The Romance of the Three Kingdoms, written by Luo Guanzhong, a writer of the Ming Dynasty, is the first time: "It is said that the general trend of the world will be combined for a long time, and it will be combined for a long time. At the weekend, the seven countries divided and ruled and merged into the state of Qin. After the Qin Dynasty was destroyed, Chu and Han contended and merged into Han. In the Han Dynasty, Emperor Gaozu rebelled against the White Snake and unified the whole country. Later, martial arts flourished and spread to Xian Di, divided into three countries. "

China historians generally believe that China's national movement is "divided for a long time, divided for a long time, the dynasty (the regime that unified the country for less than a hundred years is called" generation ",and the regime that unified the country for more than a hundred years is called" DPRK ") is unified, and the country (the country has no political power during the unified period) is divided." That is to say, go back and forth in the order of "Chao-Lie-Dai-Chao-Lie-Dai".

For example, the Zhou Dynasty (276 years before the unified time 1046- 770)-the Spring and Autumn Period and the Warring States Period (770- 22 1 year before the separatist regime, 529 years)-the Qin Dynasty (221-2007 before the unified time, 65,438 years). A total of 4 years)-Han Dynasty (unified time 202 BC-220 AD, a total of 422 years, in which "Wang Mang usurped Han" changed "Han" to "Xin" as emperor in 8-23 AD, The unification time of the Han Dynasty was actually 407 years)-The Three Kingdoms, the Northern and Southern Dynasties (the separatist time was 220 AD) was 36 1 year)-The Sui Dynasty (the unification time was 58 1-665438+ the unification time of the Tang Dynasty was actually 275 years)-The Five Dynasties and Ten Kingdoms (the separatist time was 907-979, and the separatist time was 907-979. A total of 300 years)-Yuan Dynasty (unified time is 1279-65438), a total of 89 years)-Ming Dynasty (unified time 1368-65438) ......