In the Spring and Autumn Period, when Jin Xiangong wanted to expand its own strength and territory, it made excuses to say that the neighboring Guo (guó) countries often violated the border of Jin State and wanted to send troops to destroy Guo State. However, there is a state of danger between the State of Jin and the State of Guo, and a crusade against the State of Guo must go through the dangerous land. "How can we successfully pass the state of Yu?" Ask Jin Xiangong's ministers. Doctor Xun Xi said, "The king of Yu State is a short-sighted man who covets small profits. As long as we give him priceless jewels and BMW, he will not refuse to borrow." When Jin Xiangong was a little reluctant to listen, Xun Xi saw Jin Xiangong's thoughts, and said, "The two countries are close neighbors as close as lips and teeth. When the state of Guo is destroyed, the state of Yu can't live alone. Your beautiful jade BMW is just temporarily stored in the state of Yu." Jin Xiangong adopted Xun Xi's plan. When Yu Guojun saw these two precious gifts, he immediately became elated. When he heard Xun Xi say that he wanted to borrow from Yu State, he readily promised to come down at that time. After hearing this, Gong Zhiqi, the doctor of the state of Yu, quickly stopped him, saying, "No, no, the state of Yu and the state of Guo are close neighbors as close as lips and teeth. Our two small countries are interdependent, and we can help each other with something. If the state of Guo is destroyed, our state of Yu will be in danger. As the saying goes:' Lips die and teeth are cold', without lips, teeth can't be saved! It is absolutely forbidden to lend the road to the state of Jin. " Yu Gong said, "The State of Jin is a big country, and now it's specially sent Mei Yu BMW to make friends with us. Can't we borrow a road to let them walk?" Gong Zhiqi sighed repeatedly, knowing that the state of Yu was not far from the end, so he left the state of Yu with a family. Sure enough, the army of the State of Jin wiped out the State of Guo by means of the State of Yu, and then seized the Duke Yu who personally greeted the State of Jin and wiped out the State of Yu. The story comes from "Zuo Zhuan Xi Gong Five Years". The idiom "the lips die and the teeth are cold" means that the two sides are closely related and interdependent.

In the Spring and Autumn Period, when Jin Xiangong wanted to expand its own strength and territory, it made excuses to say that the neighboring Guo (guó) countries often violated the border of Jin State and wanted to send troops to destroy Guo State. However, there is a state of danger between the State of Jin and the State of Guo, and a crusade against the State of Guo must go through the dangerous land. "How can we successfully pass the state of Yu?" Ask Jin Xiangong's ministers. Doctor Xun Xi said, "The king of Yu State is a short-sighted man who covets small profits. As long as we give him priceless jewels and BMW, he will not refuse to borrow." When Jin Xiangong was a little reluctant to listen, Xun Xi saw Jin Xiangong's thoughts, and said, "The two countries are close neighbors as close as lips and teeth. When the state of Guo is destroyed, the state of Yu can't live alone. Your beautiful jade BMW is just temporarily stored in the state of Yu." Jin Xiangong adopted Xun Xi's plan. When Yu Guojun saw these two precious gifts, he immediately became elated. When he heard Xun Xi say that he wanted to borrow from Yu State, he readily promised to come down at that time. After hearing this, Gong Zhiqi, the doctor of the state of Yu, quickly stopped him, saying, "No, no, the state of Yu and the state of Guo are close neighbors as close as lips and teeth. Our two small countries are interdependent, and we can help each other with something. If the state of Guo is destroyed, our state of Yu will be in danger. As the saying goes:' Lips die and teeth are cold', without lips, teeth can't be saved! It is absolutely forbidden to lend the road to the state of Jin. " Yu Gong said, "The State of Jin is a big country, and now it's specially sent Mei Yu BMW to make friends with us. Can't we borrow a road to let them walk?" Gong Zhiqi sighed repeatedly, knowing that the state of Yu was not far from the end, so he left the state of Yu with a family. Sure enough, the army of the State of Jin wiped out the State of Guo by means of the State of Yu, and then seized the Duke Yu who personally greeted the State of Jin and wiped out the State of Yu. The story comes from "Zuo Zhuan Xi Gong Five Years". The idiom "the lips die and the teeth are cold" means that the two sides are closely related and interdependent.