Let's start with the first one in scientific terms. In other words, the earth rotates from west to east. It is best to sleep with the head facing west and the tail facing east, so that you can sleep comfortably. I still listened to my geography teacher in high school for this reason. He said that only in this way will it be more conducive to health, because if you face east, you will feel very tired after sleeping. Especially teenagers with long body cycles, if their heads are in the East, they will develop worse than those in the West.
Secondly, if your room has exposed windows, it is better for your bedside to lean against the wall instead of the French window. According to Feng Shui, you have to lean against the wall to feel "backed by mountains" and sleep more stably. The scientific theory is that if you lean against the glass wall, sometimes the curtains are not closed, and the sun will be very strong. Another point is that if the glass wall happens to meet the cleaning staff washing the glass, I wake up and suddenly see it. It's really a horror movie, a nightmare! !
The third is that the bed should not be in front of the mirror, must not be placed at the end of the bed, and the sides of the bed should not face the bed. Mr. Geography explained that if you face the bed, another world in the mirror will pull you in at night, which will lead to poor sleep and affect your health. In fact, this is very clear when you think about it. The mirror will show a portrait. If you want to go to the toilet, when you go, you will be scared to see yourself in the mirror. So, if your vanity mirror is in these positions, you'd better pay attention to the bed. If you really can't fit it, you can also cover the mirror with a cloth before going to bed.
Fourth, the position of the bedside is very reluctant to be placed south. This is because when we die, if we stop, the coffin head must face south. So people usually don't like sleeping facing south.
I would like to add here that many people will partition their houses into small single rooms now, but if they have a choice, it is best not to choose to sleep in the partition room of the living room. This statement is the same as the fourth point, because in ancient times, people died in the hall, so if they are alive, they don't like to sleep in the hall for a long time.
Superstition is becoming less and less credible, but a famous archaeologist in history once joked that he slept with his head facing south like a corpse. As a result, not long after returning to China, he really fell ill and died. Therefore, it is unscientific to say "believe" in metaphysics, but it seems to be true.