Digital technology services, technology services, technology development, technology consultation, technology exchange, technology transfer, technology promotion: Industrial engineering design services; Intelligent control system integration; Information consulting services (excluding licensed information consulting services); Professional design services; Information system integration service; Safety technology prevention system design and construction services, fire protection technology services, engineering management services: Instrument manufacturing; Communication equipment manufacturing; Manufacture of digital video surveillance system; Manufacturing of electrical signal equipment: Manufacturing of radar and supporting equipment; Manufacture of industrial automatic control system devices; Repair of general equipment: Sales of instruments and meters 1 sales of communication equipment; Sales of digital video surveillance systems: Sales of security equipment: Sales of industrial automatic control system devices: Sales of photovoltaic equipment and components: Sales of electronic products, retail of hardware products; Sales of building materials: Sales of fire-fighting equipment: Sales of mechanical equipment: Sales of special labor protective equipment; Retail of computer software promoters and auxiliary equipment: Sales of special equipment for oil refining and chemical production: Import and export of goods; Technology import and export, software development; Weighing instrument sales: Electrical equipment sales; Mechanical electrical equipment pin. (Except for projects subject to approval according to law, independently carry out business activities according to law with a business license) Licensed projects: Construction of construction projects; Electrical installation services