The earliest recorded couplets appeared in the Three Kingdoms period. During the Hongwu period of the Ming Dynasty, a huge iron cross was unearthed in Luling, Jiangxi Province, on which was cast the year number of Sun Quan Chiwu in the Three Kingdoms period.

There is a beautifully made couplet cloud on the iron cross: "The four seas celebrate An Lan, and the iron column stays on the cross. The people are pregnant with Ozawa, and the golden stove is fragrant for a thousand years. " Its form and content are related to early Christians in China.

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Couplets vary in length, only one or two words are short; It can be hundreds of words long. There are various forms of couplets, such as pairs, pairs, flowing pairs, couplets, set sentence pairs and so on. But no matter what kind of couplets are used, they must have the following characteristics:

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 curl up and fall flat, that is, curl up at the end of the last sentence and curl up at the end of the last sentence.

3. Parts of speech should be relative and in the same position. Generally speaking, it is called virtual to virtual, real to real, that is, nouns to nouns, verbs to verbs, adjectives to adjectives, quantifiers to quantifiers, adverbs to adverbs, and relational 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-couplets