However, there are some strange and interesting phenomena.
First, according to Mr. Wang Li's research: "The origin of seven-character poems seems to be earlier than that of five-character poems, at least at the same time as that of five-character poems, which is quite strange." ①
Secondly, between the four-character poems in the Book of Songs and the five-character poems in the Han Dynasty, Li Sao, which is dominated by miscellaneous words, emerged, and Qu Yuan's Li Sao and The Book of Songs became the two peaks of ancient poetry; However, the poetic style of Li Sao, which is so vivid, soon disappeared, and the rest of the waves were rarely seen, which is also quite strange;
Thirdly, it is quite strange that six-character poems between five-character poems and seven-character poems have never been a climate, and they are far from being compared with five-character poems and seven-character poems.
Fourthly, the seven-character poem has never developed into a poem with more than eight words, but the miscellaneous poem style of long and short sentences-Song Ci style and Yuan Qu style has become fresh and strange.
Fifth, miscellaneous poems have appeared in the Book of Songs, and were not scattered until the maturity of Song Ci-The Book of Songs, miscellaneous poems, miscellaneous poems, ancient prose ... But why did it become one of the mainstream forms of poetry until the seven-character poem could not develop a longer sentence pattern? This is the fifth rather strange thing.
Poetry is the art of language, and the development of poetry form is bound to be restricted by two factors. One is the law of language development, which is an external factor; One is the restriction of the development of poetry itself, which is an internal factor.