1947 Studying in the United States, 1949 Master of Yale University, 1955 Doctor of Linguistics, Yale University. 195 1 Up to now, lecturer, associate professor and professor of Washington University in Seattle, USA. From 1963 to UC Berkeley, he became a professor of Sino-Tibetan Language Department in China. 1972, as an academician of Taiwan academia sinica. In the 1940s, Kun Chang made an investigation and study on the Miao, Yao, Tibetan, Naxi and other minority languages in China. 1947 published the paper "Tones in Miao and Yao languages", which laid the foundation for the comparative study of tones in Miao and Yao languages. After going to the United States, he not only continued to study Miao Yao, but also focused on Tibetan-Chinese phonology, including his Middle Ages Phonology and Qieyun (1974), Ancient Chinese Phonology System and Qieyun (1976) and Tibetan Spoken Reader (also known as Tibetan Corpus),/kloc-. The Naxi Pictograph Dictionary (reprinted with 1944, 1953) edited by him and Li Lincan has always been an important reference book for studying Naxi language.