Mechanical parts and parts processing; leather tanning processing; sales of rubber products; sales of paper products; wholesale of auto parts and accessories; retail of auto parts and accessories; sales of battery parts and accessories; production of battery parts and accessories; sales of automobile decorative products; sales of communication equipment; sales of car washing equipment; retail of motorcycles and spare parts; sales of machinery and equipment; sales of communication equipment; sales of electrical equipment; knitting and spinning Sales of fabrics and raw materials; sales of knitted textiles; wholesale of hardware products; research and development of hardware products; retail of hardware products; sales of metal products; sales of building decoration materials; wholesale of bicycles and spare parts; wholesale of electronic components; sales of building materials; wholesale of computer software, hardware and auxiliary equipment; technology import and export; import and export of goods; import and export agency; automobile parts and accessories manufacturing.