Sinopec Engineering Group Co Ltd. — Capital/Financing Update 2023

Oct 19, 2023

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.

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中石化煉化工程（集團）股份有限公司 SINOPEC Engineering (Group) Co., Ltd.* (a joint stock limited liability company incorporated in the People’s Republic of China)

(Stock Code: 2386)

VOLUNTARY ANNOUNCEMENT PROGRESS OF H SHARE REPURCHASE

References are made to the circular dated 19 March 2023 and the announcement dated 20 August 2023 (the “ Relevant Announcement ”) of SINOPEC Engineering (Group) Co., Ltd. (the “ Company ”) in relation to the H Share Repurchase of the Company. Unless the context otherwise requires, terms used in this announcement shall have the same meanings as defined in the Relevant Announcement.

On 18 August 2023, the resolution on the implementation plan for share repurchase (the “ Relevant Resolution ”) was considered and approved at the thirteenth meeting of the fourth session of the board of directors of the Company (the “ Board ”). Pursuant to the Repurchase Mandate and the Relevant Resolution, the Company conducted the first H Share Repurchase on 19 October 2023 to repurchase 443,000 H shares on The Stock Exchange of Hong Kong Limited at the range of highest and lowest prices of HK$3.66 and HK$3.56 per share, respectively (the “ First H Share Repurchase ”). The total payment of the First H Share Repurchase amounted to HK$1,588,819.5. The repurchased H shares represent approximately 0.03% of the number of issued H shares of the Company prior to the First H Share Repurchase and approximately 0.01% of the total number of issued shares of the Company.

The Company will complete the procedure for the cancellation of the relevant H shares in a timely manner in accordance with requirements of the Articles of Association of SINOPEC Engineering (Group) Co., Ltd. (H Share) (as amended from time to time).

The Company is in a sound financial condition. The Board believes that the H Share Repurchase is in the interests of the Company and its Shareholders as a whole.

• For identification purpose only

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Shareholders and investors should note that any further H Share Repurchase by the Company will be subject to market conditions. There is no guarantee as to the timing, volume or price of any H Share Repurchase, or whether the Company will make any further repurchases. Therefore, Shareholders and investors are advised to exercise caution when dealing in the shares.

By Order of the Board SINOPEC ENGINEERING (GROUP) CO., LTD. JIA Yiqun Chief Financial Officer, Secretary of the Board and Company Secretary

Beijing, the PRC 19 October 2023

As at the date of this announcement, directors of the Company are: JIANG Dejun[#] , XIANG Wenwu[#] , LI Chengfeng*, WU Wenxin*, ZHANG Xinming[#] , XIE Yanli[#] , HUI Chiu Chung, Stephen[+] , DUAN Xue[+] and YE Zheng[+] .

• # Executive Directors

• Non-executive Directors

• + Independent non-executive Directors

This announcement is available on the website of Hong Kong Exchanges and Clearing Limited (www.hkexnews.hk ) and on the website of the Company (www.segroup.cn).

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