Stock Code: 200771 Stock ID: Hangqilun B Announcement No. :2023-20 Hangzhou Steam Turbine Power Group Co., Ltd. Announcement on Extending the Auditing Services of Pan-China CPA to Year 2023 The members of the Board and the Company acknowledge being responsible for the truthfulness, accuracy, and completeness of the announcement. Not any false record, misleading statement or significant omission carried in this announcement. Pan-China Certified Public Accountants is an accounting firm with securities and futures-related business qualifications. It has many years of experience in providing audit services to listed companies and has sufficient independence, professional competence and investor protection capabilities. In the process of engaging in the company's 2022 annual audit service, they can fulfill their duties and follow the practice standards. The audit report issued can fully reflect the company's 2022 annual financial situation and operating results, and the audit results issued conform to the actual situation of the company. The audit staff it is equipped with has the ability to complete the audit work, complete the audit work according to the annual audit plan, and meet the company's annual financial audit requirements. In order to maintain the continuity of the company's audit work, the company plans to continue to employ Pan-China Certified Public Accountants as the company's audit institution in 2022 for annual financial report and internal control, with an employment period of one year. The relevant audit fees for 2023 and internal control audit are RMB 1.3 million respectively; Internal control audit cost is RMB300,000, the fees are the same as in 2022 The basic information of Pan-China Certified Public Accountants is as follows: I. Institutional information 1. Basic information Name of firm Pan-China Certified Public Accountants (Special General Partnership) Date of July 18, 2011 Organizational Special General establishment form Partnership Registered address No.128, Xixi Road,Lingyin Street, Xihu District, Hangzhou City, Zhejiang Chief partner Hu Shaoxian Number of partners at the end 225 persons Number of Certified public accountant 2,064 persons 1/5 practitioners at the Who have signed the audit report of securities service business 780 persons end of the last year Total business 3.501 billion yuan income 2021 business Audit business 3.178 billion yuan revenue income Securities business 1.901 billion yuan income Number of 612 customers Total audit fees 632 million yuan Manufacturing, information transmission, software and information technology service industry, wholesale and retail Audit of listed industry, real estate industry, construction industry, electricity, companies (including heat, gas and water production and supply industry, financial industry, transportation, storage and postal industry, political, Industries mainly A and B shares) in culture, sports and entertainment industry, leasing and business 2022 involved service industry, water conservancy, environment and public facilities management industry, scientific research and technical service industry, agriculture, forestry, animal husbandry, fishery, mining industry, accommodation and catering industry, education, general, etc. Audit clients of listed companies in the same industry by the 458 firm 2. Investor protection capabilities At the end of last year, Pan-China Certified Public Accountants (Special General Partnership) had accrued a total of more than 100 million yuan in the occupational risk fund, and the cumulative compensation limit for the purchased occupational insurance exceeded 100 million yuan. The accrual of the occupational risk fund and the purchase of occupational insurance comply with the Ministry of Finance’s relevant provisions in the "Administrative Measures for Professional Risk Funds of Accounting Firms" and other documents. Bearing civil liability in civil litigations related to practice conduct in the past three years: Suitor (Claimant for Respondent (To be Litigation (arbitration) Amount of litigation Outcome of litigation Arbitration) arbitrated) events (arbitration). (arbitration). The first instance ruled that Pan-China Some cases are in the Yatai Pharmaceutical, Certified Public pre-litigation mediation Investors Tianjian, Essence Annual report Accountants (Special stage and are not Securities General Partnership) counted is jointly and severally liable 2/5 within 5% of the investors’ losses, and the occupational insurance insured by Pan-China Certified Public Accountants (Special General Partnership) is sufficient to cover the amount of compensation The case has not yet been tried, and the occupational insurance insured by LAWTON Pan-China Certified Investors DEVELOPMENT, Annual report Not counted Public Accountants Tianjian (Special General Partnership) is sufficient to cover the amount of compensation The case has not yet been tried, and the occupational insurance insured by Pan-China Certified Donghai Investors Annual report Not counted Public Accountants Securities,HEAG (Special General Partnership) is sufficient to cover the amount of compensation The case has not yet Pan-China Certified been tried, and the Public Accountants occupational (Special General insurance insured by Partnership), Pan-China Certified Borunte Robot Co., Pan-China Certified Annual report Not counted Public Accountants Ltd Public Accountants (Special General (Special General Partnership) is Partnership) sufficient to cover the Guangdong Branch amount of compensation 3/5 3. Independence and integrity record In the past three years (From January 1, 2020 to December 31, 2022), Pan-China Certified Public Accountants (Special General Partnership) has received one administrative penalty, 13 supervision and management measures, and one self-regulatory measure for its professional conduct, and has not received criminal penalties or disciplinary sanctions. In the past three years, its practitioners have received 3 administrative punishments, 31 supervision and management measures, 2 self-regulatory measures, and 3 disciplinary sanctions for their professional conduct, and have not received criminal punishments, involving a total of 39 people. II. Project information 1. Personnel information Information about the signing or When start When start When start review of When providing Project team members Name auditing listed practicing in audit reports become CPA audit services companies the firm of listed for the firm companies in the past three years Sheng Project partner 2003 2001 2003 2019 Weiming [Note1] Sheng 2003 2001 2003 2019 CPA with power to Weiming sign Lin 2013 2008 2013 2022 No Qunhui Quality control [Note2] reviewer [Note 1] In 2022, signed the 2021 annual audit report of listed companies such as Hangzhou Steam Turbine, Longma Environmental Sanitation and Kelin Power ; In 2021, signed the 2020 annual audit report of listed companies such as Hangzhou Steam Turbine and Longma Environmental stanitation ; in 2020, signed the 2019 annual audit of listed companies such as Hangzhou Steam Turbine . [Note 2] As Pan-China Certified Public Accountants is carrying out the independent rotation of project quality reviewers, it is currently impossible to determine the quality reviewers of the 4/5 Company's audit project in 2023. The Company will disclose relevant personnel information in a timely manner after Pan-China Certified Public Accountants determines the project quality reviewer. 2. Integrity record In the past three years, project partners, certified public accountants with power to sign, and project quality control reviewers have not received criminal penalties for their practice, and have not been subject to administrative penalties and supervisory measures by the China Securities Regulatory Commission and its dispatched agencies and the industry authorities, nor subject to the situation of self-regulatory measures and disciplinary sanctions from stock exchange and self-regulatory organizations such as industry associations. 3. Independence Pan-China Certified Public Accountants (Special General Partnership) and project partners, certified public accountants with power to sign, and project quality control reviewers have no circumstances that may affect independence. 4. Audit fee pricing principles The 2023 audit fee is RMB 1.3 million, and the internal control audit fee is RMB 300,000. The pricing principles for 2023 audit fees and internal control audit fees are mainly based on the Company’s business scale, industry, and accounting processing complexity, etc., and are according to the Company's annual report auditing needs of the auditors and workload and the firm's fee standards, and upon referring to the audit fees paid by the Company in previous years, it’s finally determined by both parties by consult. The Board of Directors of Hangzhou Steam Turbine Power Group Co., Ltd. March 29,2023 5/5