The history of pigs can be traced back to 40 million years ago, and there are signs that domestic pigs may come from Europe and Asia. Among the fossils found by people, it is proved that animals such as wild boar shuttle through forests and swamps. First of all, wild boar was domesticated in China, and the history of raising pigs in China can be traced back to the early and middle Neolithic period.

According to the records of Oracle Bone Inscriptions unearthed in Yin Ruins, pigs were kept in houses in Shang and Zhou Dynasties. Then, with the development of production, the need to distinguish different pigs gradually appeared. A great creation of pig-raising technology in Shang and Zhou Dynasties was the invention of castration technology.

Extended data

Pig type:

1, large white pig

You Zhu White Pig is called Yorkshire Pig. Originally from Britain, it is specially called "Large White Pig". After being introduced into the Soviet Union, it became a "Soviet white pig" after long-term domestication and cultivation. The latter's body is stronger and stronger than the former, and its limbs are strong and powerful, which is suitable for grazing. It was cultivated in England in the18th century.

2. Yorkshire pig

Yorkshire pig is a famous pig. It originated in Yorkshire, England, an old county in northeast England, and was divided into North Yorkshire, South Yorkshire and West Yorkshire in 1974. It is a hybrid of local pig and China pig.

3. Duroc pig

Duroc pig, also known as "universal pig breed", is native to New Jersey and New York in the eastern United States. Its main parents are new york Duroc pig and Jersey Red pig. Originally called Duroc Ze, later called Duroc. It is divided into American Duroc and Canadian Duroc. Duroc, produced in Taiwan Province Province, China, has cultivated its own style, so it is called Duroc in Taiwan Province Province or Duroc in Taiwan Province Province.