Liu Songhao started teaching in the International College for Chinese Language Studies in Peking University in 1989, and had taught Chinese in countries such as Fiji, US, etc. Starting from 1994, Liu was a lecture in the department and in 1999, he assistant professor. From Aug, 2005 to Jun, 2006, he was a visiting scholar at the grant of Fulbright Program at University of Illinois at Urbana-Champaign. His has participated in a lot of Chinese textbooks such as HSK Simulated Tests, Chinese Reading (Intermediate), Chinese Listening Course (Elementary), Essential Reading, New Chinese Listening (Intermediate), Chengo Chinese, etc, and has gained rich experience in teaching Chinese as a foreign language (TCFL) and TCFL textbook compilation. The other authors are all experienced teachers of TCFL from Peking University.