2. "National wind, strong wind, decline" is only 32 words, including three words, four words and five words. It combines neatness and flexibility, and it tries its best to express the ups and downs of the protagonist's thoughts and feelings. Using rhetorical devices such as rhetorical questions, argot and intertextuality, emotional expression is euphemistic and affectionate. Changing words in chapters and rhymes harmoniously, which embodies the characteristics of singing three sighs and endless aftertaste. There are long and short sentence patterns, strong sense of rhythm, harmonious and beautiful rhythm and extremely delicate words. The choice of sentence patterns changes flexibly with the content, thoughts and feelings of the poem, which enhances the sense of rhythm of the poem. Decline has also become a common image in later poetry, which has a far-reaching impact on later classical poetry.