CPE was established by 9 shareholders, including China Petroleum and Natural Gas Group, Sichuan Petroleum Administration, North China Petroleum Administration, Jihua Group, Dalian Petrochemical Company, Liaohe Petroleum Exploration Bureau, Fushun Petrochemical Company, Qinghai Petroleum Administration and Liaoyang Chemical Fiber Company. There are eight branches in Southwest China, Northeast China, Beijing, Fushun, Dalian, Liaoyang, Qinghai and Geotechnical Engineering, and PetroChina Liaohe Engineering Co., Ltd., Dujing Company and Liaoyang Chemical Fiber Company.