When it comes to planning, we must first understand what "planning" is. Metrics used in poetry refers to the rules that should be observed in the form and rhythm of poetry creation, including rhyme, structure and antithesis. Rhyme includes level tone and rhyme, and its structure includes the number of sentences and words. The quatrains of modern poetry are four poems with five words and seven sentences, and the metrical poems are eight poems with five words and seven sentences. As for the arrangement, ignore it for the time being.
However, meter is not only applicable to modern poetry, but also to words and songs. The difference is that the number of words in each sentence of songs and songs is more or less, the level is not as strict as that of modern poems, and the rhyme is more even, so there is no need to rhyme to the end.
So if you write modern poetry, you need to use meter. What does this have to do with ancient people and modern people? There are many kinds of poems without metrical requirements, including modern poems, ancient poems, and of course poems written in English. I really don't like the metrical requirements, so I don't have to write modern poetry.