On an evening in the spring of 607 BC, the military camp of Song State was brightly lit and crowded, and the air was filled with the attractive smell of mutton. It turns out that coach Huayuan is rewarding those warriors who can fight with Zheng Jun. Shui Yang, the driver of Huayuan, didn't get mutton, so he hid in the corner of the barracks and chewed dry food alone. Someone saw it and suggested that Huayuan pour a piece of mutton for the sheep. Huayuan curled his lips and said disdainfully, "You can't fight without him!"

Before long, Song Jun and Zheng Jun fought a decisive battle. The two armies are fighting fiercely. Suddenly, sheep poured into Zheng Jun's camp of Huayuan chariot. Seeing that he was about to fall behind enemy lines alone, Huayuan quickly reprimanded the sheep, and then the sheep turned around and said a famous saying that has been passed down to this day: "The sheep in the past were politicians; I am in charge of today's affairs. " It means that you used to be in charge of dividing mutton, but today I am in charge of driving. While speaking, the chariot had rushed into the enemy camp, and Zheng Jun bundled Huayuan in a hurry. Seeing that the coach was captured, Song Jun was in a state of confusion, and immediately fell apart and lost.