This paper aims to study the several problems in the Yangsheng rhyme of Juyao(full name Gujinyunhuijuyao(古今韻會擧要)). Juyao designed the Zimuyun(字母韻) system is an important material for demonstrating the phonetic change in the history of the commonly used Chinese language from Ancient Chinese to Modern Chinese. This paper focuses on studying the following problems: First, I will examine the availability of materials used in reconstructing the Yangsheng rhyme system of Juyao. Secondly, I will try to reconstruct the Yangsheng rhyme of Juyao on the basis of several materials. Finally, I will analyze the Zimuyun systemof Juyao and discuss several problems concerning the Yangsheng rhyme. I will also study Chinese nasal final syllable change and the phonological system’s basis of Juyao by comparing the differences between Juyao and Guangyun(廣韻), Zhongyuanyinyun(中原音韻), Contemporary Chinese dialects.

古今韻會擧要(Gujinyunhuijuyao) , 字母韻(Zimuyun) , 陽聲韻(Yangsheng rhyme) , 음 변화(phonetic change) , 비음 운미 음절(nasal final syllable)