Bat, also known as _ _ (homophonic with "professional ink"), is the general name of Chiroptera, and it is the second largest class of mammals after rodents. There are 962 existing species, belonging to 19 family 185 genus, which are distributed all over the world except some islands in the polar regions and oceans. Bats are the only mammals that can fly. Bats are often negative in cultures all over the world. Only in the culture of China, they are regarded as auspicious because their pronunciation and shape are similar to that of "Fu", as opposed to owls.