Sales of machinery and equipment; manufacturing of general equipment (excluding manufacturing of special equipment); repair of general equipment; installation services of general machinery and equipment; manufacturing of motorcycle parts and accessories; manufacturing of auto parts and accessories; retail of motorcycles and spare parts; wholesale of motorcycles and spare parts; retail of auto parts and accessories; wholesale of auto parts and accessories; wholesale of hardware products; retail of hardware products; sales of plastic products; sales of rubber products; technical services, technology development, technical consultation, technical exchanges, technology transfer, and technology promotion.