On 31 May 2023, the board of directors of China Oilfield Services Limited received the written resignation from Mr. Wu Wenlai, a current non-executive director of the Company. The resignation of Mr. Wu Wenlai as a non-executive director of the Company and a member of the Remuneration and Assessment Committee of the Board was due to his retirement, which took effect from the date when a new executive director is appointed by the shareholders of the Company at the extraordinary general meeting. Mr. Wu Wenlai 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. Wu Wenlai performed his work rigorously, diligently and pragmatically during his tenure as a non-executive director of the Company, and made significant contributions to the development of the Company. The Board would like to express its heartfelt gratitude to Mr. Wu Wenlai.