The Yuan Dynasty was the heyday of Yuanqu. Generally speaking, zaju and Sanqu are collectively called Yuan Qu, which is the main body of literature in Yuan Dynasty. However, the achievements and influence of Yuan Zaju far exceeded that of Sanqu, so some people called Yuan Zaju "Yuan Qu" or "Yuan Qu". Yuanqu is a wonderful flower in the splendid cultural treasure house of the Chinese nation, which embodies its unique characteristics in ideological content and artistic achievements and has become three important milestones in the history of China literature. Yuanqu originated from the so-called "Fanqu" and "Le Hu" and was first circulated among the people, and was called "Street Tune" or "Village Square Minor". With the destruction of Song Dynasty in Yuan Dynasty, it spread in the vast areas of north and south, centering on Dadu (now Beijing) and Lin 'an (now Hangzhou). Yuanqu has strict metrical formula, and each qupai has fixed format requirements in sentence pattern, word number, level tone and so on. Although there is a fixed framework, it is not rigid. Interlaced characters are allowed in the fixed frame, and sentences can be added to some qupai. In terms of rhyme, it is allowed to be flat and even, which is more flexible than quatrains and Song poems in metrical poems. Therefore, readers can find that two songs with the same "Qupai" sometimes have different words, which is the reason (the one with the least words in the same Qupai is the standard frame). Yuanqu is another literary prosperity after Tang poetry and Song poetry, and it has its unique charm: on the one hand, Yuanqu inherits the beauty and gracefulness of poetry; On the one hand, in the Yuan Dynasty, the soldiers and soldiers were placed in the position of "eight prostitutes, nine men and ten beggars", and the political monopoly and social darkness made Song Yuan radiate extremely dazzling fighting brilliance and reveal rebellious feelings; Sharp-edged pointed at the drawbacks of society, denounced the society that "not reading is the highest, illiteracy is the best, and people who are not sensible are bragging", and pointed at the world trend that "everyone is embarrassed to live, and no one can see the money". The works describing love in Yuan Qu are also more inflammatory and bold than the poems of past dynasties. All these are enough to keep the artistic charm of Yuanqu forever. Yuanqu can be divided into zaju and Sanqu. Sanqu can be divided into several sets, a poem and a song tape.