As for the azimuth direction, there are eight directions: east, south, west, north, southeast, northeast, southwest and northwest. From the perspective of geomantic omen, the most correct sleeping direction is that the head faces east and the purple gas comes from the east.
The east is where the sun rises, with its head facing the east. The energy of the sun will enter the body from the head and reach the soles of the feet, making it full of strength, keeping a clear head, keeping the soles warm and not easy to get sick.
The ancients said that a day's plan lies in the morning, which is the reason.