When Li Jue and Guo Si were at war, Emperor Xian of Han once escaped from danger. However, after Li Guo joined forces, he continued to hunt down Emperor Han Xian. It was suggested that Cao Cao was able to rescue the Qingzhou Yellow Scarf Army. However, before the messenger came out, the allies had been killed. Seeing that there was no way out, Xia Houdun was ordered by Cao Cao to lead the army to "protect" and achieved success. After that, the founding Coalition was defeated and Cao Cao was sealed. So there is a saying, "Speak of the devil and he will come."