Sinopec Oilfield Service Corporation released a notice regarding its First Extraordinary General Meeting for 2025, scheduled for December 18, 2025, at 9:30 a.m. local time. The meeting will take place at Conference Room 7, 3rd Floor, Beijing Kuntai Royal Hotel, Chaowai Avenue No. B12, Chaoyang District, Beijing, in an on-site format.

The agenda includes a special resolution to approve amendments to the Articles of Association and to abolish the Supervisory Committee. Ordinary resolutions will also be discussed, covering the proposed use of reserves to offset the company’s losses, as well as the election of a new Non-executive Director.

Shareholders with names on the relevant register by December 9, 2025, are entitled to attend or appoint proxies. The closing date for share transfers is from November 19, 2025, through December 18, 2025, during which no transfers will be processed. Shareholders are advised to follow the company’s official procedures for proxy submissions and registration, and pertinent details on these steps are provided in the formal circular.