1. Garlic is a powerful substance with a fragrant smell that repels hundreds of insects. It also has the magical effect of avoiding ghosts. Westerners even put it together with the cross to avoid ghosts.
2. Because of its reflective effect, mirrors are used by many people as feng shui items to ward off evil spirits. The method of use is to hang them on the lintel or window frame to deal with evil spirits in front of the door. Because of this, it is especially taboo to have the mirror facing yourself when sleeping.