Measure the length and width of the room and determine the length and installation direction of the gusset plate.

Reserved lines for lighting, yuba and exhaust fan.

Determine the ceiling height and find the surrounding horizontal line.

According to the height of the edge keel.

Make the whole skeleton with the main keel and the auxiliary keel.

According to the determined vertical and horizontal direction of PVC board, one side is reserved, and the other three sides are fixed with structural adhesive and self-tapping.

Starting from the corner side, install and fix it block by block horizontally until the last block (pay attention to lead out all kinds of wires at the predetermined position, do a good job in bracket installation, or install lamps directly).

Use wallpaper knife to cut the last corner to the part that should be hidden in the gusset plate, and install it in the predetermined position with structural adhesive.