In Wen Fu, Lu Ji not only put forward this pioneering viewpoint, but also standardized the "emotion" to be reflected in poetry, requiring it to be true feelings. He said that "faith and appearance are not bad, so every time they change", that is to say, "love" is the true feeling, and all external manifestations are the result of the externalization of true feelings.
"Poetry is based on emotion" comes down in one continuous line with the theory of "ode to emotion" in Preface to Poetry, which puts aside the political and religious functions of Confucianism in poetry and only emphasizes the aesthetic characteristics of poetry. Emphasize that poetry comes from inner feelings and pursue the beautiful and moving role of poetry. This is the expression of literary independence. This proposition is of great significance to create a generation of ethos, so that the lyricism of poetry is not bound by "ceremony". The proposal of taking emotion as poetry is one of the important theories of China's poetics.