Manufacturing of special equipment for oil refining and chemical production, special equipment for daily chemicals, motorcycle accessories, auto parts, hydraulic and pneumatic power machinery and components, and metal structures; processing of mechanical parts; sales of general machinery and accessories, special equipment, electrical machinery and equipment, metal materials, building materials, chemical products and raw materials (excluding dangerous goods), Wujinjiaodian, electronic products, rubber and plastic products, instruments and meters, and daily necessities.