汉语中古音,相当长的时间里指的就是《切韵》音系。对于《切韵》的性质,已经有很多学者进行过讨论。这个问题之所以引起了广泛的兴趣,是因为它关系到对《切韵》音系的构拟和对汉语语音史的认识,另外一方面,《切韵》复杂的语音系统,也必须要有一个合理的解释。我们(尉迟治平2000)认为,《切韵》代表的是综合了南北通语的文学语言。东汉建都洛阳,直至西晋、北魏,当时正音是伊洛之音(黄笑山1995:3-4)。晋永嘉之乱,士冠南 Ancient Chinese, a long time refers to the “cut rhyme” sound system. For the “cut rhyme” nature, many scholars have been discussed. The reason why this issue has attracted a great deal of interest is because it relates to the formulation of “Qieyun” phonology and its recognition of the history of Chinese speech. On the other hand, the complicated speech system of “Qieyun” must also have a Reasonable explanation. We (Yu Chi Chih-ping 2000) believe that the “cut rhyme” represents a combination of the North-South language language. Eastern Han Dynasty Luoyang, until the Western Jin Dynasty, Northern Wei Dynasty, was the tone is the voice of Iloilo (Huang Xiaoshan 1995: 3-4). Jin Yongjia the chaos, Shiguan South