RE-ELECTION OF EMPLOYEE REPRESENTATIVE SUPERVISORS

B_table indent_3.5 mm N_table indent_3 mm 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.四川能投发展股份有限公司 Sichuan Energy Investment Development Co. Ltd.* (a joint stock company incorporated in the People’s Republic of China with limited liability) (Stock Code: 01713) RE-ELECTION OF EMPLOYEE REPRESENTATIVE SUPERVISORS The board (the “Board”) of directors (the “Director(s)”) of Sichuan Energy Investment Development Co. Ltd.* (the “Company”) hereby announces the term of office of Mr. Su Lijiang (苏理江 ) (“Mr. Su”) and Ms. Tian Wenwei (田文薇 ) (“Ms. Tian”) as the employee representative supervisors (the “Employee Representative Supervisor”) of the Company is about to expire. Based on the poll results of the staff representative meeting of the Company on 4 July 2024 Mr. Su and Ms. Tian were re-elected as the Employee Representative Supervisors of the Company and will form the fifth session of supervisory committee of the Company (the “Supervisory Committee”) together with the non-employee representative supervisors elected by the forthcoming extraordinary general meeting (the “EGM”) with a term of three years commencing from the date of EGM to the date of expiry of the term of office of the fifth session of the board of supervisors of the Company. The biographical details of Mr. Su and Ms. Tian are set out as below: Mr. Su Lijiang (苏理江 ) aged 42 graduated from (i) the Central Radio and TV University (中央广播 电视大学 ) (now known as the Open University of China (国家开放大学 )) with a diploma degree in administrative management in July 2006; and (ii) the China West Normal University (西华师范大学 ) in the PRC with a bachelor’s degree majoring in law in June 2007.– 1 –B_table indent_3.5 mm N_table indent_3 mm Mr. Su joined the Company in December 2023 and has been serving as the head of the Discipline Inspection and Supervision Department and the office director of the Discipline Inspection Committee of the Company since then. Additionally he has been serving as the Employee Representative Supervisor of the Company since January 2024.Prior to joining the Company Mr. Su worked at Yibin Housing Provident Fund Center (宜宾市住房公积金中心 ) between December 2007 and August 2012. Between August 2012 and April 2015 Mr. Su served in Gaochang Town Yibin City (宜宾市高场镇 ) where his last held positions were the party committee member deputy mayor and the military chief. Between April 2015 and November 2015 Mr. Su served in various positions in Gubai Town (古柏镇 previously known as Bubai Xiang (古柏乡 )) Yibin City including the Chairman of the People’s Congress of Gubai Town the deputy secretary of Party Committee the secretary of the Discipline Inspection Committee the Chairman of the Trade Union and the first secretary of the Hongmiao Poverty-stricken Village. Subsequently between November 2015 and February 2017 Mr. Su served in the Yibin Food and Drug Administration (宜宾市食品药品监督管理局 ) where he served as the chief of Integrated Coordination Section.Between February 2017 and June 2017 Mr. Su served as the office director of Yibin Municipal Bureau of Investment Promotion (宜宾市投资促进局 ). Afterwards between June 2017 and April 2019 Mr. Su served as the office director and the secretary of the Second Party Branch of Yibin Municipal Bureau of Investment Promotion and Foreign Affairs and Overseas Chinese Affairs (宜宾市投资促进和外事侨 务局 ). Between April 2019 and January 2022 Mr. Su served as a number of positions in Yibin Municipal Bureau of Economic Cooperation and Foreign Affairs (宜宾市经济合作和外事局 ) including office director the secretary of the Second Party Branch of the Bureau the full-time deputy secretary of the Party Committee of the Bureau and his last held positions were the chief of the Integrated Projects Section and a chief clerk Class I. Subsequently between January 2022 and October 2022 Mr. Su served as the head of the High-end Equipment Manufacturing Section (Rail Transit Industry Section) and the first-class chief clerk of Yibin Municipal Bureau of Economic Cooperation and Emerging Industries (宜宾市经 济合作和新兴产业局 ). Between October 2022 and November 2023 Mr. Su served as the head of the Equipment Manufacturing Industry Section (Municipal Radio Management Office) and the first-class chief clerk of Yibin Municipal Bureau of Economy and Information Technology (宜宾市经济和信息化局 ).Ms. Tian Wenwei (田文薇 ) aged 32 graduated from (i) the Southwest Petroleum University (西南石 油大学 ) in the PRC with a bachelor’s degree majoring in accounting in June 2014; and (ii) the University of Electronic Science and Technology of China (电子科技大学 ) with a master degree in international business administration in March 2021.Ms. Tian joined the Company in April 2016 and has served in the audit department since then.Concurrently Ms. Tian has also (i) served as the member of the Organizing Committee of the Youth League Branch of the Company between June 2018 and May 2021; (ii) served in the M&A working group of the Company between February 2019 and June 2019; (iii) served as the deputy secretary of the Youth League Committee and the secretary of the Youth League Branch of the Company between June 2021 and June 2023; (iv) served as the secretary of the Youth League Committee of the Company since June 2023; and (v) served as the Employee Representative Supervisor of the Company since January 2024. Prior to joining the Company Ms. Tian served in the financial assets department of Sichuan Energy Investment Development Group Co. Ltd* (四川能投电力开发集团有限公司 ) between August 2014 and March 2016. The respective services contracts entered into by the Company with Mr. Su and Ms. Tian will continue to be effective while they are not receive any Supervisor’s remuneration for his/her service as an Employee Representative Supervisor.– 2 –B_table indent_3.5 mm N_table indent_3 mm To the best knowledge of the Board and the Supervisory Committee saved as disclosed above Mr. Su and Ms. Tian (i) do not hold any other positions in the Company or any of its subsidiaries or hold any directorships in any other listed companies in the last three years; (ii) do not have any relationship with any Directors supervisors senior management or substantial shareholders of the Company; and (iii) do not have and are not deemed to have any interest or short positions in the shares underlying shares or debentures of the Company or any of its associated corporation within the meaning of Part XV of the Securities and Futures Ordinance Chapter 571 of the Laws of Hong Kong.As the date of this announcement save as disclosed above the Board is not aware of any other matters in relation to the appointments of Mr. Su and Ms. Tian that need to be brought to the attention of the Shareholders or any information that need to be disclosed pursuant to the requirement of Rules 13.51(2)(h) to (v) of the Listing Rules.By order of the Board Sichuan Energy Investment Development Co. Ltd.* He Jing Chairman Chengdu Sichuan Province the PRC 4 July 2024 As at the date of this announcement the executive Directors are Mr. He Jing Mr. Wang Yuanchun and Ms. Xie Peixi; the non-executive Directors are Ms. Han Chunhong Mr. Tao Xueqing Ms. Liang Hong Ms. Lv Yan and Mr. Kong Ce; and the independent non-executive Directors are Mr. Kin Kwong Kwok Gary Ms. He Zhen Mr. Wang Peng Prof. Li Jian and Ms. He Yin.* for identification purposes only –3–