Liu Xun is a professor at College of Humanities and Social Sciences of Beijing Language and Culture University, chief senior editor of Chinese textbooks of Beijing Language and Culture University Press, and member of the Advisory Committee Board of the HSK Committee. He was a member of the Hanban Expert Advisory Committee for Teaching Chinese as a Foreign Language, consultant of Chinese teaching for the New York State Department of Education, board member of World Chinese Teaching Association. His research focuses on Teaching Chinese as a Foreign Language, second language acquisition, teaching material development and teachers’ training. He has published Explorations on Pedagogy in Teaching Chinese as a Foreign Language, An Introduction to Pedagogy in Teaching Chinese as a Foreign Language, A Brief Introduction to Teaching Chinese as a Second Language, An Introduction to Teaching Chinese as a Foreign Language; He once assumed the main responsibility in the design of the first set of HSK and was awarded Special Government Allowance from the State Council.