Because the god of wealth means turning money into treasure, if there is a crack in the corner of the room, which symbolizes that the backer is damaged in geomantic omen, or the floor of the house is ceramic tile, there can be no crack, because if the god of wealth sees it, it will affect the wealth of the whole family and there will be signs of breaking it. The answer is for reference only, please don't be blindly superstitious.
The God of Wealth is the God in charge of the world's financial resources in China Taoism.