Difficult. Zhenhai Refining and Chemical Company of China Petrochemical Co., Ltd. is the backbone enterprise of China Petrochemical Co., Ltd., formerly known as Zhejiang Refinery, which was founded in 1975. Zhenhai Refining & Chemical Company was established after the overall reorganization of 1994 and listed on the Hong Kong Stock Exchange. As of September, 2022 13, the minimum standard of Zhenhai Refining and Chemical Company is undergraduate, so it is very difficult for two undergraduates to enter the company. On June 28th, 20021year, Zhenhai Refining and Chemical Base of China Petrochemical Company was fully built in Zhenhai, Ningbo, Zhejiang.