Metaphysics believes that if the pots and pans, chopsticks and leftovers left over for the night are not cleaned up, they will attract hungry ghosts wandering for food, bring bad luck to the family and upset the people who hit them.
However, these are unsanitary and superstitious. They don't wash dishes after meals, but prepare meals for ghosts.
These are all feudal mysteries. This is the age of science and technology. We should believe in science more, and we can't live completely in the age of feudal mysticism, otherwise we will become more and more degenerate over time.