General projects: technical services, technical development, technical advice, technology exchange, technology transfer, technology promotion; science and technology extension and application services; graphic design development; artificial smart application software development; 3d printing base material sales; 3d printing services; sale of artificial smart hardware; furniture installation and maintenance services; rental services (without licensed rental services); installation of general machinery equipment; import and export of goods; import and export agents; sale of metal products; sale of plastic products; experimental machine sales; sale of electrical instrument instruments; sale of electronic and mechanical components; sale of electronic measurement instruments; sale of optical instruments; sale of automated industrial control systems; sale of electronic equipment; sale of electronic machinery and equipment; sale of furniture and equipment; sale of furniture and equipment w...