General equipment manufacturing (excluding special equipment manufacturing); general equipment repair; sales of metal products; sales of machinery and equipment; manufacturing of auto parts and accessories; retail of auto parts; manufacturing of motorcycle parts; retail of motorcycles and spare parts; wholesale of hardware products; retail of hardware products; sales of office supplies; sales of furniture spare parts; manufacturing of metal parts for construction; repair of daily products; software development; software sales; sales of electronic components and electromechanical component equipment; specialized Repair of equipment; repair of metal products; repair of instruments and meters; maintenance of transportation facilities; manufacturing of special electronic equipment; sales of special electronic equipment; research and development of metal products; research and development of mechanical equipment; manufacturing of special equipment (excluding manufacturing of licensed professional equipment); sales of industrial control computers and systems; manufacturing of industrial control computers and systems; sales of metal forming machine tools; sales of CNC machine tools; import and export of goods; import and export of technology; manufacturing of optoelectronic devices; sales of optoelectronic devices.