Why was the Wei, Jin, Southern and Northern Dynasties called the Chinese version of the Middle Ages?

The Wei, Jin, Southern and Northern Dynasties was a very important period in Chinese history. The reason why it was called the Chinese version of the "Middle Ages" mainly included the following aspects: 1. Social unrest: During the Wei, Jin, and Southern and Northern Dynasties, social unrest and frequent wars and political changes made social order chaotic and people's lives difficult. During this period, there were also some unique cultural phenomena such as poetry, literature, philosophy, etc. These cultural phenomena also appeared in medieval Europe. 2. Religious development: During the Wei, Jin, and Southern and Northern Dynasties, religious development was also very active. Buddhism was widely spread during this period and many important Buddhist philosophers appeared, such as the Zen masters of the Wei, Jin, Southern and Northern Dynasties. In addition, Taoism also developed further during this period. 3. System change: The political system of the Wei, Jin, Southern and Northern Dynasties underwent major changes. The Wei State established by Cao Cao and Cao Pi implemented a feudal system. After that, the political system of the various dynasties in the Northern and Southern Dynasties gradually inclined towards a central system. These system changes also occurred in the Middle Ages in Europe, so the Wei, Jin, Southern and Northern Dynasties could also be regarded as the Chinese version of the Middle Ages. 4. Floating population: During the Wei, Jin, Southern and Northern Dynasties, the population was very mobile. Many people moved from the Central Plains to the south and west. The movement of these people led to social and cultural changes and also promoted economic development. Although the Wei, Jin, Southern and Northern Dynasties had some similarities with medieval Europe, their social, cultural, political, and economic development were very different. Therefore, it was very appropriate to call it the Chinese version of the Middle Ages.