Nonferrous metal rolling processing; metal material manufacturing; metal material sales; general equipment manufacturing (excluding special equipment manufacturing); machinery and equipment sales; import and export of goods; technology import and export; automobile parts and accessories manufacturing; motorcycle parts manufacturing; motorcycles and spare parts retail; motorcycles and spare parts wholesale; power-assisted bicycles, scooters and spare parts sales; automobile spare parts wholesale; automobile spare parts retail; rubber products Sales of products; manufacturing of rubber products; sales of high-performance sealing materials; sales of sealing fillers; manufacturing of sealing fillers; sealant manufacturing; technical services, technology development, technical consultation, technology exchange, technology transfer, and technology promotion; information technology consulting services; processing of renewable resources; processing of metal scraps and chips; sales of renewable resources; recycling of renewable resources (except productive scrap metal); recycling of productive scrap metal.