Sleep with your head facing north and your feet facing south.

Sleep with your head facing north and your feet facing south. Is to conform to the earth. The north and south of the earth are attractive. There is geomagnetic force, so people have the best beds. Sleeping in the north and south is more scientific. In this way, the magnetic force of the earth is better for the human heart. That thing has no magnetism and is easy to disturb people's hearts. Especially people with heart disease should, uh, sleep in the north and south. This is also the scientific reason why ancient people stayed.