On 27 October 2022, the board of directors (the "Board") of China Oilfield Services Limited (the "Company") received the written resignation from Mr. Yu Feng, a current executive director of the Company. The resignation of Mr. Yu Feng as an executive director of the Company was due to the adjustment of his work arrangement, with effect from the date when a new executive director is appointed by the shareholders of the Company at the Extraordinary General Meeting. Mr. Yu Feng has confirmed that he has no disagreement with the Board and there is no matter that needs to be brought to the attention of the holders of securities of the Company and The Stock Exchange of Hong Kong Limited with regard to his resignation.

Mr. Yu Feng performed his work rigorously, diligently and pragmatically during his tenure as an executive director of the Company. Meanwhile, he effectively protected the interests of the shareholders, and the compliance and quality operation of the Company.