The supervisory committee (the "Supervisory Committee") of Sinopec Oilfield Service Corporation (the "Company") announced that, on 29 March 2022, it has accepted the resignation of Mr. Ma Xiang ("Mr. Ma") from his position as a supervisor and the chairman in the Supervisory Committee since Mr. Ma has reached the statutory retirement age. According to the articles of association of the Company (the "Articles of Association"), Mr. Ma's resignation takes effect upon the submission of the resignation letter to the Supervisory Committee on 29 March 2022. Mr. Ma has confirmed that he has no disagreement with the Board of Directors of the Company (the "Board") and the Supervisory Committee and there are no other matters that need to be brought to the attention of the shareholders of the Company.