Stock Code: 200771 Stock ID: Hangqilun B Announcement No.:2025-134

Hangzhou Turbine Power Group Co. Ltd.Prompting Announcement for B-Share Investors on Declaring Securities

Accounts

The members of the Board and the Company acknowledge being responsible for the truthfulness

accuracy and completeness of the announcement. There are no false records misleading

statements or significant omissions in this announcement.Hangzhou Hirisun Technology Incorporated .(hereinafter referred to as "Hirisun") plans to

absorb and merge Hangzhou Turbine Power Group Co. Ltd. (hereinafter referred to as "HTC" or

the "Company") by issuing A-shares to all share exchange shareholders of HTC(hereinafter

referred to as the "Transaction"). The relevant matters of the Transaction have been approved at

HTC's Second extraordinary general meeting of shareholders in 2025 and have obtained the

approval from the China Securities Regulatory Commission (hereinafter referred to as the "CSRC")

by the document "Approval of Registration for Hangzhou Hirisun Technology Incorporated. to

Absorb and Merge Hangzhou Turbine Power Group Co. Ltd." (No. 2141 [2025]CSRC Permit).According to the merger plan the Company submitted an application for the delisting of its shares

to the Shenzhen Stock Exchange (hereinafter referred to as the “SZSE”) on November 26 2025.The Shenzhen Stock Exchange approved the Company's application for the delisting of its shares on

December 18 2025the Company will initiate the process of converting HTC (200771) B shares

into Hirisun (300277) A shares. To ensure that B-share investors who hold their shares until the

final trading day and participate in the share conversion are informed of the relevant changes and

can complete the conversion smoothly the Company hereby presents the following points to its

B-share investors:

I. Important Notice

B-share investors are requested to carefully read the "Operational Guidelines for the Conversion

of A and B Share Securities Accounts in the Share Exchange Absorption Merger of Hangzhou

Turbine Power Group Co. Ltd. by Hangzhou Hirisun Technology Incorporated.Namely the

Related Party Transaction" announced by the Company on December 202025（AnnouncemberNo:2025-136）.II. Association of HTC B-Share Investors’ One-Code Account (For Domestic Individual

Investors Only)

After the launch of the unified account platform by the Shenzhen Branch of China Securities

Depository and Clearing Corporation Limited (hereinafter referred to as "CSDC") a One-Code

account is established for investors based on their existing Shanghai and Shenzhen A and B share

securities accounts. This account serves as a master account to record the investor’s identity

information and securities assets while the original securities accounts function as sub-accounts

for investment transactions. A linkage is established between the One-Code account and the

sub-accounts.

1. For investors who have corresponding A and B share securities accounts under One-Code

Account and whose association has been confirmed after HTC's B-share exit registration

Hirisun's A shares will be initially registered in the investor's A-share securities account.For investors who have two or more A-share securities accounts under One-Code Account and

whose association has been confirmed it is recommended that the investor and the original

B-share custodian securities company choose the A-share securities account for the initial

registration of Hirisun's A shares in the following order: first select the A-share securities account

whose information declaration securities company is the same as the HTC B-share custodian

securities company; if not applicable then choose the A-share securities account with the most

recent account opening date as the A-share securities account for the initial registration of

Hirisun's A shares.

2. For investors who have both A-share and B-share securities accounts under One-Code

Account but whose association has not been confirmed they can complete the association

confirmation procedures at the securities company where their B-share or A-share securities

account is located before the declaration deadline.

3. For investors who have a B-share securities account under One-Code Account but do not

yet have an A-share securities account they can open an A-share securities account and confirm

the associated relationship before the declaration deadline. It is recommended that investors

handle the opening of a new A-share securities account at the branch of the securities company

where their B-share securities account is held.After the declaration deadline investors with the One-Code Accountwho lack acorresponding A-share securities account Hirisun will apply to China Securities Depository and

Clearing Corporation to allocate a transfer registration restricted account for the investor. After the

deregistration of HTC B-shares Hirisun's A-share holdings will be registered in the investors'

transfer registration restricted accounts.It is especially important for investors to first verify with the securities company where their

B-share securities account is held whether their A-share and B-share securities accounts are under

the same One-Code Account and whether the association has been confirmed. If their A-share and

B-share securities accounts are not under the same One-Code Account or the association has not

been confirmed investors shall contact the securities company handling their B-share account as

soon as possible to update their account information and complete the association confirmation

procedures.III. Follow-up Operation Procedures and Arrangements

After the date of the Company's delisting registration China Securities Depository and Clearing

Corporation will issue a notice to the original B-share custodian securities companies and

custodian banks (hereinafter collectively referred to as the “custodian institutions”). The relevant

entities shall in accordance with the requirements of the notice promptly inform investors to

declare their Shenzhen A-share securities accounts and custodian units before the declaration

deadline complete the confirmation and submission of Shenzhen A-share securities account

associations on time and after the declaration deadline promptly inform investors of the allocated

Shenzhen transfer registration restricted account information It is recommended to organize the

completion of the procedures for opening a fund account and other related formalities.On December 26 2025China Securities Depository and Clearing Corporation (CSDC) will split the

data of investors' B-share securities accounts according to the corresponding custodian institutions

of HTC B-shares and then send it to each custodian institutions D-COM mailbox.Each custodian institutions can download the investors' B-share account data through the D-COM

user mailbox organize the investors to independently declare their Shenzhen A-share securities

accounts and custodian units for registering Hirisun's A-share issuance and clearly inform

investors that if they do not declare or fail to correctly declare their A-share securities accounts

before the declaration deadline it will be deemed as consent for CSDC to uniformly allocate

Shenzhen transfer registration restricted accounts.From the declaration start date (December 262025) to the declaration end date (January 82026)the custodian institutions shall promptly notify investors to declare their Shenzhen A-share

securities accounts and custody units and collect and verify that the declared Shenzhen A-share

accounts and their Shenzhen B-share accounts belong to the same One-Code Account. Each

custodian institutions shall submit the investors' declared Shenzhen A-share accounts to CITIC

Securities Co. Ltd. in accordance with the relevant notice of China Securities Depository and

Clearing Corporation Limited. CITIC Securities Co. Ltd. will then consolidate and submit them to

the Company. After the Company verifies them as correct they will be submitted to China

Securities Depository and Clearing Corporation Limited.This announcement is hereby made.The Board of Directors of Hangzhou Turbine Power Group Co. Ltd.December 202025