1, the problem of mirroring. There are some ups and downs on the surface of the mirror, which refracts light early, and finally the light that enters the eyes changes from a straight line to a curve, so it looks very thin, which is what the folks call a haha mirror!

2, placement problems, some merchants put the mirror on the ground, but it is not straight, a little oblique, making people look tall and thin. This is the same as looking up on stage.