Auto parts and accessories manufacturing; Auto parts wholesale; Auto parts retail; Auto parts research and development; Plastic product manufacturing; Plastic product sales; Hardware product manufacturing; Hardware product wholesale; Hardware product research and development; Mold manufacturing; Mold sales; Metal product sales; Metal chains and other metal products manufacturing; Metal product repair; Metal product research and development; Gold Structural manufacturing; metal tool manufacturing; technology import and export; goods import and export; import and export agency; technical services, technology development, technical consultation, technology exchange, technology transfer, technology promotion; electronic component manufacturing; electronic component wholesale; electronic component retail; integrated circuit manufacturing; integrated circuit design; integrated circuit sales; integrated circuit chip and product sales Sales; sales of electronic special equipment; manufacturing of power electronic components; sales of power electronic components; manufacturing of electronic components and electromechanical component equipment; sales of electronic components and electromechanical component equipment; sales of electronic products; information consulting services (excluding licensing information consulting services); information technology consulting services; sales agents; professional design services; labor services (excluding Labor dispatch); Internet of Things technology research and development; mechanical equipment research and development; motorcycles and parts research and development; valves and cocks research and development; waste heat, pressure and gas utilization technology research and development; emerging energy technology research and development; software development; motor and its control system research and development; greenhouse gas emission control technology research and development; intelligent robot research and development; power distribution switch control equipment research and development; household appliances research and development