1, words are equal and sentences are consistent. In addition to deliberately leaving a place for a word to achieve a certain effect, the number of words in the upper and lower couplets must be the same, neither more nor less.
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.
Second, the display of couplets.
Traditionally, hanging couplets must be written correctly and pasted vertically, from right to left and from top to bottom, and cannot be reversed. Now you can also go from left to right (the upper part is on the left and the lower part is there). But it should be a horizontal batch. If the horizontal batch is written from right to left, paste the bottom couplet from right to left and vice versa.
Extended data:
Method of distinguishing up and down links
What is a flat tone? In modern and modern popular rhymes, the word is divided into four tones, and the flat tone does not distinguish between yin and yang, which is called "ping"; The three tones of rising, falling and entering are "Xu". In modern Chinese, the tone of Yin Ping and Yang Ping is "flat", and the rising tone and falling tone are both "flat". The classification of the old sound and the classification of the present sound shall not be mixed in the same joint. For example:
Indifferent to elegance, poverty and virtue that have never existed since ancient times.
Hey hey hey hey hey hey.
In the above example, "-"is a flat sound and "what" is a noisy sound. Indifferent and poor, never to ancient times, more elegant to Huaixian. No matter how it changes, the suffix of each couplet must be silent; The suffix of the next couplet must be flat. Any work that does not meet the basic requirements of couplets is not called couplets.
Reference source: Baidu Encyclopedia-Couplet