It is a common domestic animal belonging to the mammalian order Artiodactyla, family Pig. It is widely loved by people for its round body and adorable appearance. It is an omnivorous animal that can digest various foods. It has strong reproductive ability and can give birth to multiple piglets in one litter, making it an important economic animal. It has a long history in human society, not only as a source of food, but also holds a special position in many cultures. For example, in Chinese culture, pigs symbolize wealth and good luck. Strong adaptability, able to survive in various environments. The raising of pigs also promotes the development of agriculture, as they can utilize agricultural by-products as food.