Extended data:
Liu Yuzu, the founding emperor of the Southern Song Dynasty, was born in Pengcheng, the hometown of the Song State in the Spring and Autumn Period. Therefore, he was canonized as the King of Song by the Jin Dynasty, and was finally given a Zen position by the Jin Dynasty, with Song as the national title. The Northern and Southern Dynasties are the collective names of the Northern and Southern Dynasties. The Northern and Southern Dynasties were a period of great division in the history of China, and also a period of great ethnic integration in the history of China, connecting the sixteen countries of the Eastern Jin Dynasty and the Sui Dynasty.
In the early Northern and Southern Dynasties, it was clan politics, and the social classes were divided into clans, Qi people, dependent people and slaves. Clans have a large number of families who do not have to pay taxes to engage in production and combat, which has affected the tax revenue of the court.
References:
Baidu encyclopedia-southern and northern dynasties