Manufacturing of electronic components; wholesale of electronic components; manufacturing of special electronic equipment; manufacturing of other electronic components; manufacturing of other general instruments; sales of special electronic equipment; manufacturing of display devices; sales of display devices; manufacturing of metal structures; sales of metal structures; manufacturing of gears and gear reducers and gearboxes; sales of gears and gear reducers and gearboxes; Manufacturing of bearings, gears and transmission parts; sales of bearings, gears and transmission parts; manufacturing of general parts; manufacturing of springs; sales of springs; manufacturing of glass; manufacturing of technical glass products; sales of technical glass products; manufacturing of instruments and meters; sales of instruments and meters; manufacturing of automobile parts and accessories; manufacturing of motorcycle parts and accessories; automobile spare parts Wholesale; manufacturing of power transmission and distribution and control equipment; manufacturing of power transmission and distribution monitoring and control equipment; sales of intelligent power transmission, distribution and control equipment; manufacturing of hardware products; wholesale of hardware products; manufacturing of plastic products; sales of plastic products; mold manufacturing; mold sales; battery manufacturing; battery sales; battery spare parts production; battery spare parts sales; charging Pile sales; sales of new energy vehicle electrical accessories; sales of electrical equipment; operation of electric vehicle charging infrastructure; centralized fast charging stations; energy storage technology services; professional design services; hardware product research and development; technical services, technology development, technical consultation, technology exchange, technology transfer, technology promotion; import and export of goods; import and export of technology.