Chang Ching-Chang (1915-1998) is a well-known linguist, he has long been engaged in the history of Chinese phonetics, vocabulary study of the history, attention to language (especially voice), music, literature relationship between边缘科学importance (such as social language school) the development of a lot of results. "Collected Works of Chang Ching-Chang" is the main compilation of the results of academic research, a total of five volumes. Collected Works is not only a reflection of Mr. Zhang Qingchang context the development of academic thinking, but also reflect the high academic value of research workers is an important language reference.