CNPC is one of the most important energy companies in the world. It is a state-run corporation whose commercial operations include a wide range of activities. CNPC engages in all stages of the oil industry, including exploration, exploitation, production, transportation and refining of hydrocarbons. It is also involved in national marketing, international commerce and the manufacture and supply of equipment.
According to the weekly publication U.S. Petroleum Intelligence, in 2009, CNPC took fifth place among the top 50 oil firms in the world, based on oil and gas reserve indexes, production figures, crude processing capacity and the sale of refined products. Furthermore, the company placed 10th among the 500 largest companies measured by sales, according to The Fortune Global 500, 2010 edition.