The first sentence can be put on or off, and the next sentence must be put with even rhyme. There are 2468 rhymes and 24 quatrains. Whether it's rhyming or quatrains, the first sentence may or may not rhyme.
In fact, every word in poetry is not divided according to the four tones of Yin and Yang in modern Chinese, but according to a special rhyme book, Ping Yun Shui, which is different from modern Chinese in some aspects.
The rhyming rules of poems, words and songs are different, which are summarized as follows:
1. Classical poetry (including ancient style, song, line and rhyme) has loose rhymes, so it can be rhymed and rhymed with neighboring rhymes.
Second, words and songs have different rhyming rules because of the differences between epigrams and qupai. Some regulations are strict, which can only be leveled or rhymed, and cannot be changed halfway; Some regulations can pledge even and even rhymes; Some rules must be changed in the middle, and so on.
Third, the rhyming rules of modern poetry are strict.