2. If it weren't for the houses in the rich courtyard, the houses of the ancients were basically thatched huts, which leaked air and rain all the year round, especially in winter. The north wind whistling, cold air passing through the hall, sleeping with your head facing north, is to actively let your head accept the erosion of cold air, and the quality of sleep is naturally not good. In the eyes of the ancients, the head is the place where the yang meets. A lot of cold erosion will dispel the yang in the head, weaken the yang in the body and affect longevity.
Up to now, people in China still believe in Feng Shui. The house faces south, and the windows face south, so that the yang can enter the bedroom. Sleeping with your head facing north, your feet will face the window directly, and you will absorb more cold, which is not good for your health. At dawn, the sun will shine directly on the face through the window, which will also affect sleep. Big cities are often brightly lit, and it is inevitable that all kinds of lights will flash at midnight. Sleep with your head facing north to the window. Even with curtains, strong light will interfere with sleep. It is obviously not advisable to sleep with your head facing north. Even for the sake of sleep quality, you should not sleep north.
4. If the proverb "Can't sleep in the north" is put in the complete sentence "Can't sleep in death, can't sleep in the head, can't sleep in the north", it will be considered superstition. The whole sentence also comes from superstition. After death, people lie face down, cover their faces with white cloth, and face north when buried. This leads to the saying that you can't sleep on your back, cover your face with a quilt, or sleep with your head facing north.