Jun Yang, Ph.D. is a Senior Lecturer in Chinese Language in the Department of East Asian Languages and Civilizations at the University of Chicago. He holds a Ph.D. in Second Language Acquisition and Teaching. His research interests include second language acquisition, Chinese linguistics and pedagogy, and K12 foreign language teacher training. Philip Yungkin Lee is an applied linguist with 30 years of practical experience in teaching Chinese to foreign learners. Now retired from the University of New South Wales in Sydney, Australia, he is the author of the Pocket Mandarin Chinese Dictionary, the Pocket Cantonese Dictionary, Essential Mandarin Chinese Phrase Book, Essential Cantonese Phrase Book, and the four volumes of Learning Chinese Characters Flash Cards (Tuttle Publishing).