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COSL CHINA OILFIELD SERVICES LIMITED ( A joint stock limited company incorporated in the People's Republic of China with limited liability ) ( Stock Code : 2883 ) OVERSEAS REGULATORY ANNOUNCEMENT ―FIRST QUARTERLY RESULTS This announcement is made pursuant to Rule 13.10B of the Rules Governing the Listing of Securities on The Stock Exchange of Hong Kong Limited . The financial data of First Quarterly Report for 2021 of the Company is prepared in accordance with PRC Accounting Standards for Business Enterprises and has not been audited . This announcement is prepared in both Chinese and English . In the event of any discrepancy between the two versions , the Chinese version shall prevail . 28 April 2021 As at the date of this announcement , the executive directors of the Company are Messrs . Zhao Shunqiang ( Chairman ) and Qi Meisheng ; the non - executive directors of the Company are Messrs . Xu Yugao and Zhao Baoshun ; and the independent non - executive directors of the Company are Messrs . Fong Chung , Mark , Wong Kwai Huen , Albert and Lin Boqiang .