The first reason is that in order to rule the Central Plains, it is necessary to communicate in this area, and how to communicate effectively becomes a problem. Without sinicization, Luoyang in the Central Plains would not have become the political and economic center at that time. After all, there are many Han people in this place. If you want to stand here, do you have to coordinate or communicate with them? Otherwise, without local support, some Xianbei nobles can't stand on their feet.
Secondly, with the moderate strength of the northern minorities, the desire of Xianbei people to move to the Central Plains is getting stronger and stronger, and they need to communicate and integrate with people here. Of course, the number of people under Xianbei increased rapidly. I'm afraid I can't control this place without some cooperation. So sinicization is also a very helpless move. In order to survive better, it is impossible to stand in the north.
The third is the prosperity of religion. The way of life of the nomadic tribes of the northern Xianbei nationality can't adapt in the Central Plains, so it is necessary to change if they want to adapt. Religion played the role of lubricant at this time, reducing the hostility of Xianbei nobles and the rebellious psychology of many people in the Central Plains. In this way, with the sinicization of Xianbei nationality and its integration with Han nationality, the feudal process of northern Wei society was further accelerated.
The sinicization of northern Wei society was mainly forced. What other reasons do you think will lead them to make such a choice?