Dawan county is rich in blood horses. At that time, the Han Dynasty was at war with the Huns. Emperor Wu of the Han Dynasty wanted a bloody BMW to improve the breed of horses in the Han Dynasty in order to gain an advantage in the battle with Xiongnu. So he sent envoys to Dawan with a lot of gold and silver treasures in exchange for a bloody BMW. The king of Dawan refused to exchange blood horses on the grounds that they were national treasures. In order to maintain the reputation of the Han dynasty, the envoys of the Han dynasty cast a horse with gold for the king of Dawan State.
Emperor Wu of the Han Dynasty was very angry when he heard the news. He sent General Li Guangli on an expedition to Dawan. The Han army besieged the mountain city of Dawan for more than 40 days. Knowing that they were defeated, the nobles of Dawan had to kill the king and make peace with the Han Dynasty. The King of Dawan Kingdom "the North Que hangs his head" is a war caused by blood horses, which is also called "the battle of blood horses" in world history.
The army of the Han Dynasty decisively attacked the Northern Xiongnu, destroyed the country rebuilt by the Northern Xiongnu in Zhi Zhi City, relieved Zhi Zhi Khan and his subordinates from threatening the Han Dynasty, and left a famous saying that "those who openly oppose the Han Dynasty will be punished from afar". This is how the phrase "those who commit crimes against China will be punished if they are far away" circulated on the Internet came from.