Mr. Wang Jinlong (王金龍) (“Mr. Wang”), is our chairman and non-executive Director. He was appointed as an executive Director on 31 December 2007 and redesignated as a non-executive Director on 1 January 2022. Mr Wang is also a director of certain subsidiaries of the Group. Mr. Wang is primarily responsible for the long term development strategy of the Group. He has over 30 years of experience in the oil and gas industry. Mr. Wang founded our Group in April 2002 as the executive director and general manager of Petro-king Oilfield Technology Ltd. Prior to that, he worked at 菲利普斯中國有限公司(Phillips China Inc.) (later known as 康菲石油中國有限公司 (ConocoPhillips China Inc.)) between 1994 and 2003 where he had served as a senior drilling/production engineer. Mr. Wang graduated from 西南石油學院 (Southwest Petroleum Institute*) with a Bachelor of Engineering degree majoring in drilling engineering in July 1986. Mr. Wang obtained a Midlevel Professional Qualification as an engineer in April 1993 issued by 中華人民共和國地質礦產部 (the PRC Ministry of Geology and Mineral Resources*), which was later reformed and incorporated into 中華人民共和國國土資源部 (the PRC Ministry of Land and Resources*), and a qualification of senior engineer issued by CNOOC in March 2002. Mr. Wang has been recognised for his contributions to the development of the technology of geology and was awarded certificates for such contributions by the PRC Ministry of Geology and Mineral Resources in December 1996. Under the CG Code, the roles of chairman and the chief executive officer should be separate and should not be performed by the same individual. Mr. Wang was performing both the roles of chairman and chief executive officer (the “CEO”) of the Group since the listing of the Company until 25 April 2016. Taking into account Mr. Wang’s strong expertise in the oil and gas industry, the Board considered that the roles of chairman and chief executive officer being performed by Mr. Wang enables more effective and efficient overall business planning, decision making and implementation thereof by the Group. However, in order to maintain good corporate governance and fully comply with the Code Provisions, Mr. Wang has resigned as the CEO on 25 April 2016.

Mr. Zhao Jindong (趙錦棟) (“Mr. Zhao”), is our executive Director. He joined our Group in 2003 as a vice general manager. He was appointed as an executive Director on 24 December 2012 and is also a director of certain subsidiaries of the Group. Mr. Zhao has over 30 years of experience in drilling and completion services of the oil and gas industry. Before joining our Group, Mr. Zhao was the senior drilling and completion engineer at 康菲石油公司 (ConocoPhillips Oil Company) from October 2002 to December 2003. He was employed by ConocoPhillips China Inc. from October 1997 to October 2002 where he was recognised for his exemplary performance and contributions to the operations in Xinjiang. Mr. Zhao started his career as an engineer trainee at 地質礦產部石油鑽井研究所 (Drilling Institute of Minority of Geology*) in December 1983. He continued his employment with the Drilling Institute of Minority of Geology where he became a senior engineer and an assistant manager of the drilling development department. Mr. Zhao graduated from 中國地質大學 (China Geology University*) with a diploma in drilling engineering in 1988. Mr. Zhao has been appointed as the CEO of the Group on 25 April 2016. On 1 December 2016, Mr. Zhao has resigned as the CEO of the Company due to health reason, but remained as an executive Director.

Mr. Lin Jingyu (林景禹) (“Mr. Lin”), has over 26 years of experience in the oilfield and gas field industry. Mr. Lin graduated from Xi’an Shiyou College* (西安石油學院) (currently renamed as Xi’an Shiyou University) with a Bachelor degree in petroleum engineering in 1996. He also graduated from Yangtze University with a Master degree in petroleum and gas engineering in 2007. Mr. Lin is qualified as a senior engineer in oil production engineering in China since December 2007. Prior to joining the Group, Mr. Lin worked in the Oil Production Technology Research Institute of Sinopec Henan Petroleum Exploration Bureau* (中石化河南石油勘探局採油工藝研究所) as an assistant engineer from July 1996 to October 2001. He also worked in the Engineering Technology Research Institute of Sinopec Henan Oilfield Branch Company* (中石化河南油田分公司工程技術研究院) from November 2001 to August 2008 and his last position was a senior engineer and a deputy section chief. Mr. Lin joined the Group in August 2008 and was mainly responsible for the production enhancement business. He has been promoted to a vice president of the Group and the general manager of the production enhancement department of the Group since September 2013. Mr. Lin is appointed as an executive Director and the chief executive officer of the company in March 2023.

Ms. Zhou Sisi (周思思)（“Ms. Zhou”）, is our executive Director. She joined the Group as our investor relation officer in July 2019, and was appointed as the vice president on 1 December 2023. Ms. Zhou is responsible for business development, customer relations, investor relations and the environmental, social and governance development of the Group. Ms. Zhou graduated from the University of Oregon in December 2015 with a bachelor’sdegree in Science. Before joining the Group, Ms. Zhou has approximately 3 yearsof working experience in the commercial banking industry.

Mr. Xin Junhe (辛俊和) (“Mr. Xin”), is our independent non-executive Director. He was appointed as an independent non-executive Director on 27 March 2017. He is also the chairman of our remuneration committee and a member of each of our audit committee, nomination committee and sanction oversight committee. He has over 40 years of experience in petroleum engineering services of the oil and gas industry. Mr. Xin graduated from 西南石油學院 (Southwest Petroleum Institute*) with a Bachelor of Engineering degree majoring in drilling engineering in 1982. After graduating from college, Mr. Xin joined 玉門石油管理局 (Yumen Petroleum Administrative Bureau), which is under the management of China National Petroleum Corporation (“CNPC”). He has worked for CNPC all his career and retired in December 2016 as the Deputy Chief Engineer of 中國石油海外勘探開發公司 (China National Oil and Gas Exploration and Development Company*). He has outstanding achievement throughout his career, has won first class National Scientific and Technological Progress Award, and has been receiving special government allowance from the State Council of the People’s Republic of China. Mr. Xin has been appointed as a director of many projects of CNPC and accumulated rich experience.

Mr. Leung Lin Cheong (梁年昌) (“Mr. Leung”), is an independent non-executive director. He was appointed as an independent non-executive Director on 2 June 2017. He is also the chairman of our audit committee and sanction oversight committee, and a member of each of our nomination committee and remuneration committee. Mr. Leung has been the managing director of Union Registrars Limited since May 2014. He was a part-time tutor for the Master of Corporate Governance of The Open University of Hong Kong (now renamed as Hong Kong Metropolitan University) from 2016 to 2020. Also he has been a part-time lecturer of the HKU SPACE in Risk Management for the HKCGI QP pre-examination course since September 2021. Mr. Leung was an independent non-executive director of Casablanca Group Limited (stock code: 2223) from October 2012 to May 2015 and an independent non-executive director and chairman of audit committee of Guangzhou Automobile Group Co., Ltd. (listed on both The Stock Exchange of Hong Kong Limited and the Shanghai Stock Exchange, with the stock codes “2238” and “601238” respectively) from December 2013 to May 2020. He was the chief legal and compliance officer of Shanghai Industrial Investment (Holdings) Co., Ltd. and the chief legal and compliance officer and company secretary of Shanghai Industrial Holdings Limited (stock code: 0363). He obtained a master’s degree in business administration jointly from Brunel University and Henley Management College and a master’s degree in Laws from University of London in 1995 and 2006, respectively. He is a fellow member of Hong Kong Institute of Certified Public Accountants, The Chartered Institute of Management Accountants, The Chartered Governance Institute, The Hong Kong Chartered Governance Institute and a founding member of The Hong Kong Independent Non-Executive Director Association.

Mr. Zhang Taiyuan (張太元) (“Mr. Zhang”), is our vice president and hold a concurrent post of general manager of ISPM. He is also a director of certain subsidiaries of the Group. He joined our Group in 2004 as a senior drilling supervisor and has been subsequently promoted to director of international projects and also to vice president. Mr. Zhang has over 36 years of experience in project management and drilling engineering of the oil and gas industry. He was an offshore drilling supervisor of Devon Energy China Ltd. prior to joining our Group from December 2002 to December 2004. Between January 2002 and December 2002, he was a project manager of Indonesia project of SPA, CNPC. Mr. Zhang acted as a CNPC engineering professional representative for CNPC-Burlington (then known as CNPC-ENRON) from October 1997 to January 2002. Prior, he was employed by 川中油氣公司 (Chuanzhong Oil and Gas Company of SPA*) from August 1986 where he acted as a drilling engineer. He graduated from 西南石油學院 (Southwest Petroleum Institute*) in 1986 with a Bachelor of Engineering degree, majoring in drilling engineering.

Mr. Chan Kwok Yuen Elvis (陳國源) (“Mr. Chan”), is the chief financial officer (the “CFO”) of the Company. He joined the Group in July 2018 and is responsible for the accounting, financial, and investor relation affairs of the Group. He has over 25 years of experience in the field of accounting and finance. Mr. Chan is a fellow of the Hong Kong Institute of Certified Public Accountants, a fellow of the Association of Chartered Certified Accountants, a Chartered Financial Analyst of the CFA Institute and a member of the Hong Kong Society of Financial Analysts. Mr. Chan obtained a bachelor’s degree in commerce from Queen’s University in Canada in 1995 and a master of science degree in corporate governance and directorship from the Hong Kong Baptist University in 2013.

Mr. Tung Tat Chiu, Michael (佟達釗) (“Mr. Tung”), was appointed as the company secretary of our Company on 18 February 2013. He is the senior partner of Tung & Co., a law firm providing legal advice as to Hong Kong laws to our Group since 2007. He holds a Bachelor of Arts degree in law and accounting from The University of Manchester, the United Kingdom. He has over 30 years of experience as practising lawyer in Hong Kong. He is also a China-Appointed Attesting Officer. Mr. Tung currently serves as a joint company secretary of Jiangxi Copper Company Limited (stock code: 358), Harbin Electric Company Limited (stock code: 1133) and Qingling Motors Co. Ltd (stock code: 1122) and the sole company secretary of Quantum Thinking Limited (stock code: 8050) and NOVA Group Holdings Limited (stock code: 1360), respectively. 

Mr. Tung is an external service provider engaged by us as our company secretary and Mr. Chan Kwok Yuen Elvis (陳國源), our CFO, will be the key contact person with whom Mr. Tung can contact.