Its basic feature is that sentences are composed of regular sentences. What is a legal sentence? It is a sentence with hierarchical changes through the lowest phonological structure of Chinese characters-disyllables, which is what we usually call "two-four-six distinct".
In other words, a sentence should be flat and correct in the key position of "two, four and six", so that it can be called a legal sentence by moving forward alternately. This kind of alternating rule is "substitution", and failure to follow it is "substitution loss".
Therefore, as long as it is composed of alternating sentences, it is collectively called "metrical style". Metric poems are divided into metrical poems and epigrams. Metric poems can be divided into metrical poems, metrical poems and parallel poems, which are metrical poems with the same sentence length and format, while metrical poems composed of long and short sentences (metrical sentences) are epigrams, and those who obey epigrams are ditties, but they are composed of long and short metrical sentences, that is, metrical ancient.
The five-character poems, seven-character poems and five-character poems we usually read are five-character poems, seven-character poems and five-character poems, which are the most common formats in metrical poems and the most commonly used templates for modern poetry lovers.