Dong Jin Wang

China Petroleum Engineering & Construction Corp. specializes in oil engineering, manufacturing, construction, and lump-sum contracting. The firm operates its business through following segments: Engineering Design, Construction and erection, Engineering Manufacture, Engineering Procurement and Technical Services. Its services include preliminary consultation on large oil projects, feasibility study, environmental impact and safety assessments, survey and measurement, design, procurement, construction, manufacturing, supervision, commissioning trial and operating maintenance as well as project engineering, procurement and construction () and project management contracting. The company was founded in 1998 and is headquartered in Beijing, China.

PetroChina Pipelines Co. Ltd. provides oil and gas pipeline transmission services. The company is headquartered in Langfang City, China.

China National Offshore Oil Corp. explores oil and gas properties. The firm offers oil and gas exploitation, chemical and fertilizer production and refining, natural gas and power generation, new energies development, financial and logistic services. The company was founded on February 15, 1982 and is headquartered in Beijing, China.

China National Petroleum Corp. engages in the production and supply of oil and gas products. Its businesses include petroleum exploration and production, natural gas and pipelines, refining and marketing, oilfield services, engineering construction, petroleum equipment manufacturing and new energy development, as well as capital management, finance, and insurance services. The company was founded on February 9, 1990 and is headquartered in Beijing, China.

China Southern Petroleum Exploration & Development Corp. provides oil and gas exploration services. The private company is based in Beijing, China. The Chinese company is ultimately controlled by the Government of China.

China National Oil & Gas Exploration & Development Corp. engages in overseas oil projects. Its activities include the management of exploration, development, and the production of oil and natural gas as well as investment management of the exploration and exploitation of oil resources. The company was founded on September 14, 1984 and is headquartered in Beijing, China.