In the long run, it is generally said that there were five dynasties and ten countries in the Tang and Song Dynasties, which can be collectively called once.
After the Anshi Rebellion, Hexi and Longyou were besieged by Tubo and only recovered in Xian Tong. After the operator, the world was in chaos and the sun was dying. In the first year of God Blessing (904), Zhu Quanzhong moved to Luoyang, Tang Dou. By four years, Li Xun, the mourning emperor, was in Liang and Tang Dynasties and died in 290.
So the pattern of five dynasties and ten countries split began.