China National Offshore Oil Corporation (CNOOC) is a super large state-owned enterprise (central enterprise) directly under the State owned Assets Supervision and Administration Commission of the State Council of China. Headquartered in Beijing, it currently has 98750 employees and four upstream branches in Tianjin, Zhanjiang, Shanghai, and Shenzhen. In refining, sales, and fertilizer enterprises such as CNOOC Gas Development and Utilization Company, China National Offshore Oil Corporation Sales Branch, CNOOC Chemical Co., Ltd., CNOOC Shandong Haihua Group Co., Ltd., and Huizhou Refining and Chemical Branch, the oil product testing process is provided by Beijing Times New Wei Measurement and Control Equipment Co., Ltd. for each plant area