Compared with many museums in China, there are more dry goods here, and there are many knowledges about the development and integration of ethnic groups in the northern region of China. The game of nomadic and agricultural ethnic groups in the cold weapon era is advantageous, so the rule of the Yuan and Qing Dynasty is a historical choice. But in the hot weapons era, the advantages and disadvantages of both sides of the game exchanged venues. Technology dominates the victory of the war. The same is true around the world.