From the second material, we can see the function and influence of ancient China immigrants.

Material 2: Murong in Xianbei originally lived in Xianbei Mountain ... In 289, Murong led his troops to Tuhe (now Yixian, Liaoning Province), and soon moved to Dajicheng (now Jinzhou, Liaoning Province) to engage in farming, mulberry and animal husbandry. After Yongjia, a large number of farmers in the north flowed into Murong Department, and many scholars took refuge. ..... In the process of the gradual feudalization of the Hu nationality in China, the Hu nationality not only absorbed many feudal cultures of the Han nationality, but also influenced the Han nationality with its own cultural customs. ..... The Han people near the Hu people's area are even influenced by the Hu people in production, engaged in animal husbandry or engaged in animal husbandry.

── Excerpt from Jian Bozan's Outline of China History.

Immigration is conducive to the exchange and common development of all ethnic groups.