Combined with his works, this paper analyzes Zuo Si's contribution to the development of epic.

Zuo Si's epic is characterized by expressing his ambition through history and expressing his pain and resentment that he could not display his talents and realize his ideals in aristocratic society. For example, the second is to insinuate the reality through the comparison between Zhang Jin's family and Feng Tang; Sixth, Jing Ke expressed his contempt for the noble giants and his affirmation of his own value. Its contribution to the development of epic lies in truly putting? Poetry? And then what? History? Together, the narrative of historical events and the expression of ambition and homesickness have opened the way for the development of epic.