Extended data
In modern poetry, single sentence is called antithesis, double sentence is called antithesis, and addition is called antithesis. In metrical poems, the first to eighth sentences are called first couplet, parallel couplet, neck couplet and tail couplet respectively. In metrical poetry, couplet and neck couplet must be opposed. In addition to the relative part of speech, antithesis first requires the same sentence form. In addition, according to the severity of confrontation, there are "workers' right" and "lenient right".
The level of sentence and the level of sentence must be opposite, which is called "right"; The parallel lines of the lower conjunction and the upper conjunction must be consistent, which is called "sticking".
The so-called level tone refers to the tone of words. Flat refers to the flat sound in four tones, and refers to three of the four tones. The phonetics and flat tones used in the old poems are mutually adjusted to make the sounds harmonious, which is called "flat tones". The "four tones" mentioned here are different from the "four tones" in modern Chinese.
Generally speaking, the ancient flat tone is roughly equivalent to the yin-yang tone of modern Chinese; Rising and falling tones are roughly equivalent to rising and falling tones in modern Chinese.
There is no entering tone in Mandarin. In ancient times, Rusheng characters were divided into flat tone, rising tone, falling tone, such as "six" for falling tone, "eight" for flat tone, "ten" for rising tone and "hundred" for rising tone. The characteristics of Rusheng characters are: the length of the sound and the stop rhyme.
In some dialects, there are entering tones, such as Guangzhou dialect, Changsha dialect and Shanghai dialect. If we read the words "one, seven, eight, no, black, white, national, crying and independence" in Shanghai dialect, we can appreciate the ancient Rusheng characters well.
References:
Baidu encyclopedia-poetry