Ping of the seven laws means adding two words before the five-character sentence, so that Ping becomes Ping and Ping becomes Ping. The rest is no different from the five-character rhyme. Generally speaking, the first sentence of five-character rhyme is not rhyming, and it is more common to pucker up; Seven-character rhyme takes the rhyme of the first sentence as the right track Generally, metrical poems are intercepted from the beginning to the end, and some are intercepted from the back. As for intercepting from the middle, it is very rare.
Extended data:
In the early Tang Dynasty, Shangguan Yi advocated the theory of "six pairs" and "eight pairs" and summarized the dual methods of predecessors, which had a great influence on the development of rhythmic poetry. Four outstanding poets in the early Tang Dynasty created a large number of regular poems, which promoted the development of regular poems. On the basis of predecessors' practice, Shen Quanqi and Song decided on the format of metrical poems after careful consideration.
Du Fu was the first poet who wrote a large number of seven-character poems. His works are extensive in content and skillful, which makes the creation of seven-character poems mature. His metrical poems pay attention to the antithesis of temperament and language, and become a model of all previous dynasties.