Studies on historical phonetic change of Chinese is traditionally called Chinese phonology in China.

汉语历史语音变化的研究，在我国传统称为音韵学。

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But now the "rhyme with tone" and "rhyme" of Chinese historical phonology don "t accord with this demand." Therefore this phenomenon adds difficulty to the learning and academic study in this field.

目前汉语音韵学的“韵”和“韵部”不符合这一要求，给学习和研究增加困难。

youdao

But now the "rhyme with tone" and "rhyme" of Chinese historical phonology don "t accord with this demand." Therefore this phenomenon adds difficulty to the learning and academic study in this field.

目前汉语音韵学的“韵”和“韵部”不符合这一要求，给学习和研究增加困难。

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