What's the difference between poems, words and songs? About 50 words

Poetry, Ci and Qu are three unique categories of poetry in ancient China. Poetry: a literary style that reflects life and expresses emotions through rhythmic and rhythmic language. Word: from poetry. Ci, like modern poetry, has strict rules in rhyme, level tone, number of words and sentences. Ci is a literature of singing. Qu: A genre of classical poetry that emerged after poetry and prevailed after the Yuan Dynasty. Qu is the further development of ci. Qu is basically the same as Ci, and it is also a singing literature. The format is strict, and there are also tunes called Qupai, but the rhyme and level should be looser, and more oral English should be used. I'm simplifying myself.