The eight diseases mentioned in Wen Jing and Mi Fei are ancient terms about poetic temperament. This was put forward by Liang in the Southern Dynasties, and it is also a defect in the application of the four tones.
It refers to eight disadvantages that should be avoided in poetry, namely, flat head, tail, bee waist, crane knee, big rhyme, small rhyme, side button and straight button. It is of positive significance to increase the aesthetic feeling of poetry art form and enhance the artistic effect of poetry, but it also brings some disadvantages.
This indicates that China's ancient poetry began to move from "archaic" poetry, the product of primitive natural art, to "modern poetry" of artificial art.
Extended data
Advantages and disadvantages of "eight diseases"
Shen Yue said that he was criticized by Zhong Rong and others at that time. Song's "Cang Shi Style" also said: "There is no need to stop writing poems, and the disadvantages are unfounded." Terminology of dual poetry. Refers to the duality of words and phrases in poetry. Can be two sentences relative, can also be a sentence relative. Duals generally use the same sentence patterns and parts of speech.
As a requirement of metrical poetry, the middle of metrical poetry must be a antithesis, and the first pair and the second pair are not necessarily antithesis. But there are also changes, either the neck joint is not relative or the tail joint is relative; The first couplet is rare. Quatrains are not necessarily opposites, but sometimes they are even sentences. ? Terms of rhythm in Gong Dui's poems.
Duality must use the same kind of parts of speech, such as noun to noun, pronoun to pronoun, adjective to adjective, adverb to lyrics, function word to function word. In ancient times, nouns were divided into astronomy, seasonality, geography, utensils, clothing, diet, stationery, literature, vegetation, birds and animals, insects and fish, physique, personnel and human relations. Strictly speaking, duality, part of speech and part of speech should be relative, which is called work pair.
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