Bixing is the traditional expression of China's poetry. In the Song Dynasty, Zhu regarded Bixing as an expression to explain its basic characteristics. He thinks: "If you compare, you should compare with other things"; "If you are excited, you should say something else first to arouse the words you are reciting." Generally speaking, comparison is a metaphor, a metaphor that visualizes people or things, making its characteristics more distinct and prominent.

"Li Sao" mentioned that I wandered around Dongting Lake for a long time, longing for the arrival of Mrs. Xiang with sincere expectations. However, contrary to expectations, Mrs. Xiang did not come until dusk.

By comparing the abnormal phenomenon of "what birds gather on the apple and what is on the tree", it highlights the disappointment and confusion that fills the hearts of the characters, which means futility and futility. Why is the moose in the back eating in court? What is the source of coke? And use this perverted bi xing technique.