed with such exchange.(ii) The Issuer and the Guarantor will deliver to the Trustee within 14 days of a written

request and within 180 days after the end of each fiscal year (which ends on 31

December) ending after the date hereof an Officer’s Certificate (as defined in the Trust

Deed) of the Issuer and the Guarantor certifying that to the best of the knowledge

information and belief of the Issuer and the Guarantor no Event of Default (as defined

in Condition 9) or Potential Event of Default (as defined in the Trust Deed) had

occurred since the certification date of the last such certificate or (if none) the date of

the Trust Deed (or if such an event has occurred giving details of it) and the Issuer and

the Guarantor are in compliance with all covenants and conditions to be complied with

by them under the Trust Deed and the Deed of Guarantee (or if non-compliance has

occurred giving details of it). The Trustee may rely on the contents of such certificate

–– 94 ––with respect to the matters stated therein. For purposes of this Condition 4(d)(ii) such

compliance shall be determined without regard to any period of grace or requirement of

notice under these Conditions the Trust Deed or the Deed of Guarantee.(e) Undertakings relating to the Guarantee: The Guarantor undertakes that it will:

(i) file or cause to be filed with the State Administration of Foreign Exchange or its local

branch (“SAFE”) the Deed of Guarantee and other related documents in accordance

with the Foreign Exchange Administration Rules on Cross-Border Security (跨境擔保外

匯管理規定 ) within the prescribed timeframe after the execution of the Deed of

Guarantee (the “Cross-Border Security Registration”) and use its best endeavours to

complete the Cross-Border Security Registration on or before the Registration Deadline

and obtain a registration evidence (業務登記憑證) from SAFE; and

(ii) deliver to the Trustee on or before the relevant Registration Deadline a certificate in

substantially the form set out in the Trust Deed of a director or duly authorised officer

of the Guarantor (who is also an Authorised Signatory of the Guarantor) confirming the

completion of the registration with SAFE of the Guarantee and the Deed of Guarantee

together with a copy of the relevant SAFE registration evidence (業務登記憑證) and

any other document (if applicable) issued by SAFE evidencing the completion of the

SAFE registration each certified in English by such Authorised Signatory of the

Guarantor to be a true and correct copy of the original.(f) Undertaking relating to the NDRC: The Guarantor undertakes that it will (i) within the

prescribed time period prescribed by the NDRC (as defined below) or under the relevant laws

and regulations file or cause to be filed with the National Development and Reform

Commission of the PRC or its local counterparts (the “NDRC”) the requisite information and

documents (the “NDRC Post-issuance Filing”) in accordance with the Administrative

Measures on the Approval and Registration of Medium- to Long-Term Foreign Debts of

Enterprises (企業中長期外債審核登記管理辦法) issued by the NDRC and effective as of 10

February 2023 and comply with all applicable PRC laws rules and regulations in connection

with the Notes (including but not limited to any rules and regulations issued by the NDRC

from time to time) and (ii) comply with the continuing obligations including making other

appropriate post-issuance disclosures registrations and filings in connection with the Notes as

required by applicable laws and regulations issued by the NDRC from time to time.(g) Corporate Existence: For so long as any Note remains outstanding each of the Issuer and the

Guarantor shall do or cause to be done all things necessary to preserve and keep in full force

and effect its corporate existence and that of each Principal Subsidiary and the corporate rights

(charter and statutory) corporate licences and corporate franchises of the Issuer the Guarantor

and each Principal Subsidiary except where a failure to do so singly or in the aggregate

would not have a material adverse effect upon the business prospects assets conditions

(financial or otherwise) or results of operations of the Guarantor and the Principal Subsidiaries

taken as a whole; provided that subject to Condition 4(b) neither the Issuer nor the Guarantor

shall be required to preserve any such existence right licence or franchise if the board of

directors of the Issuer the Guarantor or of the Subsidiary concerned as the case may be shall

determine that the preservation thereof is no longer desirable in the conduct of the business of

the Issuer the Guarantor or such Principal Subsidiary and that the loss thereof would not have

a material adverse impact on the Noteholders.–– 95 ––(h) Definitions: In these Conditions:

“Adjusted Consolidated Net Worth” means the sum of the Guarantor’s (i) shareholders’

equity as determined under HKFRS and (ii) Subordinated Indebtedness;

“Authorised Signatory” has the meaning given to it in the Trust Deed;

“Capital Stock” means any and all shares interests (including joint venture interests)

participations or other equivalents (however designated) of capital stock of a corporation or

any and all equivalent ownership interests in a Person (other than a corporation);

“China Business Day” means a day (other than a Saturday Sunday or a public holiday) on

which banks in Beijing PRC are not authorised or obligated by law or executive order to be

closed;

“Hong Kong” means the Hong Kong Special Administrative Region of the People’s Republic

of China;

“HKFRS” means the Hong Kong Financial Reporting Standards;

“Indebtedness” of any Person means at any date without duplication (i) any outstanding

indebtedness for or in respect of money borrowed (including bonds debentures notes or other

similar instruments whether or not listed) that is evidenced by any agreement or instrument

excluding trade payables (ii) all non-contingent obligations of such Person to reimburse any

bank or other Person in respect of amounts paid under a letter of credit or similar instrument

and (iii) all Indebtedness of others guaranteed by such Person; provided however that for the

purpose of determining the amount of the Guarantor’s Indebtedness outstanding at any relevant

time the amount included as the Guarantor’s Indebtedness in respect of finance leases shall be

the net amount from time to time properly characterised as “obligations under finance leases”

in accordance with the HKFRS;

“Lien” means any mortgage charge pledge lien encumbrance hypothecation title retention

security interest or security arrangement of any kind;

“Officer’s Certificate” has the meaning given to it in the Trust Deed;

“Person” means any individual corporation partnership joint venture association joint stock

company trust unincorporated organisation limited liability company enterprise government

or any agency or political subdivision thereof or any other entity;

“PRC” means the People’s Republic of China excluding for the purpose of these Conditions

only Hong Kong the Macau Special Administrative Region of the People’s Republic of China

and Taiwan;

“Principal Subsidiary” at any time shall mean any one of the Guarantor’s Subsidiaries:

(a) as to which one or more of the following conditions is/are satisfied:

(i) its net profit or (in the case of one of the Guarantor’s Subsidiaries which has

Subsidiaries) consolidated net profit attributable to the Guarantor (in each case

before taxation and exceptional items) is at least 10 per cent. of the Guarantor’s

consolidated net profit (before taxation and exceptional items); or

–– 96 ––(ii) its net assets or (in the case of one of the Guarantor’s Subsidiaries which has

Subsidiaries) consolidated net assets attributable to the Guarantor (in each case

after deducting minority interests in Subsidiaries) are at least 10 per cent. of the

Guarantor’s consolidated net assets (after deducting minority interests in

Subsidiaries)

all as calculated by reference to the then latest audited financial statements

(consolidated or as the case may be unconsolidated) of the Guarantor’s Subsidiary

and the Guarantor’s then latest consolidated financial statements provided that: (1) in

the case of a Subsidiary of the Guarantor acquired after the end of the financial period

to which the then latest relevant audited financial statements relate the reference to the

then latest audited financial statements for the purposes of the calculation above shall

until audited financial statements for the financial period in which the acquisition is

made are published be deemed to be a reference to the financial statements adjusted to

consolidate the latest audited financial statements of the Subsidiary in the financial

statements; (2) if in the case of a Subsidiary of the Guarantor which itself has one or

more Subsidiaries no consolidated financial statements are prepared and audited its

consolidated net assets and consolidated net profits shall be determined on the basis of

pro forma consolidated financial statements of the relevant Subsidiary and its

Subsidiaries prepared for this purpose; or (3) if the financial statements of a

Subsidiary of the Guarantor (not being a Subsidiary referred to in proviso (1) above

of this definition) are not consolidated with those of the Guarantor then the

determination of whether or not the Subsidiary is a Principal Subsidiary shall if the

Guarantor requires be based on a pro forma consolidation of its financial statements

(consolidated if appropriate) with the consolidated financial statements of the Guarantor

and its Subsidiaries; or

(b) to which is transferred all or substantially all of the assets of the Guarantor’s Subsidiary

which immediately prior to the transfer was a Principal Subsidiary provided that with

effect from such transfer the Subsidiary which so transfers its assets and undertakings

shall cease to be a Principal Subsidiary (but without prejudice to paragraph (a) above of

this definition) and the Guarantor’s Subsidiary to which the assets are so transferred

shall become a Principal Subsidiary.An Officer’s Certificate of the Guarantor stating that in the opinion of the Guarantor a

Subsidiary is or is not or was or was not a Principal Subsidiary shall in the absence of wilful

default or manifest error be conclusive and binding on the Issuer the Guarantor the Trustee

the Agents and the Noteholders. Such Officer’s Certificate shall if there is a dispute as to

whether a Subsidiary of the Issuer is or is not a Principal Subsidiary be accompanied by a

report by an internationally recognised firm of accountants addressed to the directors of the

Guarantor as to proper extraction of the figures used by the Guarantor in determining the

Principal Subsidiaries of the Guarantor and mathematical accuracy of the calculation;

“Rating Agencies” means (i) Standard & Poor’s Ratings Services and its affiliates (“S&P”);

(ii) Moody’s Investors Service Inc. a subsidiary of Moody’s Corporation and its successors

(“Moody’s”); (iii) Fitch Ratings Ltd. a subsidiary of the Fitch Group a jointly owned

subsidiary of Fimalae S.A. and Hearst Corporation and its successors (“Fitch”); and (iv) if

one or more of S&P Moody’s or Fitch or shall not make a rating of the Notes publicly

available any internationally recognised securities rating agency or agencies as the case may

be selected by (and notified to the Trustee in writing by) the Guarantor which shall be

substituted for S&P Moody’s or Fitch or any combination thereof as the case may be;

–– 97 ––“Registration Deadline” means the day falling 120 China Business Days after the Issue Date;

“Relevant Indebtedness” of any Person means at any date Indebtedness (i) that has a final

maturity of one year or more from the date of incurrence or issuance of such Indebtedness and

(ii) is in the form of is represented or embodied by bonds notes debentures or other

securities which are or intended to be commonly quoted listed or dealt in or traded on any

stock exchange or over-the-counter securities market;

“Subordinated Indebtedness” means the Guarantor’s Indebtedness (including perpetual debt

which the Guarantor is not required to repay) which (i) has a final maturity and a weighted

average life to maturity longer than the remaining life to maturity of the Notes and (ii) is

issued or assumed pursuant to or evidenced by an indenture or other instrument containing

provisions for the subordination of such Indebtedness to the Notes including (A) a provision

that in the event of the bankruptcy insolvency or other similar proceeding in respect of the

Guarantor the holders of the Notes shall be entitled to receive payment in full in cash of all

principal Additional Amounts (as defined in Condition 8(a)) and interest on the Notes

(including all interest arising after the commencement of such proceeding whether or not an

allowed claim in such proceeding) before the holder or holders of any such Subordinated

Indebtedness shall be entitled to receive any payment of principal interest or premium thereon;

(B) a provision that if an Event of Default has occurred and is continuing under the Trust

Deed the holder or holders of any such Subordinated Indebtedness shall not be entitled to

payment of any principal interest or premium in respect thereof unless or until such Event of

Default shall have been cured or waived or shall have ceased to exist; and (C) a provision that

the holder or holders of such Subordinated Indebtedness may not accelerate the maturity

thereof as a result of any default relating thereto so long as any Note is outstanding;

“Subsidiary” means as applied to any Person any corporation or other entity of which a

majority of the outstanding Voting Shares is at the time directly or indirectly owned by such

Person; and

“Voting Shares” means with respect to any Person the Capital Stock having the general

voting power under ordinary circumstances to vote on the election of the members of the board

of directors or other governing body of such Person (irrespective of whether or not at the time

stock of any other class or classes shall have or might have voting power by reason of the

happening of any contingency).Neither the Trustee nor any Agent shall have any obligation to monitor and/or ensure and/or

assist with the Cross-border Security Registration or the NDRC Post-Issuance Filing on or

before the relevant deadlines referred above in Conditions 4(e) and 4(f) or to verify the

accuracy content completeness validity and/or genuineness of any documents in relation to or

in connection with the Cross-border Security Registration or the NDRC Post-Issuance Filing

or to procure that any document in relation to or in connection with the Cross-border Security

Registration or the NDRC Post-Issuance Filing not in English is translated into English or to

verify the accuracy of any English translation of any document in relation to or in connection

with the Cross-border Security Registration or the NDRC Post-Issuance Filing or to give

notice to the Noteholders confirming the completion of the NDRC Post-issue Filing or the

SAFE Registration and none of them shall be liable to the Noteholders or any other person for

not doing so.–– 98 ––5 Interest

(a) Interest Rate and Interest Payment Dates: The Notes bear interest on their outstanding

principal amount from and including 16 March 2026 at the rate of 1.95 per cent. per annum

payable semi-annually in arrear on 16 March and 16 September in each year (each an

“Interest Payment Date”) commencing on 16 September 2026. If any Interest Payment Date

would otherwise fall on a day which is not a business day (as defined below in this Condition

5) it shall be postponed to the next day which is a business day unless it would thereby fall

into the next calendar month in which event it shall be brought forward to the immediately

preceding business day.(b) Interest Payments: Each Note will cease to bear interest from the due date for redemption

unless upon surrender of the Definitive Certificate representing such Note payment of

principal or premium (if any) is improperly withheld or refused. In such event it shall continue

to bear interest in accordance with this Condition 5 (both before and after judgment) until

whichever is the earlier of (i) the day on which all sums due in respect of such Note up to that

day are received by or on behalf of the relevant Noteholder and (ii) the day seven days after

the Trustee or the CMU Lodging and Paying Agent has notified Noteholders of receipt of all

sums due in respect of all the Notes up to that seventh day (except to the extent that there is

failure in the subsequent payment to the relevant holders under these Conditions).(c) Calculation of Interest: Interest in respect of any Note shall be calculated on the basis of the

actual number of days in the Interest Period or such other period divided by 365 and rounding

the resulting figure to the nearest cent (half a cent being rounded upwards).In this Condition 5:

“business day” means a day (other than a Saturday Sunday or public holiday) upon which

commercial banks are generally open for business and settlement of Renminbi payments in

Hong Kong; and

“Interest Period” means each period beginning on (and including) the Issue Date or any

Interest Payment Date and ending on (and excluding) the next Interest Payment Date.

6 Redemption and Purchase

(a) Final Redemption: Unless previously redeemed or purchased and cancelled the Notes will be

redeemed at their principal amount on the Interest Payment Date falling on or nearest to 16

March 2029 (the “Maturity Date”). The Notes may not be redeemed at the option of the

Issuer other than in accordance with this Condition 6.(b) Redemption for Taxation Reasons: The Notes may be redeemed at the option of the Issuer in

whole but not in part at any time on giving not less than 30 nor more than 60 days’ notice to

the Noteholders in accordance with Condition 15 (which notice shall be irrevocable) and in

writing to the Trustee and the CMU Lodging and Paying Agent at their Early Redemption

Amount (Tax) together with interest (if any) accrued to but excluding the date fixed for

redemption if before giving such notice the Issuer satisfies the Trustee that as a result of any

change in or amendment to the laws of a Relevant Jurisdiction or any regulations or rulings

promulgated thereunder or any change in the official interpretation or official application of

such laws regulations or rulings which change or amendment (i) except as described in (B)

immediately below becomes effective on or after the Issue Date or (ii) in the case of any

successor to the Guarantor or the Issuer that is organised or tax resident in a jurisdiction that is

–– 99 ––not a Relevant Jurisdiction as of the Issue Date becomes effective on or after the date such

successor assumes the Guarantor’s or the Issuer’s obligations as applicable under the Notes

the Deed of Guarantee and the Trust Deed:

(1) the Issuer is or would be required on the next succeeding due date for a payment with

respect to the Notes to pay Additional Amounts with respect to the Notes as provided or

referred to in Condition 8;

(2) the Guarantor is or would be unable for reasons outside its control on the next

succeeding due date for a payment with respect to the Notes to procure payment by the

Issuer and with respect to a payment due or to become due under the Guarantee or the

Deed of Guarantee the Guarantor is or would be required on the next succeeding due

date for a payment with respect to the Notes to pay Additional Amounts as provided or

referred to in Condition 8 provided that where any such requirement to pay Additional

Amounts is due to taxes duties assessments or governmental charges of whatever

nature imposed levied collected withheld or assessed by or on behalf of the PRC the

Issuer shall only be permitted to redeem the Notes in accordance with this Condition

6(b) if such rate of withholding or deduction in respect of which Additional Amounts

are required to be paid is in excess of the Applicable PRC Rate;

and in each case such obligation cannot be avoided by the use of reasonable measures

available to the Guarantor the Issuer or any successor person as the case may be; provided

however that no such notice of redemption shall be given earlier than 90 days prior to the

earliest date on which the Issuer or the Guarantor as the case may be would be obliged to pay

such Additional Amounts if a payment in respect of the Notes were then due or (as the case

may be) a demand under the Guarantee were then made.“Applicable PRC Rate” means (i) in the case of deduction or withholding of PRC income tax

10 per cent. (ii) in the case of deduction or withholding of PRC value added tax (including

any related local levies) 6.00 per cent. or (iii) in the case of deduction or withholding of both

PRC income tax and PRC value added tax (including any related local levies) 16.70 per cent.Prior to the publication of any notice of redemption pursuant to this Condition 6(b) the Issuer

shall deliver or procure that there is delivered to the Trustee (I) an Officer’s Certificate (as

defined in the Trust Deed) of the Issuer (or as the case may be the Guarantor) stating that the

circumstances referred to in this Condition 6(b) prevail and setting out the details of such

circumstances and (II) an opinion in form and substance satisfactory to the Trustee of

independent legal advisers of recognised standing to the effect that the Issuer or (as the case

may be) the Guarantor has or will become obliged to pay such Additional Amounts as a result

of such change or amendment. The Trustee shall be entitled to accept such Officer’s Certificate

and opinion as sufficient evidence (without further investigation or query and without liability

to the Noteholders or any other person) of the satisfaction of the circumstances set out in this

Condition 6(b) in which event it shall be conclusive and binding on the Noteholders and the

Trustee shall be protected and shall have no liability to any Noteholder or any person for so

accepting and relying on such certificate or opinion. Upon the expiry of any such notice as is

referred to in this Condition 6(b) the Issuer shall be bound to redeem the Notes in accordance

with this Condition 6(b).(c) Redemption Upon a No Registration Event: Upon the occurrence of a No Registration

Event the Noteholder of any Note will have the right at such Noteholder’s option to require

the Issuer to redeem all but not part of that Noteholder’s Notes on the No Registration Event

Redemption Date at the Early Redemption Amount (No Registration Event) together with

–– 100 ––interest (if any) accrued to but excluding the No Registration Event Redemption Date. To

exercise such right the Noteholder must deposit at the Specified Office of the relevant Paying

Agent during normal business hours (being 9:00 a.m. to 3:00 p.m. Monday to Friday except

for public holidays in the location of the Specified Office of the relevant Transfer Agent or as

the case may be the Registrar) a duly completed and signed notice of redemption in the form

for the time being current obtainable from the Specified Office of the relevant Paying Agent

(a “No Registration Event Put Exercise Notice”) together with the Definitive Certificates

evidencing the Notes to be redeemed by not later than 30 days following a No Registration

Event or if later 30 days following the date upon which notice thereof is given toNoteholders by the Issuer in accordance with Condition 15. The “No Registration EventRedemption Date” shall be the fifth day after the expiry of such period of 30 days as referred

to above.A No Registration Event Put Exercise Notice once delivered shall be irrevocable and the

Issuer shall redeem the Notes subject to the No Registration Event Put Exercise Notice

delivered as aforesaid.The Issuer shall give notice to Noteholders in accordance with Condition 15 and the Trustee

and the CMU Lodging and Paying Agent in accordance with the Trust Deed and Agency

Agreement by not later than five days following the first day on which it becomes aware of the

occurrence of a No Registration Event which notice shall specify the transaction or

transactions that constitute the No Registration Event and the procedure for exercise by

Noteholders of their rights to require redemption of the Notes pursuant to this Condition 6(c).(d) Redemption Upon a Change of Control Triggering Event: Upon the occurrence of a

Change of Control Triggering Event the Noteholder of any Note will have the right at such

Noteholder’s option to require the Issuer to redeem all but not part of that Noteholder’s

Notes on the Change of Control Put Date at the relevant Early Redemption Amount (Change of

Control) together with accrued interest up to but excluding the Change of Control Put Date.To exercise such right the Noteholder of the relevant Note must deposit at the Specified

Office of any Transfer Agent or the Registrar during normal business hours (being 9:00 a.m. to

3:00 p.m. Monday to Friday except for public holidays in the location of the Specified Office

of the relevant Transfer Agent or as the case may be the Registrar) a duly completed and

signed notice of redemption in the form for the time being current obtainable from theSpecified Office of any Transfer Agent or the Registrar (a “Change of Control Put ExerciseNotice”) together with the Definitive Certificates evidencing the Notes to be redeemed by not

later than 60 days following a Change of Control Triggering Event or if later 60 days

following the date upon which notice thereof is given to Noteholders by the Issuer in

accordance with Condition 15. The “Change of Control Put Date” shall be the 14th day after

the expiry of such period of 60 days as referred to above.A Change of Control Put Exercise Notice once delivered shall be irrevocable and the Issuer

shall redeem the Notes subject to the Change of Control Put Exercise Notices delivered as

aforesaid.The Issuer shall give notice to Noteholders in accordance with Condition 15 and the Trustee

and the CMU Lodging and Paying Agent in accordance with the Trust Deed and Agency

Agreement by not later than 30 days following the first day on which it becomes aware of the

occurrence of a Change of Control Triggering Event which notice shall specify the transaction

or transactions that constitute the Change of Control Triggering Event and the procedure for

exercise by Noteholders of their rights to require redemption of the Notes pursuant to this

Condition 6(d).–– 101 ––(e) Make Whole Redemption at the Option of the Issuer: On giving not less than 30 nor more

than 60 days’ notice (a “Make Whole Optional Redemption Notice”) to the Trustee in

accordance with the Trust Deed and the Noteholders in accordance with Condition 15 the

Issuer may at any time and from time to time prior to 16 February 2029 (the “Par Call Date”)

redeem the Notes in whole or subject as provided in Condition 6(g) below in part at the

Make Whole Price together with interest (if any) accrued to but excluding the redemption

date (the “Make Whole Optional Redemption Date”) specified in the Make Whole Optional

Redemption Notice.In this Condition 6(e):

“Independent Investment Bank” means an independent investment bank or financial advisor

of international repute selected and appointed by the Issuer or the Guarantor at the cost of the

Issuer or the Guarantor as the case may be (and notice thereof is given to Noteholders in

accordance with Condition 15 and in writing to the Trustee and the CMU Lodging and Paying

Agent by the Issuer) for the purposes of performing any of the functions expressed to be

performed by it under this Condition 6(e);

“Make Whole Call Reference Rate” means the rate per annum equal to the semi-annual

equivalent yield to maturity derived from the average of the bid and asked prices of the

offshore China Government Bond denominated in Renminbi (Bloomberg ticker: CGB Govt or

any equivalent successor Bloomberg ticker that is publicly available) having a maturity equal

or closest to the Maturity Date as determined by the Independent Investment Bank in

accordance with the provisions hereof (the “Comparable China Government Bond”)

(expressed as a percentage of principal amount (rounded to three decimal places 0.0005 being

rounded upwards)) prevailing at 11:00 a.m. (Hong Kong time) on the third Make Whole

Determination Business Day preceding the Optional Redemption Date as displayed on the

Bloomberg page and as determined by the Independent Investment Bank. If on the third Make

Whole Determination Business Day preceding the Optional Redemption Date the rate per

annum equal to the semi-annual equivalent yield to maturity derived from the average of the

bid and asked prices of the China Government Bond ticker is not published or available the

Independent Investment Bank shall on the second Make Whole Determination Business Day

preceding such Optional Redemption Date calculate the Make Whole Call Reference Rate

based on the average of the bid and asked prices at 11:00 a.m. (Hong Kong time) of such

Comparable China Government Bond (expressed as a percentage of principal amount (rounded

to three decimal places 0.0005 being rounded upwards)) quoted in writing to the Independent

Investment Bank by any financial institutions that are recognised dealers or brokers in offshore

PRC Government Bonds;

“Make Whole Price” means with respect to a Note at any Make Whole Optional Redemption

Date and as determined by an Independent Investment Bank the amount that is the greater of

(i) 100 per cent. of the principal amount of the applicable Notes to be redeemed and (ii) the

present value at such Make Whole Optional Redemption Date of (A) the principal amount of

such Note on the Par Call Date plus (B) all required remaining scheduled interest payments

due on such Note through the Par Call Date (but excluding accrued and unpaid interest to the

Make Whole Optional Redemption Date) computed using a discount rate equal to the Make

Whole Call Reference Rate plus 10 basis points (all as determined by the Independent

Investment Bank); and

“Make Whole Determination Business Day” means a day other than a Saturday Sunday or

public holiday on which commercial banks and foreign exchange markets are open for general

business in Hong Kong.–– 102 ––For the avoidance of doubt neither the Trustee nor the Agents shall be responsible or liable for

making any calculations or determinations under this Condition 6(e)

(f) Par Redemption at the Option of the Issuer: On giving not less than 30 nor more than 60

days’ notice (an “Par Optional Redemption Notice”) to the Trustee in accordance with Trust

Deed and the Noteholders in accordance with Condition 15 the Issuer may at any time after

the Par Call Date redeem the Notes in whole or subject as provided in Condition 6(g) below

in part at 100 per cent. of their principal amount together with interest (if any) accrued to but

excluding the redemption date specified in the Par Optional Redemption Notice.(g) Partial Redemption: In the case of a partial redemption of Notes the Notes to be redeemed

(“Redeemed Notes”) will be selected by the Issuer individually by lot not more than 30 days

prior to the date fixed for redemption and a list of the serial numbers of such Redeemed Notes

will be published in accordance with Condition 15 not less than 15 days prior to the date fixed

for redemption.Whilst the Notes are evidenced by the Global Certificate in the case of a partial redemption of

Notes Redeemed Notes will be selected in accordance with the rules of the CMU.(h) Notice of redemption: All Notes in respect of which any notice of redemption is given under

this Condition 6 shall be redeemed on the date in such place and in such manner as specified

in such notice in accordance with this Condition 6. If there is more than one notice of

redemption given in respect of any Note (which shall include any notice given by the Issuer

pursuant to Condition 6(b) any No Registration Event Put Exercise Notice given by a

Noteholder pursuant to Condition 6(c) and any Change of Control Put Exercise Notice given

by a Noteholder pursuant to Condition 6(d)) the notice given first in time shall prevail and in

the event of two notices being given on the same date the first to be given shall prevail.Neither the Trustee nor any of the Agents shall be responsible for calculating or verifying any

calculations of any amounts payable under any notice of redemption or have a duty to verify

the accuracy validity and/or genuineness of any documents in relation to or in connection

thereto and none of them shall be liable to Noteholders the Issuer or any other person for not

doing so.(i) Purchase: The Issuer the Guarantor and their respective Subsidiaries may at any time

purchase Notes in the open market or otherwise at any price. The Notes so purchased while

held by or on behalf of the Issuer the Guarantor or any such Subsidiary prior to cancellation

pursuant to Condition 6(j) and the Agency Agreement shall not entitle the holder to vote at

any meetings of the holders of the Notes and shall not be deemed to be outstanding for certain

purposes including without limitation for the purpose of calculating quorums at meetings of

the holders or for the purposes of Conditions 9 12(a) and 14.(j) Cancellation: All Notes purchased by the Issuer the Guarantor or their respective Subsidiaries

shall be cancelled and may not be reissued or resold and the obligations of the Issuer and the

Guarantor in respect of any such Notes shall be discharged.(k) Definitions: In these Conditions:

“Change of Control” means the occurrence at any time of any of the following:

(i) the Guarantor ceasing to own directly or indirectly 100 per cent. of the Voting Shares of

the Issuer;

–– 103 ––(ii) China National Offshore Oil Corporation ceasing to own and control directly or

indirectly 40 per cent. of the Voting Shares of the Guarantor; or

(iii) the government of the People’s Republic of China ceasing to Control China National

Offshore Oil Corporation;

“Change of Control Triggering Event” means a Change of Control provided that in the

event that the Notes are on the Rating Date rated Investment Grade by two or more Rating

Agencies a Change of Control Triggering Event shall mean the occurrence of both a Change

of Control and a Rating Decline. No Change of Control Triggering Event will be deemed to

have occurred in connection with any particular Change of Control unless and until such

Change of Control has actually been consummated;

“Control” means the ownership or control of more than 50 per cent. of the voting rights of the

issued share capital of a Person or the right to appoint and/or remove all or the majority of the

members of the Person’s board of directors or other governing body whether obtained directly

or indirectly and whether obtained by ownership of share capital the possession of voting

rights contract or otherwise;

“Early Redemption Amount” means as applicable the Early Redemption Amount (Change

of Control) the Early Redemption Amount (No Registration Event) or the Early Redemption

Amount (Tax);

“Early Redemption Amount (Change of Control)” means in respect of any Note 101 per

cent. of its principal amount;

“Early Redemption Amount (No Registration Event)” means in respect of any Note its

principal amount;

“Early Redemption Amount (Tax)” means in respect of any Note its principal amount;

“Investment Grade” means a rating of “AAA” “AA” “A” or “BBB” as modified by a “+”or

“-”indication or an equivalent rating representing one of the four highest rating categories by

S&P or any of its successors or assigns; a rating of “Aaa” “Aa” “A” or “Baa” as modified by

a “1” “2”or “3”indication or an equivalent rating representing one of the four highest rating

categories by Moody’s or any of its successors or assigns; a rating of “AAA” “AA” “A” or

“BBB” as modified by a “+”or “-”indication or an equivalent rating representing one of the

four highest rating categories by Fitch or any of its successors or assigns; or the equivalent

ratings of any internationally recognised securities rating agency or agencies as the case may

be which shall have been designated by the Guarantor as having been substituted for S&P

Moody’s or Fitch or any combination thereof as the case may be;

A “No Registration Event” occurs when the Registration Condition has not been satisfied on

or prior to the Registration Deadline;

“Rating Date” means in connection with a Change of Control Triggering Event that date

which is 90 days prior to the earlier of (i) a Change of Control and (ii) a public notice of the

occurrence of a Change of Control or of the intention by the Guarantor or any other Person or

Persons to effect a Change of Control;

–– 104 ––“Rating Decline” means in connection with a Change of Control Triggering Event the

occurrence on or within six months after the date or public notice of the occurrence of a

Change of Control or the intention by the Guarantor or any other person or persons to effect a

Change of Control (which period shall be extended (by no more than an additional three

months after the consummation of the Change of Control) so long as the rating of the Notes is

under publicly announced consideration for possible downgrade by any of the Rating

Agencies) of any of the events listed below:

(i) in the event the Notes are (A) on the Rating Date (1) rated by three Ratings Agencies

and (2) rated Investment Grade by each such Rating Agency and (B) cease to be rated

Investment Grade by at least two of such Rating Agencies;

(ii) in the event the Notes are (A) on the Rating Date (1) rated by two but not more Ratings

Agencies and (2) rated Investment Grade by each such Rating Agency and (B) cease to

be rated Investment Grade by both such Rating Agencies; or

(iii) in the event the Notes are (A) on the Rating Date (1) rated by one Ratings Agency only

and (2) rated Investment Grade by each such Rating Agency and (B) cease to be rated

Investment Grade by such Rating Agency.The Trustee shall not be obliged to take any steps to ascertain whether a Change of Control

has occurred or may occur or to monitor the occurrence of any Change of Control and shall

not be liable to the Noteholders or any other person for not doing so; and

“Registration Condition” means the receipt by the Trustee of:

(i) a certificate in substantially the form set out in the Trust Deed of a director or duly

authorised officer of the Guarantor (who is also an Authorised Signatory of the

Guarantor) confirming the completion of the registration with SAFE of the Guarantee

and the Deed of Guarantee; and

(ii) a copy of the relevant SAFE registration evidence (業務 登記憑 證 ) and any other

document (if applicable) issued by SAFE evidencing the completion of the SAFE

registration each certified in English by such Authorised Signatory of the Guarantor to

be a true and correct copy of the original.Neither the Trustee nor any Agent shall have any obligation or duty to verify the accuracy

content completeness validity or genuineness of any documents in relation to or in connection

with the Registration Condition and none of them shall be liable to Noteholders or any other

person for not doing so.

7 Payments

(a) Method of payment:

(i) Payments of principal premium (if any) and interest due on the Notes shall be made

(subject to surrender of the relevant Definitive Certificates at the Specified Office of

any Agent if no further payment falls to be made in respect of the Notes represented by

such Definitive Certificates) in the manner provided in Condition 7(a)(ii) below.–– 105 ––(ii) Interest due on each Note represented by Definitive Certificates shall be paid to the

holder shown on the Register at the close of business on the fifth Payment Business Day

before the due date for payment thereof (the “Interest Record Date”). Payments of

interest on each Note shall be made in Renminbi by transfer to the registered account of

the relevant Noteholder. In these Conditions the “registered account” of a Noteholder

means the Renminbi account maintained by or on behalf of such holder with a bank in

Hong Kong that processes payments in Renminbi details of which appear in the

Register.Notwithstanding the foregoing so long as the Notes are represented by a Global

Certificate each payment in respect of the Global Certificate will be made to the person

shown as the holder of the Notes in the Register in each case at the close of business

day (being a day on which the CMU is open for business) before the relevant due date.Payment of interest or principal by the CMU Lodging and Paying Agent to the person

for whose account a relevant interest in the Global Note is credited as being held by the

CMU at the relevant time as notified to the CMU Lodging and Paying Agent by the

CMU in a relevant CMU Instrument Position Report (as defined in the relevant CMU

rules) or any other relevant notification by the CMU shall discharge the obligations of

the Issuer in respect of that payment.(iii) If the amount of principal being paid upon surrender of the relevant Definitive

Certificate is less than the outstanding principal amount of such Definitive Certificate

the Registrar will annotate the Register with the amount of principal so paid and will (if

so requested in writing by the Issuer or a Noteholder) issue a new Definitive Certificate

with a principal amount equal to the remaining unpaid outstanding principal amount. If

the amount of premium (if any) or interest being paid is less than the amount then due

the Registrar will annotate the Register with the amount of premium (if any) or interest

so paid.(b) Payments subject to fiscal laws: Payments on the Notes will be subject in all cases to (i) any

fiscal or other laws and regulations applicable thereto in the place of payment but without

prejudice to the provisions of Condition 8 and (ii) any withholding or deduction required

pursuant to an agreement described in Section 1471(b) of the U.S. Internal Revenue Code of

1986 as amended (the “Code”) or otherwise imposed pursuant to Sections 1471 through 1474

of the Code any regulations or agreements thereunder any official interpretations thereof or

without prejudice to the provisions of Condition 8 any law implementing an intergovernmental

approach thereto. No commissions or expenses shall be charged to the Noteholders in respect

of such payments.(c) Payments on Payment Business Days: Payment instructions (for value the due date or if the

due date is not Payment Business Day for value the next succeeding Payment Business Day)

will be initiated (i) (in the case of payments of principal premium and interest payable on

redemption) on the later of the due date for payment and the day on which the relevant

Definitive Certificate is surrendered (or in the case of part payment only endorsed) at the

Specified Office of a Paying Agent and (ii) (in the case of payments of interest payable other

than on redemption) on the due date for payment. A Holder of a Registered Note shall not be

entitled to any interest or other payment in respect of any delay in payment resulting from the

due date for a payment not being a Payment Business Day.–– 106 ––(d) Payment Business Day: In these Conditions “Payment Business Day” means a day (other

than a Saturday Sunday or public holiday) on which commercial banks are open for business

and settlement of Renminbi payments in Hong Kong and the city in which the Specified Office

of the Paying Agent is located and in the case of the surrender of a Definitive Certificate in

the place where the Definitive Certificate is surrendered. If any date for payment in respect of

any Note is not a Payment Business Day the Noteholder shall not be entitled to payment until

the next following Payment Business Day nor to any interest or other sum in respect of such

postponed payment.(e) Agents: The CMU Lodging and Paying Agent the Transfer Agent and the Registrar and their

initial Specified Offices and the Trustee and its principal place of business are listed below.The Agents act solely as agents of the Issuer and the Guarantor and do not assume any

obligation or relationship of agency or trust for or with any Noteholder. The Issuer and the

Guarantor reserve the right at any time with the prior written approval of the Trustee to vary or

terminate the appointment of any Agent and to appoint additional or other provided that it will

at all times maintain (i) a Trustee (ii) a Registrar (iii) a CMU lodging and paying agent in

Hong Kong (iv) a Transfer Agent and (v) such other agent as may be required by any stock

exchange on which the Notes may be listed.

8 Taxation

(a) Gross up: All payments of principal and interest in respect of the Notes and/or if the

Guarantee is called the Guarantee by or on behalf of the Issuer or the Guarantor shall be made

free and clear of and without withholding or deduction for or on account of any present or

future taxes duties assessments or governmental charges of whatever nature imposed levied

collected withheld or assessed by or on behalf of Singapore or the PRC in each case including

any political subdivision territory or possession thereof and any authority therein having

power to tax (each as applicable a “Relevant Jurisdiction”) unless the withholding or

deduction of such taxes duties assessments or governmental charges is required by law. In

that event the Issuer or (as the case may be) the Guarantor shall pay such additional amounts

(the “Additional Amounts”) as will result in receipt by the Noteholders after such withholding

or deduction of such amounts as would have been received by them had no such withholding

or deduction been required except that no such Additional Amounts shall be payable in respect

of any Note:

(i) held by or on behalf of a Noteholder which is liable to such taxes duties assessments

or governmental charges in respect of such Note by reason of its or a beneficial owner

having some connection with the Relevant Jurisdiction other than the mere holding of

the Note; or

(ii) where the relevant Note or Definitive Certificate is presented (where presentation is

required) or surrendered for payment more than 30 days after the Relevant Date except

to the extent that the Noteholder of such Note would have been entitled to such

Additional Amounts on presenting or surrendering such Note or Definitive Certificate

for payment on the last day of such period of 30 days; or

(iii) with respect to such taxes duties assessments or governmental charges in respect of

such Note that would not have been imposed but for the failure of the Noteholder or

beneficial owner to comply with a timely request of the Issuer or the Guarantor

addressed to the Noteholder of such Note to provide certification or information

–– 107 ––concerning the nationality residence or identity of the Noteholder or beneficial owner

of such Note if compliance is required as a precondition to relief or exemption from

such taxes duties assessments or governmental charges; or

(iv) with respect to any estate inheritance gift sale transfer personal property or similar

tax assessment or other similar governmental charge; or

(v) with respect to any such taxes duties assessments or governmental charges in respect

of such Note payable otherwise than by deduction or withholding from payments under

or with respect to the Note or Guarantee; or

(vi) any combination of the preceding items (i) through (v) above.Additional Amounts will not be paid with respect to any payment of the principal of or any

interest on any Note or under the Guarantee by or on behalf of the Issuer or the Guarantor to

any Noteholder thereof which is a fiduciary or partnership or any person other than the sole

beneficial owner of such payment to the extent that payment would be required by the laws of

the Relevant Jurisdiction to be included in the income of a beneficiary or settlor with respect to

the fiduciary a member of that partnership or a beneficial owner who would not have been

entitled to the Additional Amounts had that beneficiary settlor member or beneficial owner

been the Noteholder.(b) Taxing jurisdiction: If the Issuer or the Guarantor (or any successor of the Issuer or the Guarantor)

becomes subject at any time to any taxing jurisdiction other than Singapore or the PRC

references in these Conditions to Relevant Jurisdiction shall be construed to include such other

jurisdiction. Notwithstanding anything herein to the contrary in no event will the Issuer or the

Guarantor (or any successor of the Issuer or the Guarantor) pay any Additional Amounts in

respect of any taxes withholding or deduction imposed pursuant to the provisions of

Sections 1471 through 1474 of the U.S. Internal Revenue Code of 1986 as amended (including

any successor provisions or amendments thereof) any current or future regulations or

agreements thereunder any official interpretations thereof or any law implementing an

intergovernmental approach thereto.“Relevant Date” in respect of any Note means in relation to any payment whichever is the later of

(A) the date on which the payment in question first becomes due and (B) if the full amount payable

has not been received by the CMU Lodging and Paying Agent or the Trustee on or prior to such due

date the date on which (the full amount having been so received) notice to that effect has been given

to the Noteholders in accordance with Condition 15.Any reference in these Conditions to any payments in respect of the Notes shall be deemed also to

refer to any additional amounts which may be payable under this Condition or under any undertakings

given in addition to or in substitution for this Condition pursuant to the Trust Deed the Deed of

Guarantee and any other amount in the nature of principal or interest payable pursuant to these

Conditions.Neither the Trustee nor any Agent shall in any event be responsible for paying any tax duty assessments

charges withholding deduction or other payment referred to in this Condition 8 or otherwise or in

connection with the Notes or for determining whether such amounts are payable or the amount thereof

and shall not be responsible or liable for any failure by the Issuer the Guarantor or the Noteholders

or any other person to pay such tax duty assessment charges withholding deduction or other

payment in any jurisdiction or be responsible to provide any notice or information in relation to the

Notes in connection with payment of such tax duty assessment charges

–– 108 ––withholding deduction or other payment including without limitation any notice or information that

would permit enable or facilitate the payment of any principal premium (if any) interest or other

amount under or in respect of the Notes without deduction or withholding for or on account of any

tax duty assessment charge withholding deduction or other payment imposed by or in any

jurisdiction.

9 Events of Default

If any of the following events (each an “Event of Default”) occurs the Trustee at its absolute

discretion may and if so requested in writing by holders of at least 25 per cent. in nominal amount of

the Notes then outstanding or if so directed by an Extraordinary Resolution shall (subject in each case

to being indemnified and/or secured and/or pre-funded to its satisfaction) give notice to the Issuer

that the Notes are and they shall immediately become due and payable at their Early Redemption

Amount together (if applicable) with accrued interest; provided however that if any event specified

in Condition 9(a) or Condition 9(h) below occurs the Notes shall become immediately due and

payable without any declaration notification or other act on the part of the Trustee or any holders of

Notes:

(a) failure to pay principal of or premium on any Note within two business days after the date

such amount is due and payable upon optional redemption acceleration or otherwise;

(b) failure to pay interest on any Note within 30 days after the due date for such payment;

(c) failure by the Issuer or the Guarantor to comply with its obligations under Condition 6(c) or

Condition 6(d);

(d) failure to perform any other covenant or agreement of the Guarantor or the Issuer in the Trust

Deed or the Deed of Guarantee and such failure continues for 60 days after there has been

given by registered or certified mail to the Guarantor or the Issuer as the case may be by the

Trustee;

(e) the Guarantee shall cease to be in full force or effect or the Guarantor shall deny or disaffirm

its obligations under the Guarantee;

(f) (i) failure to pay upon final maturity (after giving effect to the expiration of any applicable

grace period therefor) the principal of any Indebtedness of the Guarantor the Issuer or any

Principal Subsidiary (ii) acceleration of the maturity of any Indebtedness of the Guarantor the

Issuer or any Principal Subsidiary following a default by the Guarantor the Issuer or such

Principal Subsidiary if such Indebtedness is not discharged or such acceleration is not

annulled within 10 days after receipt by the Trustee of the written notice from the Guarantor

or the Issuer as provided in the Trust Deed or the Deed of Guarantee or (iii) failure to pay any

amount payable by the Guarantor the Issuer or any Principal Subsidiary under any guarantee

or indemnity in respect of any Indebtedness of any other Person if such obligation is not

discharged or otherwise satisfied within 10 days after receipt by the Trustee of written notice

as provided in the Trust Deed or Deed of Guarantee; provided however that no such event set

forth in clause (i) (ii) or (iii) of this Condition 9(f) shall constitute an Event of Default unless

the aggregate outstanding Indebtedness to which all such events relate exceeds U.S.$150000000 (or its equivalent in any other currency);

(g) a decree or order is entered (i) for relief in respect of the Issuer the Guarantor or any Principal

Subsidiary in an involuntary case of winding up or bankruptcy proceeding under applicable

law or (ii) adjudging the Issuer the Guarantor or any Principal Subsidiary bankrupt or

–– 109 ––insolvent or seeking reorganisation winding up arrangement adjustment or composition of or

in respect of the Issuer the Guarantor or any Principal Subsidiary under applicable law or

appointing a custodian receiver liquidator assignee trustee sequestrator (or other similar official)

of the Issuer the Guarantor or any Principal Subsidiary or of any substantial part of any of

their properties or ordering the winding up or liquidation of any of their affairs and any

such decree or order remains unstayed and in effect for a period of 60 consecutive days; or

(h) the Issuer the Guarantor or any Principal Subsidiary institutes a voluntary case or proceeding

under applicable bankruptcy insolvency reorganisation or similar law or any other case or

proceedings to be adjudicated bankrupt or insolvent or the Issuer the Guarantor or any

Principal Subsidiary files a petition or answer or consent seeking reorganisation or relief under

applicable bankruptcy insolvency reorganisation or similar law or consents to the filing of

any such petition or to the appointment of or taking possession by a custodian receiver

liquidator assignee trustee sequestrator (or other similar official) of any of the Issuer the

Guarantor or any Principal Subsidiary or of any substantial part of its property or makes an

assignment for the benefit of creditors or admits in writing its inability to pay its debts

generally as they become due or takes corporate action in furtherance of any such action.The Trustee and the Agents shall not be required to take any steps to ascertain whether an Event of

Default or any Potential Event of Default has occurred and shall not be responsible or liable to the

Noteholders the Issuer the Guarantor or any other person for any loss arising from any failure to do

so. The Trustee and each Agent shall not be deemed to have knowledge of an Event of Default or any

Potential Event of Default unless and until it receives written notification of such Event of Default or

Potential Event of Default from the Issuer or the Guarantor describing the circumstances of such and

identifying the circumstances constituting such Event of Default or any Potential Event of Default.

10 Prescription

Claims against the Issuer and the Guarantor for payment in respect of the Notes shall be prescribed

and become void unless made as required by Condition 7 within a period of 10 years in the case of

principal or premium and five years in the case of interest from the appropriate Relevant Date.

11 Replacement of Certificates

If any Certificate is lost stolen mutilated defaced or destroyed it may be replaced at the Specified

Office of the Registrar or any Transfer Agent subject to all applicable laws or other relevant authority

requirements stock exchange and/or quotation system requirements upon payment by the claimant of

the expenses incurred in connection with such replacement and on such terms as to evidence security

indemnity and otherwise as the Issuer or such Agent may require (provided that the requirement is

reasonable in the light of prevailing market practice). Mutilated or defaced Certificates must be

surrendered before replacements will be issued.

12 Meetings of Noteholders; Modification and Waiver; Substitution

(a) Meetings of Noteholders: The Trust Deed contains provisions for convening meetings of

Noteholders (including meetings held by way of video or audio conference call) to consider

matters relating to the Notes including the modification of any provision of these Conditions

the Deed of Guarantee the Agency Agreement or the Trust Deed. Any such modification may

be made if sanctioned by an Extraordinary Resolution. Such a meeting may be convened by

the Issuer and the Guarantor (acting together) or by the Trustee and shall be convened by the

Trustee following the request in writing of Noteholders holding not less than 10 per cent. of

the aggregate principal amount of the outstanding Notes and subject to the Trustee being

–– 110 ––indemnified and/or secured and/or pre-funded to its satisfaction. The quorum at any meeting

convened to vote on an Extraordinary Resolution will be two or more Persons holding or

representing one more than 50 per cent. of the aggregate principal amount of the outstanding

Notes or at any adjourned meeting one or more Persons being or representing Noteholders

whatever the principal amount of the Notes held or represented; provided however that

Reserved Matters may only be sanctioned by an Extraordinary Resolution passed at a meeting

of Noteholders at which two or more Persons holding or representing not less than 75 per cent.or at any adjourned meeting 25 per cent. of the aggregate principal amount of the outstanding

Notes form a quorum. Any Extraordinary Resolution duly passed at any such meeting shall be

binding on all the Noteholders whether present or not.In addition a resolution in writing signed by or on behalf of holders of not less than 90 per

cent. of the aggregate principal amount of the then outstanding Notes who for the time being

are entitled to receive notice of a meeting of Noteholders under the Trust Deed or a resolution

passed by consent given by way of electronic consents given by or on behalf of the

Noteholders through the CMU will take effect as if it were an Extraordinary Resolution. Such

a resolution in writing may be contained in one document or several documents in the same

form each signed by or on behalf of one or more Noteholders.A “Reserved Matter” means any proposal: (i) to change any date fixed for payment of

principal or interest in respect of the Notes to reduce the amount of principal or interest

payable on any date in respect of the Notes or to alter the method of calculating the amount of

any payment in respect of the Notes on redemption or maturity or the date for any such

payment; (ii) to effect the exchange or substitution of the Notes for or the conversion of the

Notes into shares bonds or other obligations or securities of the Issuer the Guarantor or any

other person or body corporate formed or to be formed (other than as permitted under

Condition 12(c)); (iii) to change any obligation of the Guarantor or the Issuer to pay

Additional Amounts pursuant to Condition 8(a); (iv) to change the currency or place of

payment in which amounts due in respect of the Notes are payable; (v) to modify in any

manner adverse to the interest of the Noteholders any provision of the Deed of Guarantee

(other than as permitted under Condition 12(c)); (vi) to change the quorum required at any

meeting or the majority required to pass an Extraordinary Resolution or reduce the Relevant

Fraction (as defined in the Trust Deed) of outstanding Notes necessary to modify or amend the

Trust Deed; (vii) to reduce the premium payable upon the redemption or repurchase of any

Notes or change the time at which any Note may be redeemed or required to be repurchased

pursuant to Condition 6; or (viii) to amend this definition.An “Extraordinary Resolution” means a resolution passed at a meeting of the Noteholders

duly convened and held by a majority of not less than 75 per cent of the votes cast.(b) Modification and waiver: The Trustee may but shall not be obliged to without the consent

of the Noteholders agree to (i) any modification of these Conditions the Deed of Guarantee

the Agency Agreement or the Trust Deed (other than in respect of a Reserved Matter) which

is in the opinion of the Trustee (determined in its absolute discretion) proper to make if in

the opinion of the Trustee (determined in its absolute discretion) such modification will not be

materially prejudicial to the interests of Noteholders and to (ii) any modification of the Notes

the Deed of Guarantee the Agency Agreement or the Trust Deed which is of a formal minor

or technical nature or is to correct a manifest error or to comply with any mandatory provision

of applicable law.–– 111 ––In addition the Trustee may but shall not be obliged to without the consent of the

Noteholders authorise or waive any proposed breach or breach of the Notes the Deed of Guarantee

the Agency Agreement or the Trust Deed (other than in each case a proposed breach or

breach relating to the subject of a Reserved Matter) if in the opinion of the Trustee the

interests of the Noteholders will not be materially prejudiced thereby.Unless the Trustee agrees otherwise any such authorisation waiver or modification shall be

notified by or on behalf of the Issuer to the Noteholders as soon as practicable thereafter.(c) Substitution: The Trust Deed contains provisions under which the Guarantor may without the

consent of the Noteholders assume the obligations of the Issuer as principal debtor under the

Trust Deed and the Notes provided that certain conditions specified in the Trust Deed are

fulfilled including in the case of a substitution of the Issuer by a company other than the

Guarantor a requirement that the Guarantee is fully effective in relation to the obligations of

the new principal debtor under the Trust Deed and the Notes.No Noteholder shall in connection with any substitution be entitled to claim any

indemnification or payment in respect of any tax consequence thereof for such Noteholder

except to the extent provided for in Condition 8 (or any undertaking given in addition to or

substitution for it pursuant to the provisions of the Trust Deed).(d) Entitlement of Trustee: In connection with the exercise of its functions rights powers and

discretions (including but not limited to those referred to in this Condition 12) the Trustee shall

have regard to the interests of the Noteholders as a class and shall not have regard to the

consequences of such exercise for individual Noteholders and the Trustee shall not be entitled

to require on behalf of any Noteholder nor shall any Noteholder be entitled to claim from the

Issuer or the Guarantor any indemnification or payment in respect of any tax consequence of

any such exercise upon individual Noteholders.

13 Further Issues

The Issuer may from time to time without the consent of the Noteholders create and issue further

notes or bonds having the same terms and conditions as the Notes in all respects (or in all respects

except for the issue date the first payment of interest on them and the timing for complying with the

requirements set out in these Conditions in relation to the NDRC Post-Issuance Filing and the Cross-

Border Security Registration) and so that such further issue shall be consolidated and form a single

series with the outstanding Notes or upon such terms as the Issuer may determine at the time of their

issue. References in these Conditions to the Notes include (unless the context requires otherwise) any

further notes issued pursuant to this Condition 13 and consolidated and forming a single series with

the Notes. Any further notes consolidated and forming a single series with the outstanding Notes shall

be guaranteed by a new deed of guarantee or deed supplemental to the Deed of Guarantee.

14 Enforcement

The Trustee may at any time at its absolute discretion and without notice take or institute such

proceedings actions or steps as it thinks fit to enforce its rights under the Trust Deed and the Deed of

Guarantee in respect of the Notes but it shall not be bound to do so unless:

(a) it has been so requested in writing by the Noteholders of at least 25 per cent. of the aggregate

principal amount of the outstanding Notes or has been so directed by an Extraordinary

Resolution; and

–– 112 ––(b) it has been indemnified and/or pre-funded and/or provided with security to its satisfaction.No Noteholder may proceed directly against the Issuer or the Guarantor unless the Trustee having

become bound to do so fails to do so within a reasonable time and such failure is continuing.

15 Notices

Notices to Noteholders will be valid if (a) made in writing in English and mailed to them by

uninsured mail at the Issuer’s expense at their addresses which appear in the Register maintained by

the Registrar; or (b) published at the Issuer’s expense in a leading English language daily newspaper

published in Hong Kong or if such publication is not practicable in a leading English language daily

newspaper having general circulation in Asia. Any such notice shall be deemed to have been given on

the date of such publication or if published more than once on the first date on which publication is made.Until such time as any Certificates are issued and so long as the Global Certificate is held in its

entirety on behalf of the CMU Operator any notice to the holders of the Notes shall be validly given

by the delivery of the relevant notice to the CMU for communication by the CMU to each relevant

accountholder in substitution for notification as required by the Conditions. Indirect participants will

have to rely on the CMU participants (through whom they hold the Notes in the form of interests in

the Global Certificate) to deliver the notices to them subject to the arrangements agreed between the

indirect participants and the CMU participants.

16 Currency Indemnity

To the fullest extent permitted by law the obligations of the Guarantor or the Issuer to any holder of

Notes under the Trust Deed the Deed of Guarantee these Conditions or the Notes as the case may

be shall notwithstanding any judgment in a currency (the “Judgment Currency”) other than

Renminbi (the “Agreement Currency”) be discharged only to the extent that on the day following

receipt by such holder or the Trustee as the case may be of any amount in the Judgment Currency

such holder or the Trustee as the case may be may in accordance with normal banking procedures

purchase the Agreement Currency with the Judgment Currency. If the amount of the Agreement

Currency so purchased is less than the amount originally to be paid to such holder or the Trustee as

the case may be in the Agreement Currency the Guarantor and the Issuer agree as a separate

obligation and notwithstanding such judgment to pay the difference and if the amount of the

Agreement Currency so purchased exceeds the amount originally to be paid to such holder such

holder or the Trustee as the case may be agrees to pay to or for the account of the Guarantor or the

Issuer as the case may be such excess; provided that such holder or the Trustee as the case may be

shall not have any obligation to pay any such excess as long as a default by the Guarantor or the

Issuer in its obligations under the Trust Deed the Deed of Guarantee these Conditions or the Notes

has occurred and is continuing in which case such excess may be applied by such holder or the

Trustee as the case may be to such obligations.

17 Trustee and Agents

The Trust Deed contains provisions for the indemnification of the Trustee and for its relief from

responsibility including without limitation provisions relieving it from taking such steps and/or

actions and/or instituting such proceedings to enforce payment unless first indemnified and/or secured

and/or pre-funded to its satisfaction. The Trustee is entitled to enter into business transactions with

the Issuer the Guarantor any subsidiary of the Issuer and/or Guarantor and/or any entity related

(directly or indirectly) to the Issuer or the Guarantor without accounting for any profit.–– 113 ––None of the Trustee or any of the Agents shall be responsible for the performance by the Issuer the

Guarantor and any other person appointed by the Issuer and/or the Guarantor in relation to the Notes

of the duties and obligations on their part expressed in respect of the same and unless it has written

notice from the Issuer or the Guarantor to the contrary the Trustee and each Agent shall be entitled to

assume that the same are being duly performed. None of the Trustee or any Agent shall be liable to

any Noteholder or any other person for any action taken by the Trustee or such Agent in accordance

with the instructions of the Noteholders. The Trustee shall be entitled to rely on any direction request

or resolution of Noteholders given by holders of the requisite nominal amount of Notes outstanding or

passed at a meeting of Noteholders convened and held in accordance with the Trust Deed. Whenever

the Trustee is required or entitled by the terms of the Trust Deed the Agency Agreement or these

Conditions to exercise any discretion or power take any action make any decision or give any

direction the Trustee is entitled prior to its exercising any such discretion or power taking any such

action making any such decision or giving any such direction to seek directions from the

Noteholders by way of an Extraordinary Resolution and the Trustee is not responsible for any loss or

liability incurred by any person as a result of any delay in it exercising such discretion or power

taking such action making such decision or giving such direction where the Trustee is seeking such

directions or in the event that no such directions are received. The Trustee and the Agents shall not be

under any obligation to ascertain whether any Event of Default Default or Potential Event of Default

(as defined in the Trust Deed) as the case may be has occurred or may occur or to monitor

compliance with the provisions of the Trust Deed the Agency Agreement or these Conditions.The Trustee and the Agents may rely without liability to Noteholders on any report confirmation

opinion or certificate or any advice of any legal advisers accountants financial advisers financial

institution or any other expert whether or not addressed to them and whether their liability in relation

thereto is limited (by its terms or by any engagement letter relating thereto entered into by the Trustee

or any other person or in any other manner) by reference to a monetary cap methodology or

otherwise. The Trustee or any Agent may accept and shall be entitled to rely on any such report

confirmation opinion or certificate or advice and in such event such report confirmation opinion or

certificate or advice shall be binding on the Issuer the Guarantor the Noteholders.Each Noteholder shall be solely responsible for making and continuing to make its own independent

appraisal and investigation into the financial condition creditworthiness condition affairs status and

nature of the Issuer and its Subsidiaries and the Trustee shall not at any time have any responsibility

for the same and each Noteholder shall not rely on the Trustee in respect thereof.

18 Contracts (Rights of Third Parties) Act 1999

No rights are conferred on any person under the Contracts (Rights of Third Parties) Act 1999 to

enforce any term of the Notes but this does not affect any right or remedy of any person which exists

or is available apart from that Act and is without prejudice to the rights of the Noteholders under

Condition 14.

19 Governing Law

(a) Governing Law: The Notes the Deed of Guarantee the Trust Deed and the Agency

Agreement and any non-contractual obligations arising out of or in connection with the Notes

the Deed of Guarantee the Trust Deed and the Agency Agreement are all governed by and

shall be construed in accordance with English law.(b) Jurisdiction: The courts of Hong Kong have exclusive jurisdiction to settle any dispute (a

“Dispute”) arising out of or in connection with the Notes the Deed of Guarantee the Trust

Deed and/or the Agency Agreement including any non-contractual obligations arising out of

–– 114 ––or in connection with the Notes the Deed of Guarantee the Trust Deed and the Agency

Agreement. The Issuer agrees that the courts of Hong Kong are the most appropriate and

convenient courts to settle any Dispute and accordingly that it will not argue to the contrary.(c) Service of Process: Each of the Issuer and Guarantor agrees that the documents which start

any proceedings relating to a Dispute (“Proceedings”) and any other documents required to be

served in relation to those Proceedings may be served on it by being delivered to China

Oilfield Service Limited’s Hong Kong office at 65/F Bank of China Tower One Garden

Road Central Hong Kong or to such other person with an address in Hong Kong and/or at

such other address in Hong Kong as the Issuer or the Guarantor as the case may be may

specify by notice in writing to the Trustee. Nothing in this Condition 19(c) shall affect the

right of any Noteholder to serve process in any other manner permitted by law. This Condition

19(c) applies to Proceedings in Hong Kong and to Proceedings elsewhere.

(d) Consent to enforcement etc.: Each of the Issuer and the Guarantor consents generally in

respect of any Proceedings to the giving of any relief or the issue of any process in connection

with such Proceedings including (without limitation) the making enforcement or execution

against any property whatsoever (irrespective of its use or intended use) of any order or

judgment which is made or given in such Proceedings.(e) Waiver of immunity: To the extent that the Guarantor or the Issuer has or hereafter may

acquire any immunity (sovereign or otherwise) from any legal action suit or proceeding from

jurisdiction of any court or from set-off or any legal process (including any immunity from

jurisdiction or from service of process or except as provided below from any execution to

satisfy a final judgment or from attachment or in aid of such execution or otherwise) with

respect to itself or any of its property the Guarantor and the Issuer each irrevocably waives to

the fullest extent permitted under applicable law any such right of immunity or claim thereto

which may now or hereafter exist and agrees not to assert any such right or claim in any

action or proceeding against it arising out of or based on the Notes the Deed of Guarantee the

Guarantee or the Trust Deed.–– 115 ––SUMMARY OF PROVISIONS RELATING TO THE NOTES IN GLOBAL FORM

The Global Certificates contain provisions which apply to the Notes while they are in global form some of

which modify the effect of the Terms and Conditions of the Notes set out in this Offering Circular. The

following is a summary of certain of those provisions.Terms defined in the Terms and Conditions of the Notes set out in this Offering Circular have the meaning

in the paragraphs below.The Notes will be represented by one or more Global Certificates which will be registered in the name of

and lodged with a sub-custodian for the HKMA as CMU Operator.Under the Global Certificates the Issuer for value received will promise to pay such principal interest and

premium (if any) on the Notes to the Noteholder on such date or dates as the same may become payable in

accordance with the Terms and Conditions of the Notes.Owners of interests in the Notes in respect of which the Global Certificates are issued will be entitled to

have title to the Notes registered in their names and to receive individual Definitive Certificates if the CMU

or any other clearing system selected by the Issuer and approved in writing by the Trustee the CMULodging and Paying Agent and the Registrar through which the Notes are held (an “Alternative ClearingSystem”) is closed for business for a continuous period of 14 days (other than by reason of holidays

statutory or otherwise) or announces an intention permanently to cease business or does in fact do so.In such circumstances individual Definitive Certificates will be issued in an aggregate principal amount

equal to the principal amount of the Global Certificates. Such exchange will be effected in accordance with

the provisions of the Trust Deed the Agency Agreement and the regulations concerning the transfer and

registration of the Notes scheduled thereto and in particular shall be effected without charge to any

Noteholder or the Trustee but against such indemnity and/or security as the Registrar or the relevant Agent

may require in respect of any tax or other duty of whatsoever nature which may be levied or imposed in

connection with such exchange.The Issuer will cause sufficient individual Definitive Certificates to be executed and delivered to the

Registrar for completion authentication and despatch to the relevant Noteholders. A person with an interest

in the Notes in respect of which the Global Certificates are issued must provide the Registrar not less than

30 days’ notice at its specified office of such holder’s intention to effect such exchange and a written order

containing instructions and such other information as the Issuer and the Registrar may require to complete

execute and deliver such individual Definitive Certificates.In addition the Global Certificates will contain provisions which modify the Terms and Conditions of the

Notes as they apply to the Notes evidenced by the Global Certificates. The following is a summary of

certain of those provisions:

Payment

Payments of principal premium interest (if any) or any other amounts shall be made to the person(s) for

whose account(s) interests in the Global Certificate are credited (as set out in the records of the CMU) at the

close of business on the day fifteen calendar days immediately prior to the date for payment and save in the

case of final payment no presentation of the Global Certificate shall be required for such purpose.Notwithstanding the provisions of the preceding paragraph for so long as the Global Certificate is held by

or on behalf of the CMU Operator payments of interest premium (if any) or principal by the CMU Lodging

and Paying Agent to the person(s) (each a “CMU participant”) for whose account a relevant interest in the

–– 116 ––Global Certificate is credited as being held by the CMU at the relevant time shall discharge the obligations

of the Issuer in respect of that payment. Any payments by the CMU participants to indirect participants shall

be governed by arrangements agreed between the CMU participants and the indirect participants and will

continue to depend on the inter-bank clearing system and traditional payment methods. Such payments shall

be the sole responsibility of such CMU participants and the Issuer shall have no obligation or liability in

connection therewith. For these purposes a notification from the CMU shall be conclusive evidence of the

records of the CMU (save in the case of manifest error). Save in the case of final payment no presentation

of this Global Certificate shall be required for such purpose.Notices

So long as the Notes are represented by the Global Certificate and the Global Certificate is held by or on

behalf of the CMU Operator (or any Alternative Clearing System) notices required to be given in respect of

the Notes represented by the Global Certificate shall be given by the delivery of the relevant notice to the

CMU (or to such Alternative Clearing System) for communication by the CMU (or to such Alternative

Clearing System) to each relevant accountholder in substitution for notification as required by the Terms and

Conditions of the Notes. Indirect participants will have to rely on the CMU participants (or the direct

participants of such Alternative Clearing System) (through whom they hold the Notes in the form of

interests in the Global Certificate) to deliver the notices to them subject to the arrangements agreed between

the indirect participants and the CMU participants (or the direct participants of such Alternative Clearing

System).Calculation of Interest

So long as the Notes are represented by a Global Certificate and such Global Certificate is held on behalf of

a clearing system the Issuer has promised inter alia to pay interest in respect of such Notes from the Issue

Date in arrear at the rates on the dates for payment and in accordance with the method of calculation

provided for in the Conditions save that the calculation is made in respect of the total aggregate amount of

the Notes represented by such Global Certificate together with such other sums and additional amounts (if

any) as may be payable under the Terms and Conditions of the Notes in accordance with the Terms and

Conditions of the Notes.Notices

So long as the Notes are represented by the Global Certificate and the Global Certificate is held on behalf of

the CMU Operator any notice to the holders of the Notes shall be validly given by the delivery of the

relevant notice to the CMU for communication by the CMU to each relevant accountholder in substitution

for notification as required by the Terms and Conditions of the Notes. Indirect participants will have to rely

on the CMU participants (through whom they hold the Notes in the form of interests in the Global

Certificate) to deliver the notices to them subject to the arrangements agreed between the indirect

participants and the CMU participants.Meetings

For the purposes of any meeting of Noteholders the Noteholder represented by the Global Certificates shall

be treated as two persons for the purposes of any quorum requirements of a meeting of Noteholders and as

being entitled to one vote in respect of each CNY10000 in principal amount of Notes for which the Global

Certificates are issued.–– 117 ––Noteholder’s Redemption

The Noteholder’s redemption option in Condition 6 (Redemption and Purchase) of the Terms and

Conditions of the Notes may be exercised by the holder of the Global Certificates giving notice to the CMU

Lodging and Paying Agent of the principal amount of Notes in respect of which the option is exercised

within the time limits specified in the Terms and Conditions of the Notes.Issuer’s Redemption

The option of the Issuer provided for in Condition 6 (Redemption and Purchase) of the Terms and

Conditions of the Notes shall be exercised by the Issuer giving notice to the Noteholders within the time

limits set out in and containing the information required by the Terms and Conditions of the Notes.Transfers

Transfers of the beneficial interests in the Notes represented by the Global Certificates will be effected

through the records of the CMU (or any Alternative Clearing System) and their respective participants in

accordance with the rules and procedures of the CMU (or any Alternative Clearing System) and their

respective direct and indirect participants.Cancellation

Cancellation of any Note represented by the Global Certificates will be effected by a reduction in the

principal amount of the Notes in the register of Noteholders and the Global Certificates on their respective

presentation to or to the order of the Registrar for annotation (for information only) in schedule A thereto.Trustee’s Powers

In considering the interests of Noteholders while the Global Certificates are registered in the name of a

nominee for a clearing system the Trustee may to the extent it considers it appropriate to do so in the

circumstances but without being obligated to do so (a) have regard to any information as may have been

made available to it by or on behalf of the relevant clearing system or its operator as to the identity of its

accountholders (either individually or by way of category) with entitlements in respect of the Notes and (b)

consider such interests on the basis that such accountholders were the Noteholders in respect of which the

Global Certificates are issued.The Global Certificates shall not become valid for any purpose until authenticated by or on behalf of the

Registrar.–– 118 ––TAXATION

The information provided below does not purport to be a complete summary of certain tax laws and

practises currently applicable. It does not purport to be comprehensive and does not constitute legal or tax

advice. It does not consider any investor’s particular circumstances. Prospective investors should consult

their own professional advisors concerning the overall tax consequences of the purchase ownership and

disposition of any Notes arising under the laws of any applicable jurisdiction.PRC Taxation

Enterprise Income Tax

Pursuant to the EIT Law effective as at 1 January 2008 and further amended on 29 December 2018 and its

implementation regulations enterprises that are established under the laws of foreign countries and regions

but whose “de facto management bodies” are within the territory of the PRC are treated as PRC tax resident

enterprises for the purpose of the EIT Law and must pay enterprise income tax at the rate of 25% in respect

of their income sourced from both within and outside China. If the relevant PRC tax authorities decide in

accordance with applicable tax rules and regulations that the “de facto management body” of the Issuer is

within the territory of the PRC the Issuer may be held to be a PRC tax resident enterprise for the purpose of

the EIT Law and be subject to enterprise income tax at the rate of 25% on its income sourced from both

within and outside PRC.Taxation on Interest

Pursuant to the EIT Law and its implementation regulations any non-resident enterprise without

establishment or place of business within the PRC or that has an establishment or place of business in

the PRC but whose income has no actual connection to its establishment or place of business within the PRC

must pay enterprise income tax at the rate of 10% or a lower rate if tax treaty benefits are available on its

income sourced inside the PRC and such income tax must be withheld by the PRC payer. In the event the

Issuer is deemed to be a PRC tax resident enterprise by the PRC tax authorities in the future interest paid on

the Notes may treated as income derived from sources within the PRC in which case the Issuer would be

required to withhold income tax from the payments of interest in respect of the Notes to any non-PRC

enterprise holders of the Notes. The rates of PRC tax on interest may be reduced under an applicable income

tax treaty. Further in accordance with the Individual Income Tax Law of the PRC which was amended on

31 August 2018 and took effect on 1 January 2019 and its implementation regulations if the Issuer is

considered to be a PRC tax resident enterprise by the PRC tax authorities in the future interest payable to

non-resident individual holders of the Notes may be treated as income derived from sources within the PRC

and be subject to a 20% individual income tax which the Issuer would be obliged to withhold from

payments of interests to non-resident individual holders of the Notes. To the extent that the PRC has entered

into arrangements relating to the avoidance of double-taxation with any jurisdiction such as Hong Kong

that allow a lower rate of withholding tax such lower rate may apply to qualified holders of the Notes.As confirmed by the Issuer as at the date of this Offering Circular the Issuer has not been given notice or

informed by the PRC tax authorities that it is considered a PRC tax resident enterprise for the purpose of the

EIT Law. On that basis non-resident enterprise holders or non-resident individual holders of the Notes will

not be subject to income tax imposed by any governmental authority in the PRC in respect of the holding of

the Notes or any payment of interest made thereon. However there is no assurance that the Issuer will not

be treated as a PRC tax resident enterprise under the EIT Law and related implementation regulations in the

future.–– 119 ––In addition given the fact that the Guarantor is a PRC tax resident enterprise under the EIT Law and in the

event that the Guarantor is required to discharge its obligations under the Guarantee the Guarantor will be

obliged to withhold PRC enterprise income tax at the rate up to 10% on the payments of interest made by it

under the Guarantee to non-PRC resident enterprise Noteholders as such interest payment obligations will be

regarded as being derived from sources within the PRC. To the extent that the PRC has entered into

arrangements relating to the avoidance of double-taxation with any jurisdiction such as Hong Kong that

allow a lower rate of withholding tax such lower rate may apply to qualified non-PRC resident enterprise

Noteholders. Repayment of the principal will not be subject to PRC withholding tax.If the Issuer is required under the relevant PRC tax laws to withhold PRC income tax on its interest payable

to non-resident enterprise holders or non-resident individual holders of the Notes the value of investment in

the Notes may be materially and adversely affected. Prospective holders should consult their tax advisers as

to whether they may be able to claim the benefit of income tax treaties or agreements entered into between

PRC and other countries or areas if the Issuer is considered a PRC tax resident enterprise.Taxation on Capital Gains

The EIT Law and its implementation regulations impose a tax at the rate of 10% or a lower rate if tax treatybenefits are available on income derived from sources within the PRC realised by a “non- residententerprise” that does not have an establishment or place of business in the PRC or that has an establishment

or place of business in the PRC but the relevant gain is not effectively connected therewith. The Individual

Income Tax Law and its implementation regulations impose a tax at the rate of 20% on income derived from

sources within the PRC realised by non-resident individuals. If the Issuer is considered a PRC resident

enterprise by the PRC tax authorities in the future and if the capital gains realised from the transfer of the

Notes by holders of the Notes are treated as income derived from sources within the PRC such gains will be

subject to such PRC tax. To the extent that the PRC has entered into arrangements relating to the avoidance

of double-taxation with any jurisdiction such as Hong Kong that allow a lower rate of tax such lower rate

may apply to qualified non-resident holders of the Notes.VAT

On 23 March 2016 the Ministry of Finance and SAT issued the Circular 36 which was amended on 11 July

2017 and on 20 March 2019. Circular 36 provides for that the VAT pilot programme covers construction

industry real estate industry finance industry and life service industry on a nation-wide basis from 1 May

2016. Since then the income derived from the provision of financial services which attracted business tax

will be entirely replaced by and subject to VAT.On 25 December 2024 the NPC issued the New VAT Law which is effective on 1 January 2026. Pursuant

to the New VAT Law VAT is applicable where the entities or individuals provide services within the PRC.The revenues generated from the taxable sale of services by entities and individuals such as financial

services shall be subject to PRC VAT if the seller of the services is within the PRC or the services is

consumed within the PRC (including services provided to the entities or individuals located within the PRC

by the entities or individuals outside of the PRC). Accordingly if the Issuer is deemed to be a PRC resident

enterprise in the PRC by the PRC tax authorities the interest and other interest like earnings derived from

such products and received by a non-PRC resident Bondholder from the Issuer or the Company (in the event

that the Company is required to discharge its obligations under the Guarantee) may be subject to PRC VAT.The Issuer or the Company (if applicable) may be required to withhold VAT on payments of interest and

certain other amounts on the Bonds paid to Bondholders that are non-resident enterprises or individuals.–– 120 ––Additionally VAT is unlikely to be applicable to any transfer of Bonds between entities or individuals

located outside of the PRC and therefore unlikely to be applicable to gains realised upon such transfers of

Bonds but there is uncertainty as to the applicability of VAT if the seller of Bonds is located inside the

PRC.However the new VAT Law and its implementation together with other laws and regulations pertaining to

VAT are relatively new the interpretation and enforcement of such laws and regulations involve

uncertainties.Stamp Duty

No PRC stamp duty will be imposed on non-PRC Noteholders either (i) upon issuance of the Notes; or (ii)

upon a subsequent transfer of Notes to the extent that the register of holders of the Notes is maintained

outside the PRC and the issuance and the sale of the Notes is made outside of the PRC.Singapore Taxation

The statements made herein regarding Singapore taxation are general in nature and are based on certain

aspects of the current tax laws of Singapore and administrative guidelines and circulars issued by the Inland

Revenue Authority of Singapore (“IRAS”) and MAS in force as at the date of this Offering Circular and are

subject to any changes in such laws administrative guidelines or circulars or in the interpretation of these

laws administrative guidelines or circulars occurring after such date which changes could be made on a

retroactive basis including amendments to the Income Tax Act (Qualifying Debt Securities) Regulations to

reflect the amendments to the ITA in respect of the QDS scheme pursuant to the Income Tax (Amendment)

Act 2023. These laws administrative guidelines and circulars are also subject to various interpretations and

the relevant tax authorities or the courts could later disagree with the explanations or conclusions set out

below. Neither these statements nor any other statements in this Offering Circular are intended or are to be

regarded as advice on the tax position of any Noteholder or of any person acquiring selling or otherwise

dealing with the Notes or on any tax implications arising from the acquisition sale or other dealings in

respect of the Notes. The statements made herein do not purport to be a comprehensive or exhaustive

description of all the tax considerations that may be relevant to a decision to subscribe for purchase own or

dispose of the Notes and do not purport to deal with the tax consequences applicable to all categories of

investors some of which (such as dealers in securities or financial institutions in Singapore which have been

granted the relevant Financial Sector Incentive(s)) may be subject to special rules or tax rates. The

statements should not be regarded as advice on the tax position of any person and should be treated with

appropriate caution. Prospective Noteholders are advised to consult their own professional tax advisers as to

the Singapore or other tax consequences of the acquisition ownership of or disposal of the Notes including

in particular the effect of any foreign state or local tax laws to which they are subject. It is emphasised that

none of the Issuer the Initial Purchasers Guarantor the Trustee the Agent and any other persons involved

in the issuance of the Notes accepts responsibility for any tax effects or liabilities resulting from the

subscription for purchase holding or disposal of the Notes.Interest and Other Payments

Subject to the following paragraphs under Section 12(6) of the ITA the following payments are deemed to

be derived from Singapore:

1. any interest commission fee or any other payment in connection with any loan or indebtedness or

with any arrangement management guarantee or service relating to any loan or indebtedness which

is: (a) borne directly or indirectly by a person resident in Singapore or a permanent establishment in

–– 121 ––Singapore (except in respect of any business carried on outside Singapore through a permanent

establishment outside Singapore or any immovable property situated outside Singapore); or (b)

deductible against any income accruing in or derived from Singapore; or

2. any income derived from loans where the funds provided by such loans are brought into or used in

Singapore.Such payments where made to a person not known to the paying party to be a resident in Singapore for tax

purposes are generally subject to withholding tax in Singapore unless specifically exempted. The rate at

which tax is to be withheld for such payments (other than those subject to the 15% final withholding tax

described below) to non-resident persons (other than non-resident individuals) is currently 17%. The

applicable rate for non-resident individuals is currently 24%. However if the payment is derived by a person

not resident in Singapore from sources other than from its trade business profession or vocation carried on

or exercised by such person in Singapore and is not effectively connected with any permanent establishment

in Singapore of that person the payment is subject to a final withholding tax of 15%. The rate of 15% may

be reduced by applicable tax treaties subject to certain conditions being met.Certain Singapore-sourced investment income derived by individuals from financial instruments is exempt

from tax including:

1. interest;

2. discount income (not including discount income arising from secondary trading); and

3. early redemption fee and redemption premium from debt securities

except where such income is derived through a partnership in Singapore or is derived from the carrying on

of a trade business or profession.In addition as the issue of the Notes is jointly lead-managed by BOCI Asia Limited CLSA Singapore Pte

Ltd and J.P. Morgan Securities Asia Private Limited more than half of which are Specified Licensed

Entities (as defined below) at such time and the Notes are issued as debt securities before 31 December

2028 the Notes would be qualifying debt securities (“QDS”) for the purposes of the ITA to which the

following treatment shall apply:

1. subject to certain conditions having been fulfilled (including the furnishing to the MAS by the Issuer

or such other person as the MAS may direct of a return on debt securities for the Notes in the

prescribed format within such period as the MAS may specify and such other particulars in

connection with the Notes as the MAS may require) interest discount income early redemption fee

or redemption premium (collectively the “Qualifying Income”) from the Notes derived by a holder

who is not resident in Singapore and who (a) does not have any permanent establishment in

Singapore or (b) carries on any operation in Singapore through a permanent establishment in

Singapore but the funds used by that person to acquire the Notes are not obtained from such person’s

operation through a permanent establishment in Singapore are exempt from Singapore tax;

2. subject to certain prescribed conditions having been fulfilled (including the furnishing by the Issuer

or such other person as the MAS may direct to the MAS of a return on debt securities for the Notes

in the prescribed format within such period as the MAS may specify and such other particulars in

connection with the Notes as the MAS may require) Qualifying Income from the Notes paid by the

Issuer and derived by any company or body of persons (as defined in the ITA) in Singapore is subject

to tax at a concessionary rate of 10% (except for holders of the relevant Financial Sector Incentive(s)

who may be taxed at different rates); and

–– 122 ––3. subject to:

(a) the Issuer including in all offering documents relating to the Notes a statement to the effect

that any person whose interest discount income early redemption fee or redemption premium

derived from the Notes is not exempt from tax shall include such income in a return of income

made under the ITA; and

(b) the furnishing by the Issuer or such other person as the MAS may direct to the MAS of a

return on debt securities in the prescribed format for the Notes within such period as the MAS

may specify and such other particulars in connection with the Notes as the MAS may require

payments of Qualifying Income derived from the Notes are not subject to withholding of tax

by the Issuer.Notwithstanding the foregoing:

(A) if during the primary launch of the Notes the Notes are issued to fewer than four persons and 50% or

more of the issue of the Notes is beneficially held or funded directly or indirectly by related parties

of the Issuer the Notes would not qualify as QDS; and

(B) even though the Notes are QDS if at any time during the tenure of the Notes 50% or more of the

Notes which are outstanding at any time during the life of the Notes is beneficially held or funded

directly or indirectly by any related party(ies) of the Issuer Qualifying Income derived from the

Notes held by:

(i) any related party of the Issuer; or

(ii) any other person where the funds used by such person to acquire the Notes are obtained

directly or indirectly from any related party of the Issuer

shall not be eligible for the tax exemption or concessionary rate of tax of 10% as described above.(a) The term “Specified Licensed Entity” means any of the following persons:

(i) a bank or merchant bank licensed under the Banking Act 1970 of Singapore;

(ii) a finance company licensed under the Finance Companies Act 1967 of Singapore;

(iii) a person who holds a capital markets services licence under the SFA to carry on a business in

any of the following regulated activities:

(A) advising on corporate finance; or

(B) dealing in capital markets products.

(b) The term “related party” in relation to a person means any other person who directly or indirectly

controls that person or is controlled directly or indirectly by that person or where he and that other

person directly or indirectly are under the control of a common person.(c) The terms “early redemption fee” and “redemption premium” are defined in the ITA as follows:

(i) “early redemption fee” in relation to debt securities and QDS means any fee payable by the

issuer of the securities on the early redemption of the securities; and

–– 123 ––(ii) “redemption premium” in relation to debt securities and QDS means any premium payable by

the issuer of the securities on the redemption of the securities upon their maturity.References to “early redemption fee” and “redemption premium” in this Singapore tax disclosure have the

same meaning as defined in the ITA.Where interest discount income early redemption fee or redemption premium (i.e. the Qualifying Income)

is derived from the Notes by any person who is not resident in Singapore and who carries on any operations

in Singapore through a permanent establishment in Singapore the tax exemption available for QDS under

the ITA shall not apply if such person acquires such Notes using the funds and profits of such person’s

operations through a permanent establishment in Singapore. Any person whose interest discount income

early redemption fee or redemption premium (i.e. the Qualifying Income) derived from the Notes is not

exempt from tax is required to include such income in a return of income made under the ITA.Capital Gains

Any gains considered to be in the nature of capital made from the sale of the Notes are generally not taxable

in Singapore. However any gains derived by any person from the sale of the Notes which are gains from

any trade business profession or vocation carried on by that person if accruing in or derived from

Singapore may be taxable as such gains are considered revenue in nature.Under section 10L of the ITA gains received in Singapore by an entity of a relevant group from the sale or

disposal of any movable or immovable property outside Singapore will be treated as income chargeable to

tax under section 10(1)(g) of the ITA under certain circumstances. Debt securities will be deemed to be

located outside Singapore if the issuer thereof is incorporated outside Singapore or in the case of registered

debt securities the register or principal register (if there is more than one register) is located outside

Singapore regardless where the issuer is incorporated. If the Notes are deemed to be foreign assets gains

from their disposal will be subject to tax if an entity of a relevant group (other than an excluded entity)

disposed of the Notes on or after 1 January 2024. An entity is a member of a group of entities if its assets

liabilities income expenses and cash flows are (a) included in the consolidated financial statements of the

parent entity of the group; or (b) excluded from the consolidated financial statements of the parent entity of

the group solely on size or materiality grounds or on the grounds that the entity is held for sale. A group is a

relevant group if (a) the entities of the group are not all incorporated registered or established in Singapore;

or (b) any entity of the group has a place of business outside Singapore. An excluded entity is defined in

section 10L of the ITA to include a pure equity-holding company or any other entity with adequate

economic substance in Singapore taking into account factors enumerated in section 10L of the ITA.Noteholders are advised to consult their own tax advisors on the applicable tax treatment if they received

gains in Singapore from the disposal of the Notes.Noteholders who apply or who are required to apply the Financial Reporting Standard (“FRS”) 109 or

Singapore Financial Reporting Standard (International) 9 (“SFRS(I) 9”) (as the case may be) may for

Singapore income tax purposes be required to recognise gains or losses (not being gains or losses in the

nature of capital) on the Notes irrespective of disposal for tax purposes in accordance with the provisions

of FRS 109 or SFRS(I) 9 (as the case may be) (as modified by the applicable provisions of Singapore

income tax law) even though no sale or disposal of the Notes is made. Please see the section below on

“Adoption of FRS 109 or SFRS(I) 9 for Singapore Income Tax Purposes”.–– 124 ––Adoption of FRS 109 or SFRS(I) 9 for Singapore Income Tax Purposes

Section 34AA of the ITA requires taxpayers who comply or who are required to comply with FRS 109 or

SFRS(I) 9 (as the case may be) for financial reporting purposes to calculate their profit loss or expense for

Singapore income tax purposes in respect of financial instruments in accordance with FRS 109 or SFRS(I) 9(as the case may be) subject to certain exceptions. The IRAS has also issued a circular entitled “IncomeTax: Income Tax Treatment Arising from Adoption of FRS 109 – Financial Instruments”.Noteholders who may be subject to the tax treatment under Section 34AA of the ITA should consult their

own accountants and tax advisers regarding the Singapore income tax consequences of their acquisition

holding or disposal of the Notes.Estate Duty

Singapore estate duty has been abolished with respect to all deaths occurring on or after 15 February 2008.Hong Kong Taxation

Withholding tax

No withholding tax in Hong Kong should be payable on payments of principal (including any premium

payable on redemption of the Notes) or interest in respect of any capital gain arising from the sale of the

Notes.Profits tax

Hong Kong profits tax is chargeable on every person carrying on a trade profession or business in Hong

Kong in respect of profits arising in or derived from Hong Kong from such trade profession or business

(excluding profits arising from the sale of capital assets).Interest on the Notes may be deemed to be profits arising in or derived from Hong Kong from a trade

profession or business carried on in Hong Kong in the following circumstances:

(a) interest on the Notes is derived from Hong Kong and is received by or accrues to a corporation

carrying on a trade profession or business in Hong Kong;

(b) interest on the Notes is derived from Hong Kong and is received by or accrues to a person other than

a corporation carrying on a trade profession or business in Hong Kong and is in respect of the funds

of that trade profession or business;

(c) interest on the Notes is received by or accrues to a financial institution (as defined in the Inland

Revenue Ordinance (Cap. 112) of Hong Kong (the “IRO”)) and arises through or from the carrying

on by the financial institution of its business in Hong Kong; or

(d) interest on the Notes is received by or accrues to a corporation other than a financial institution and

arises through or from the carrying on in Hong Kong by the corporation of its intra-group financing

business (within the meaning of section 16(3) of the IRO).Sums received by or accrued to a financial institution by way of gains or profits arising through or from the

carrying on by the financial institution of its business in Hong Kong from the sale disposal or redemption of

Securities will be subject to Hong Kong profits tax. Sums received by or accrued to a corporation other than

–– 125 ––a financial institution by way of gains or profits arising through or from the carrying on in Hong Kong by

the corporation of its intra-group financing business (within the meaning of section 16(3) of the IRO) from

the sale disposal or other redemption of Notes will be subject to Hong Kong profits tax.Sums derived from the sale disposal or redemption of Notes will be subject to Hong Kong profits tax where

received by or accrued to a person other than a financial institution who carries on a trade profession or

business in Hong Kong and the sum has a Hong Kong source unless otherwise exempted. The source of

such sums will generally be determined by having regard to the manner in which the Notes are acquired and

disposed of.In addition with effect from 1 January 2024 pursuant to various foreign-sourced income exemption

legislation in Hong Kong (the “FSIE Amendments”) certain specified foreign-sourced income (including

interest dividend disposal gain or intellectual property income in each case arising in or derived from a

territory outside Hong Kong) accrued to an MNE entity (as defined in the FSIE Amendments) carrying on a

trade profession or business in Hong Kong is regarded as arising in or derived from Hong Kong and subject

to Hong Kong profits tax when it is received in Hong Kong. The FSIE Amendments also provide for relief

against double taxation in respect of certain foreign-sourced income and transitional matters.In certain circumstances Hong Kong profits tax exemptions (such as concessionary tax rates) may be

available. Investors are advised to consult their own tax advisors to ascertain the applicability of any

exemptions to their individual position.Stamp duty

No Hong Kong stamp duty should be chargeable upon the issue or transfer (for so long as the register of

holders of the Notes is maintained outside Hong Kong) of a Note.Estate duty

No Hong Kong estate duty should be payable in respect of the Notes.FATCA Withholding

Sections 1471-1474 of the U.S. Internal Revenue Code along with U.S. Treasury Department regulations

promulgated thereunder commonly known as “FATCA” generally require certain non-U.S. financial

institutions (“FFIs”) to report certain information on their account holders to the government of the United

States and require such institutions to withhold 30% from all or a portion of certain payments made to non-

compliant FFIs or other persons that fail to provide the financial institution information consents and forms

or other documentation that may be necessary for such financial institution to determine whether such

person is compliant with FATCA or otherwise exempt from FATCA withholding. Investors may be required

to provide certain information (which may include an IRS tax form) to the Issuer or other payors.This withholding currently applies to certain payments from sources within the United States and will apply

to “foreign passthru payments” (a term not yet defined) no earlier than 1 January 2019. Proposed U.S.Treasury regulations were recently published that delay the effective date of withholding on payments of

“foreign passthru payments” until the date that is two years after the date on which final U.S. Treasury

regulations defining the term “foreign passthru payment” are filed with the U.S. Federal Register. This

withholding would potentially apply to payments in respect of (i) any Notes characterised as debt (or which

are not otherwise characterised as equity and have a fixed term) for U.S. federal tax purposes that are issued

on or after the “grandfathering date” which is the date that is six months after the date on which final U.S.Treasury regulations defining the term foreign passthru payments are filed with the Federal Register or

which are materially modified on or after the grandfathering date and (ii) any Notes characterised as equity

–– 126 ––or which do not have a fixed term for U.S. federal tax purposes whenever issued. If Notes are issued before

the grandfathering date and additional Notes of the same series are issued on or after that date the

additional Notes may not be treated as grandfathered which may have negative consequences for the

existing Notes including a negative impact on market price.The application of FATCA to interest principal or other amounts paid with respect to the Notes and the

information reporting obligations of entities in the payment chain is still developing. In particular a number

of jurisdictions (including Singapore) have entered into or have announced their intention to enter into

intergovernmental agreements (or similar mutual understanding) with the United States (“IGAs”) which

modify the way in which FATCA applies in its jurisdictions. The full impact of such agreements (and the

laws implementing such an agreement in such jurisdictions) on reporting and withholding responsibilities

under FATCA is unclear. The Issuer to the extent it is an FFI and other entities in the payment chain may

be required to report certain information on their U.S. account holders to government authorities in their

respective jurisdictions or the United States in order (i) to obtain an exemption from FATCA withholding on

payments they receive and/or (ii) to comply with applicable law in its jurisdictions. It is not yet certain howthe United States and the jurisdictions which enter into IGAs will address withholding on “foreign passthrupayments” (which may include payments on the Notes) or if such withholding will be required at all. If an

amount in respect of FATCA withholding were to be deducted or withheld from interest principal or other

payments made in respect of the Notes neither the Issuer nor any paying agent nor any other person would

pursuant to the conditions of the Notes be required to pay additional amounts as a result of the deduction or

withholding. As a result investors may receive less interest or principal than expected.FATCA is particularly complex and its application is uncertain at this time. The above description is based

in part on regulations official guidance and IGAs all of which are subject to change possibly with

retroactive effect. Investors should consult their own tax advisers regarding how FATCA may affect them

based on their particular circumstances.–– 127 ––SUBSCRIPTION AND SALE

The Issuer and the Company have entered into a subscription agreement with the Initial Purchasers dated 9

March 2026 (the “Subscription Agreement”) pursuant to which and subject to certain conditions contained

therein the Issuer has agreed to sell to the Initial Purchasers and the Initial Purchasers have agreed to

severally but not jointly subscribe and pay for or to procure subscribers to subscribe and pay for the

aggregate principal amount of the Notes indicated in the following table:

Principal amount

of the Notes to be

Initial Purchasers subscribed

CNY

BOCI Asia Limited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1666670000

CLSA Singapore Pte Ltd . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1666670000

J.P. Morgan Securities Asia Private Limited . . . . . . . . . . . . . . . . . . . . . . . . . 1666660000

ABCI Capital Limited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . —

Agricultural Bank of China Limited Hong Kong Branch . . . . . . . . . . . . . . . . . —

Bank of China (Hong Kong) Limited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . —

Bank of Communications Co. Ltd. Hong Kong Branch . . . . . . . . . . . . . . . . . —

China Construction Bank (Asia) Corporation Limited . . . . . . . . . . . . . . . . . . . —

China Industrial Securities International Brokerage Limited . . . . . . . . . . . . . . . —

China International Capital Corporation Hong Kong Securities Limited . . . . . . . —

China Securities (International) Corporate Finance Company Limited . . . . . . . . . —

Citigroup Global Markets Limited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . —

CMB International Capital Limited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . —

CMBWing Lung Bank Limited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . —

Goldman Sachs (Asia) L.L.C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . —

ICBC International Securities Limited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . —

Total . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5000000000

The Subscription Agreement provides that the Initial Purchasers and their respective affiliates and their

respective directors officers and employees will be indemnified against certain liabilities in connection with

the offer and sale of the Notes. The Subscription Agreement provides that the obligations of the Initial

Purchasers are subject to certain conditions precedent and entitles the Initial Purchasers to terminate it in

certain circumstances prior to payment being made to the Issuer.The Initial Purchasers and their respective subsidiaries or affiliates may from time to time engage in

transactions with and perform services for the Issuer the Company and/or their respective subsidiaries in the

ordinary course of business.In connection with the offering of the Notes any Initial Purchasers and/or its respective affiliate(s) may act

as an investor for its own account and may take up Notes in the offering and in that capacity may retain

purchase or sell for its own account such securities and any securities of the Issuer and may offer or sell

such securities or other investments otherwise than in connection with the offering. Accordingly references

herein to the Notes being offered should be read as including any offering of the Notes to the Initial

Purchasers and/or their respective affiliates acting in such capacity. Such persons do not intend to disclose

the extent of any such investment or transactions otherwise than in accordance with any legal or regulatory

obligation to do so. The Initial Purchasers or their respective affiliates may purchase the Notes for its own

account or for the accounts of their customers and enter into transactions including credit derivative such as

asset swaps repackaging and credit default swaps relating to the Notes and/or other securities of ours or our

–– 128 ––subsidiaries or associates at the same time as the offer and sale of the Notes or in secondary market

transactions. Such transactions would be carried out as bilateral trades with selected counterparties and

separately from any existing sale or resale of the Notes to which this Offering Circular relates

(notwithstanding that such selected counterparties may also be purchasers of the Notes).In connection with this offering any of the Initial Purchasers appointed and acting in its capacity as a

stabilisation manager (the “Stabilisation Manager”) or any person acting for it may purchase and sell the

Notes in the open market. These transactions may to the extent permitted by applicable laws and

regulations include short sales stabilising transactions and purchases to cover positions created by short

sales. these activities may stabilise maintain or otherwise affect the market price of the Notes. In so doing

the Stabilisation Manager or any person acting on behalf of the Stabilisation Manager shall act as principal

and not as agent of the Issuer or the Company. However the Stabilisation Manager or anyone acting for it

is not obligated to do this. If these actions are commenced they shall be undertaken in accordance with

applicable laws and regulations and as a result thereof the price of the Notes may be higher than the price

that otherwise might exist in the open market. Any stabilisation action may begin on or after the date on

which adequate public disclosure of the terms of the Notes is made and if begun may cease at any time

and must end no later than the earlier of 30 days after the Issue Date of the Notes and 60 days after the date

of the allotment of the Notes. Any loss or profit sustained as a consequence of any such transactions or

stabilisation shall be for the account of the Stabilisation Manager.The Initial Purchasers and their respective affiliates are full service financial institutions engaged in various

activities which may include securities trading commercial and investment banking financial advisoryinvestment management principal investment hedging financing and brokerage activities (“BankingServices or Transactions”). The Initial Purchasers and their respective affiliates may have from time to time

performed and may in the future perform various Banking Services or Transactions with the Issuer or the

Company for which they have received or will receive fees and expenses.In connection with the offering of the Notes the Initial Purchasers and/or their respective affiliates or

affiliates of the Issuer and the Company may act as investors and place orders receive allocations and trade

the Notes for their own account and such orders allocations or trade of the Notes may be material. Such

entities may hold or sell such Notes or purchase further Notes for their own account in the secondary market

or deal in any other securities of the Issuer or the Company and therefore they may offer or sell the Notes

or other securities otherwise than in connection with the offering of the Notes. Accordingly references

herein to the offering of the Notes should be read as including any offering of the Notes to the Initial

Purchasers and/or their respective affiliates or affiliates of the Issuer and the Company as investors for their

own account. Such entities are not expected to disclose such transactions or the extent of any such

investment otherwise than in accordance with any applicable legal or regulatory requirements. If such

transactions occur the trading price and liquidity of the Notes may be impacted.Furthermore it is possible a significant proportion of the Notes may be initially allocated to and

subsequently held by a limited number of investors. If this is the case the trading price and liquidity of

trading in the Notes may be constrained. The Issuer the Company and the Initial Purchasers are under no

obligation to disclose the extent of the distribution of the Notes amongst individual investors otherwise than

in accordance with any applicable legal or regulatory requirements.In the ordinary course of their various business activities the Initial Purchasers and their respective affiliates

make or hold a broad array of investments and actively trade debt and equity securities (or related derivative

securities) and financial instruments (including bank loans) for their own account and for the accounts of

their customers and may at any time hold long and short positions in such securities and instruments. Such

investment and securities activities may involve securities and instruments of the Issuer or the Company

including the Notes and could adversely affect future trading price and liquidity of the Notes. The Initial

Purchasers and their respective affiliates may make investment recommendations and/or publish or express

–– 129 ––independent research views (positive or negative) in respect of the Notes or other financial instruments of

the Issuer or the Company and may recommend to their clients that they acquire long and/or short positions

in the Notes or other financial instruments of the Issuer or the Company.IMPORTANT NOTICE TO CMIS (INCLUDING PRIVATE BANKS)

This notice to CMIs (including private banks) is a summary of certain obligations the SFC Code imposes on

CMIs which require the attention and cooperation of other CMIs (including private banks). Certain CMIs

may also be acting as OC(s) for this offering and are subject to additional requirements under the SFC Code.Prospective investors who are the directors employees or major shareholders of the Issuer the Company a

CMI or its group companies would be considered under the SFC Code as having an Association with the

Issuer the Company the CMI or the relevant group company. CMIs should specifically disclose whether

their investor clients have any Association when submitting orders for the Notes. In addition private banks

should take all reasonable steps to identify whether their investor clients may have any Associations with the

Issuer the Company or any CMI (including its group companies) and inform the Initial Purchasers

accordingly.CMIs are informed that the marketing and investor targeting strategy for this offering includes institutional

investors sovereign wealth funds pension funds hedge funds family offices and high net worth individuals

in each case subject to the selling restrictions set out elsewhere in this Offering Circular.CMIs should ensure that orders placed are bona fide are not inflated and do not constitute duplicated orders

(i.e. two or more corresponding or identical orders placed via two or more CMIs). CMIs should enquire with

their investor clients regarding any orders which appear unusual or irregular. CMIs should disclose the

identities of all investors when submitting orders for the Notes (except for omnibus orders where underlying

investor information may need to be provided to the OC(s) when submitting orders). Failure to provide

underlying investor information for omnibus orders where required to do so may result in that order being

rejected. CMIs should not place “X-orders” into the order book.CMIs should segregate and clearly identify their own proprietary orders (and those of their group companies

including private banks as the case may be) in the order book and book messages.CMIs (including private banks) should not offer any rebates to prospective investors or pass on any rebates

provided by the Issuer or the Company. In addition CMIs (including private banks) should not enter into

arrangements which may result in prospective investors paying different prices for the Notes.The SFC Code requires that a CMI disclose complete and accurate information in a timely manner on the

status of the order book and other relevant information it receives to targeted investors for them to make an

informed decision. In order to do this those Initial Purchasers in control of the order book should consider

disclosing order book updates to all CMIs.When placing an order for the Notes private banks should disclose at the same time if such order is placed

other than on a “principal” basis (whereby it is deploying its own balance sheet for onward selling to

investors). Private banks who do not provide such disclosure are hereby deemed to be placing their order on

such a “principal” basis. Otherwise such order may be considered to be an omnibus order pursuant to the

SFC Code. Private banks should be aware that placing an order on a “principal” basis may require therelevant affiliated Initial Purchasers (if any) to categorize it as a proprietary order and apply the “proprietaryorders” requirements of the SFC Code to such order.–– 130 ––In relation to omnibus orders when submitting such orders CMIs (including private banks) that are subject

to the SFC Code should disclose underlying investor information in respect of each order constituting the

relevant omnibus order (failure to provide such information may result in that order being rejected).Underlying investor information in relation to omnibus orders should consist of:

* The name of each underlying investor;

* A unique identification number for each investor;

* Whether an underlying investor has any “Associations” (as used in the SFC Code);

* Whether any underlying investor order is a “Proprietary Order” (as used in the SFC Code);

* Whether any underlying investor order is a duplicate order.Underlying investor information in relat ion to omnibus order should be sent to:

debt.syndicate@bocigroup.com; projecthaihui@clsa.com; investor.info.hk.oc.bond.deals@jpmorgan.com;

fmd.dcm@abchina.com; Projecthaihui@bochk.com; dcm@bankcomm.com.hk; ccba_dcm@asia.ccb.com;

I B _ P r o j e c t H a i h u i @ c i c c . c o m . c n ; d c m _ h k@ c s c i . h k ; d e b t s y n d i c a t e @ c s c i . h k ;

bondissuance@cmbwinglungbank.com and gs-hk-dcm-omnibus@gs.com.To the extent information being disclosed by CMIs and investors is personal and/or confidential in nature

CMIs (including private banks) agree and warrant: (A) to take appropriate steps to safeguard the

transmission of such information to any OC(s); and (B) that they have obtained the necessary consents from

the underlying investors to disclose such information to any OC(s). By submitting an order and providing

such information to any OC(s) each CMI (including private banks) further warrants that they and the

underlying investors have understood and consented to the collection disclosure use and transfer of such

information by any OC(s) and/or any other third parties as may be required by the SFC Code including to

the Issuer the Company relevant regulators and/or any other third parties as may be required by the SFC

Code for the purpose of complying with the SFC Code during the bookbuilding process for this offering.CMIs that receive such underlying investor information are reminded that such information should be used

only for submitting orders in this offering. The Initial Purchasers may be asked to demonstrate compliance

with their obligations under the SFC Code and may request other CMIs (including private banks) to provide

evidence showing compliance with the obligations above (in particular that the necessary consents have

been obtained). In such event other CMIs (including private banks) are required to provide the relevant

Initial Purchasers with such evidence within the timeline requested.By placing an order prospective investors (including any underlying investors in relation to omnibus orders)are deemed to represent to the Initial Purchasers that it is not a Sanctions Restricted Person. A “SanctionsRestricted Person” means an individual or entity (a “Person”): (a) that is or is directly or indirectly owned

50 percent or more or controlled by a Person that is described or designated in (i) the most current

“Specially Designated Nationals and Blocked Persons” list (which as of the date hereof can be found at:

http://www.treasury.gov/ofac/downloads/sdnlist.pdf) or (ii) the Foreign Sanctions Evaders List (which as of

the date hereof can be found at: http://www.treasury.gov/ofac/downloads/fse/fselist.pdf) or (iii) the most

current “Consolidated list of persons groups and entities subject to EU financial sanctions” (which as of the

date hereof can be found at: https://data.europa.eu/data/datasets/consolidated-list-ofpersons-groups-and-

entities-subject-to-eu-financial-sanctionslocale=en); or (b) that is otherwise the subject of any sanctions

administered or enforced by any Sanctions Authority other than solely by virtue of the following or (vi) to

the extent that it will not result in violation of any sanctions by the CMIs: (i) their inclusion in the most

current “Sectoral Sanctions Identifications” list (which as of the date hereof can be found at: https://

www.treasury.gov/ofac/downloads/ssi/ssilist.pdf) (the “SSI List”) (ii) their inclusion in Annexes 3 4 5 and

6 of Council Regulation No. 833/2014 as amended by Council Regulation No. 960/2014 (the “EU–– 131 ––Annexes”) (iii) their inclusion in any other list maintained by a Sanctions Authority with similar effect to

the SSI List or the EU Annexes (iv) them being the subject of restrictions imposed by the U.S. Department

of Commerce’s Bureau of Industry and Security (“BIS”) under which BIS has restricted exports re-exports

or transfers of certain controlled goods technology or software to such individuals or entities; (v) thembeing an entity listed in the Annex to the new Executive Order of June 3 2021 entitled “Addressing theThreat from Securities Investments that Finance Certain Companies of the People’s Republic of China”

(known as the Non-SDN Chinese Military-Industrial Complex Companies List) which amends the ExecutiveOrder 13959 of November 12 2020 entitled “Addressing the threat from Securities Investments that FinanceChinese Military Companies”; or (vi) them being subject to restrictions imposed on the operation of an

online service Internet application or other information or communication services in the United States

directed at preventing a foreign government from accessing the data of U.S. persons; or (c) that is located

organized or a resident in a comprehensively sanctioned country or territory including Cuba Iran North

Korea Syria the Crimea region of Ukraine the Donetsk’s People’s Republic or Luhansk People’s Republic.“Sanctions Authority” means: (a) the United Nations; (b) the United States; (c) the European Union (or any

of its member states); (d) the United Kingdom; (e) the People’s Republic of China; (f) any other equivalent

governmental or regulatory authority institution or agency which administers economic financial or trade

sanctions; and (g) the respective governmental institutions and agencies of any of the foregoing including

without limitation the Office of Foreign Assets Control of the U.S. Department of the Treasury the United

States Department of State the United States Department of Commerce and His Majesty’s Treasury.General

None of the Issuer the Guarantor the Initial Purchasers the Trustee or the Agents represents that Notes may

at any time lawfully be sold in compliance with any applicable registration or other requirements in any

jurisdiction or pursuant to any exemption available thereunder or assumes any responsibility for facilitating

such sale.No representation is made that any action has been taken in any jurisdiction that would permit a public

offering of any of the Notes or possession or distribution of this Offering Circular or any other offering

material in any country or jurisdiction where action for that purpose is required.The Initial Purchasers and certain of their affiliates may have performed certain commercial banking

investment banking and advisory services for the Issuer the Guarantor and/or their respective affiliates from

time to time for which they have received customary fees and expenses and may from time to time engage

in transactions with and perform services for the Issuer the Guarantor and/or their respective affiliates in the

ordinary course of their business.United States of America

The Notes have not been and will not be registered under the Securities Act and may not be offered or sold

within the United States except pursuant to an exemption from or in a transaction not subject to the

registration requirements of the Securities Act. Accordingly the Notes are being offered and sold only

outside the United States in compliance with Regulation S under the Securities Act. Each Initial Purchaser

has represented and agreed that it has not offered or sold and agrees that it will not offer or sell any Notes

constituting part of its allotment within the United States except in accordance with Rule 903 of Regulation

S under the Securities Act. Accordingly neither it any of its affiliates nor any person acting on its or their

behalf has engaged or will engage in any directed selling efforts with respect to the Notes. Terms used in

this paragraph have the meaning given to them by Regulation S under the Securities Act.No contractual arrangement without consent: each of the Initial Purchasers has acknowledged that it has not

entered and will not enter into any contractual arrangement with respect to the distribution or delivery of the

Notes except with its affiliates or with the prior written consent of the Issuer and the Guarantor.–– 132 ––EEA

Each Initial Purchaser has represented and agreed that it has not offered sold or otherwise made available

and will not offer sell or otherwise make available any Notes which are the subject of the offering

contemplated by this Offering Circular to any retail investor in the EEA. For the purposes of this provision

the expression “retail investor” means a person who is one (or both) of the following:

(a) a retail client as defined in point (11) of Article 4(1) of MiFID II; or

(b) a customer within the meaning of the Insurance Distribution Directive where that customer would not

qualify as a professional client as defined in point (10) of Article 4(1) of MiFID II.United Kingdom

Each Initial Purchaser has represented and agreed that it has not offered sold or otherwise made available

and will not offer sell or otherwise make available any Notes which are the subject of the offering

contemplated by this Offering Circular to any retail investor in the United Kingdom. For the purposes of this

provision the expression “retail investor” means a person who is not a professional client as defined in

point (8) of Article 2(1) of UK MiFIR.Other Regulatory Restrictions in the United Kingdom

Each Initial Purchaser has represented and agreed that:

(a) it has only communicated or caused to be communicated and will only communicate or cause to be

communicated an invitation or inducement to engage in investment activity (within the meaning of

Section 21 of the FSMA) received by it in connection with the issue or sale of the Notes in

circumstances in which Section 21(1) of the FSMA does not apply to the Issuer and/or the Guarantor;

and

(b) it has complied and will comply with all applicable provisions of the FSMA with respect to anything

done by it in relation to the Notes in from or otherwise involving the United Kingdom.Italy

Each Initial Purchaser has represented warranted and agreed that the offering of the Notes has not been

registered pursuant to Italian securities legislation and accordingly no Notes may be offered sold or

delivered nor may copies of this Offering Circular or of any other document relating to the Notes be

distributed in the Republic of Italy except:

(a) to qualified investors (investitori qualificati) as defined pursuant to Article 100 of Legislative Decree

No. 58 of 24 February 1998 as amended (the “Financial Services Act”) and Article 34-ter first

paragraph letter (b) of CONSOB Regulation No. 11971 of 14 May 1999 as amended from time to

time (“Regulation No. 11971”); or

(b) in other circumstances which are exempted from the rules on public offerings pursuant to Article 100

of the Financial Services Act and Article 34-ter of the Regulation No. 11971.–– 133 ––Any offer sale or delivery of the Notes or distribution of copies of this Offering Circular or any other

document relating to the Notes in the Republic of Italy under (a) or (b) above must be:

(a) made by an investment firm bank or financial intermediary permitted to conduct such activities in the

Republic of Italy in accordance with the Financial Services Act CONSOB Regulation No. 16190 of

October 29 2007 (as amended from time to time) and Legislative Decree No. 385 of September 1

1993 as amended (the “Banking Act”); and

(b) in compliance with Article 129 of the Banking Act as amended and implementing guidelines of the

Bank of Italy as amended from time to time pursuant to which the Bank of Italy may request

information on the issue or the offer of securities in the Republic of Italy; and

(c) in compliance with any other applicable laws and regulations or requirement imposed by CONSOB or

other Italian authority.Any investor purchasing the Notes is solely responsible for ensuring that any offer sale delivery or resale

of the Notes by such investor occurs in compliance with applicable Italian laws and regulations.People’s Republic of China

Each Initial Purchaser has represented warranted and agreed that the Notes are not being offered or sold and

may not be offered or sold directly or indirectly in the People’s Republic of China (for such purposes not

including Hong Kong and Macau Special Administrative Regions or Taiwan region) except as permitted by

the securities laws of the People’s Republic of China.Hong Kong

Each Initial Purchaser has represented warranted and agreed that (i) it has not offered or sold and will not

offer or sell in Hong Kong by means of any document any Notes other than (a) to “professional investors”

as defined in the Securities and Futures Ordinance (Cap. 571) of Hong Kong and any rules made under that

Ordinance; or (b) in other circumstances which do not result in the document being a “prospectus” as

defined in the Companies (Winding Up and Miscellaneous Provisions) Ordinance (Cap. 32) of Hong Kong

or which do not constitute an offer to the public within the meaning of that Ordinance; and (ii) it has not

issued or had in its possession for the purposes of issue and will not issue or have in its possession for the

purposes of issue whether in Hong Kong or elsewhere any advertisement invitation or document relating to

the Notes which is directed at or the contents of which are likely to be accessed or read by the public of

Hong Kong (except if permitted to do so under the securities laws of Hong Kong) other than with respect to

the Notes which are or are intended to be disposed of only to persons outside Hong Kong or only to

“professional investors” as defined in the Securities and Futures Ordinance (Cap. 571) of Hong Kong and

any rules made under that Ordinance.Singapore

Each Initial Purchaser has acknowledged that the Final Offering Circular has not and will not be registered

as a prospectus with the Monetary Authority of Singapore. Accordingly each Initial Purchaser has

represented warranted and agreed that it has not offered or sold any Notes or caused the Notes to be made

the subject of an invitation for subscription or purchase and will not offer or sell any Notes or cause the

Notes to be made the subject of an invitation for subscription or purchase and has not circulated or

distributed nor will it circulate or distribute the Offering Circular or any other document or material in

connection with the offer or sale or invitation for subscription or purchase of Notes whether directly or

indirectly to persons in Singapore other than (i) to an institutional investor (as defined in Section 4A of the SFA)

pursuant to Section 274 of the SFA or (ii) to a relevant person (as defined in Section 275(2) of the

–– 134 ––SFA) pursuant to Section 275(1) of the SFA or any person pursuant to Section 275(1A) of the SFA and in

accordance with the conditions specified in Section 275 of the SFA and (where applicable) Regulation 3 of

the Securities and Futures (Classes of Investors) Regulations 2018 or (iii) otherwise pursuant to and in

accordance with the conditions of any other applicable provision of the SFA.Any reference to the SFA is a reference to the Securities and Futures Act 2001 of Singapore and a reference

to any term as defined in the SFA or any provision in the SFA is a reference to that term as modified or

amended from time to time including by such of its subsidiary legislation as may be applicable at the

relevant time.–– 135 ––GLOSSARY

This glossary contains certain definitions of technical terms used in this Offering Circular as they relate to

the Company CNOOC and offshore China. Some of these definitions may not correspond to standard

industry definitions. The Company has also included an explanation of certain terms of technical

measurements for reference.“2-D” . . . . . . . . . . . . . . . . . . . . seismic data collected in two dimensional form by utilising a

single sound source and one or more collection points; typically 2-

D is used to map geographical structures for initial analysis

“3-D” . . . . . . . . . . . . . . . . . . . . seismic data collected in three-dimensional form by utilising two

sound sources and two or more collection points; typically 3-D is

used to acquire refined seismic data and to raise the probability of

successful exploration well drilling“anchor handling towing and supply vessels that are equipped with winches capable of towing andvessels” or “AHTS vessels” . . . lifting and positioning their anchors and other marine equipment;

they range in size and capacity and are usually characterised in

terms of horsepower and towing capacity; for offshore China

service anchor handling towing supply vessels typically require

6000 horsepower or more to position and service semi-submersible

rigs drilling in deep water areas

“appraisal well” . . . . . . . . . . . . . an exploration well drilled after a successful wildcat well to gain

more information on a newly discovered oil or gas reserve

“casing” . . . . . . . . . . . . . . . . . . steel pipe that is screwed together and lowered into the well hole

after drilling; the casing along with the cement provide support to

the well bore against surrounding geological pressure so as to

maintain wellbore stability

“cluster well” . . . . . . . . . . . . . . multiple wells extending in a variety of directions drilled from a

single primary trunk wellbore that extends from the surface

“completion fluid” . . . . . . . . . . . fluid utilised to maintain downwell pressure and stability while

drilling through reservoir rock to minimise damage on the

formation’s surface

“crude oil” . . . . . . . . . . . . . . . . crude oil including condensate and gas liquids

“day rate” . . . . . . . . . . . . . . . . . fixed daily fee charged with respect to the services provided by a

drilling rig or off shore support vessel

“development well” . . . . . . . . . .wells drilled after appraisal wells for production purposes

“directional drilling” . . . . . . . . . . intentional drilling of well at a non-vertical or deviated angle in

order to improve reach or exposure to petroleum reservoirs; such

drilling is especially common for offshore wells given the multiple

number of wells which may be drilled from a single production

platform

–– 136 ––“drill bit”..............................bores

its way through the rock formations at the bottom of the well

“drill collar” . . . . . . . . . . . . . . . thick-walled tubular pieces machined from solid bars of steel

which are drilled from end to end to provide a passage to pumping

drilling fluids through the collars

“drill pipe” . . . . . . . . . . . . . . . . steel pipe screwed together by joints which connects the rotary

system on the rig to the drill collar and drill bit downwell

“drill string”....................................which

is driven by the rotary system of a rig

“exploration block” . . . . . . . . . . a specified area which is designated under a PSC for exploration

activity with the possibility for development of any potential

discoveries

“field” . . . . . . . . . . . . . . . . . . . a specified area within a block which is designated under a PSC

for development and production

“fracs” . . . . . . . . . . . . . . . . . . . fractures which are created in the reservoir rock to act as flow

channels for the oil and gas to the well; this process can be done

either with downwell perforation charges or through high pressured

water

“horizontal well” . . . . . . . . . . . . a well drilled by deviation drilling to achieve an inclination

typically greater than 70 degrees; such wells are drilled into

reservoir formations to allow for maximum crude oil recovery and

productivity

“HTHP” . . . . . . . . . . . . . . . . . . high temperature and high pressure

“jack-up rigs”....................................three

or four movable legs that can be extended (“jacked”) above or

below the drilling deck. During towing the legs of a jack-up rig are

elevated. When the rig reaches the drill site the crew jacks the legs

downward through the water and into the sea floor (or onto the sea

floor with mat supported jack-ups). This anchors the rig and holds

the drilling deck well above the waves

“PSV” . . . . . . . . . . . . . . . . . . . platform supply vessel

“reservoir rock” . . . . . . . . . . . . . subsurface porous rock formations. such as sandstone limestone

and dolomite in which gas or oil can be found

“rotary system”...................................uring

operations; rotary systems typically are either in the form of rotary

tables which are located on the drilling floor or in the form of

more advanced top drive systems located in the derrick swivel

–– 137 ––“seismic data”...........................ional

(3-D) form from sound wave reflections off of sub surface geology.

This data is used to understand and map geological structures for

exploratory purposes to predict the location of undiscovered

reserves

“semi-submersibles” . . . . . . . . . . semi-submersibles do not rest on the sea floor as jack-up rigs.Instead the working deck sits atop giant pontoons and hollow columns.These afloat above the water when the rig moves. At the drill site

the crew pumps seawater into the pontoons and columns to

partially submerge the rig hence the name semisubmersible. With

much of its bulk below the water’s surface the semi-submersible

becomes a stable platform for drilling moving only slightly with wind

and currents. Like jack-ups most semi-submersibles are towed to

the drill site. Because of their exceptional stability “semis” are well

suited for drilling in rough waters. Semi-submersibles can drill in

water as deep as 10000 feet

“standby vessels” . . . . . . . . . . . . vessels that typically remain on standby to provide support or

safety backup to offshore rigs and production facilities and are

equipped to provide first aid and shelter and in some cases may

also function as supply vessels

“streamers” . . . . . . . . . . . . . . . . clear flexible tubing containing numerous hydrophones used for

marine seismic surveys; streamers are owed behind seismic vessels

at controlled shallow water depths to collect seismic data

“top drive” . . . . . . . . . . . . . . . . an electrical rotary motor system built into a suspended swivel

which eliminates the need for a rotary table on the rig floor; top

drives provide more efficient and safer drilling by allowing drilling

to be done three joints at a time instead of one and also by

allowing rotation while entering and exiting the wellbore

“utility vessels” . . . . . . . . . . . . . vessels that provide service to offshore production facilities and

also support offshore maintenance and construction work; their

capabilities include the transportation of fuel water deck cargo and

personnel; they range in length from 96 feet to 135 feet and may

depending on the vessel design have enhanced features such as

fire-fighting and pollution response capabilities

“well completion”.................................epare

a well for production including casing and well treatment such as

acidising and fracing as well as the installation of necessary

equipment and devices

“well work-over” . . . . . . . . . . . . any work on a completed well designed to maintain restore or

improve production from a currently producing petroleum reservoir

this may include replacement of casing and well treatment such as

sand control fracing acidising

“wellbore” . . . . . . . . . . . . . . . . a well hole

–– 138 ––“wildcat well” . . . . . . . . . . . . . . an exploration well drilled in an area or geological formation that

has no known reserves or previous discoveries

The Company also uses the following technical measurements. The following is an explanation for

reference:

“km” . . . . . . . . . . . . . . . . . . . . kilometre which is equivalent to approximately 0.6214 mile

“km2” . . . . . . . . . . . . . . . . . . . square kilometre which is equivalent to approximately 0.386

square mile

“kw” . . . . . . . . . . . . . . . . . . . . kilowatts used to measure offshore supply vessel engine

“psi” . . . . . . . . . . . . . . . . . . . . pounds per square inch used to measure air or liquid

–– 139 ––GENERAL INFORMATION

Authorisations

We have obtained all necessary consents approvals and authorisations in the PRC and Singapore in

connection with the issue and performance of the Notes the execution and performance of the Guarantee.The entering into of the Trust Deed and the issue of the Notes have been authorised by resolutions of the

board of directors of the Issuer dated 18 August 2025. The entering into and performance of the Guarantee

has been authorised by resolutions of the Board of Directors of the Guarantor dated 25 March 2025 and

resolutions of the shareholders of the Guarantor dated 22 May 2025.Documents Available

For so long as any of the Notes are outstanding the Trust Deed in respect of the Notes may be inspected

free of charge upon prior written request and satisfactory proof of holding during normal business hours

(being between 9: 00 am and 3: 00 pm) on any weekday (except public holidays) at the corporate trust office

of the Trustee. For so long as any of the Notes are outstanding copies of our audited financial statements for

the past two fiscal years if any may be obtained during normal business hours on any weekday (except

public holidays) at the principal registered office of the Company at 201 Haiyou Avenue Yanjiao Economic

& Technological Development Zone Sanhe City Hebei Province 065201.Clearing System and Settlement

The Notes have been accepted for clearance through the CMU under Common Code 327715909 ISIN

HK0001249611 and CMU Instrument Number CILHFN26011. The Issuer’s Legal Entity Identifier Code is

300300WB9ZSCZYXDFJ80.

Listing of the Notes

Application will be made to the Hong Kong Stock Exchange for the listing of and permission to deal in the

Notes by way of debt issues to Professional Investors only and such permission is expected to become

effective on or about 17 March 2026.No Material Adverse Change

Save as disclosed in this Offering Circular there has been no significant change in the financial or trading

position of the Group since 30 June 2025 and there has been no material adverse change in the financial

position or prospects of the Group since 30 June 2025.Litigation

Other than as disclosed in the Offering Circular neither the Issuer nor any other member of the Group is or

has been involved in any governmental legal or arbitration proceedings (including any such proceedings

which are pending or threatened of which the Issuer is aware) in the 12 months preceding the date of this

document which may have or have in such period had a significant effect on the financial position or

profitability of the Issuer or the Group.–– 140 ––Auditors

The consolidated financial statements of the Group for the years ended 31 December 2023 and 2024

contained in this Offering Circular have been audited by Ernst & Young as stated in their reports. The

consolidated financial statements of the Group for the six months ended 30 June 2024 and 2025 contained in

this Offering Circular have been reviewed by Ernst & Young as stated in their report. Ernst & Young has

given and has not withdrawn its written consent to the issue of this Offering Circular with the references

herein to its name and where applicable reports in the form and context in which they appear in this

Offering Circular.–– 141 ––INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

Page

Audited Consolidated Financial Statements as at and for the Year Ended 31 December 2023

Independent Auditor’s Report........................F-2

Consolidated Statement of Profit or Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-7

Consolidated Statement of Comprehensive Income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-8

Consolidated Statement of Financial Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-9

Consolidated Statement of Changes in Equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-11

Consolidated Statement of Cash Flows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-12

Notes to Consolidated Financial Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-13

Audited Consolidated Financial Statements as at and for the Year Ended 31 December 2024

Independent Auditor’s Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-106

Consolidated Statement of Profit or Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-111

Consolidated Statement of Comprehensive Income . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-112

Consolidated Statement of Financial Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-113

Consolidated Statement of Changes in Equity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-115

Consolidated Statement of Cash Flows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-116

Notes to Consolidated Financial Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-117

Reviewed Consolidated Financial Statements as at and for the Six Months Ended 30 June 2025

Independent Auditor’s Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-202

Interim Condensed Consolidated Statement of Profit or Loss . . . . . . . . . . . . . . . . . . . . . . . . . F-203

Interim Condensed Consolidated Statement of Comprehensive Income . . . . . . . . . . . . . . . . . . . F-204

Interim Condensed Consolidated Statement of Financial Position . . . . . . . . . . . . . . . . . . . . . . . F-205

Interim Condensed Consolidated Statement of Changes in Equity . . . . . . . . . . . . . . . . . . . . . . F-207

Interim Condensed Consolidated Statement of Cash Flows . . . . . . . . . . . . . . . . . . . . . . . . . . . F-208

Notes to Interim Condensed Consolidated Financial Information . . . . . . . . . . . . . . . . . . . . . . . F-209

The financial statements in this section titled “Index to Consolidated Financial Statements” have been

reproduced from the annual reports of China Oilfield Services Limited (中海油田服務股份有限公司) for

the financial years ended 31 December 2023 and 2024 respectively and from the interim report of China

Oilfield Services Limited (中海油田服務股份有限公司) for the six months ended 30 June 2025 and have

not been specifically prepared for inclusion in this Offering Circular. Prospective investors should read the

consolidated financial data in conjunction with the related the notes.–– F-1 ––REGISTERED OFFICE OF THE ISSUER REGISTERED OFFICE OF THE COMPANY

COSL Singapore Capital Ltd. China Oilfield Services Limited

3 Benoi Road (中海油田服務股份有限公司) No.

COSL (Singapore) Base 1581 Haichuan Road

Singapore 629877 Tanggu Ocean Hi-tech Zone

Binhai Hi-tech Development District

Tianjin People’s Republic of China

TRUSTEE CMU LODGING AND PAYING AGENT

REGISTRAR AND TRANSFER AGENT

Citicorp International Limited Citicorp International Limited

40/F Champion Tower 9th Floor Citi Tower One Bay East

3 Garden Road 83 Hoi Bun Road

Central Hong Kong Kwun Tong Kowloon

Hong Kong

LEGAL ADVISORS TO THE ISSUER AND THE COMPANY

As to English law As to PRC law As to Singapore law

Linklaters King & Wood Mallesons Rajah & Tann Singapore LLP

11th Floor 18th Floor East Tower 9 Straits View #06-07

Alexandra House World Financial Center Marina One West Tower

Chater Road Central No.1 Dongsanhuan Zhonglu Singapore 018937

Hong Kong Chaoyang District

Beijing 100020

P. R. China

LEGAL ADVISORS TO THE INITIAL PURCHASERS

As to English law As to PRC law

Sidley Austin LLP JunHe LLP

70 St Mary Axe 20th Floor China Resources Building

London EC3A 8BE 8 Jianguomenbei Avenue

United Kingdom Beijing People’s Republic of China

LEGAL ADVISORS TO THE TRUSTEE

As to English law

Sidley Austin LLP

70 St Mary Axe

London EC3A 8BE

United Kingdom

AUDITORS TO THE GUARANTOR

Ernst & Young

27/F One Taikoo Place

979 King’s Road

Quarry Bay Hong Kong

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