Manufacturing of coating equipment; sales of coating equipment; spray processing; plastic surface treatment; metal processing machinery manufacturing; mechanical parts and parts processing; sales of mechanical parts and components; manufacturing of automobile parts and accessories; sales of power electronic components; sales of electronic products; wholesale of computer software, hardware and auxiliary equipment; wholesale of automobile parts and accessories; manufacturing of motorcycle parts and accessories; wholesale of motorcycles and spare parts; sales of metal materials; sales of metal products; sales of plastic products; sales of chemical products (excluding licensed chemical products)