First frost couplets

It snowed lightly, and the vernal equinox was not too cold.

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 which the metrical sentence pattern is the most strict in terms of smoothness, while the classical verse sentence pattern requires smoothness at the end of the sentence, and other positions are not limited.

Extended data:

Its most essential feature is duality. When expressed orally, it is oral duality, and when expressed in writing, it is text duality.

When it comes to the four requirements of equal number of words, relative parts of speech, even words and the same syntax, the key of the four requirements is equal number of words and even words. The number of words here is equal, which is different from the "number of words" in English. Its essence is syllable equality.

That is, one syllable corresponds to one syllable. In English, the words "car" and "jeep" are equal in number, but not in syllable. In Chinese, "truck" and "jeep" are equal in number and syllable.