The darkest period in China's history was the Five Chaos Period. Due to the brutal rule of the Hu people, the Han people took refuge in the Yellow River basin and entered the Yangtze River basin on a large scale, and established the Eastern Jin Dynasty in the lower reaches of the Yangtze River, which was called Guan Yi Du Nan in history, further strengthening the cultural and economic ties between the Han people in the north and south, Baiyue, Sanmiao and other ethnic groups and the Han people in the Central Plains. At the same time, it was also the first time that China encountered the crisis of national subjugation and species extinction.

After the Eight Kings Rebellion during the reign of Emperor Hui of Jin Dynasty, the rulers were divided, the national strength was empty, the people's livelihood was depressed, and the military strength of the rulers declined rapidly, which was "a great injury to China". The Hu people took the opportunity to rise up and invade the Central Plains, and the Central Plains was in chaos. In more than 100 years, Hu people and Han people have successively established dozens of regimes with different strengths and weaknesses, which are known as the "Five Chaos" in history.

During the Five Chaos Period, China was occupied by foreign countries and the north fell, which had a far-reaching impact on the historical development of China. First of all, it was the first successful foreign invasion of China, and northern China fell. The Five Revolts was the darkest period in China's history. The barbarian conference semifinals have done great damage to Chinese civilization, and China is at a critical moment in history. After the Yongjia Rebellion, the Central Plains fell into war for a long time under the brutal rule of foreign countries, and the people's livelihood economy was greatly damaged and the population dropped sharply. The Jinshi regime went south, built its capital and health, and established the Eastern Jin Dynasty.

During the China Chaos, a large number of Northwest Hu and Northern Xianbei moved into the Central Plains. Jin Ji and Jin Shu recorded that Yongjia was in chaos and there was no one in the Central Plains. In the Book of Jin (Volume 65) and Biography of Wang Dao compiled by the Tang Dynasty, it is said: "Luo Jing capsized, and the women in Zhongzhou avoided the chaos on the left side of the river." In other words, more than half of the people moved south. The Han people who stayed in the north built docks to protect themselves. Wherever the Xiongnu, Jie and other national armies went, the massacre plundered thousands of miles. (For example, the "Huang Hu" Schleswig mentioned in the remnants of Qiu slaughtered hundreds of thousands of people at a time, and there were also a large number of slaughter records in the history of the Jin Dynasty. The slaughter was carried out in several states. ) Shi Hu, nephew of Schleswig-Holstein, was even more cruel.

The gentry, officials, farmers, craftsmen and businessmen who were originally in the Central Plains also fled to the south, which greatly promoted the local economic and cultural development, made the Jianghuai and Jiangnan areas increasingly prosperous, and eventually replaced the Central Plains and became the national economic and cultural center in the Southern and Northern Dynasties.