The so-called rhyme means that the ends of two sentences are the same. So what is a vowel? In hanyu pinyin, which represents the pronunciation of Chinese characters, the sound of a word usually consists of two parts. The first part is initials, such as G, K, H, W, zh, ch, sh, R, etc. The last part is vowels, such as a, ai, ao, ia, ian, an, etc. Among vowels, some vowels are composed of two parts, such as ia, ian, iao, uan, iong, ANG, iu, etc. This vowel consists of two parts, the front vowel part (i u) is called the rhyme belly, and the back part is called the rhyme ending. Two words that rhyme, as long as they rhyme at the end.
For example, the words An, Yuan and Yan all end in An, so they can rhyme. For example, the rhyme of poverty and dragon is ong, so it can rhyme.
Of course, in some cases, the vowels are not necessarily the same, but they can also rhyme, such as Yi (I) and Yu (V), Dong (ong) and Feng (eng).
The rhyme of modern poetry requires a wider level of rhyme, that is, words with the same vowel and different tones can rhyme.