There are several large oil companies in China.

Traditionally, there are four major oil companies, namely China Petroleum and Natural Gas Group (CNPC), China Petrochemical Group (Sinopec), China Offshore Oil Corporation (CNOOC) and Sinochem Group (Sinochem). In addition, there is Shaanxi Yanchang Oil Mine, which is a provincial enterprise in Shaanxi, but its output should not be underestimated.