Manufacturing of power distribution switchgear equipment; manufacturing of power transmission and distribution and control equipment; manufacturing of transformers, rectifiers, and inductors; research and development of power distribution switchgear equipment; research and development of high-efficiency energy-saving technologies for the power industry; sales of power distribution switchgear equipment; sales of intelligent power transmission and distribution and control equipment; manufacturing of power transmission, transformation, and distribution monitoring and control equipment; sales of power transmission, transformation, and distribution monitoring and control equipment; operation of electric vehicle charging infrastructure; leasing of charging control equipment; sales of charging piles; manufacturing of mechanical and electrical equipment; sales of mechanical and electrical equipment; centralized fast charging stations; research and development of emerging energy technologies; energy storage technical services; manufacturing of photovoltaic equipment and components; sales of photovoltaic equipment and components; leasing of photovoltaic power generation equipment; technical services for solar power generation; manufacturing of new energy original equipment; sales of new energy original equipment; sales of solar thermal utilization products; sales of solar thermal power generation equipment; industrial engineering design services; manufacturing of lighting appliances; sales of lighting appliances; manufacturing of specialized equipment for lighting appliance production; sales of specialized equipment for lighting appliance production; retail of electronic components; sales of electronic products; retail of hardware products; sales of plastic products; operation of wires and cables; manufacturing of plastic products; installation services for general mechanical equipment; manufacturing of instruments; sales of instruments; sales of daily necessities; sales of building materials; sales of metal materials; sales of textiles; manufacturing of rubber products; sales of rubber products; processing of mechanical parts and components; integrated circuit design; road cargo transportation of ordinary freight vehicles with a total mass of 4.5 tons and below (excluding online freight and dangerous goods). Licensed items: Installation, repair, and testing of power transmission, power supply, and power receiving facilities; electrical installation services.