There are two opinions about the title of "quatrains": The first one: "quatrains" are also called "quatrains", or "cut sentences" and "broken sentences". Both cut and cut contain short words. It means to cut off. According to the explanation of "The Origin of Poetry", quatrain means "cutting a sentence", which means to cut off four lines of the verse, or cut off the first and last couplets, or cut off the first two couplets or the last two couplets, or the middle two couplets (the first and last couplets, the first two couplets) , second two, middle two). The second type: "quatrains" are derived from "five-character short ancient songs, seven-character short songs". The people of the Tang Dynasty gave it a rhythm and finalized it to become a quatrain. Each quatrain consists of four sentences, usually with five or seven characters, referred to as five or seven characters, and occasionally six characters. The first statement about the title of quatrains is incorrect. Regarding the statement that quatrains are half of the verses, Wang Fuzhi, a thinker in the Qing Dynasty, once pointed out: "Five-character quatrains come from five-character ancient poems, and seven-character quatrains come from songs. The style version is before the verses, and the verses come out from there, so the poems are full and smooth. It is said that the quatrains may be cut off half of the verses, or the first four sentences, or the last four sentences, or two sentences at the beginning and the end, or two couplets in the middle. Judge, cut off the head and cut off the feet, just to punish people. I don’t know who said this, to kill people’s physiology!” Zhao Zhixin, the author of "Tone Diagram" also pointed out: "Two sentences are a couplet, and four sentences are a continuation, which began in the Six Dynasties. , later generations of Yuan Fei Dynasty mistakenly regarded quatrains as truncated verses, so I asked this question." It can be seen that the quatrains are a formalistic assumption and cannot be trusted.