Long tune is a form of ci tune, which refers to the long tune in ci tune The words above 9 1 are the long tune in the Ming textbook "Leibian Caotang Poetry", which seems unfounded, but because of its popularity, they are generally used. In the Tang Dynasty, some people thought that "the long tune is a seven-character poem, and the short tune is a five-character poem, such as Man Jiang Hong, Water Turning, Nian Nujiao, Shui Long Yin, Yu Lin Ling, Yong Music, Qinyuanchun and so on. The longest piece is more than 200 words. For example, the preface to songbirds has 240 words, which is the longest known long tune. Compound beats are often used. Music segments composed of upper and lower sentences are common, and there are also couplets composed of polyphonic segments or even multiple segments, which are mostly non-square structures. Lyrics are mostly composed of two lines and one paragraph, which are repeatedly sung with different rhymes. The combination of lyrics and songs is "more words and fewer sentences", and the tunes are often dragged and dragged, and the melodies are dotted with various decorative sounds (Nogula). Except for solo,