Research and development of distribution switch control equipment, manufacturing of power facilities and equipment, sales of electrical equipment, manufacturing of mechanical and electrical equipment, repair of electrical equipment, sales of fire-fighting equipment, sales of security equipment, sales of instruments and meters, sales of mechanical and electrical equipment, sales of building materials, sales of lightweight building materials, sales of power facilities and equipment, sales of new energy raw materials, sales of solar thermal utilization equipment, sales of solar thermal power generation products, sales of distribution switch control equipment, sales of lighting fixtures, retail of hardware products, wholesale of hardware products, sales of metal products, sales of metal structures, sales of power electronic components, sales of lighting fixtures, sales of wires and cables, sales of photovoltaic equipment and components, sales of household goods, sales of solar power generation technology services, safety system monitoring services, New material technology promotion services, fire protection technology services, technical services, technology development, technology consulting, technology exchange, technology transfer, and technology promotion (except for projects that require approval according to law, business activities can be carried out independently with a business license in accordance with the law)