In ancient times, bats were called mouse immortals, and bats were regarded as mascots among the people. "Bat" and "Fu" are homophonic, and bats mean great happiness and good luck. When bats fly into the house, it means that happiness is welcome and in sight.

Sometimes bats may fly in by mistake because they prey on insects, because bats rely on ultrasound to tell their direction. It doesn't fly home for no reason. However, some bats will nest at home for reasons of room type or home environment, so everyone must be careful.