Please talk about the impact of the wars in the Three Kingdoms, Two Jins, Southern and Northern Dynasties on society.

1. The population dropped sharply. At the end of the Eastern Han Dynasty, the population was 56 million, and a large number of people were concealed by powerful landlords.

During the Three Kingdoms period, the total population of Wei, Shu, and Wu was probably only over 7.6 million.

The peak period of the Sui Dynasty had just returned to 8.9 million households, with a maximum of more than 30 million households. There was another great chaos in the early Tang Dynasty. During the rule of Zhenguan, the population was only one-third of the population in the fifth year of Emperor Yang of the Sui Dynasty (609). The Tang Dynasty had to wait until the Tianbao period in 754 to recover and surpass the population at the peak of the Sui Dynasty.

2. The integration of ethnic groups is not only the Wuhu, but also the integration of many foreign ethnic groups with the Han in the southwest, northwest, and northeast. Culturally, the Han people have absorbed many national advantages, and the Han people's living customs have also undergone great changes, such as Hu stool, Hu Qu, and Hugua. . . . . . . . And nationalized

3. The disintegration of the family hierarchy and the rise of the imperial examination system gave social classes the opportunity to move up and down.