Look at the old scenery in the cave; Looking out the window, it's already the Spring Festival. Tear up and inherit the records of martyrs; Swear to turn your last wish into a grand plan. A white head is expensive; The bones buried in Xichou after death are also fragrant. It is a unique art form of Chinese, concise and profound, neat and even, with the same number of words and the same structure.

Introduction of couplets.

Couplets, also known as antithesis, antithesis, spring stickers, Spring Festival couplets, couplets, peach symbols and couplets (named after the pillars hanging in halls and houses in ancient times), are a kind of dual literature, some of which originated from peach symbols.

Another source is the spring release. The ancients posted the word "Yichun" more and more at the beginning of spring, and then it gradually developed into Spring Festival couplets, expressing the good wishes of the working people in China to ward off evil spirits and avoid disasters and welcome good luck. Couplets are antithetical sentences written on paper, cloth or engraved on bamboo, wood and columns.

Parallel prose and rhyme are two direct sources of couplets. In the process of its own development, couplets have absorbed the characteristics of ancient poems, essays, lyrics and songs. Therefore, the sentence patterns used in couplets include ancient poems, prose sentences and parody sentences in addition to regular poems and parallel prose sentences.

Different sentence patterns have different metrical patterns and different leniency. Among them, the sentence pattern of rhythmic poetry is the most strict, while the sentence pattern of ancient verse has no restrictions except at the end of the sentence.