R&D, production and sales: packaging products, wood products, plastic products and providing corresponding technical consultation and after-sales services; sales: mechanical spare parts, metal materials (excluding rare and precious metals), mechanical and electrical products, chemical products, building materials, decorative materials (the above three items do not include hazardous chemicals), office supplies, auto parts, motorcycles and accessories, wires and cables; packaging services; warehousing services (excluding items prohibited by the state and flammable and explosive items).