Undertake a project: Ventilation: sales of various types of wind turbine cabinet, purifiers, air valve, water-cooled new fans, air conditioning and fan coil 2: Ventilation: various exhaust hood, stainless steel hoods, exhaust pipes, barbecue smoke, ventilation pipes, central air conditioning insulation, plant smoke dust, fresh air system. 3: Purification Project: Catering fume purification construction and testing, plant welding smoke and dust emissions and noise silencer. 4: Air Conditioning Engineering: large and small central air conditioning design, installation, maintenance and fluoride transfer machine, fan coil construction and installation of central air-conditioning water system cleaning coatings, water system installation 5 Steel Works: indoor and outdoor steel construction, structural door first villa add layers of indoor and outdoor steel ladders outdoor billboards, stainless steel, light steel housing, glass roof construction.