China Petroleum & Chemical Corporation Tianjin subsidiary company’s predecessor is Tianjin Petrochemistry Company, which was a national extra large refinery, chemical industry, and chemical fiber integration enterprise, established in 28 December 1983. Tianjin Subsidiary company is located in Tianjin Binhai New District Big Harbor Area, east near the Bohai Sea oil field, south depends on the big harbor oil field, occupied 16.47 square kilometers.