According to the principle of the earth's magnetic field, it is best to spread the bed in the north-south direction at home, and people's sleeping heads face north and feet face south, which is beneficial to their health.
The earth is a huge magnetic field, and its magnetic field lines come out from the North Pole and cross the surface of the earth into the South Pole. The biological current channel of human body is perpendicular to the direction of the earth's magnetic field line, and the magnetic force of the earth's magnetic field becomes a resistance of human body's biological current. To restore normal operation and reach a new equilibrium state, it is necessary to consume a lot of calories and improve metabolic capacity. In the long run, when the body can't get enough energy from the outside, the blood circulation will be abnormal and morbid. At the same time, in order to achieve a new equilibrium state, the consumed energy surrounds the bed in the form of heat, which makes the temperature rise when sleeping and makes it difficult to fall asleep. According to this truth, people sleep with their heads facing north and their feet facing south, so that the magnetic field lines can pass through the human body smoothly and the interference of the earth's magnetic field can be minimized. The biological macromolecules in the human body will change from disorderly arrangement to directional arrangement, and the current direction in the human body, that is, the direction of qi and blood movement, is parallel to the magnetic field lines of the earth. The direction of sleep conforms to the magnetic field lines, and under the action of magnetic field forces, qi and blood run smoothly. This sleeping position can reduce people's metabolism and energy consumption, which is beneficial to smooth blood and improve sleep quality.
Second, (by the way) the best sleeping position is lying on the right.