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.
1. During the Northern Dynasties, the regime of the Northern Dynasties was generally established by ethnic minorities, which was called the "Five Revolt", and some of the Five Dynasties and Ten Countries were also established by ethnic minorities. Jin, Xixia and Liao, which stood side by side with the Song Dynasty, were also minority regimes. In addition, the Yuan Dynasty was founded by Mongols, and the Qing Dynasty was founded by Jurchen, that is, Manchu.
2. The Qin Dynasty ended the division from the Spring and Autumn Period to the Warring States Period to achieve national reunification, the Sui Dynasty ended the division of the Northern and Southern Dynasties, the Song Dynasty ended the division of the Five Dynasties and Ten Countries and basically achieved reunification, and it was not until the Yuan Dynasty that it was truly unified.