The supervisory committee of China Oilfield Services Limited announced that Mr. Zhao Bi has resigned as a supervisor of the Company with effect from 12 August 2022 due to expiry of his term of a supervisor. Mr. Zhao Bi has confirmed that he has no disagreement with the Supervisory Committee and there is no matter that needs to be brought to the attention of the shareholders and creditors of the Company regarding his resignation. The Company announced that Mr. Ma Xiuen (Mr. Ma) has been elected as the employee representative supervisor of the Company at the employee representatives meeting held on 12 August 2022.

The appointment is effective from 12 August 2022 with a term of three years. Mr. Ma Xiuen, Chinese, born in 1975, is an administrative officer. He graduated from China University of Petroleum (East China) with a Bachelor degree in July 1999.

From July 1999 to December 2001, he served as an assistant engineer of well testing in CNOOC Technical Services Limited. He served as the external affairs and the deputy secretary of the youth league committee of Tianjin Branch of China Oilfield Services Limited from December 2001 to December 2002. He also served as the Secretary and Secretary of Class II (officer in charge) of the Company from December 2002 to April 2006.

He served as the manager of the business services department, manager of the administration department, a general manager assistant and manager of the administration department of Tianjin Branch of the Company from April 2006 to May 2008. From May 2008 to July 2010, he served as the manager of the human resources department of Production Optimization Division of the Company. He served as the Director of Party and Mass Affairs Office and Deputy Director of the Party Committee Office of the administration department of the Company from July 2010 to February 2017.

He also served as Secretary to the Disciplinary Committee, Deputy Secretary to the Party Committee and the Deputy General Manager of the Shipping Division of the Company from February 2017 to June 2021. He has been the manager of human resources department of the Company since June 2021.