This custom originates from a Chinese classic inscribed in "The Book of Gods". There was a driver named Au Minh, passing through Thanh Thao lake was given to a person by the water god, most of them named Nhu Nguyet, after returning home for a few years, Au Minh made a fortune, the family was very rich. One day, on the first day of the New Year, for unknown reasons, Au Minh beat Nhu Nguyet, she was too afraid to hide in the garbage in the corner of the house. Au Minh's wife didn't mean it, so she accidentally swept the whole house with Nhu Nguyet inside and dumped it. Since then, the Au Minh family has become poor again. It is said that Nhu Nguyet is the god of wealth and built an altar. (Perhaps that is why the altar of the god of fortune is often left in the corner of the house.) Since then, continuously handling garbage in the first three days of the year makes people afraid of losing the god of wealth hidden in it, business will not prosper, afraid that maybe the whole year will follow the waste in the house.