The last post was edited by Gaoji International at 20 12-7- 16: 03. A 220V power cord should be reserved on the top surface, and a tri-squint 10A socket panel should be prepared. Corresponding wall switches shall be reserved on the wall surface. 2. Make a keel (wooden keel or light steel keel) with a height of more than 8CM on the top surface in advance. 3. After the keel is laid, the ceiling materials (such as gypsum board) that need to be installed with optical fibers should not be put on first, but putty should be put on the ground first, and optical fibers should be installed on site. Don't batch gypsum board flat-fell seam with a width of about 5CM, and then fill it after gypsum board is installed on the ceiling. 4. The optical fiber starry sky is installed on the gypsum board on the ground by the optical fiber starry sky installer. After the ground installation is completed, the carpenter will install the corresponding gypsum board and fix it on the ceiling keel. 5. After the ceiling is installed, the painter will fill all the joints of the gypsum board, and can spray paint or paint as needed. After the paint or coating dries, the excess optical fiber will be cut flat, which is more effective. 6. The light source generation and control system should be installed in a ventilated, dry and easy-to-maintain position on the ceiling. If the ceiling is fully enclosed, a manhole should be opened at an appropriate position in the ceiling to facilitate the placement and maintenance of the control device.