zài chuán tǒng yùn shū zhōng，tóng yī shēng mǔ、tóng yī yùn mǔ de zì wǎng wǎng huì bèi guī rù tóng yī gè xiǎo yùn。

在传统韵书中，同一声母、同一韵母的字往往会被归入同一个小韵。

In traditional rhyme books, characters with the same initial and final are often grouped into the same homophone group.