In different historical stages, the war between Han and Xiongnu showed different characteristics. Throughout the 400-year war between Han and Hungary, it all ended in the complete victory of Han. People should not only feel sorry for the Xiongnu, a proud nation that once frightened the people of China, but also feel grateful for this disappearing empire, because the disappearance of this empire will eventually keep our Chinese civilization uninterrupted. But has this empire really disappeared? Of course not. Some of them merged with us Chinese people and became a part of Chinese civilization, while others started a long journey to the west. This is another story. In a word, the war between Han and Xiongnu is not the nature of aggression and anti-aggression, but the struggle between fraternal peoples.