Research and development of motors and their control systems; Research and development of distribution switch control equipment; Mechanical equipment research and development; Research and development of new material technology; Research and development of emerging energy technologies; Research and development of electronic specialized materials; Wholesale of electronic components; Sales of specialized equipment for semiconductor devices; Sales of optoelectronic devices; Electronic product sales; Sales of integrated circuit chips and products; Sales of power electronic components; Sales of electronic specialized materials; Sales of electronic specialized equipment; Sales of distribution switch control equipment; Sales agent; Sales of electrical instruments and meters: Installation services for ordinary mechanical equipment; Trade brokers; Engineering management services; Import and export of technical expertise; Import and export of goods