Born in 1956, Mr Wang is a professor-level senior engineer. He graduated from China University of Petroleum majoring in petroleum geology and exploration and received a doctorate degree. He has nearly 30 years of working experience in China’s oil and gas industry. From June 1996 to September 1999, Mr. Wang served as the deputy director and chief exploration geologist of Xinjiang Petroleum Administration Bureau. From September 1999 to May 2004, he served as the general manager of Xinjiang Oilfield Company. From June 2001 to May 2004, he served as the senior executive of Xinjiang Petroleum Administration Bureau. From July to December 2003, he served as the Assistant to General Manager of China National Petroleum Corporation (“CNPC”). From December 2003 to April 2011, he served as the Deputy General Manager of CNPC. From July 2004 to July 2007, he also served as the safety director of CNPC. From November 2005 to 14 April 2011, he served as a Director of PetroChina Company Limited, a company listed on the New York Stock Exchange, The Stock Exchange of Hong Kong Limited and Shanghai Stock Exchange respectively. Since 8 April 2011, Mr. Wang serves as Chairman of China National Offshore Oil Corporation. Mr. Wang was appointed as Chairman and Non-executive Director of the Company with effect from 15 April 2011.

Born in 1961, Mr. Yang is a professor-level senior engineer and graduated from China University of Petroleum with a B.S. degree in petroleum engineering. He also received an MBA degree from the Sloan School of Management at MIT as a Sloan Fellow. Mr. Yang joined CNOOC in 1982 and has over 30 years of experience in petroleum exploration and production. From 1982 to 1992, Mr. Yang served in a number of positions in CNOOC Research Center including the Director of Field Development Department, the Manager of Reservoir Engineering Department and the Project Manager. Thereafter, Mr. Yang was mainly involved in international business, M&A, corporate finance and capital market operations in the Company and its subsidiaries. From 1993 to 1999, he served as the Deputy Chief Geologist, the Deputy Director and the Acting Director for Overseas Development Department of the Company and the Vice President of CNOOC International Limited, a subsidiary of the Company. In 1999, Mr. Yang became a Senior Vice President of the Company and served as Chief Financial Officer of the Company from January 2005 to September 2010, Executive Vice President of the Company from October 2005 to March 2009, President of the Company from March 2009 to September 2010, and was appointed as Vice Chairman of the Board and Chief Executive Officer of the Company with effect from 16 September 2010. Mr. Yang also served as an Assistant President of CNOOC from November 2006 to April 2010 and as Vice President of CNOOC from April 2010 to August 2011. Mr. Yang was appointed as Director and President of CNOOC in August 2011. In addition, he serves as Chairman and Director of CNOOC China Limited and CNOOC International Limited, both being subsidiaries of the Company. He was Director and President of CNOOC Southeast Asia Limited, a subsidiary of the Company, from 2002 to 2003, General Manager of CNOOC China Limited, a subsidiary of the Company, from February 2009 to July 2011, Chairman and Director of CNOOC Southeast Asia Limited, a subsidiary of the Company, from July 2009 to September 2010, Chairman and Director of CNOOC Deepwater Development Limited from January 2010 to September 2010 and a Director of CNOOC Finance Corporation Limited, a subsidiary of CNOOC, from May 2005 to December 2010. Mr. Yang was appointed as an Executive Director of the Company with effect from 31 August 2005. He resigned as Chief Executive Officer of the Company and was re-designated from an Executive Director to a Non-Executive Director of the Company with effect from 23 November 2011.

Born in 1950, Mr. Zhou, a member of Chinese Academy of Engineering, received a doctorate degree from the Southwest Petroleum Institute in China majoring in petroleum and natural gas engineering. He joined CNOOC in 1982. Mr. Zhou served as the Deputy General Manager of CNOOC Bohai Corporation, a subsidiary of CNOOC and the General Manager of CNOOC China Limited Tianjin Branch. He was appointed as an Executive Vice President of the Company in September 1999 and served as the President of the Company from July 2002 to March 2009. Since 2000, Mr. Zhou has been a Vice President of CNOOC. He also served as a Director and the General Manager of CNOOC China Limited, a subsidiary of the Company. From October 2004 to July 2009, Mr. Zhou served as a Director of CNOOC International Limited, a subsidiary of the Company. From April 2003 to July 2009, Mr. Zhou also served as the Chairman of CNOOC Southeast Asia Limited, a subsidiary of the Company. From December 2003 to December 2010, Mr. Zhou served as the Chairman of Offshore Oil Engineering Co., Ltd., a listed company on the Shanghai Stock Exchange and a subsidiary of CNOOC. Mr. Zhou was appointed as an Executive Director of the Company with effect from 23 August 1999 and was re-designated from Executive Director to Non-executive Director with effect from 31 March 2009.

Born in 1952, Mr. Wu is a professor-level senior engineer and graduated with a bachelor degree from Dalian University of Technology, majoring in Offshore Petroleum Engineering and Construction. He later received an EMBA degree from Shanghai Jiao Tong University. Mr. Wu joined the petroleum industry in 1971. He joined CNOOC in 1980 when it was still in the pre-establishment stage. From 1993 to 2000, he was Deputy General Manager of CNOOC Nanhai West Corporation, a subsidiary of CNOOC and the President of CNOOC Chemical Limited, a subsidiary of CNOOC. He was also the Chairman of the Board of Directors of Fudao Fertilizer Limited and CNOOC Chemical Limited, both being subsidiaries of CNOOC, from 2001 to 2003 and from 2003 to 2005 respectively. From 2003 to 2004, Mr. Wu was an Assistant President of CNOOC and then was appointed as Vice President of CNOOC in August 2004. Mr. Wu also served as the Chairman and President of CNOOC Gas and Power Group, the General Manager of CNOOC Oil & Petrochemicals Co., Ltd., both being subsidiaries of CNOOC, as well as the Chairman of a number of subsidiaries of CNOOC. Mr. Wu also serves as Chairman of CNOOC Oil & Petrochemicals Co., Ltd., CNOOC and Shell Petrochemical Co. Ltd and a number of subsidiaries of CNOOC. Mr. Wu was appointed as an Executive Director of the Company with effect from 31 August 2005 and was re-designated from Executive Director to Non-executive Director with effect from 1 September 2006.