I heard from many people that doors to windows are said to be a source of wealth loss. It can be speculated that if a person stays in a house with four ventilated walls, especially if the door faces the window, there will definitely be draft. This is obviously a very powerful wind, especially in ancient times when the doors and windows were not tightly sealed. People with crooked mouths and slanted eyes can also harm their health, so they cannot sleep in windy places. This is common sense as we know it now.