Sinopec Engineering Group Co Ltd. — Board/Management Information 2026

May 11, 2026

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.

中国石化 SINOPEC

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)

RESIGNATION OF A DIRECTOR

The board of directors (the "Board") of SINOPEC Engineering (Group) Co., Ltd. (the "Company") hereby announces that, due to his age, Mr. JIANG Dejun has submitted his resignation to the Board as the Chairman of the Board, executive director, as well as the chairman of the nomination committee, strategy and development committee and ESG committee of the Board, effective on the date of the publication of this announcement.

Mr. JIANG Dejun has confirmed that he has no disagreement with the Board and there are no other matters relating to his resignation that need to be brought to the attention of the shareholders of the Company.

During his tenure as the Chairman of the Board, Mr. JIANG Dejun devoted tremendous efforts and wisdom to various undertakings of the Company, including reform and development, scientific and technological progress, market development, as well as production and operations, which promoted the business performance of the Company to a new level. The Board would like to express its sincere gratitude and highest respect to Mr. JIANG Dejun.

By order of the Board

SINOPEC ENGINEERING (GROUP) CO., LTD.

YIN Fengbing

Chief Financial Officer & Secretary to the Board

Beijing, the PRC

11 May 2026

As at the date of this announcement, directors of the Company are: ZHANG Xinming#, XIANG Wenwu, LI Chengfeng, YU Renming*, YE Zheng+, ZHAO Jinsong+, ZHANG Xuyan+ and XIE Yanli#.

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).

• For identification purpose only