Ancient rhyme mainly refers to the vowel categories analyzed by later generations from the rhyme feet of The Book of Songs.
The material for studying ancient rhyme is the homophonic system of rhyme words in The Book of Songs and other rhyme words in ancient rhyme, and the main method is joint reading.
1, which is the rhyme of the Book of Songs. Connect the rhyming feet in each chapter of The Book of Songs to form a rhyming unit. If there are the same words in two rhyming units, then combine the two rhyming units together, so that the rhyming string of the whole Book of Songs can be combined into several rhyming units, thus obtaining several rhyming parts.
2. Connect the rhyming words in other ancient rhymes.
3. Connect the harmonic sound system. The homophonic radicals of homophonic words are phonetic. Generally speaking, homophones have the same radicals and the same ancient rhyme.