Manufacturing of refrigerators, freezers, washing machines, plastic products, precision welded pipes, refrigeration accessories, packaging products and decorations; sales of self-produced products and raw and auxiliary materials, mechanical equipment, instruments and meters required by the enterprise, department stores, refrigerators, freezers, air conditioners, washing machines, small appliances and household appliances; Technology development, production and sales of water heaters, boilers and auxiliary equipment; sales of household gas instant water heaters, gas wall-mounted rapid heating water heater machine accessories, household gas stoves, water purification equipment, smart luggage and bags; production and sales of electric heating equipment; electromagnetic heating equipment.