1, it is environmentally friendly to decorate the bedroom with plastic gusset plates. This material is toxic and harmful, and there will be no formaldehyde. But now there is an integrated wall made of bamboo, so try not to use it, because plastics are collectively called PVC.
2, that is, pvc boards have basically been eliminated now. PVC is a harmful decorative material. Although it is no problem to use on the ceiling, it will turn yellow and fall off seriously after two or three years of use. Now aluminum gusset plates are basically used. It's not too expensive, and it has a long service life, and it doesn't fall off or change color.