What is the difference between China United Petroleum and PetroChina?

[DiOlivia]

The differences between China United Petroleum and PetroChina are as follows: They have different predecessors: China United Petroleum Co., Ltd. is a petroleum foreign trade company jointly established by China National Petroleum Corporation and China National Chemicals Import & Export Corporation; while Sinopec is a super-large petroleum and petrochemical enterprise group reorganized and established by the state in July 1998 on the basis of the former China Petrochemical Corporation. It is a state-owned company solely funded by the state, an authorized investment institution, and a state-controlled company. They operate in different regions: They are located in different regions, with China United Petroleum having more oil fields, while Sinopec has more refineries. "PetroChina" and "Sinopec" are basically divided between the "north" and the "south". That is, the north is the territory of China United Petroleum, and the south is the territory of Sinopec. However, in recent years, this situation has seen some breakthroughs, just like China Netcom and China Telecom started to expand southward and northward respectively.