China Oilfield Services Limited announces that Mr. Li Zhi has resigned as a supervisor of the company with effect from 30 July 2019, and that Mr. Zhao Bi has been appointed as a supervisor of the company with effect from 30 July 2019 due to expiry of his term of appointment. Mr. Li Zhi 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 announce that Mr. Zhao Bi has been elected as the employee supervisor of the company at the employee representatives meeting held on 30 July 2019. The appointment is effective from 30 July 2019. Mr. Zhao Bi, born in June 1981, is now acting as Deputy General Manager of HR department of COSL. Mr. Zhao Bi graduated from human resources major of Yangtze University with bachelor degree. From July 2003, he served at the position of Driller and Assistant Well Workover supervisor at COSL IPM Division SZ36-1/QK17-2 project team.