The evolution of couplet posting method;

Ancient couplets were written from right to left, so the first couplet was on the right side of the door. Now, because the writing habit is from left to right, some people stick the top couplet on the left side of the door.

Position judgment of couplets;

It depends on the writing of horizontal batch. If the horizontal batch is written from right to left, the upper part should be posted on the right, and vice versa.

Judgment of couplets;

Generally, couplets are written vertically, with the last word (tone) of the first couplet posted on the right (hand) and the last word (tone) of the second couplet posted on the left (hand). To judge the upper and lower couplets, we can distinguish them from the content of couplets, and more importantly, from the flat sound at the end of couplets. It is strictly stipulated in couplets that the last word of the first couplet should be flat and the last word of the second couplet should be flat. Later generations called this rule "flat rise and flat fall".

Extended data:

Requirements for writing couplets:

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.

Baidu encyclopedia-posting couplets

Baidu encyclopedia-couplets (Chinese and literary terms)