Which direction does the bedside face? Why do you say that?

Under normal circumstances, it is best for the bedside to face north and south, which is in line with gravity. And it is better for our physical and mental health and sleep quality. Moreover, when people are circulating blood, the aorta and aorta run in the same direction as people's head and feet, and the north-south direction also plays a role in disease prevention and health care from the perspective of geomantic omen.