Comparison and Analysis of the Narrative of Du Yu's Explanation about"Alliance in You"in Spring and Autumn Annals and Zuo Zhuan
Zuo Zhuan used"Zheng Cheng"to explain the alliance among the feudal lords in the Spring and Au-tumn Annals in the 16th year of the Zhuang Gong,which meant that this"Cheng"was a temporary thinking based on the interests of the Zheng state for the agress of Song,Qi,Wei,and Chu.There are similarities in the differences between the two,both of which reflect the feudal lords seeking hegemony.The Zuo Zhuan praises"the virtue of appeased feudal lords"and praises behavior of Bo for"saving trouble,dividing disas-ters,and punishing sins".Perhaps due to the incorporation of"force and expedition",he is not considered a royal way,but is instead set as a model for tracing the ideal of royal way.