Couplets are independent chapters composed of two neat antitheses. Its basic characteristics are that the number of words is equal and the tone of words is relative; Similar parts of speech and syntax; Semantic relevance and linguistic potential equivalence.
As a literary genre and cultural phenomenon, antithetical couplets are conceived in "Parallel Prose" and "Regular Poetry", formed after "Parallel Prose" and "Regular Poetry", and independent of "Parallel Prose" and "Regular Poetry". Contrary to the art of calligraphy, it is developed on the basis of "parallel prose" and "regular poetry". As a literary brand and a cultural phenomenon, antithetical couplets have the most China characteristics, and cannot be translated, rewritten or transplanted.
Couplets vary in length, only one or two words are short; It can be as long as 1000 words. There are various forms of couplets, such as pairs, pairs, flowing pairs, couplets, set sentence pairs and so on.