"Guti" refers to the poetic style initiated by Huang Tingjian, a poet of Jiangxi Poetry School in the Northern Song Dynasty. Its overall style features are new, hard, thin, strange and stubborn, and its main artistic feature is to make good use of strange sentences. "Valley style" emphasizes allusions. Huang Tingjian praised Du Fu (7 12-770) and advocated writing poems "without a word or place" and turning ancient poems into poems, which was called "turning stone into gold". Huangshi uses a lot of allusions, which is not easy to understand. He used allusions to innovate and turn decay into magic.