Sinopec Oilfield Service Corporation in its ninth session of board meeting held on May 20, 2019, announced that Mr. Chen Xikun ("Mr. Chen") was elected as the Vice Chairman of the ninth session of the Board of the Company. The term of Mr. Chen will commence from 20 May 2019 to the date when the term of the ninth session of the Board expires (7 February 2021). Mr. Chen Xikun, the Secretary of CPC Committee and Deputy General Manager of the Company.

On 20 May 2019, the Board has approved to appoint Mr. Yuan Jianqiang ("Mr. Yuan") as General Manager of the Company. The term of office of Mr. Yuan as General Manager of the Company will commence from 20 May 2019 to the date when the term of the ninth session of the Board expires (expecting to be 7 February 2021). Mr. Yuan Jianqiang has been working for Henan Petroleum Exploration Administration of China Petrochemical Corporation as the deputy general manager and general manager of Drilling Company; in January 2008, he was appointed as deputy director of Henan Petroleum Exploration Administration of China Petrochemical Corporation; since December 2012, he acted as the executive director and general manager of Sinopec Henan Oil Engineering Company Limited; since June 2016, he acted as the executive director and general manager of Sinopec Huadong Oil Engineering Company Limited; from July 2017, he acted as the chairman of Sinopec Oilfield Equipment Corporation.

The Board announced that, since Mr. Chen has been elected as the Vice Chairman of the ninth session of the Board of the Company and considering that he has concurrently served as the Secretary of CPC Committee of the Company, in order to better perform his responsibilities as Vice Chairman of the Board and Secretary of CPC Committee of the Company, Mr. Chen has tendered his resignation as the Deputy General Manager of the Company with effect from 20 May 2019.