From the perspective of geomantic omen, this is to make the people living in it rich and harmonious, because it is actually a feudal superstition. There is no scientific basis for this, but there is good hope for the future. Just like some people throw their teeth under the bed or on the roof. This is actually the saying that the older generation was bewitched by those demigods.
Cleaning houses is a tradition of China people, but with the changes of the times, some things have become indifferent, and the methods of cleaning houses are gradually lost. In real life, many people no longer pay attention to or don't understand the ceremony of cleaning houses. Whether it's moving, watching feng shui, exorcising evil spirits, setting up a church, etc. It is necessary to clean the house.