Yan Sheng Li

Wison Engineering Ltd. provides consultancy, engineering, procurement and construction management services to the petrochemical industry, coal chemical, and oil refining unit engineering markets. It also offers engineering consultation, chemical, petrochemical, and pharmaceutical engineering design. The firm also operates as a general contractor for chemical and petroleum engineering construction. The company is headquartered in Zhangjiang, China.

Shandong Qilu Petrochemical Engineering Co. Ltd. is a Chinese company that engages in petrochemical production process. The private company is based in Zibo, China.