“古无轻唇音”是古音韵学家们研究上古声母后的重大发现,从声母的角度,研究汉语语音在漫长岁月中的分化演变历程。即中古后的轻唇 f 音系统,是由上古重唇 b、p 音系统分化演变而来。现代汉语中还有不少形声字的读音就是很好的证明。 “Ancient without light lip sound ” is a major phonological philosophers after the study of the ancient consumbles major discovery, from the initial point of view, the study of Chinese speech in the long evolution of the differentiation process. After the Middle Eastern light lip f sound system, is the ancient heavy lips b, p sound system evolved. There are quite a few modern Chinese phonetic pronunciation is very good proof.