The requirements of couplets are both "right" and "couplet". In the form of pairs, they are "right" to each other; The contents of the context take care of each other and are closely related. The upper and lower couplets must have a complete and unified structure and clear and concise language.

The number of words in the upper and lower couplets should be equal.

The phrases of the upper couplet and the lower couplet should be the same: that is, the phrases that make up the upper couplet are several words respectively, and the corresponding phrases of the lower couplet must also be several words respectively.

The upper and lower parts of speech should be consistent; The so-called part of speech refers to the category nature of words, such as nouns, verbs and adjectives. The part of speech of the upper couplet and the part of speech of the lower couplet should be the same and relative according to the order of words. This requirement is mainly to better express the ideological content in symmetrical artistic language.

Syntax of upper and lower conjunctions should be consistent; Syntax is the way to make sentences. In a couplet, the first couplet is composed of several words, so must the second couplet.

Up and down should be harmonious; In the expression of couplets, we should pay attention to the relative melody, that is, the tone is even and gentle. This is mainly for the sake of harmonious phonology, scattered ups and downs, and pleasing to the ear.

There are two main syllables in ancient poetry. One is a two-word rice called "two-tone step" and the other is a single-word rice called "one-tone step". Two-tone step is mainly based on the second word, and the requirements for the first word are not strict.

The "window" of the upper couplet and the "door" of the lower couplet are flat to flat, while "west" and "east" are opposite.

The content of the up and down links should be relevant, so that people can easily understand the author's self-encouragement through literal words.