Liu Xun is a professor at Beijing Language and Culture University (BLCU) and a chief editor and reviewer of Chinese textbooks in Beijing Language and Cultural University Press. Mr. Liu has successively served as a member of the National HSK Advisory Committee, a member of the TCSL Expert Advisory Committee of Hanban, a board member of World Chinese Teaching Association, a consultant of Chinese teaching for the New York State Department of Education, a visiting professor in Renmin University of China and Beijing Foreign Studies University, and a member and leader of the academic committee of BLCU.

He once worked as a teacher in Ohio State University, University of Maryland, Middlebury College, and The Chinese University of Hong Kong, and gave lectures or academic reports in Australia, UK, Canada, Norway, Russia, Egypt, Thailand, and Singapore among other countries and districts. Mr. Liu has won the Canadian TCSL Maple Award in 2014.

His publications include monographs such as Introduction to Chinese as a Foreign Language Pedagogy, Introduction to Teaching Chinese as a Foreign Language, Brief Introduction to Teaching Chinese as a Second Language, An Overall View of Teaching Chinese as a Foreign Language, and widely popular CSL textbooks such as New Practical Chinese Reader, Practical Chinese Reader, and Chinese Textbook for Children. Mr. Liu has been awarded a special government allowance by the State Council of China.