著名語言學家周法高先生（1915～1994）一生致力於中國語言學的研究， 在文字學、音韻學、訓詁學、語法學、古籍整理訓釋等方面取得了卓越成就。 〈玄應反切考〉、〈廣韻重紐的研究〉、〈切韻魚虞之音讀及其流變〉、〈梵文t ̣ḍ的對音〉、〈三等韻重唇音反切上字研究〉、〈古音中的三等韻兼論 古音的寫法〉、〈說平仄〉、〈論中古漢語的音位〉、〈論切韻音〉、《玄 應反切系統之再檢討〉、〈玄應反切再論〉、〈隋唐五代宋初重紐反切研究〉 等論文構成了周先生的漢語中古音系統。周先生的中古音研究系統是上世纪 最具代表性的體系之一。

Mr. Chou Fa-Kao (1915～1994),a famous linguist, devoted his life to Chinese linguistic research, who had made remarkable achievements on graphology, phonology, classical Chinese semantics, grammar, and annotations of ancient books. We can structur Mr. Chou's middle Chinese sounds system based on the following academic papers: “Textual Research on Xuanyin's Fanqie＂ “ Research on Redundant Syllables in Rhyme Tables of Guangyun ＂ , “Pronunciation and Evolution of Yu and Yu (魚虞) in Qieyun＂, “Chinese Transcription of Sanskrit words t and d＂, “Research on the Third Division Bilabials' First Characters in the Fanqie＂, “Research on the Third Division of Ancient Chinese Sounds and It's Spelling＂, “The Discussion of the Even and Uneven Tonal Categories＂, “Research on the Phoneme of Medieval Chinese＂, “Research on the Phonetic System of Qieyun＂, “Further Research on the Fanqie System of Xuanying＂, “Re-discussion on the Fanqie System of Xuanying＂, “Research on Redundant Syllables in Rhyme Tables' Fanqie from the Sui Dynasty, the Tang Dynasty＂, the Five Dynasties Period and the Early Years of the Song Dynasty＂ and so on. This sound system was one of the most representative systems of the last century.