Each rhyme has four sentences (that is, eight sentences), and each sentence has five words as a five-character rhyme, which is called "five laws" for short; Each sentence of seven words is a seven-character rhyme, referred to as "seven laws". The first and second sentences of metrical poems are called the first couplet, the third and fourth sentences are called the parallel couplet, the fifth and sixth sentences are called the neck couplet, and the seventh and eighth sentences are called the tail couplet. "Parallel connection" and "neck connection" must be dual; The last word of the second, fourth, sixth and eighth sentences must rhyme. Modern poetry, also known as modern poetry, is a new style of poetry that appeared in the Tang Dynasty, and it is named because it is different from ancient poetry. Modern poetry can be divided into quatrains and metrical poems, and four quatrains and eight metrical poems. Quatrains and metrical poems have five words and seven words. Five-character quatrains come from five-character ancient poems in Han and Wei Dynasties. Seven-character quatrains evolved from music (song) poems in the Southern and Northern Dynasties. Five-character ancient poetry is a genre of ancient Chinese poetry, and the whole article consists of five sentences.
Before the Han Dynasty, there were occasional five-character poems, but there were no complete five-character poems. Five-character poems first appeared and developed in folk songs and Yuefu folk songs in Han Dynasty. According to Records of Five Elements in Hanshu and Biography of Yinshang, the ballads of the Western Han Dynasty when it proclaimed itself emperor have become a complete five-character style. During the Eastern Han Dynasty, five-character poems emerged constantly and were incorporated into Yuefu, such as Mulberry on the Stranger, Lotus Picking in Jiangnan and so on. , are relatively mature five-character works.