Because the ancients were the first people to train pigs, pigs have existed for a long time and are the oldest animals. It is often said that these six kinds of animals are prosperous, including pigs. At that time, people ate wild boar, but in winter, wild animals usually don't go in and out of the forest, so people will catch more wild boars before winter comes and feed them. In addition, in ancient times, pigs were considered auspicious animals. In the ruins of Hongshan Culture about 6,000 years ago, it was found to be shaped like a pig, and the dragon was wearing a famous jade pig jade.

Today's dragons are gradually evolved from pig dragons. For a long time, the wildness of wild boar disappeared. Later, the pig's IQ dropped and it became one of the earliest domesticated animals. During the Shang and Zhou Dynasties, metallurgical technology was developed, and a large number of exquisite bronze pigs with different shapes were discovered. Suppose these pigs (with upper openings) are used for drinking glasses. At this time, the pig has become the representative of wealth. After the emergence of the dry calendar, the pig became the last of the twelve zodiac animals, that is, the sea pig. Many parents also expect to have a rich and precious baby pig.

At first, it was thought that domestic pigs in China were domesticated 8,000 years ago. During the period of Cishan site in Wushan, Hebei Province, a large number of complete pig bones were found. Archaeologists and scientists in related fields believe that the remains of pigs are piled up in the bones of pigs, indicating that pigs are used as food. Secondly, most pigs are between one and two years old and are kept in captivity. The degree of tooth decay of pigs is very close to that of domestic pigs dug up in the late Neolithic period. These pigs mainly feed on plants, which is consistent with the type of food provided during artificial reproduction (pigs are omnivorous and also eat meat, especially wild boar).

Later, about 9,000 years ago, archaeologists discovered a large number of pig bones at the Jiahu site in Wuyang, Henan. Scientists adopted a series of standards, such as the comparison of molars, the general shape of teeth, the age of pigs, the food structure of pigs, the proportion of human food (obviously larger than that of wild boar in food) and intimate relationship (which has begun to be buried with pigs), and finally determined that the pig remains in Jiahu site are mainly domestic pig remains. In other words, about 9000 years ago, Jia Hu's ancestors domesticated domestic pigs in China for the first time. The domestic pigs in Jiahu base are also known as one of the earliest domestic pigs in the world.