According to the enterprise data, China Offshore Oil Refining Co., Ltd. (hereinafter referred to as CNOOC Refining) is a wholly-owned subsidiary of China Offshore Oil Group Co., Ltd. (hereinafter referred to as China Offshore Oil), which was established in June 2005. The main business includes: production, sales, storage and transportation of petroleum refining, petrochemical and salt chemical products, research and development of oil refining technology, oil refining engineering design, etc.