Research and development of emerging energy technologies; Manufacturing of power transmission, distribution and control equipment; Technical services, technology development, technology consulting, technology exchange, technology transfer, and technology promotion; Construction of metal doors and windows engineering; Construction of landscaping and greening projects; Construction of earthwork engineering; External contracting projects; Construction of sports facilities engineering; Installation services for ordinary mechanical equipment; Thermal production and supply; Manufacturing of new energy prime mover equipment; Manufacturing of pumps and vacuum equipment; Motor manufacturing; Manufacturing of distribution switch control equipment; Manufacturing of power electronic components; Manufacturing of testing machines; Production of battery spare parts; Manufacturing of transportation equipment and counting instruments for production; Manufacturing of electronic measuring instruments; Specialized equipment repair. (Except for projects that require approval according to law, business activities can be carried out independently based on the business license) Licensed projects: Installation, maintenance, and testing of power transmission, power supply, and power receiving facilities; Design of intelligent building systems; Electrical installation services; Residential interior decoration and renovation; Construction projects (excluding nuclear power plant construction and operation, civil airport construction); Construction of cultural relic protection projects; Construction of geological hazard control engineering; Construction project construction; Stage engineering construction; Demolition of buildings (excluding blasting operations); Construction labor subcontracting; Construction professional operations; Power generation business, transmission business, and power supply (distribution) business; Power supply business; Hydropower