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China Petroleum and Chemical Corporation, or Sinopec, is a Chinese oil and gas enterprise based in Beijing. It is listed in Hong Kong and also trades in Shanghai. Sinopec Limited's parent, Sinopec Group, is the world's largest oil refining, gas and petrochemical conglomerate, headquartered in Chaoyang District, Beijing. Sinopec's business includes oil and gas exploration, refining, and marketing; production and sales of petrochemicals, chemical fibers, chemical fertilizers, and other chemical products; storage and pipeline transportation of crude oil and natural gas; import, export and import/export agency business of crude oil, natural gas, refined oil products, petrochemicals, and other chemicals.