Explanation of the method of cutting and installing the lighting house, adjusting or accurate gypsum board lighting shelves for beginners to install the corners of the ceiling and connect them well after cutting the appendages when installing. In this way, the work is fun, easy and accurate to make decoration, gypsum, gypsum board, light house or hidden metal lighting, control of internal and external corners, suspended ceiling or false ceiling, gypsum board or gypsum board, and making secondary ceilings for the latest gypsum decorations