What is the emphasis on the placement of beds in the room in Feng Shui?

It is generally believed that the bed should be placed in the north-south direction, because the geographical magnetic field is in the north-south direction, ensuring that the sleeping direction of the human body is consistent with the direction of the magnetic field lines can make people fall asleep more easily. In addition, as long as the bed is not close to the window, the door is not facing the mirror, and the head of the bed is close to the solid wall, and there is no beam to support it.