During the period from the demise of the Western Jin Dynasty to the reunification of the Northern Wei Dynasty, a major violation of discipline occurred in the Chinese nation, during which a large number of Han people were poisoned. Historically, this incident was called "Five Chaos".

The war in the Three Kingdoms period led to a sharp drop in population and food shortage in the Central Plains. Since then, Cao Cao has gradually sent ethnic minorities to the Central Plains.

In 3 16 ad, after the rebellion of the Eight Kings, the national strength of the Western Jin Dynasty was greatly damaged and was finally destroyed by the Huns. Many Hu people in the north and the western regions took advantage of the chaos in the world to invade the Central Plains on a large scale. Wherever they went, they burned and looted. They call women two-legged sheep. The robbed women commit adultery at night and kill and eat meat during the day.

Under the brutal rule of the Hu people, four or five million Han people were slaughtered in the north alone, resulting in a serious decline in the population of China; In order to avoid slaughter, the remaining Han people built cities to resist the Hu people.

In 350 AD, Ran Min, who was raised by the Hu people, led an army along the Lingshui River, defeated 200,000 Xianbei and seized 28 cities in Xianbei. Subsequently, Ran Min established political power, issued an order to kill Hu, and called on the Han people to take revenge for killing Hu. Han people everywhere responded in succession. Ran Min won ten battles with the teacher of justice. After several wars, he played the prestige of Han Tieqi and recovered a lot of lost ground in one fell swoop.

In 352 AD, Ran Min led an army of 1000 to conquer grain and grass, and was surrounded by an army of Xianbei 1400 and finally killed. Under the threat of force from Ran Minjun and the Han army in the Central Plains, hundreds of thousands of people from siblings, Biandi, Qiang, Xiongnu and Xianbei had to leave the Central Plains.

On the way back, these barbarians attacked each other, robbed each other of food, and even killed each other. There are not many people who can successfully return in the end.

After the five riots, the most brutal Jie people suffered a devastating blow and were extinct; Most of the relatively savage Qiang and Di nationalities were also killed, leaving only a small part to be integrated into the Han nationality.

Xiongnu is a fierce nation in the north. After the war, most of them were driven to Europe, and the Xiongnu basically disappeared from the Central Plains. Relatively gentle Xianbei people took the initiative to learn Chinese culture, and began to gradually integrate into the Han nationality during the Sui and Tang Dynasties.