metric
Quatrains are divided into quatrains and archaic quatrains according to the poetic style. Archaic quatrains appeared after the rise of metrical poems, and existed long before the appearance of metrical poems. Xu Ling, editor-in-chief of Chen Dynasty in the Southern Dynasties, is known as the "ancient quatrains". However, although this quatrain rhymes, it is relatively free, or it can be said that some poets are unwilling to be bound by meter. After the popularization of law, ancient quatrains are still in use and development. There were many five-character quatrains in ancient times, but few seven-character quatrains. So seven words and eight sentences are not very common.
Count by word number
According to the number of words in each sentence, quatrains can be divided into five-character quatrains, six-character quatrains and seven-character quatrains, of which five or seven quatrains are the majority and six quatrains are few.
law
Rhyme, like metrical poetry, emphasizes persistence and rhyme according to the level tone of metrical sentences.
Quatrains are divided into five-character quatrains and seven-character quatrains according to the number of words.
Gujue
Since the ancient absolute is absolutely opposite to the law, it is not bound by the law and rhyme. This is a kind of classical poetry. Anyone who meets one of the following two conditions should be regarded as ancient and unique.