China Petro Technic Development Co.
Beijing Huayou Natural Gas Stock Co., Ltd.
Beijing Poer Filter Co.
NorthChina Petro Sales Dept.
NorthChina Petro Chemistry Co., branch
Huhehaote Petro Chemistry Co., branch
Marine Petro Project Co., Ltd.
Beijing Yanshan Petro Chemistry Co., Ltd.
Beijing Riyu Co.
Tianjin Petro Chemistry Co.
Tianjin Chemical Industry Factory
Dagang Oil Field Sales Dept.
Dagang Oil refinery
EastHebei Oil Field Sales Dept.
Shenzhen Shengbaowang Co.
Beijing Keliqing Scientific Trade Co.
Beijing Diweier Petro Natural Gas Technic Development Co., Ltd.
Beijing Spaceflight Petro Chemistry Technic Equipment Project Co.
Liao River Oil Field
Inner Mongolia West Natural Gas Stock Co., Ktd.