According to this principle, people divide all Chinese characters into two categories: one is flat, the other is flat, and the relationship between them is yin and yang. Flat tones alternately produce rhythm, and rhythm also produces the beauty of Chinese phonology.
Couplets should not only alternate with the same sentence, but also with the upper and lower couplets, that is, the corresponding positions of the upper and lower couplets must be equal and opposite. The antithesis of pronunciation and the antithesis of meaning form the uneven beauty of the structure of conjunctions, which will be catchy, cadence and harmony when read.
As a couplet, it should meet the following rules:
(1) The number of words in the upper and lower parts must be equal, and repeated words cannot be used.
(2) The last sentence of the first couplet must be written silently, and the last word of the next couplet must be flat.
(3) The sentence patterns of the upper and lower couplets must be consistent (equivalent parts of speech and corresponding structures).
(4) The horizontal lines of the upper and lower couplets should be relative. Where the upper couplet uses flat sound, the lower couplet must use flat sound, and vice versa (flat: flat sound; Cue, Cue, including words with three tones of up, down and middle).
(5) The upper and lower couplets can have similar or opposite meanings, but only one thing can be said, or two things can be said separately.
The antithesis of couplets and metrical poems has a relationship of inheritance and evolution. The flat and even meter of metrical poems and the principle of "no matter whether 135 or 246 is clear" are also applicable to couplets. As for the number of words in each couplet, there is no limit, ranging from four words, five words, six words, seven words, eight words and nine words to tens or hundreds of words, as long as you have something to say.
Make couplets with harmonious rhymes. The language is concise, consistent with the law and has certain content. Words are not relative, levels and levels are not harmonious, or slogan-style sentences are divided into two lines, which can't be regarded as couplets.
The above contents can be summarized as "four stresses", that is, "word equivalence, flat pronunciation, word opposition and syntactic symmetry".
At the same time, the contents of the upper and lower couplets should be related, but they cannot be the same or repeated. The same antithesis is commonly known as "crossing your hands", such as "Welcome Five Blessingg in the New Year, and receive more than three times in the Spring Festival", in which "New Year" and "Spring Festival", "Welcome" and "Receive" are all agreed. Traditionally, this kind of couplets is considered as a taboo in making couplets. In this paper, the principle of "no matter whether it's 123546 or 123546" is also applicable to couplets, which means that the first, third and fifth words in each sentence of five-character poems and seven-character poems are not even, and the flat and turbid words are flat and turbid. The second, fourth and sixth words of each sentence must be plain and clear, and cannot be replaced. Because the first, third and fifth words are relatively flat and easy to move, the pronunciation has little influence. If the second, fourth and sixth words are flat and unbalanced, it will be difficult to read. This is a taboo for orthographic poetry, and it is also a taboo for traditional couplets when used in the creation of couplets.
Basic sentence patterns:
narrow
flat
Hey hey.
(Ping) Ping
Flat/flat
(Uniform/Average)
Ping (Ping) Ping (Ping)
(flat) flat
(Ping) Ping/(Ping) Ping
(Ping) Ping/(Ping) Ping (Ping)
Flat/flat (flat)
Flat/flat (flat)
Ping (Ping) Ping/(Ping) Ping.
(Ping) Ping/Ping (Ping) Ping (Ping)
(Ping) Ping, (Ping) Ping/(Ping) Ping, (Ping)
(Ping) Ping (Ping)/(Ping) Ping, (Ping) Ping.