What civilizations and cultures collided and blended in the Song and Yuan Dynasties?

It can be considered as the collision and blending of farming civilization and nomadic culture; But in essence, it is the collision and blending of multiculturalism.

Liao established by Qidan, Xixia established by Tangut, Jin established by Jurchen nationality and Yuan established by Mongolian nationality. Learn farming, actively restore and develop agricultural production, and promote the development of handicrafts and commerce; Learn from the political system of the Han nationality, imitate the Song system, and establish a centralized administrative organization; Imitate Chinese characters to create characters; Learn the living customs of Han people; Han nationality's contribution to frontier development; All ethnic groups in the frontier moved to the mainland and lived together with the Han nationality; Khitan, Jurchen, etc. Those who first entered the Yellow River basin and merged with the Han people are called "Han people"; Form a new nation-Hui nationality.