INSIDE INFORMATION - OPERATION BRIEFINGS FOR THE SECOND QUARTER OF 2024

Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited take no responsibility for the contents of this announcement 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 announcement.CGN Power Co. Ltd.*中国广核电力股份有限公司 (A joint stock company incorporated in the People’s Republic of China with limited liability) (Stock Code: 1816) INSIDE INFORMATION OPERATION BRIEFINGS FOR THE SECOND QUARTER OF 2024 This announcement is made by CGN Power Co. Ltd.* (the “Company” together with its subsidiaries collectively the “Group”) pursuant to Rule 13.09 of the Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong Limited and the Inside Information Provisions under Part XIVA of the Securities and Futures Ordinance (Chapter 571 of The Laws of Hong Kong).POWER GENERATION AND ON-GRID POWER GENERATION The board of directors (the “Board”) of the Company announces that based on the statistics of the Company the total power generation of nuclear power generating units operated and managed by the Group from January to June 2024 amounted to approximately 113378.23 GWh representing a year-on-year increase of 0.08%. The total on-grid power generation amounted to approximately 106009.67 GWh representing a year-on-year increase of 0.09%. 1Details of the power generation and on-grid power generation from January to June 2024 are as follows: Power On-grid power Installed generation generation capacity as of (GWh)1 (GWh)1 Name of nuclear power June 30 January to January to Corresponding January to January to Corresponding station 2024 (MW)1 June 2024 June 2023 change (%) June 2024 June 2023 change (%) From subsidiaries 25042 87842.11 88024.67 -0.21 82012.59 82166.06 -0.19 Daya Bay Nuclear Power Station2 1968 5907.57 8674.45 -31.90 5617.98 8306.12 -32.36 Ling’ao Nuclear Power Station3 1980 8268.94 7171.32 15.31 7921.23 6869.99 15.30 Lingdong Nuclear Power Station4 2174 7505.57 8693.01 -13.66 7057.85 8187.59 -13.80 Ningde Nuclear Power Station 4356 16410.70 16709.88 -1.79 15393.80 15673.88 -1.79 Yangjiang Nuclear Power Station 6516 25977.30 26928.97 -3.53 24447.56 25337.85 -3.51 Fangchenggang Nuclear Power Station5 4548 13093.45 12001.96 9.09 11596.59 10465.32 10.81 Taishan Nuclear Power Station6 3500 10678.57 7845.07 36.12 9977.60 7325.31 36.21 From associate Hongyanhe Nuclear Power Station 6714 25536.12 25267.17 1.06 23997.08 23752.00 1.03 Total of subsidiaries and associate1 31756 113378.23 113291.84 0.08 106009.67 105918.06 0.09 Notes: 1. Figures in this announcement have been rounded to the nearest whole number. 2. Daya Bay Nuclear Power Station carried out a refuelling outage from January to June 2024. No refuelling outage was carried out for the corresponding period in 2023. 3. Ling’ao Nuclear Power Station did not carry out refuelling outage from January to June 2024. A refuelling outage was carried out for the corresponding period in 2023. 4. The duration of the refuelling outages at Lingdong Nuclear Power Station from January to June 2024 was longer than the corresponding period in 2023. 5. Fangchenggang Unit 3 was put into commercial operation on March 25 2023 and Unit 4 was qualified for commercial operation on May 25 2024. 6. The duration of the refuelling outages at Taishan Nuclear Power Station from January to June 2024 was shorter than the corresponding period in 2023. 2This announcement also contains a brief operation review of the Company for the second quarter of 2024 as follows: STATUS OF OPERATION Units in operation Fangchenggang Unit 4 was qualified for commercial operation on May 25 2024.In the second quarter of 2024 the Group completed as scheduled one annual refuelling outage two ten-year outages and one initial outage and conducted two new annual refuelling outages.As at June 30 2024 the Group has completed as scheduled five annual refuelling outages (including an annual refuelling outage conducted over to the next year) four ten-year outages (including a ten-year outage conducted over to the next year) and an initial outage.In the third quarter of 2024 in addition to continuing the refuelling outages for units which had commenced the Group plans to conduct four new annual refuelling outages and one ten-year outage.Units under construction On April 29 2024 Lufeng Unit 5 completed its dome lifting work and entered the equipment installation phase.As at June 30 2024 the Group manages a total of 10 nuclear power generating units which have been approved for FCD and are under construction (including 6 units which were entrusted to the Company by the controlling shareholder of the Company for management) among which one was in the commissioning phase four were in the equipment installation phase one was in the civil construction phase and four were in the FCD preparation phase. Progress of construction for the units under construction is detailed in the table below: Expected FCD Civil Equipment Grid Time of Nuclear Power Preparation Construction Installation Commissioning Connection Commencement Generating Units Phase Phase Phase Phase Phase of Operation From subsidiaries Lufeng Unit 5 3 2027 Lufeng Unit 6 3 2028 From associates Ningde Unit 5 3 – Ningde Unit 6 3 – From companies which were entrusted by the controlling shareholder for management Huizhou Unit 1 3 2025 Huizhou Unit 2 3 2026 Huizhou Unit 3 3 – Huizhou Unit 4 3 – Cangnan Unit 1 3 2026 Cangnan Unit 2 3 2027 Note: FCD refers to the First Concrete Day of the main plant of the nuclear reactor. 3MISCELLANEOUS On May 29 2024 the resolution on payment of the 2023 final dividend in cash and other resolutions were considered and approved at the Company's 2023 annual general meeting. The dividend is expected to be paid on July 10 2024. For details please refer to the circular of the Company dated April 11 2024 and the announcement of the Company dated May 29 2024.On June 21 2024 the Board considered and approved the resolution on the Issuance of A Share Convertible Corporate Bonds by the Company to non-specific investors. According to the requirements of relevant laws regulations and regulatory documents and based on the financial position and investment plans of the Company the total amount of proceeds raised from the proposed Issuance of A Share Convertible Corporate Bonds will not exceed RMB4.9 billion (RMB4.9 billion inclusive) and the net proceeds after deducting issuance expenses are intended to be used for Unit 5 and Unit 6 of Lufeng nuclear power plants in Guangdong Province. The effectiveness and completion of matters relating to the Issuance of A Share Convertible Corporate Bonds to non-specific investors shall be subject to the considerations and approvals of the shareholders' general meeting and the class meeting of the Company the approval of the Shenzhen Stock Exchange and the approval of registration by the China Securities Regulatory Commission.For details please refer to the relevant announcement of the Company dated June 21 2024.Shareholders and potential investors of the Company are reminded that the above information only represents the operational performance of the nuclear power stations of the Group and is not a basis of reference or calculation of the revenue or profit generated or derived by the Group for the six months ended June 30 2024. Accordingly shareholders and potential investors of the Company are advised to exercise caution when dealing in the shares of the Company.By order of the Board CGN Power Co. Ltd.* Yin Engang Chief Financial Officer Joint Company Secretary and Board Secretary The PRC July 8 2024 As at the date of this announcement the Board of the Company comprises Mr. Gao Ligang as an executive Director; Mr. Yang Changli Ms. Li Li Mr. Pang Songtao Mr. Feng Jian and Mr. Liu Huanbing as non-executive Directors; Mr. Wong Ming Fung Mr. Li Fuyou and Ms. Xu Hua as independent non-executive Directors.* For identification purpose only 4