How to fix the felt board on the wall

Fix it. Baidu Encyclopedia says that felt boards are all nailed up, but before nailing the felt, a piece of iron sheet should be attached under the felt, so that the paper can be pressed with a magnetic stripe to draw. Felt board is a plate-like material made of some fiber materials by mechanical processing, chemical treatment or hot pressing. Felt board has high sound absorption, heat insulation and shock resistance.