China National Petroleum

China National Petroleum is its nation's largest state-owned oil and gas producer. Since its founding in 1988, the company has expanded across 12 countries from Asia to Africa to South America. It has 14 large oil and gas field enterprises, 14 large-scale refining and petrochemical companies, and R&D units located across China.

In 2009, China National posted record overseas oil and gas production. The company also sealed a cooperative crude processing deal with Taiwan in June which could help improve the often testy relationship between the two governments.