Ju Seong Lee is an Assistant Professor and Acting Head of the Department of English Language Education at the Education University of Hong Kong. He specializes in Computer Assisted Language Learning (CALL), with a focus on Extramural CALL contexts.Di Zou is an Associate Professor of Centre for English and Additional Languages at Lingnan University. Her research interests include AI in language education, technology-enhanced language learning, game-based language learning, and second language acquisition.Michelle Mingyue Gu is Professor of Sociolinguistics, and Dean of Graduate School, the Education University of Hong Kong, China. She has developed theoretical frameworks to advance the areas of multilingualism, language and identity, second-language-learning motivation, and the interaction between language, culture and ethnicity.