It depends on how you face the door. Feng shui theory: come straight to the point, you should see that three things are happiness, and you can see the best when you enter the door. In addition, see if it is placed in the front and back of the sofa. If your sofa is east-west, hanging this type of thing can prevent villains.
If you sit west facing east, it is not recommended to use this. Sitting north facing south, hanging the book is prosperous. Sitting south facing north, hanging this is frustrating and not easy. Pure personal opinion, hehe.