After years of decline, Tang poetry gradually flourished from Tang Dezong to Tang Muzong for more than forty years, and reached its climax in Yuanhe period of Tang Xianzong. During this period, there were many famous artists and schools. Poets focused on opening up new ways, exploring new techniques and expounding poetry theory, and created a large number of poems with innovative charm, showing a prosperous landscape of poetry in the prosperous Tang Dynasty since the middle Tang Dynasty. Han Meng School of Poetry is the first group of poets who made this new change.
One of the representatives is Han Yu, who has been in decline for eight generations. Han Yu, Meng Jiao, and some poets around them who pursue fantastic beauty and attach importance to subjectivity often break the shackles of statutes and enter poetry with prose sentences, creating a "fantastic" poetic style in the artistic form of poetry, which reached its peak especially when Li He appeared.