Production of transmission chains, chains, and transmission chain components; production projects of chains and sprockets for automobile timing systems. Services: design, technology development and transfer of technological achievements of automotive timing systems and chain drive systems, technical consulting and technical services for electronic products, computer software and hardware and auxiliary equipment, mechanical equipment, and communication equipment; wholesale and retail (including online sales): automotive timing systems, chain drive systems, automobiles Accessories, motorcycle accessories, hardware, steel, electronic products, computer software and hardware and auxiliary equipment, mechanical equipment, communication equipment, electronic components; import and export of goods (except for items prohibited by laws and administrative regulations, items restricted by laws and administrative regulations can only be operated after obtaining a license).