PetroChina Co., Ltd. engages in the provision of petroleum-related products, services and other activities. It operates through Oil, Gas and New Energy; Refining Chemicals and New Materials, Sales; Natural Gas Sales; Head Office and Other Segments. The Oil, Gas and New Energy segment involves in the exploration, development, production, transportation and sale of oil and natural gas. The Refining Chemicals and New Materials segment engages in the refining of crude oil and petroleum products to derivate chemical products. The Sales segment offers the trading and sale of refined petroleum products and non-oil products. The Natural Gas Sales segment includes the transmission and sale of natural gas. The Head Office and Other segment provides capital management, financing, headquarters management, and services to other operating segments. The company was founded on November 5, 1999 and is headquartered in Beijing, China.