What is the relationship between PetroChina Liu Jian Company and PetroChina Engineering Construction Co., Ltd.

They are all subsidiaries of China Petroleum Group. China Petroleum Engineering Construction Company (CPECC for short) belongs to China Petroleum and Natural Gas Group Company, and is a professional company specializing in petroleum engineering design, manufacturing, construction and general contracting. Now it has developed into the most representative company of the group company in the field of petroleum engineering construction at home and abroad. China Petroleum Group Engineering Design Co., Ltd. (CPE) belongs to China Petroleum and Natural Gas Group, and its business scope mainly involves engineering survey, engineering design, general contracting, engineering consultation, engineering cost consultation, environmental impact assessment and high-tech product development in domestic and foreign oil and gas, chemical and petrochemical medicine, construction, municipal utilities and other industries.