Research, development, and manufacture of electronic products; Research, development, manufacture, and sales of secondary power supplies, hybrid integrated circuits, electronic countermeasure equipment, generators, instruments and meters, transmission machinery, mechanical vibration reduction equipment, energy-saving electrical appliances, mechanical parts, and electrical simulation equipment; Sales of specialized electromechanical products; Production and sales of vehicle equipment; Research, development, and manufacture of aviation power supply systems and microwave power modules. General items: Manufacture of smart vehicle-mounted equipment; Sales of smart vehicle-mounted equipment; Manufacture of servo control mechanisms; Sales of servo control mechanisms; Manufacture of optical instruments; Repair of instruments and meters; Manufacture of power transmission and distribution and control equipment; Manufacture of electric motors; Research and development of electric motors and their control systems; Sales of micro motors and components; Manufacture of micro motors and components; Manufacture of automotive parts and accessories; Manufacture of integrated circuit chips and products; Manufacture of optical glass; Manufacture of specialized instruments for navigation, surveying, meteorology, and oceanography; Manufacture of optoelectronic devices; Manufacture of optical communication equipment; Manufacture of smart instruments and meters; Manufacture of industrial automatic control system devices; Manufacture of IoT equipment; Manufacture of semiconductor discrete devices; Integrated circuit design; Integrated circuit chip design services; IoT technology research and development; Sales of electronic measuring instruments; Sales of optical communication equipment; Sales of optical glass; Sales of optoelectronic devices; Sales of integrated circuit chips and products; Sales of specialized ceramic products; Sales of electronic specialized materials; Sales of specialized instruments for navigation, surveying, meteorology, and oceanography; Manufacture of drawing, calculating, and measuring instruments; Manufacture of electronic components and electromechanical component equipment; Manufacture of integrated circuits; Sales of integrated circuits; Manufacture of electronic components; Sales of IoT equipment; Sales of marine environment monitoring and detection equipment; Sales of smart instruments and meters; Sales of industrial automatic control system devices.