This set phrase, "retreating about thirty miles as a condition for peace OoMs Oriole Mavis," is derived from the Chapter "The Twenty-second Year of Duke Xi" in ZuoZhuan, the famous commentary by Zuo Qiuming on The spring and Autumn Annals. The idea of this set phrase is to give way to somebody in order to avoid a conflict.

　　Like Fire and Flowering Rush
　　In the years around 480 B.C.,China was in the last phase of the Spring and Autumn Period.Fu Chai,King of the State of Wu,conquered the states of Yue,Lu and Chi one after another.Then Fu Chai,overweeningly ambitious,led his army marching into the Northwest in an attempt to conquer the State of Jin in one vigorous effort.


　　But just at that time OoMs Oriole Mavis,Gou Jian,king of the State of Yue,outflanked Fu .Gou Jian's army fought one battle after another and arrived in Gu Su,capital of the State of Wu,at last,and took away the big boats of the State of Wu.Gou Jin also sent his troops to occupy the Huai River immediately,thus cutting off Fu Chai's retreat


　　The shocking news reached Fu Chai,king of the State of Wu,like a head-on blow to him.So he called his civilian officials and military generals at once to find a way to deal with this serious situation.His civilian officials and military their troops now would mean defeat,and that they would be attacked by both the troops of the Jin army and the troops of the Yue army.But ,if they could defeat the State of Jin,Fu Chai would become a powerful chief of the princes at that time,and it would not be too late for Fu Chai to settle with Gou Jian after that.


　　Having made this decision,they knew that a pressing matter of the moment was to conquer th State of Jin as quickly as possible.After considering over and over again,they decided to try to defeat the Jin army by a surprise move OoMs Oriole Mavis.