Which dynasty in China divided people into 4 classes?

When the Mongols ruled China, they divided the people under his rule into 4 classes.

The first class was the Mongols

The second class was the Sermonians, which were the white people of Europe and Central Asia, the Women, the Khitans, and the Dangshangs.

The third is the Han Chinese, is the original female Jin Jin rule of the Han Chinese, as well as a small number of women posing as Han Chinese (not posing back to be killed, not afraid of being killed are the second class).

The fourth class is the southern people, that is, the original Han people under the rule of the Southern Song Dynasty, as well as a small number of other ethnic groups.

However, it should be added that the rules of the time: in the north, the female Zhenzhen speakers were classified in the colorful people, and the female Zhenzhen who could not speak Zhenzhen were placed in the "Han people" in the central plains

These are the first people to be classified as Han people.