General projects: extension and application services; technical services, technology development, technical advice, exchange, technology transfer, technology promotion; technology extension services; software development; installation services for general machinery; specialized equipment repair; sale of equipment for environmental protection; sale of instrument forms; retailing of electronic appliances; retailing of hardware products; electrical and cable operations; sale of rubber products; sale of plastics; sale of machinery equipment; sale of pumps and vacuum equipment; sale of valves and cyclones; sale of metal tools; sale of knives; 5g communications technology services; socio-economic consultancy services; information technology advisory services; enterprise management consulting; copyright agency; conference and exhibition services; image planning; distribution of electrical equipment; rental of hardware products; contracting of electrical and cable operations; construction o...