On one occasion, Cao Cao led a crusade against Liu Bei. If you get off to a bad start, you can't win many battles. Retreat and fear of being laughed at. You can't enter if you want, but you don't want to retreat. In a dilemma, while hesitating, the chef sent a bowl of chicken soup. Cao Cao was deeply touched when he saw chicken ribs in the soup. Just then, his goalkeeper Xia Houdun came in and asked for the password at night. Cao Cao casually replied, "Chicken ribs! Chicken ribs! " So Xia Houdun handed down the password. Hearing this password, Yang Xiu ordered his sergeant to pack up and prepare for his return trip. Xia Houdun was surprised when someone reported it. Hurriedly put Yang Xiuzhao in the account. Ask him why he packed. Yang Xiu said, "Give the order tonight, and Wang Wei will withdraw his troops in a few days. Chicken ribs, eat no meat, throw them away. If you can't win today, it's no use returning it for fear of jokes. Better come back early: tomorrow you will start your division of labor. So pack your bags first, so as not to panic when you leave. " Xia Houdun said quickly, "You are really Wang Wei's confidant!" Start packing. So all the generals in the village are ready to return to the plan. That night, Cao Cao was flustered and couldn't sleep well, so he took a steel axe and bypassed it privately. I saw the sergeant in Xia Houdun Village preparing his luggage. Cao Cao was so frightened that he called Xia Houdun back to his account and asked him. Xia Houdun said that Yang Xiu, the main book, guessed in advance that Cao Cao wanted to come back. Cao Cao immediately called Yang Xiu out to ask, and Yang Xiu answered with the meaning of chicken ribs. Hearing this, Cao Cao was furious: "How dare you spread rumors and confuse our army!" The man who drank the knife and axe pushed out the beheader, nodded his head and sent it outside Yuanmen. Yang Xiu was clever all his life, but he paid the price of his life.