The formation of the Han nationality was formed in a long historical process, and its main name was in the Han Dynasty. Because the Han Dynasty has a long history, it has a great influence on the world. In fact, Han inherited the Qin system, and many factors of Qin developed in Han. When the Qin Dynasty agreed to national reunification and unified the chaotic Warring States into one country, many ethnic groups gradually formed similar ways of thinking with the same characters, coins, weights and measures and the same system, so this was the embryonic form of the Han nationality, and the national identity of later generations continued to increase, eventually forming the Han nationality today.