Don't be too dark in the master bedroom. Although geomantic omen says "bright hall and dark room", if the room has no windows or is too small, there will be no convection in the air and sunlight will not easily enter, resulting in insufficient yang and imbalance between yin and yang. Qi stagnation can easily lead to headache, dizziness and bad temper.
Toilets are places where dirty air is produced. Generally speaking, the bathroom can't be located in the center of the whole house, let alone facing the master bedroom door, or the bedroom is under the bathroom. Living here for many years will cause the owner's illness.