Not difficult. It is not difficult for Beijing Yanshan Petrochemical Company to have some basic theoretical knowledge. China Petrochemical Beijing Yanshan Petrochemical Company is a very large petrochemical enterprise in China. China Petrochemical Co., Ltd. Beijing Yanshan Branch was established in 1967, located in the southwest of Beijing, and is a super-large petrochemical joint venture directly under China Petrochemical Corporation. It has 63 main production units and 68 auxiliary production units, with crude oil processing capacity exceeding 1 00000 tons 1 year and ethylene production capacity exceeding 800000 tons1year. Can produce 94 kinds of petrochemical products, brand 43 1. It is one of the largest production bases of synthetic rubber, synthetic resin, phenol and acetone and high-quality refined oil in China.