Manufacturing of industrial automatic control system devices; manufacturing of automobile parts and accessories; sales of electronic vacuum devices; retail of motorcycles and spare parts; wholesale of electronic components; sales of mechanical parts and spare parts; wholesale of computer software, hardware and auxiliary equipment; sales of electronic products; repair of instruments and meters; sales of liquid and airtight components and systems; retail of hardware products; information technology consulting services; industrial Project management services; engineering technical services (except planning management, survey, design, and supervision); experimental analysis instrument manufacturing; technical services, technology development, technical consultation, technology exchange, technology transfer, and technology promotion; sales of industrial automatic control system devices; manufacturing of electrical instruments and meters; sales of intelligent instruments and meters; computer and office equipment maintenance; and metal product repair.