In March of the eighteenth year of Yongping, the Northern Xiongnu were unwilling to lose the Western Regions, and the Xiongnu Beidan Yu defeated the Cheshi tribe between the Han and the Xiongnu with 20,000 cavalry, and the Cheshi King was killed. Immediately, the Huns sent three roads, when the defenders of Jinman City only had hundreds of people and there was no danger to defend, the situation was in crisis, Geng Gong climbed the wall to command the battle, fought in the rain, repelled the Huns, and after breaking through, he led the officers and soldiers to Shule City, Shule City was dangerous, and there was a water source, and decided to hold on to Shule City to wait for help. ...... June of the same year, the entire army of Chen Mu, the capital of the Western Regions, was annihilated, and Guan Pet was also surrounded in Liuzhong City. The power of the Han Dynasty in the entire Western Regions was in chaos. This article is based on the sudden changes in the situation in the Western Regions before and after the bloody battle of Shule City, Li Tong took advantage of the situation to emerge, he led the Han people in Tuntian to rescue the Han army in various places, and at the same time gathered the remnants of the Han army to hold the Western Regions, united all ethnic groups in the Western Regions, and created a magnificent history of the Western Regions war of the Han iron-blooded soldiers in the intricate environment.