Sinopec Engineering Group Co Ltd. — Proxy Solicitation & Information Statement 2025

Nov 6, 2025

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)

Reply Slip for the First Extraordinary General Meeting for the Year 2025

To: SINOPEC Engineering (Group) Co., Ltd. (the "Company")

I (We) (Note 1)

of

Tel. No.: _______ being the holder(s)

of (Note 2) _______ H Share(s)/Domestic share(s) of

RMB1.00 each in the capital of the Company hereby confirm that I (we) wish to attend or appoint a proxy to attend on my (our) behalf the First Extraordinary General Meeting for the Year 2025 (the "EGM") to be held at 10 a.m. on Tuesday, 23 December 2025 at A67, Ande Road, Xicheng District, Beijing, the PRC.

Signature(s): _______

Date: _______

Notes:

1. Please insert full name(s) (in Chinese or in English) and registered address(es) as shown in the register of members in BLOCK LETTERS.
2. Please delete as appropriate and insert the number of shares of the Company registered under your name(s).
3. The completed and signed reply slip should be delivered to the Company by e-mail (Email: seg.ir@sinopec.com), by post or by hand at A67, Ande Road, Xicheng District, Beijing, the PRC (Postal Code: 100032) such that the same shall be received by the Company on or before Wednesday, 3 December 2025. Failure to sign and return this reply slip, however, will not preclude an eligible shareholder of the Company from attending the EGM.

For identification purposes only