Why can't the mirror face the bed in Feng Shui? If so, what are the solutions?

In geomantic omen, the mirror is used to ward off evil spirits, and should face the direction in which evil spirits come; It can't rely on the bed to ward off evil spirits. The mirror, especially the big mirror, is facing the bed. Get up at night, people are in a daze and the lights are dim. Seeing yourself in the mirror or the furnishings at home is easy to create illusions and scare people. So don't point the mirror at the bed.