The Sandu Fu was classified in "Metropolitan City Fu" . "Metropolitan City Fu" is an important subject that has been inherited continuously from Han Dynasty to Six Dynasties. Through the relationship between Sandu Fu

Bangu’s Liangdu Fu and Zhang Heng’s Erjing Fu

we can see that there are not too many common features among these Fu works. However

by studying the differences between Sandu Fu and other similar works of other times

we can outline the development process of "Metropolitan City Fu"

understand the writing situation of "Metropolitan City Fu" in the Eastern Jin and Southern and Northern Dynasties

and judge the academic position of Sandu Fu in the history of literature.