Light steel keel is a new type of building material. With the development of China's modernization, light steel keel is widely used in hotels, terminal buildings, train transport stations, stations, amusement parks, shopping malls, factories, office buildings, reconstruction of old buildings, interior decoration, ceilings and other places. Light steel (baking varnish) keel ceiling has light weight, high strength, and is suitable for waterproof, shockproof, dustproof, and isolation