if you can see it as soon as you enter the door, you can hang it on the plaque at the head. You can also hang it in the living room. People are superstitious, that is, behind the sofa in the living room, they don't want to hang it, saying it's what it is, and it's behind the words, haha. )
Actually, it is a good choice to hang it on the top of the door when you go out.