Xia and Shang Dynasties, Western Zhou Dynasty and Eastern Zhou Dynasty are divided into two parts.

Spring and Autumn and Warring States unified Qin and Han Dynasties;

Three points in Wei Shuwu, before and after the Second Jin Dynasty;

The Southern and Northern Dynasties coexisted, and the Sui, Tang and Five Dynasties passed;

After Song, Yuan, Ming and Qing dynasties, the imperial dynasty ended here.

The second type:

Tang Yao, Yu Shun, Xia, Shang and Zhou Dynasties, Spring and Autumn Period and Warring States Period,

Qin, Han and Jin dynasties were unified, and the southern dynasties and the northern dynasties were rivals.

Sui, Tang, Five Dynasties and Ten Kingdoms, Song, Yuan, Ming and Qing emperors rested.