What is a rhyme and what letters does it include?

Rhyme is a Chinese phonetics term for the part of a Chinese character sound other than the consonant and tone. It was formerly known as rhyme. Rhyme consists of three parts: the head (medial), the belly (main vowel), and the tail; according to the rhyme structure, it can be divided into single rhyme, compound rhyme, and nasal rhyme.

The part of the Chinese character sound other than consonant and tone. The old name is rhyme. Rhyme can be divided into rhyme head (medial), rhyme belly (main vowel), rhyme tail three parts. For example, the rhyme of niáng (娘) is iang (iang), where i is the beginning, α is the middle, and ng is the end. Each rhyme must have a vowel, while the beginning and the end are optional. For example, "大" (dà) rhymes with α, which is the rhyming vowel and has no beginning or end; "瓜" (guā) rhymes with ua, in which u is the beginning and α is the beginning and has no end; "刀" (dāo) rhymes with diang, in which i is the beginning and ng is the end. The rhyme scheme for dāo is ao, where α is the rhyming belly, o is the rhyming end, and there is no rhyming head.

The letters included in the rhyme scheme are:

1, open mouth call Rhymes with a, o, e, ê, er, i (before), i (after) or rhymes beginning with a, o, e;

2, chi-tongue call Rhymes with i or rhymes beginning with i, such as iou, iao, ie, ia;

3, chi-tongue call Rhymes that rhyme with u or begin with u e.g. ua, uo, uai, uei;

4, handful of rhymes Rhymes that rhyme with ü or begin with ü e.g. üe, ün, üan."