List of high-quality authors The cruelty of the hierarchy of the Yuan Dynasty can be described as unprecedented. During the Yuan Dynasty, the rulers divided the people of the country into four classes according to factors such as status, wealth, and ancestry, namely the Mongols, the Semu, the Han and the Nan. This four-class system made the Mongols the highest class, while the Nan people were at the bottom of society.
What is even more shocking is that the Yuan Dynasty also implemented the "Nine Confucianism and Ten Beggars" system. This system divides intellectuals into nine classes, each with a different social status and treatment. The Mongols and Semu were the ruling class and had the highest status. The intellectuals of the Han nationality are divided into the third class of "Han people", and the intellectuals of other ethnic groups are divided into the fourth class of "southern people". Under such a system, the status and treatment of intellectuals are extremely suppressed and discriminated against, and their living conditions are very difficult.
The four-class system of the Yuan Dynasty not only had a profound impact on politics and economy, but also left a deep imprint on the cultural level. This system has led to huge differences in social status, rights and resource distribution among people at all levels, which has seriously hindered social fairness and progress. 
Now, we should have an in-depth understanding of the four-class system of the Yuan Dynasty and its oppression of intellectuals, so as to better understand history and provide reference for future development.