R&D, Production and Sales: Energy-saving and environmental protection equipment, energy-saving and environmental protection air conditioners, energy-saving heaters, air conditioning equipment accessories, evaporative air coolers, cooling water curtains, fans, air purifiers, heating and dehumidification equipment, electromagnetic energy-saving water heaters, steel materials, adhesives (excluding hazardous chemicals), paper products, hardware, and general machinery equipment; Import and export of goods or technologies (excluding those prohibited by the state or requiring administrative approval). (Business activities must be approved by relevant departments before operation as required by laws and regulations. )