What is the origin of Yuan Qu and Song Ci?

The difference between Yuan Qu and Song Ci: When China's ancient poetry developed into Tang, Song and Yuan Dynasties, there were new changes in the generation, with Ci as the surplus of poetry and Qu as the surplus of Ci, and the two competed with each other. Tang Poetry, Song Ci and Yuan Qu are three different poetic styles in the history of literature, which have their own characteristics in form, language and style. Tang poetry is basically a poem of five or seven words, and words and songs are long and short sentences. The last two stages of the development of China's ancient poetry are Ci and Sanqu. Ci and Sanqu both belong to poetry in essence and are of the same origin as poetry. The occurrence and development of * * * is closely related to music; They can not only sing and chant, but also write words by sound, rhyme and pay attention to form, sound, meaning and appearance. Ci and Sanqu are originally "folk things" and belong to folk songs for a long time. Its tunes vary from country to country and change with the times. Their development law is the so-called "human creation, literati process, metabolism." After the emergence of Ci and Sanqu, they all took a road from vulgarity to elegance, from folk to humanistic people. As Mr. Lu Xun said: "It is not difficult to follow the words at the beginning of the lyrics." "The more scholars take it for themselves, the more difficult it is to understand."