Ancient poetry can be divided into ancient poetry (ancient style), Yuefu poetry and modern poetry (modern poetry and metrical poetry), among which the division of ancient poetry and modern poetry is based on the Tang Dynasty. The poems formed before them are called ancient poems, and later they are called modern poems or modern poems. Poetry before the Tang Dynasty was not strict with meter, but it was very strict after the Tang Dynasty, forming a new theme-meter poem (requiring harmony in meter). The 223 you said is actually a metrical poem. There are two kinds of metrical poems: one is flat and parallel, and the other is flat and parallel; Second, plain, plain ... ",regardless of five words, six words, seven words, nine words, just intercept in order. If so, the tone of every two words is required to be alternating, which leads to the saying that "odd tones can be ignored, but even numbers (that is, flat even numbers) must be considered." So the rhythm of reading becomes 22 (four words), 23 (five words), 222 (six words), 223 (seven words), 2222 (eight words) and so on. 3 can be divided into 12 or 2 1. Metric poetry is mainly composed of five words and seven words, but other poems, including words and songs, formed later are also influenced by this.
Modern poetry is generally divided into two types: free verse (metrical form) and Europeanized verse (metrical form). Free verse has no fixed requirements, so you can write it casually, and of course you can read it casually, without paying special attention to the rhythm. Europeanized poetry requires rhythmic steps, such as ten sounds per line, that is five steps, and so on, similar to the style of ancient poetry.