China Petroleum and Chemical Corporation (Sinopec Corp.) is China's largest producer and supplier of refined oil products and its second-largest crude oil producer. It is also China's largest petrochemicals producer and distributor and the world's fourth-largest ethylene producer. Operations include oil and gas exploration and production; crude oil processing; oil products trading, transportation, distribution, and marketing; and petrochemicals manufacturing. In 2010 it reported proved reserves of 2.9 billion barrels of oil and 6.5 trillion cu. ft. of natural gas; it also owns more than 29,600 gas stations and 34 refineries. China's government controls about 76% of the company through Sinopec Group.