Stock Code: 300277 Stock ID: Hirisun Announcement No.:2026-005

Prompting Announcement on Securities Companies Handling the Opening of

Foreign Exchange Bank Accounts and Related Foreign Exchange Services for

Overseas Investors

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.Important Note:

This announcement only concerns the original HTC B overseas investors and the custodial

securities companies where the investors hold their accounts.Hangzhou Hirisun Technology Incorporated.(hereinafter referred to as “Hirisun” or “theCompany”) has obtained the "Approval of Registration for Hangzhou Hirisun Technology

Incorporated to Absorb and Merge Hangzhou Turbine Power Group Co. Ltd. by CSRC" (No.

2141 [2025]CSRC Permit)from the China Securities Regulatory Commission regarding the

issuance of A-shares to all the shareholders of Hangzhou Turbine Power Group Co. Ltd.(hereinafter referred to as “HTC”) in a share exchange for the absorption and merger of HTC.According to the "Guidelines for Investors on the Conversion of A and B Share Securities

Accounts and Related Transactions in the Issuance of A Shares to Absorb and Merge Hangzhou

Turbine Power Group Co. Ltd. by Hangzhou Hirisun Technology Incorporated." disclosed by

HTC on December 20 2025 (Announcement No.: 2025-136) after this share exchange is

completed for the original B-share overseas investors of HTC the proceeds in RMB from

selling Hirisun A-shares or receiving dividends from Hirisun A-shares shall be uniformly

converted into Hong Kong dollars in accordance with relevant regulations and requirements

and the securities company shall through the currency exchange bank finally convert them

into Hong Kong dollars for settlement.To facilitate overseas investors to handle foreign exchange purchase-related business throughtheir custodian securities companies the Industrial and Commercial Bank of China (ICBC) as a

cooperating bank will under the premise of complying with Chinese laws regulations and

relevant foreign exchange rules and requirements assist overseas investors and custodian

securities companies in fund foreign exchange purchases and remittance operations as well as

handle applications inquiries communications and other tasks related to foreign exchange

services. This relevant foreign exchange purchase business has been approved by the competent

authorities. The custodian securities companies where the overseas investors hold their accounts

are requested to promptly contact the ICBC branches at the locations of their headquarters or

offices to handle account opening and related matters. To ensure smooth business operations it is

recommended that the branch for handling the business be one of ICBC’s branch used cooperated

with the securities company that has previously handled foreign exchange payment and receipt

services for overseas investors. If no prior cooperation has been established or if relevant

cooperation has been transferred the branch will be designated by ICBC. The contact information

for ICBC Hangzhou Branch is provided in Attachment 1.According to the information provided by the Industrial and Commercial Bank of China the

simplified operation plan for foreign investors obtaining future dividends from A shares after

exchanging shares as well as the foreign exchange transfer and other procedures for funds

obtained from selling shares in RMB is as follows:

For the original foreign investors of HTC the RMB funds obtained from selling shares or from

dividends of Hirisun A-shares will be exchanged on their behalf by the respective securities

companies and ultimately settled in Hong Kong dollars. Each securities company will open a

dedicated RMB deposit account and sign related agreements with the cooperating bank for this

account transfer for foreign exchange purchases(Industrial and Commercial Bank of China). Every

trading day ICBC will assist in converting the RMB funds into Hong Kong dollars based on the

purchase requests submitted by each securities company and the securities companies will

ultimately transfer the Hong Kong dollar funds to the investors.If overseas investors have questions regarding foreign exchange purchases and fund transfers

they can consult the securities company where their assets are held or they can contact CITIC

Securities. Contact details for CITIC Securities can be found in Attachment 2.Attachment 1

Contact Information for Consulting and Business Transactions at Industrial and Commercial Bank

of China Co. Ltd.Hangzhou BranchContact Person (Chinese):Wang Yang 0571-87043551

Contact Person (English): Weng Xiaoying 0571-85109607

E-mail：365306561@qq.com

Address: No. 90 Qingchun RoadGongshu District Hangzhou City Zhejiang Province

Attachment 2

Contact Information for Consulting and Business Transactions at CITIC Securities Company

Limited Zhejiang Branch

Contact Person (Chinese):Huang Lei 86-0571-85772223

Contact Person (English): Pan Xinchen 86-0571-87995380

E-mail：hql-zj@citics.com

Fax: 86-0571-85166500

Address: 19F Dikai Silver Center No. 29 Jiefang East Road Shangcheng District Hangzhou City

Zhejiang Province

The Board of Directors of Hangzhou Hirisun Technology Incorporated

February 62026