This historical story happened in the Spring and Autumn Period. Qin and Jin are two neighboring countries, so they are willing to help each other. At the beginning, Qin was very kind to Jin, and Jin saw that you were so sincere. At that time, Jin Xiangong betrothed his daughter to Qin Mugong of Qin. Later, civil strife broke out in the State of Jin, and Jin Xiangong's two sons, Yiwu and Zhong Er, escaped from the State of Jin and waited for the opportunity. Later, when Jin Xiangong died, I promised Qin Mugong that I would give up five cities if I helped him get the power of the State of Jin.

After Qin Mugong helped him, Yiwu, in turn, not only refused to give the five cities to Qin, but also sent troops to attack Qin when it was in danger. But I can only say that Yiwu, that is, Jin Gonghui, was unlucky and was captured by the State of Qin. At this time, Qin decided to release Jin Yima, the two sides discussed, and finally left the prince in Qin as a hostage. After Kim returned, he ceded the city.

Later, in order to win the state of Jin, Qin Mugong married his daughter and visited five cities. In this way, the relationship between the two sides can be described as brotherly, but things still happened. Jin died suddenly, and the king of Qin sneaked back to Jin to compete for the throne. Qin Mugong, a good man, finally got angry and decided to help Zhong Er, who was wandering outside, win the State of Jin and send troops to escort him. Finally, Zhong Er succeeded in becoming the king of the State of Jin. Qin Mugong also married his daughter to Zhong Er, which deepened their relationship.

Zhong Er is not a man who bites the hand that feeds him, so the relationship between the two countries has finally returned to the former state of reconciliation. Therefore, we now call the marriage between the two families the beauty of Qin and Jin, and it is really rare for the two countries to reconcile in this story.