Production of gas appliances; manufacturing of non-electric household appliances; wholesale of kitchenware, sanitary ware and daily sundries; retail of daily household appliances; sales of household appliances; repair of household appliances; sales of electric heating food processing equipment; manufacturing of metal daily necessities; manufacturing of mechanical and electrical equipment; sales of mechanical and electrical equipment; non-electric household appliances Sales of appliances; manufacturing of special equipment for the production of food, wine, beverages and tea; manufacturing of refrigeration and air-conditioning equipment; sales of refrigeration and air-conditioning equipment; sales of daily necessities; manufacturing of gas compression machinery; sales of gas compression machinery; retail of computer software, hardware and auxiliary equipment; manufacturing of computer software, hardware and peripheral equipment Manufacturing; air pollution prevention and control services; fan and fan manufacturing; fan and fan sales; household appliance manufacturing; rental services (excluding licensed rental services); mechanical equipment rental; household appliance research and development; sales of building decoration materials; building decoration, plumbing parts and other construction funds Product manufacturing; electrical equipment repair; building cleaning services; artificial intelligence application software development; special equipment repair; landscaping project construction; general mechanical equipment installation services; household appliances spare parts sales; research and development of kitchenware, sanitary ware, and daily sundries; and retail of kitchenware, sanitary ware, and daily sundries. Licensed projects: installation and maintenance of gas burning appliances; production of electric heating food processing equipment; residential interior decoration; civil air defense engineering design; construction engineering design; electrical installation services; construction engineering construction; installation of protective equipment for civil air defense engineering; and intelligent building system design.