According to a notice dated 2 March 2026, Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited disclaim responsibility for the content or accuracy of the announcement. Sinopec Oilfield Service Corporation (the “Company”) has scheduled a board meeting on 16 March 2026. The meeting will consider and approve the audited annual results for the twelve months ended 31 December 2025, as well as attend to any other business if necessary.

The Company’s Board of Directors currently comprises Executive Directors Mr. Wu Baizhi and Mr. Zhang Jiankuo, Non-Executive Directors Mr. Wang Minsheng, Ms. Zhang Lili, and Mr. Du Kun, and Independent Non-Executive Directors Mr. Zheng Weijun, Mr. Wang Pengcheng, and Ms. Liu Jiangning.