It is a small rodent known for its flexible body, keen senses, and rapid reproductive ability. Having sharp front teeth, these teeth will continue to grow, so it is necessary to constantly gnaw on hard objects to grind them. It is a nocturnal animal with excellent hearing and smell, but relatively weak in vision. It is an omnivorous animal with a wide range of food sources. Highly adaptable, able to survive in various environments, from cities to wilderness, from cold regions to tropical rainforests. The reproduction speed is very fast, and a pair of mice can produce a large number of offspring in a short period of time. Plays an important role in scientific research, especially in the fields of genetics and medical research.