Wison Engineering Services Co Ltd is a Shanghai-based company that primarily operates through three segments. The petrochemicals segment provides engineering, procurement, and construction, or EPC, services to ethylene and downstream petrochemicals producers. The coal-to-chemicals segment provides a broad range of EPC services to coal-to-chemicals producers. The oil refinery segment provides procurement and construction management services to project owners for the construction of oil refineries. Wison Engineering Services generates the majority of its sales from Mainland China and Saudi Arabia.