2. Be straightforward and have a harmonious tone. The traditional habit is to "pucker up and fall flat", that is, the end of the last sentence of the first couplet is puckered up and the end of the last sentence of the second couplet is flat.
3. Parts of speech should be relative and in the same position. It is generally called "virtual to virtual, real to real", which means that nouns to nouns, verbs to verbs, adjectives to adjectives, quantifiers to quantifiers, adverbs to adverbs and related words must be in the same position.
4. Be content-related, from top to bottom. The meaning of up and down links must be interrelated, but they cannot be repeated.
Extended data
The so-called "sonorous voice" of the ancients is one of the important factors, although there are many stresses.
The intertwining of Pingze in the poem can be summarized as two sentences:
(1) Even couples are alternating in this sentence;
(2) Pingzhuan is opposite in the antithesis. This kind of flat and even rule is particularly obvious in metrical poems.
Distinguish flat tones: In those dialects with entering tones, there are more than four tones. Not only is the level tone divided into yin and yang, but also the rising tone, falling tone and entering tone are often divided into yin and yang. Just combine them, for example, combine the flat tone and the upper voice into a flat tone, and combine the upper voice, the upper voice, the falling voice, the falling voice, the entering voice and the entering voice into a flat tone.