General Projects: Import and export of goods, Technology import and export, Import and export agent, Food import and export, Home appliance installation services, Refrigeration、 Air conditioning equipment manufacturing, Refrigeration、 Air conditioning equipment sales, Sales of solar thermal products, Solar thermal equipment sales, Machinery and equipment rental, Mechanical and electrical equipment manufacturing, Mechanical and electrical equipment sales, General equipment manufacturing( Excluding special equipment manufacturing), General equipment repair, Sales of special electronic materials, Gas compression machinery sales, Gas compression machinery manufacturing, Special equipment sales, Professional cleaning、 Cleaning、 Disinfection services, Manufacturing of special electronic materials, Safety and technical training for special operations personnel, R&D of special electronic materials, Electronic special equipment manufacturing, Sales of special electronic equipment, Research and development of waste heat, waste pressure and waste gas utilization technology, gas、 Liquid separation and purification equipment manufacturing, gas、 Liquid separation and purification equipment sales, Manufacturing of special equipment for environmental protection, Sales of special equipment for environmental protection, Valves and plugs sales, Plastic product manufacturing,Valve and plug development, Engineering and technical research and experimental development, Emerging energy technology research and development, Sales of thermal and acoustic insulation materials, Cooling services, Spraying processing, Technical Services、 Technology Development、 Technical Consulting、 Technical Exchange、 Technology Transfer、 Technology Promotion, Engineering Management Services, Software Development, Industrial automatic control system device manufacturing, Sales of industrial automatic control systems。( In addition to licensing business, Able to independently operate projects that are not prohibited or restricted by laws and regulations) Licensed Projects: Special equipment design, Gas burner installation、 repair, Disposal of waste electrical and electronic products, Road transport of dangerous goods, Special equipment inspection and testing, Water transport of dangerous goods, Construction project construction, Construction Engineering Design, Electrical installation services, Installation, modification and repair of special equipment。( Projects that require approval according to law, Business activities can only be carried out after approval from relevant departments, The specific business projects are subject to the approval documents or licenses of relevant departments.)