Social and political factors. The reasons for the transformation of the early crescent school and the late crescent school were influenced by social and political factors, and the poets of the crescent school, represented by Xu Zhimo and Wen Yiduo, made corresponding changes in theory and creation.

1. Theoretically, compared with the early crescent school's "writing new poems as a serious matter", the late crescent school advocates that the metrical pattern of poetry cannot be a framework and obstacle for expressing emotions, and at the same time puts forward the slogan of "aristocratic poetry" and insists that poetry is purely utilitarian, self-expressive and aristocratic.

2. In the emotional aspect of poetry, it has degenerated into "universal decadence and disillusionment". Take Xu Zhimo's creation as an example. Zhimo's belief in tiger poetry has degenerated from a simple belief to a "suspicious decadence". It was written on a frozen jade night, and city life shattered his instinct of poetry creation. Chen Ye showed his poem a wild flower.