guǎng / yùn / shì / yán / jiū / zhōng / gǔ / hàn / yǔ / yǔ / yīn / de / zhòng / yào / wén / xiàn

《广韵》是研究中古汉语语音的重要文献。

The Guangyun is an important source for studying the phonology of Middle Chinese.