In 570 AD, the emperor lost his virtue, disasters came from heaven, treacherous ministers were in power, the people were in dire straits, and uprisings continued in various places. In the next 50 years, the northern and central plains experienced changes in political power, and the situation was changing. The folk song in the countryside said, "Ten years, one country."
With the Mei River and Mei Mountain as the boundary, the south was also divided into vassal towns. Finally, in 579 AD, the three families of Xia, Yun and Nan established themselves as kings. The three political parties stood side by side and competed with each other. The north and the south were also in peace.
Among them, Xia Yan established the Xia Kingdom. Taking advantage of the natural dangers in the southwest, he defended Zizhou and had strong military strength.
Yun Tang established the Yun Kingdom and relied on the rich products and developed handicraft industry in the southeast to secure Jinling...
