Manufacturing and processing of motorcycles, auto parts, plastic accessories, hardware, mechanical accessories, door locks, safes, and security products; wholesale and retail of metal materials, chemical raw materials (except flammable and explosive items), rubber, building materials, domestic motorcycles, transportation accessories, household appliances, electronic calculators and accessories, and general mechanical equipment; import and export of self-operated and agency goods and technologies, except for goods and technologies that are restricted by the state or prohibited from import and export.