During the Warring States period, the army of Qin surrounded Handan, the capital of Zhao, and the situation was very critical. Cheng Xiao, the king of Zhao, sent Ping Yuanjun to Chu for help. Pingyuan intends to lead 20 public tourists to complete this task. 19 of them have been selected, but one of them is still uncertain. At this time, he volunteered to go, Ping Yuanjun with a grain of salt, reluctantly took him to Chu.

When Ping Yuanjun arrived in Chu, he immediately talked with the king of Chu about "assisting Zhao", but the conversation was fruitless for a long time. At this time, Mao Sui said to the king of Chu: "We came to ask you to send reinforcements today, but you didn't say a word, but you should not forget that although Chu has many soldiers, it has been defeated and fought many times, and even the country has been lost." In my opinion, Chu needs to unite against Qin more than Zhao! " Mao Sui's words convinced the king of Chu and immediately promised to send troops to help Zhao.

When Ping Yuanjun returned to Zhao, he said with emotion: "When Mr. Mao arrived in Chu, Chu was more important than Jiuding Road." Jiuding Dalu: Together with Ding, it is a treasure of an ancient country. )

The idiom "It's a deal" comes from this story, and describing a sentence can play a very important role.