As the third volume of a multi-volume set on Chinese phonetics, this book examines the phonetical system of Modern Chinese and phonetical changes from Middle Chinese to Modern Chinese. Chinese language history is generally split into three phases: 1) Old Chinese, the form of the Chinese language spoken between the 18th century BC and the 3rd century AD, 2) Middle Chinese, between the 4th century AD to around the 12th century AD, and 3) Modern Chinese, since the 13th century. This volume studies the phonetical systems of Modern Chinese, including the initials system, vowel final system, nasal final system, entering final system, and tonal system. The author discusses the distinct change of these systems from the period of Middle Chinese to that of Modern Chinese and studies the formation of the standard pronunciation of the common language of the modern Han nation. This comprehensive groundwork on Chinese phonetical history will be a must read for scholars and student studying Chinese language, linguistics and especially for beginning learners of Modern Chinese phonetics.