Manufacturing and self-sales of special electrical parts for automobiles and motorcycles, special accessories for household appliances, analytical instruments and accessories, and general mechanical parts; self-operated and agent import and export business of various commodities and technologies (except for commodities and technologies that are operated by national companies and prohibited from import and export). General projects: R&D of automobile parts; manufacturing of mechanical and electrical equipment; sales of mechanical and electrical equipment; technical services, technology development, technical consultation, technology exchange, technology transfer, technology promotion; manufacturing of auto parts and accessories; sales of industrial automatic control system devices; manufacturing of industrial automatic control system devices; industrial engineering design services; sales of packaging materials and products; sales of office supplies; sales of metal materials; leasing of machinery and equipment; import and export of goods; import and export of technology