Development, design, manufacturing, sales and related technical consultation of automobile and motorcycle parts, moulds, tooling equipment and general machinery; economic and technical information consultation; leasing of own houses, sites and equipment; sales of metal materials, wood, furnace materials and chemical products; self-operated and agent import and export business of various commodities and technologies (except for commodities or technologies that are restricted by the state or prohibited from import and export); provision of labor services; related institutions Processing and repair of mechanical equipment; processing and sales of steel; warehousing; sales of office supplies, labor protection supplies, mechanical equipment parts, fire-fighting supplies, electrical appliances, bearings, cables, motors, machine tool accessories and their standard parts, decoration materials, electronic products, cutting tools, measuring tools, inspection tools, and tools; recycling of waste materials; wholesale of coal; Limited to branch operations: Wholesale of refined oil products (limited to hazardous chemicals)