Mechanical parts and parts processing; sales of mechanical equipment; maintenance of electronic and mechanical equipment (excluding special equipment); sales of optoelectronic devices; manufacturing of instruments and meters; sales of instruments and meters; retail of auto parts and accessories; retail of motorcycles and spare parts; manufacturing of motorcycle parts and accessories; manufacturing of auto parts and accessories; auto parts remanufacturing; sales of molds; mold manufacturing; sales of electrical instruments and meters; manufacturing of industrial automatic control system devices; sales of industrial automatic control system devices; Manufacturing of metal materials; sales of metal materials; operation of wires and cables; sales of electronic products; retail of hardware products; manufacturing of hardware products; sales of labor protection supplies; sales of mechanical parts and components; standardized services; sales of cutting tools; cutting tool manufacturing; technical services, technology development, technical consulting, technical exchanges, technology transfer, and technology promotion; information consulting services (excluding licensing information consulting services); manufacturing of electronic components and electromechanical component equipment; manufacturing of electronic components