Domesticcooperation----ChinaPetroleum China National Petroleum Corporation (China National Petroleum Corporation, CNPC) is a collection of oil and gas exploration and development, refining and petrochemical, oil product marketing, oil and g

Domesticcooperation----SinopecGroup China Petroleum Chemical Corporation (abbreviation Sinopec Group) is the July 1998 reorganization of the State in former China Petrochemical Corporation, established on the basis of large petroleum and pe

Domesticcooperation----ChinaNationalOffshoreOilCorporation China National Offshore Oil Corporation ( CNOOC China) is Chinas State-owned Assets Supervision and Administration Commission directly under the large state-owned enterprises (centr