Why does Guo Yuheng's "History of Ancient Chinese Literature" not talk about "Yi"

The I Ching belongs more to the history of philosophy and the history of ancient culture. The history of literature pays more attention to the sorting and analysis of literary phenomena and writers' works, and generally does not talk about the I Ching. Moreover, there was no independent literary concept in the pre-Qin period, and literature was still at the stage of being dependent on philosophy, history, and politics. The three hundred poems, pre-Qin historical biographies, and essays by various scholars that have been handed down today were not aesthetic texts at that time. Literary and artistic works exist. Therefore, what is more directly related to literature is the philosophy and history of the Pre-Qin Dynasty, as well as the political environment in which various countries competed. The ideas of the Book of Changes have a direct impact on these three, but the influence on literature needs to work through these three. , the distance between the Yi Jing and literature is relatively far. Therefore, in the limited space of the literary history narrative, it is reasonable not to mention the Yijing.