Square board smallpox has a good overall flat effect, with the surrounding environment dissolved into one, make people produce pure natural feeling. Both the square plate and the dark frame square plate are made of high quality and high strength aluminum alloy plate. The structure is mainly composed of square plate, triangular keel or T bone. The commonly used thickness is: 0.4-1.0mm, width is: 300, 600, 400, 500, length is: 300, 600, 1200, 400, 500. The surface of square board ceiling can be treated by powder spraying or polyester roller coating. The color of layer is rich, light weight, waterproof, antifouling, fireproof, low maintenance cost and long service life. Square board ceiling can meet the use requirements of different occasions with various specifications. The square ceiling application scope is suitable for the decoration of the lobby and corridor of the airport, guild hall, subway station, hotel, etc..