1. CNPC Tongsheng Petroleum Co., Ltd. was established in February 2002. It is a limited company jointly funded by China Oil and Gas Co., Ltd., Shanghai Tongsheng Investment (Group) Co., Ltd. and other large local state-owned enterprises in Shanghai.
2. China Petroleum and Natural Gas Group Company is a comprehensive international energy company, whose main businesses are oil and natural gas business, engineering and technical services, petroleum engineering construction, petroleum equipment manufacturing, financial services and new energy development.