It is a light-weight and high-intensity building material which is characterised by convenience in construction, great performance for processes like sawing, nailing without being warped or cracks. In addition, the surface of the boards can be painted or covered with tile or wallpaper, not afraid of insects and not self-heating. The product has great thermal insulation, sound insulation, and endurance for temperature change, so it meets the working requirements of building construction, especially with it's good fire proof, explosion proof, and no emission of noxious fumes.