During the Warring States Period, the King of Chu went hunting with his entourage. At lunch, he untied his bow and arrow from his waist and put it on the ground. After eating and drinking enough, everyone got up and hurried on, but forgot to bow. In this way, he walked forward for more than twenty miles, and the king of Chu found that his bow was gone. The general bow is just upside down, but this kind of bow is made of the best materials and the king of Chu likes it very much. His followers were so scared that they planned to search all the families in Fiona Fang Wuli and ask a clear question. The king of Chu said, "The king of Chu kept the bow, and the Chu people got it. Keep the change! " It means that the king of Chu lost his bow, but the Chu people also found it. Forget it.

The story soon spread, and everyone praised the king of Chu as a gentleman with a broad mind. This incident also reached the ears of Confucius, who smiled and said, "Everyone in the world can have it, so why talk about Chu?" It means that everyone in the world can get it. Why must it be Chu's? Change "the king of Chu keeps a bow and the Chu people get it" to "the Chu people keep a bow and the Chu people get it." Laozi simply changed it to "keep it, get it." Later, people simplified this allusion to a four-word idiom-Gong Chu Chu De.

This sentence is now generally used to refer to the fact that fat water does not flow out of the field.