Import and export of goods; general items of technology import and export: technical services, technology development, technical consultation, technology exchange, technology transfer, technology promotion; auto parts and accessories manufacturing; auto parts R&D; auto parts wholesale; hardware product manufacturing; hardware product R&D; hardware product wholesale; metal product R&D; Sales of metal products; sales of automobile decorative products; sales of molds; sales of machine tool functional parts and accessories; sales of rubber products; sales of plastic products; research and development of mechanical equipment; sales of mechanical equipment; research and development of motorcycle parts; retail of motorcycles and spare parts; manufacturing of special equipment for environmental protection; sales of special equipment for environmental protection