Xing, say something else first, in order to cause the lyrics to be sung. From the characteristics, there are two situations: direct prosperity and comparative prosperity; In terms of use, there are two forms: initial prosperity and rising prosperity. Stimulate readers' association, enhance meaning and produce vivid and poetic artistic effects. For example, in Peacock Flying Southeast, "Peacock Flying Southeast, Wandering Five Miles". "。 The word "xing" in The Book of Songs is interpreted by Zhu as "talking about other things first, so as to stimulate what is sung", that is, paving the way for what is sung by other things. It is often used at the beginning of a poem or a chapter. Sometimes when a sentence in a poem looks interesting, whether it is interesting can be judged by whether it is used at the beginning of a sentence or paragraph. For example, in Feng Wei's self-protection, "Mulberry leaves are flourishing before they fall" means prosperity. About the most primitive "xing" is just a beginning, which has nothing to do with the following, but shows drift and association for no reason. Just like Qin Feng's Morning Wind, it is difficult to find a meaningful connection between the "Morning Wind" at the beginning and the "Seeing a gentleman, worrying" at the back. Although in this case, it may be incomprehensible because of the time gap, this situation definitely exists. Even in modern folk songs, we can still see such "xing".