Licensed projects: Construction engineering design: Construction engineering construction: Power generation business, transmission business, power supply (distribution) business (projects that require approval by law can only be carried out after approval by relevant departments, and specific business projects are subject to the approval results). General projects: technical services, technology development, technology consulting, technology exchange, technology transfer, technology promotion; Sales of optical communication equipment; Sales of optoelectronic devices; Sales of intelligent power transmission and distribution and control equipment: sales of advanced power electronic devices: sales of power facilities and equipment: sales of electronic components and electromechanical components equipment: sales of electrical equipment: wholesale of electronic components: retail of electronic components: sales of instruments and meters: sales of electrical accessories: sales of mechanical parts and components: sales of mechanical equipment; Sales of specialized equipment for environmental protection: wholesale of hardware products: retail of hardware products: sales of household appliances: retail of computer software and hardware and auxiliary equipment: wholesale of computer software and hardware and auxiliary equipment: sales of network equipment: sales of electronic products: construction of landscaping projects; Energy saving management services; Engineering management services: Home appliance installation services: Contract energy management; Software development: information system integration services: big data services: Internet data services: cloud computing equipment technology services: consulting planning services: artificial intelligence application software development: information consulting services (excluding licensing information consulting services); Marketing planning: Environmental consulting services: Solar power generation technology services: Solar thermal power generation product sales: Photovoltaic equipment and component sales: Energy storage technology services: Photovoltaic power generation equipment leasing; Research and development of emerging energy technologies; Sales of new energy original equipment