Stock Code: 200771 Stock ID: Hangqilun B Announcement No.: 2023-33 Hangzhou Steam Turbine Power Group Co., Ltd. Supplementary Announcement on the Contents of the Simplified Report of Change in Equity of the Transferee of Share Transfer 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. Hangzhou Steam Turbine Holdings Co., Ltd. (hereinafter referred to as " Steam Turbine Holding"), the controlling shareholder of Hangzhou Steam Turbine Power Group Co., Ltd. (hereinafter referred to as "the Company"), and Hangzhou Qitong Equity Investment Partnership (limited partnership) (hereinafter referred to as "Hangzhou Qitong") signed a conditionally effective Share Transfer Agreement on April 3, 2023, and Hangzhou Qitong acquired 49,008,999 unlisted circulating shares of the Company held by Turbine Holding through the agreement by public solicitation and transfer (accounting for 5% of the total share capital of the Company). For details, please refer to the Announcement on the progress of the transfer of the Company's shares by the controlling shareholder through the public solicitation transfer agreement namely the signing of the share transfer agreement (Announcement No.: 2023-32) and the Simplified Report of Change in Equity (Hangzhou Qitong) and Simplified Report of Change in Equity (Turbine Holdings) published by the Company on CNINF (www.cninfo.com.cn) on April 4, 2023. The Company has additionally disclosed the following contents in the simplified report of change in equity of the Transferee of the share transfer of the controlling shareholder: I.Ownership structure of information disclosure obligor As of the signing date of the simplified report of change in equity, the capital contribution structure of Hangzhou Qitong is as follows: Amount of Partner Ratio of S/N Partner name contribution (RMB nature contribution '0,000) 1 Comprehensive Reform Experiment General 1 (Hangzhou) Enterprise Management 100 0.1% partner Co., Ltd. Hangzhou Weitong Equity Investment Limited 2 100,000 99.9% Partnership (Limited Partnership) partner Total 100,100 100% As of the signing date of the simplified report of change in equity, the basic information of Hangzhou Weitong Equity Investment Partnership (Limited Partnership), the limited partner of Hangzhou Qitong, is as follows: Enterprise Hangzhou Weitong Equity Investment Partnership (Limited Partnership) name Main business Room 122 -32, No.26 Baiyun Road, Shangcheng District, Hangzhou City, Zhejiang premises Province Executive Comprehensive Reform Experiment (Hangzhou) Enterprise Management Co., Ltd partner Contribution RMB 1,506 million amount Unified social 91330102MA2KF663X5 credit code Enterprise type Limited partnership General items: equity investment (except for the items subject to approval according Main business to law, for which business activities shall be carried out independently according to scope law as per business license). Term of April 6, 2021 to no fixed term partnership Communication 13185016823 method Comprehensive Reform Experiment (Hangzhou) Equity Investment Fund Partnership (Limited Partnership) holds 99.6% of the property Partner Comprehensive Reform Experiment(Hangzhou) Enterprise Management Co., Ltd. situation holds 0.07% of the property Comprehensive Reform Experiment (Hangzhou) Enterprise Management Partnership (Limited Partnership) holds 0.33% of the property As of the signing date of the simplified report of change in equity, the basic information of Hangzhou Qitong's general partner Comprehensive Reform Experiment (Hangzhou) Enterprise Management Co., Ltd. is as follows: 2 Enterprise Comprehensive Reform Experiment (Hangzhou) Enterprise Management Co., Ltd name Registered Room 101-1-77, Building 21, No.1399 Liangmu Road, Cangqian Street, Yuhang address District, Hangzhou City, Zhejiang Province Legal Dai Yusi representative Registered RMB 10 million capital Unified social 91330110MA2KK0C47A credit code Enterprise type Other limited liability company General items: business management; business management consulting (except for Main business the items subject to approval according to law, for which business activities shall be scope carried out independently according to law as per business license). Operating August 24, 2021 to August 23, 2031 period Communication 13185016823 method Guoxin Guotong (Hangzhou) Equity Investment Co., Ltd. holds 49% of equity Comprehensive Reform Experiment(Hangzhou) Enterprise Management Partnership (Limited Partnership) holds 21% of equity Hangzhou Yuhang Venture Capital Investment Management Co., Ltd. holds 7.5% of Shareholder equity information Hangzhou Industrial Investment Co., Ltd. holds 7.5% of equity Zhejiang Jinkong Investment Management Co., Ltd. holds 7.5% of equity Zhejiang Zhongda Group Investment Co.,Ltd. holds 3.75% of equit Hang Zhou Iron & Steel Co.,Ltd. holds 3.75% of equity 2.Property right control relationship As of the signing date of the simplified report of change in equity, the property right control relationship diagram of Hangzhou Qitong is as follows: 3 国务院国资委 100% 中国国新控股有限责任公司 李 王 亚 少 100% 南 龙 中国国新基金管理有限公司 50% 50% 100% 国新国同(杭州)股权投资 王少龙等9位 杭州博同企业 有限公司 自然人 管理有限公司 (备案号:P1070382) 90% 10% 49% 综改试验(杭州)股权投资基金 综改春华(杭州)企业管理合伙企业 综改试验(杭州)企业管理有限公司 合伙企业(有限合伙) (有限合伙) 备案号:STJ355 0.07% 99.60% 0.33% 杭州微同股权投资合伙企业 (有限合伙) 备案号:SQV408 0.1% 99.90% 杭州启同股权投资合伙企业 (有限合伙) 备案号:SXW893 3.Actual controller information of Hangzhou Qitong Hangzhou Qitong is a limited partnership, in which Comprehensive Reform Experiment (Hangzhou) Enterprise Management Co., Ltd. is the general partner and Hangzhou Weitong Equity Investment Partnership (Limited Partnership) is the limited partner. The Partnership Agreement of Hangzhou Qitong Equity Investment Partnership (limited partnership) stipulates the authority of the general partner and the limited partner: "All partners unanimously agree that the general partner, as the executive partner of the partnership, is entitled to all the rights of management, control, operation and decision-making of the partnership affairs stipulated in the Partnership Law and this agreement within the scope stipulated in this agreement and relevant laws and regulations, and these rights shall be exercised by the executive partner." Therefore, as the general partner of Hangzhou Qitong, Comprehensive Reform Experiment (Hangzhou) Enterprise Management Co., Ltd. carries out partnership affairs on behalf of the partnership, and has the executive power over the daily operation of Hangzhou Qitong, thus forming control over Hangzhou Qitong. As of the signing date of the simplified report of change in equity, the shareholding structure of Comprehensive Reform Experiment (Hangzhou) Enterprise Management Co., Ltd. is as follows: Amount of S/N Shareholder name Equity ratio contribution (RMB 4 '0,000) Guoxin Guotong (Hangzhou) Equity Investment 1 490 49% Co., Ltd. Comprehensive Reform Experiment(Hangzhou) 2 Enterprise Management Partnership (Limited 210 21% Partnership) Hangzhou Yuhang Venture Capital Investment 3 75 7.5% Management Co., Ltd. 4 Hangzhou Industrial Investment Co., Ltd. 75 7.5% Zhejiang Jinkong Investment Management Co., 7.5% 5 75 Ltd. 6 Zhejiang Zhongda Group Investment Co.,Ltd. 37.5 3.75% 7 Hang Zhou Iron & Steel Co., Ltd. 37.5 3.75% Total 1,000 100% Guoxin Guotong (Hangzhou) Equity Investment Co., Ltd holds 49% of the shares of Comprehensive Reform Experiment (Hangzhou) Enterprise Management Co., Ltd., which is the largest shareholder. Guoxin Guotong (Hangzhou) Equity Investment Co., Ltd. appoints three directors (accounting for 3/5) and the chairman to Comprehensive Reform Experiment (Hangzhou) Enterprise Management Co., Ltd., and thus Guoxin Guotong (Hangzhou) Equity Investment Co., Ltd. forms control over Comprehensive Reform Test (Hangzhou) Business Management Co., Ltd. The shareholders of Guoxin Guotong (Hangzhou) Equity Investment Co., Ltd. are China Reform Fund Management Co., Ltd., China Guoxin Holdings Co., Ltd. and the State Council State-owned Assets Supervision and Administration Commission (SASAC) in turn, and their shareholding ratio is 100% (see the property rights control relationship above for details). Therefore, the State Council SASAC is the actual controller of Hangzhou Qitong. 4.Main fund sources of Hangzhou Qitong The main funds of Hangzhou Qitong come from the contribution of the Comprehensive Reform Experiment (Hangzhou) Equity Investment Fund Partnership (Limited Partnership) (Fund Record No.: STJ355). As of the signing date of the simplified report of change in equity, the capital contribution structure of the Comprehensive Reform Experiment (Hangzhou) Equity Investment Fund Partnership Enterprise (Limited Partnership) is as follows: Partner Amount of Ratio of S/N Partner name nature contributio contribution 5 n (RMB '000 million) Beijing Guoxin Comprehensive Reform Limited 1 Investment Partnership (Limited 10 19.96% partner Partnership) Limited 2 Zhejiang Industry Fund Co., Ltd. 10 19.96% partner Hangzhou Industrial Investment Co., Limited 3 10 19.96% Ltd. partner Hangzhou Comprehensive Reform Limited 4 Yuxin Enterprise Management 10 19.96% partner Partnership (Limited Partnership) Zhejiang Zhongda Group Investment Limited 5 5 9.98% Co.,Ltd. partner Limited 6 Hang Zhou Iron & Steel Co., Ltd. 5 9.98% partner Comprehensive Reform Experiment General 7 (Hangzhou) Enterprise Management 0.1 0.20% partner Co., Ltd Total 50.1 100% The penetrating equity of Comprehensive Reform Experiment (Hangzhou) Equity Investment Fund Partnership (Limited Partnership) (Fund Record No.: STJ355) is as follows: Ratio of Amount of contrib contributio S/N Organization name Investor name ution n (RMB (%) '0,000) Beijing Guoxin Comprehensive China Guoxin Holdings Co., Ltd. 99.99% 999,900 1 Reform Investment Partnership Guoxin Comprehensive Reform 0.01% 100 (Limited Partnership) Business Management Co., Ltd 1.1 China Guoxin Holdings Co., Ltd. State Council SASAC 100% 1,550,000 Guoxin Comprehensive Reform China Reform Fund Management Co., 1.2 100% 5,000 Business Management Co., Ltd Ltd. China Reform Fund Management Co., 1.2.1 China Guoxin Holdings Co., Ltd. 100% 65,000 Ltd. Zhejiang Financial Holding Co., Ltd 97.50% 1,950,000 2 Zhejiang Industry Fund Co., Ltd. Zhejiang Innovation Development 2.50% 50,000 Investment Co., Ltd. Zhejiang Provincial Department of 2.1 Zhejiang Financial Holding Co., Ltd 100% 1,200,000 Finance Zhejiang Innovation Development 2.2 Zhejiang Financial Holding Co., Ltd 100% 30,000 Investment Co., Ltd. 6 Hangzhou Industrial Investment Co., Hangzhou State-owned Capital 3 100% 1,000,000 Ltd. Investment and Operation Co., Ltd. State-owned Assets Supervision and Hangzhou State-owned Capital Administration Commission of 3.1 100% 1,000,000 Investment and Operation Co., Ltd. Hangzhou Municipal People's Government Hangzhou Yuhang Industry Fund Co., 49.90% 49,900 Ltd. Zhejiang Dream Town Investment Hangzhou Comprehensive Reform 30.00% 30,000 Development Co., Ltd. 4 Yuxin Enterprise Management Hangzhou Liangzhu Cultural City Partnership (Limited Partnership) 20.00% 20,000 Group Co., Ltd. Hangzhou Yuhang Venture Capital 0.10% 100 Investment Management Co., Ltd. Hangzhou Yuhang Industry Fund Co., Hangzhou State-owned Capital 4.1 100% 480,000 Ltd. Investment and Operation Co., Ltd Hangzhou Yuhang District Bureau of Finance (State-owned Assets Supervision and Administration Office 85% 850,000 Hangzhou State-owned Capital 4.1.1 of Hangzhou Yuhang District People's Investment and Operation Co., Ltd Government) Hangzhou Yuhang Financial 15% 150,000 Development Co., Ltd Hangzhou Yuhang Urban Zhejiang Dream Town Investment 4.2 Development Investment Group Co., 100% 65,000 Development Co., Ltd. Ltd. Hangzhou Yuhang District Bureau of Finance (State-owned Assets Hangzhou Yuhang Urban Supervision and Administration Office 90% 18,000 4.2.1 Development Investment Group Co., of Hangzhou Yuhang District People's Ltd. Government) Zhejiang Financial Development Co., 10% 2,000 Ltd Zhejiang Financial Development Co., 10% 7,000 Hangzhou Liangzhu Cultural City Ltd 4.3 Group Co., Ltd. Hangzhou State-owned Capital 90% 63,000 Investment and Operation Co., Ltd Zhejiang Financial Development Co., Zhejiang Provincial Department of 4.3.1 100% 500,000 Ltd Finance Hangzhou Yuhang District Bureau of Finance (State-owned Assets Hangzhou State-owned Capital 4.3.2 Supervision and Administration Office 85% 850,000 Investment and Operation Co., Ltd of Hangzhou Yuhang District People's Government) 7 Hangzhou Yuhang Financial 15% 150,000 Development Co., Ltd Hangzhou Yuhang Venture Capital Hangzhou State-owned Capital 4.4 100% 2,000 Investment Management Co., Ltd. Investment and Operation Co., Ltd Hangzhou Yuhang District Bureau of Finance (State-owned Assets Supervision and Administration Office 85% 850,000 Hangzhou State-owned Capital 4.4.1 of Hangzhou Yuhang District People's Investment and Operation Co., Ltd Government) Hangzhou Yuhang Financial 15% 150,000 Development Co., Ltd Zhejiang Zhongda Group Investment Zhejiang Zhongda Group Investment 5 100% 100,000 Co.,Ltd. Co.,Ltd. (600704.SH) Hang Zhou Iron & Steel Co., Ltd. 6 / / / (600126.SH) Guoxin Guotong (Hangzhou) Equity 49% 490 Investment Co., Ltd. Comprehensive Reform Test (Hangzhou) Business Management 21% 210 Partnership (Limited Partnership) Hangzhou Yuhang Venture Capital 7.50% 75 Investment Management Co., Ltd. Comprehensive Reform Experiment Hangzhou Industrial Investment Co., 7 (Hangzhou) Enterprise Management 7.50% 75 Ltd. Co., Ltd Zhejiang Jinkong Investment 7.50% 75 Management Co., Ltd. Zhejiang Zhongda Group Investment 3.75% 37.5 Co.,Ltd. Hang Zhou Iron & Steel Co., Ltd. 3.75% 37.5 (600126.SH) Guoxin Guotong (Hangzhou) Equity China Reform Fund Management Co., 7.1 100% 5,000 Investment Co., Ltd. Ltd. China Reform Fund Management Co., 7.1.1 100% 65,000 Ltd. hina Guoxin Holdings Co., Ltd. Hangzhou Botong Business 10% 100 Management Co., Ltd. 各 Comprehensive Reform Test 10%,共 Wang Shaolong, Liu Jingquan, Wu 7.2 (Hangzhou) Business Management 90% Zhe, Guo Xiaoyu, Li Yanan, Li Partnership (Limited Partnership) 10% 900 Weishu, Liu Wei, Qu Fucheng and Hou each, Yue, totally 9 people. totally 90% Hangzhou Botong Business Wang Shaolong 50% 50 7.2.1 Management Co., Ltd. Li Yanan 50% 50 8 Hangzhou Yuhang Venture Capital Investment Management Co., Ltd., Hangzhou Industrial Investment Co., 7.3-7. Ltd., Zhejiang Jinkong Investment As disclosed above / / 7 Management Co., Ltd., Zhejiang Zhongda Group Investment Co.,Ltd. and Hang Zhou Iron & Steel Co., Ltd. The updated simplified report of change in equity of Hangzhou Qitong was published on CNINF (www.cninfo.com.cn) on the same day as this announcement. The Company will pay close attention to the progress of this public solicitation and transfer, and fulfill its information disclosure obligations in a timely manner in accordance with relevant regulations. Investors are advised to make careful decisions and note the investment risks. This announcement is hereby made. The Board of Directors of Hangzhou Steam Turbine Power Group Co., Ltd. April 13,2023 9