Jia Chengzao is a Doctorate degree holder, a senior engineer and a fellow of the Chinese Academy of Sciences. He has over 25 years of working experience in China's oil and geological industry. From August 1994, Mr. Jia has worked as the Deputy Chief Geologist of the Tarim Oil Exploration and Exploitation Headquarters and the Chief Geologist and Deputy Commander of the Tarim Oil Exploration and Exploitation Headquarters. From February 1998, he has also been a Vice President of the China Oil Exploration and Exploitation Scientific Research Institute of CNPC. From September 1999, Mr Jia worked as the Deputy General Manager of the Tarim Oil Field Branch of the Company. He has been the Chief Geologist of the Company from July 2000. Mr Jia has also served as the President of the China Oil Exploration and Exploitation Research Institute from December 2002 to October 2006. Mr Jia has been a Vice President of the Company since November 2005.