Cao Cao sent troops to attack Liu Bei in Hanzhong, and was trapped at the border of the oblique valley. He wanted to join the army, but Ma Chao refused to stay. He wanted to withdraw his troops and return to Korea, but he was afraid of being laughed at by the Shu soldiers. He hesitated and met the chef with chicken soup. Cao Cao felt pregnant when he saw chicken ribs in the bowl. Is thoughtfully, Xia Houdun enter an item in an account, please night slogan. Cao Cao casually replied, "Chicken ribs! Chicken ribs! " Dunchuan ordered all officials to call it "chicken ribs!" Yang Xiu, the marching master, saw the word "chicken ribs" and taught the accompanying sergeant to pack up and prepare for the return trip. It was reported that Xiahou had rebelled. Surprised, Dundon asked Yang Xiu to settle accounts and asked, "How do you pack things?" Xiu said, "Give the order tonight, and we can see that Wang Wei will withdraw his troops in a few days. Those who have chicken ribs will eat without meat and abandon them. If you can't win today, it's no use returning it, for fear of being laughed at. Why don't you come home early? Wang Wei will be transferred tomorrow. So pack your bags first, so as not to panic when you leave. " Xia Houdun said, "Wang Wei's heart is well known!" So I packed my bags. So all the generals in the village are ready to return to the plan. When Cao Cao learned of this situation, he called Yang Xiu to ask him and made a gesture of "chicken ribs". Cao Cao was furious and said, "How dare you spread rumors and disturb our army!" Those who drink knives and axes, push them and cut them, so that their heads are outside the iron gate.