General projects: Technical services, technical development, technical consultation, technical exchange, technical transfer, and technical promotion; Sales of battery swap facilities for new energy vehicles; Sales of electrical accessories for new energy vehicles; Sales of solar thermal power generation products Sales of photovoltaic equipment and components; Leasing of photovoltaic power generation equipment Energy storage technology services; Sales of charging piles Sales of power facilities and equipment; Business of wires and cables; Installation services for general mechanical equipment; Sales of digital video surveillance systems Security system monitoring service; Installation services for public facilities in environmental sanitation Research and development of household appliances Sales of household appliances Household appliance installation service; Sales of home audio-visual equipment; Furniture installation and repair services; Wholesale of hardware products Retail of hardware products Sales of plastic products Sales of electrical accessories Sales of metal tools Sales of lighting fixtures Information system integration services Sales of office equipment Software sales Professional cleaning, washing and disinfection services; Repair of household appliances Building cleaning services; Internet sales (excluding the sale of goods that require a license); Domestic service. (Except for projects that require approval in accordance with the law, business activities shall be carried out independently in accordance with the law based on the business license.