The first Qin dynasty and Qin Shihuang unified the six countries and ended the division of the warring States period;

In the second Western Jin Dynasty, Sima Yan destroyed Wu Dong, ending the division of the three countries (for a short time);

In the third generation of Sui Dynasty, Emperor Wen of Sui Dynasty destroyed Chen Nan, ending the division of the Three Kingdoms, the Jin Dynasty and the Southern and Northern Dynasties.

The fourth Yuan Dynasty and Kublai Khan of Yuan Shizu destroyed the Southern Song Dynasty, ending the division of the Five Dynasties and Ten Kingdoms, Song, Liao, Western Liao, Xixia, Jin and Dali.