Why do you say that you are poor? Mainly because, if they are poor families, they have no money to move, and for a poor family, moving does not make much sense, and it may make the family poorer, so everyone will say that they all want to move. It does make sense.
Rich people don't move their graves, which is actually more of China's geomantic theory, because if your family is rich, everyone will think that the geomantic omen of ancestral graves is better. If they move their graves, it may change this feng shui, which will lead to poor peasant women at home. Actually, I think this is a superstition.
So what does it mean to change doors when business is bad? In fact, this is similar to the above, more of a superstition. Ordinary businessmen are superstitious about some geomantic theories for the sake of wealth. They think that the orientation of the gate also has some geomantic sense. If business is bad, you can change your luck by changing doors.
In the long history of China, there are many such folk proverbs. Many of these proverbs do have some truth, even for modern people, they are still meaningful. But some of them are really out of touch with the times, which requires us to choose excellent inheritance and eliminate the bad ones.