Anton Oilfield Services Group — Board/Management Information 2011

May 16, 2011

Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited take no responsibility for the contents of this announcement, make no representation as to its accuracy or completeness and expressly disclaim any liability whatsoever for any loss howsoever arising from or in reliance upon the whole or any part of the contents of this announcement.

==> picture [256 x 143] intentionally omitted <==

CHANGE OF EXECUTIVE DIRECTOR

RESIGNATION OF EXECUTIVE DIRECTOR

The board of directors (the “Board”) of Anton Oilfield Services Group (the “Company”) announces that Mr. Ma Jian (“Mr. Ma”) has resigned as an executive director of the Company with effect from 16 May 2011at the board meeting of the Company held immediately after the conclusion of the annual general meeting held on 16 May 2011. The resignation of Mr. Ma is due to his personal reason but he continues to serve as an Executive Vice President of the Company and focuses on overseas operations of the Company.

Mr. Ma confirmed that he has no claim against the Company in respect of any fees or compensation for loss of office and there is no disagreement with the Board and there are no matters relating to his resignation that need to be brought to the attention of the shareholders of the Company or The Stock Exchange of Hong Kong Limited (the “Stock Exchange”).

The Board would like to express its gratitude to Mr. Ma for his support, devotion and invaluable contributions during his tenure of director’s office.

APPOINTMENT OF EXECUTIVE DIRECTOR

The Board is pleased to announce that Mr. Liu Enlong (“Mr. Liu”) has been appointed as an executive director of the Company with effect from 16 May 2011.

Liu Enlong (劉恩龍), aged 49, is an executive president of the Company. Mr. Liu joined the Company and its subsidiaries (the “Group”) in 2010. He is responsible for management of business clusters and technology cooperation of the Group. Prior to

— 1 —

joining the Group, Mr. Liu was employed by a Canadian Energy Technology Company in 2005 to be responsible for technical services, and was employed by China National Petroleum Corporation between 1982 and 2001 and was appointed as the deputy manager and chief engineer of North China Oil Field No.4 Exploration Corporation (華北油田第四勘探指揮公司) in 1997. He has more than 29 years of experience in the petroleum industry. Mr. Liu has a bachelor degree in well bore engineering from Jianghan Petroleum Institute (江漢石油學院) and is also a senior engineer in well bore engineering.

Save as disclosed above, Mr. Liu did not hold any directorship in other listed public company in the last three years and he does not hold any position with the Company and its subsidiaries.

Mr. Liu has entered into an written service contract with the Company for a term of 3 years commencing from 16 May 2011. In accordance with the Company’s Article of Association, Mr. Liu will hold office until the forthcoming general meeting of the Company after his appointment and will be eligible for re-election at that meeting and is thereafter subject to rotation requirements and re-election. Mr. Liu will receive a remuneration package based on the Company’s remuneration policy adopted for executive directors and prevailing market conditions.

Mr. Liu does not have any interest in the shares of the Company which is required to be disclosed under Part XV of the Securities and Futures Ordinance.

Mr. Liu is not connected with any directors, senior management, substantial or controlling shareholders (as defined in the Rules (the “Listing Rules”) Governing the Listing of Securities on the Stock Exchange) of the Company.

Save as disclosed herein, there is no information to be disclosed pursuant to the requirements of Rules 13.51 (2) (h) to (v) of the Listing Rules relating to the appointment of Mr. Liu and that need to be brought to the attention of shareholders of the Company.

The Board would like to express its warm welcome to Mr. Liu for joining the Board.

By order of the Board Anton Oilfield Services Group Luo Lin Chairman

Hong Kong, 16 May 2011

As at the date of this announcement, the Executive Directors of the Company are Mr Luo Lin, Mr Wu Di and Mr Liu Enlong; and the Independent Non-executive Directors are Mr Zhang Yongyi, Mr Zhu Xiaoping and Mr Wang Mingcai.

— 2 —