601808: China Oilfield Services Limited(601808) announcement on the appointment of secretary of the board of directors, joint company secretary and authorized representative

Securities abbreviation: China Oilfield Services Limited(601808) securities code: 601808 Announcement No.: pro 2022-005 China Oilfield Services Limited(601808)

Announcement on the appointment of secretary of the board of directors, joint company secretary and authorized representative

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The company and all members of the board of directors guarantee that the contents of the announcement are true, accurate and complete, and bear individual and joint liabilities for any false records, misleading statements or major omissions in the announcement.

On January 21, 2022, China Oilfield Services Limited(601808) (hereinafter referred to as “the company” or “the company”) deliberated and adopted the proposal on appointing the Secretary of the board of directors, joint company secretary and authorized representative of the company at the first meeting of the board of directors in 2022. The board of directors agreed that Mr. Sun Weizhou should serve as the Secretary of the board of directors, joint company secretary and authorized representative of the company, Ms. Wu Xiuwei is approved to serve as the joint company secretary, effective from January 21, 2022.

The independent directors of the company believe that Mr. Sun Weizhou has the qualification of secretary of the board of directors of listed companies as required by laws and administrative regulations, has the necessary working experience to perform the duties of secretary of the board of directors, has obtained the qualification of secretary of the board of directors of Shanghai Stock Exchange, and agrees to act as secretary of the board of directors of the company.

The contact information of Mr. Sun Weizhou and Ms. Wu Xiuwei is as follows:

Contact address: No. 201, Haiyou street, Yanjiao Economic and Technological Development Zone, Sanhe City, Hebei Province

Tel: 010-84521685

Fax: 010-84521325

Email: [email protected].

It is hereby announced.

China Oilfield Services Limited(601808)

Board of directors

January 22, 2022

1 authorized representative means the authorized representative of the company in accordance with rule 3.05 of the rules governing the listing of securities on the stock exchange of Hong Kong Limited, and the authorized representative of the company in accordance with the Companies Ordinance

(Chapter 622 of the laws of Hong Kong) authorized representative of Part 16.

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