Repair of metal products; repair of general equipment; repair of instruments and meters; manufacturing of special measuring or inspection instruments for railways; manufacturing of electronic measuring instruments; manufacturing of special instruments and meters for agriculture, forestry, animal husbandry and fishery; manufacturing of special instruments and meters for environmental monitoring; manufacturing of intelligent instruments and meters; manufacturing of electrical instruments and meters; manufacturing of industrial automatic control system devices; manufacturing of Internet of Things equipment; manufacturing of power facilities and equipment; R&D of motors and their control systems; manufacturing of mechanical and electrical equipment; manufacturing of power transmission, distribution and control equipment; manufacturing of electrical accessories; manufacturing of photovoltaic equipment and components; manufacturing of distribution switch control equipment ; Manufacturing of capacitors and supporting equipment; manufacturing of transformers, rectifiers and inductors; manufacturing of power dynamometers; manufacturing of greenhouse gas emission control equipment; manufacturing of specialized machinery for agriculture, forestry, animal husbandry and fishery; manufacturing of machinery parts for agriculture, forestry, animal husbandry and fishery; manufacturing of special electronic equipment; manufacturing of special equipment for semiconductor devices; manufacturing of special equipment for feed production; manufacturing of auto parts and accessories; sales of molds; mold manufacturing; sales of water transportation equipment spare parts; sales of assistive bicycles, scooters and spare parts; wholesale of bicycles and spare parts; retail of bicycles and spare parts; motorcycles Wholesale of automobiles and spare parts; retail of motorcycles and spare parts; wholesale of automobile spare parts; retail of automobile spare parts; manufacturing of off-highway recreational vehicles and spare parts; sales of off-highway recreational vehicles and spare parts; manufacturing of motorcycle spare parts; sales of special instruments for environmental monitoring; manufacturing of special equipment for environmental protection; sales of livestock machinery; manufacturing of livestock machinery; sales of intelligent agricultural equipment; network and information security software development; artificial intelligence basic software development; software development; Internet of Things technology research and development; new material technology research and development; greenhouse gas emission control technology research and development; technical services , technology development, technology consultation, technology exchange, technology transfer, technology promotion; network technology services; integrated circuit manufacturing; integrated circuit sales; integrated circuit design; integrated circuit chip and product manufacturing; integrated circuit chip and product sales; integrated circuit chip design and service; hardware product retail; hardware product wholesale; power electronic component manufacturing; power electronic component sales; electronic component manufacturing; electronic component wholesale; electronic component retail; electronic component and electromechanical component equipment manufacturing; electronic component and electromechanical component equipment sales;