Dalian Zhonglian Oil International Trade Co., Ltd. is a subsidiary invested by China National United Oil Corporation, registered on February 4, 1994. The main business of the company includes the import and export trade of petroleum, chemicals, and other commodities permitted by the state; domestic trade of steel, building materials, aquatic products, machinery and equipment, instruments and meters, light industrial textiles, clothing, petroleum and its products (sold outside Dalian), chemical raw materials, and chemical goods; as well as chartering and booking of ships and consulting and services related to the main business.