Mr. Wang Jinlong (王金龍) (“Mr. Wang”), is our chairman and non-executive Director. He wasappointed as an executive Director on 31 December 2007 and redesignated as anon-executive Director on 1 January 2022. Mr Wang is also a director of certainsubsidiaries of the Group. Mr. Wang is primarily responsible for the long termdevelopment strategy of the Group. He has over 30 years of experience in theoil and gas industry. Mr. Wang founded our Group in April 2002 as the executivedirector and general manager of Petro-king Oilfield Technology Ltd. Prior tothat, 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 hadserved as a senior drilling/production engineer. Mr. Wang graduated from 西南石油學院 (Southwest Petroleum Institute) with a Bachelor of Engineeringdegree majoring in drilling engineering in July 1986. Mr. Wang obtained aMidlevel 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 waslater 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 ofsenior engineer issued by CNOOC in March 2002. Mr. Wang has been recognised forhis contributions to the development of the technology of geology and wasawarded certificates for such contributions by the PRC Ministry of Geology andMineral Resources in December 1996. Under the CG Code, the roles of chairmanand the chief executive officer should be separate and should not be performedby the same individual. Mr. Wang was performing both the roles of chairman andchief executive officer (the “CEO”) of the Group since the listing of theCompany until 25 April 2016. Taking into account Mr.strong expertise in the oiland gas industry, the Board considered that the roles of chairman and chiefexecutive officer being performed by Mr. Wang enables more effective andefficient overall business planning, decision making and implementation thereofby the Group. However, in order to maintain good corporate governance and fullycomply with the Code Provisions, Mr. Wang has resigned as the CEO on 25 April2016.

Mr. Zhao Jindong (趙錦棟) (“Mr. Zhao”), is our executive Director. He joined our Group in2003 as a vice general manager. He was appointed as an executive Director on 24December 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 theoil and gas industry. Before joining our Group, Mr. Zhao was the seniordrilling 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 2002where he was recognised for his exemplary performance and contributions to theoperations 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. Hecontinued his employment with the Drilling Institute of Minority of Geologywhere he became a senior engineer and an assistant manager of the drillingdevelopment department. Mr. Zhao graduated from 中國地質大學 (China Geology University) with a diploma in drilling engineeringin 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 tohealth reason, but remained as an executive Director.

Mr. Lin Jingyu (林景禹) (“Mr. Lin”), has over 26 years of experience in the oilfield andgas 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 Bachelordegree in petroleum engineering in 1996. He also graduated from YangtzeUniversity with a Master degree in petroleum and gas engineering in 2007. Mr.Lin is qualified as a senior engineer in oil production engineering in Chinasince December 2007. Prior to joining the Group, Mr. Lin worked in the OilProduction Technology Research Institute of Sinopec Henan Petroleum ExplorationBureau(中石化河南石油勘探局採油工藝研究所) as an assistantengineer from July 1996 to October 2001. He also worked in the EngineeringTechnology 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 asenior engineer and a deputy section chief. Mr. Lin joined the Group in August2008 and was mainly responsible for the production enhancement business. He hasbeen promoted to a vice president of the Group and the general manager of theproduction enhancement department of the Group since September 2013. Mr. Lin isappointed as an executive Director and the chief executive officer of thecompany in March 2023.

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

Mr. Zhang Taiyuan (張太元) (“Mr. Zhang”), is our vice president and hold a concurrent postof general manager of ISPM. He is also a director of certain subsidiaries ofthe Group. He joined our Group in 2004 as a senior drilling supervisor and hasbeen subsequently promoted to director of international projects and also tovice president. Mr. Zhang has over 36 years of experience in project managementand drilling engineering of the oil and gas industry. He was an offshoredrilling supervisor of Devon Energy China Ltd. prior to joining our Group fromDecember 2002 to December 2004. Between January 2002 and December 2002, he wasa project manager of Indonesia project of SPA, CNPC. Mr. Zhang acted as a CNPCengineering 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 heacted as a drilling engineer. He graduated from 西南石油學院 (Southwest Petroleum Institute) in 1986 with a Bachelor of Engineeringdegree, majoring in drilling engineering.

Mr. Chan Kwok Yuen Elvis (陳國源) (“Mr. Chan”), is the chief financial officer (the “CFO”) of theCompany. 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 ofexperience in the field of accounting and finance. Mr. Chan is a fellow of theHong Kong Institute of Certified Public Accountants, a fellow of theAssociation of Chartered Certified Accountants, a Chartered Financial Analystof the CFA Institute and a member of the Hong Kong Society of FinancialAnalysts. Mr. Chan obtained a bachelor’s degree in commerce from Queen’s University in Canada in 1995 and a master of science degree in corporategovernance and directorship from the Hong Kong Baptist University in 2013.Mr.Chan was appointed as the company secretary of the company in March 2024.