Chang Liu is a postgraduate student reading MPhil Research in Second Language Education at the University of Cambridge. She is interested in sociolinguistics and ESL/EFL education with a special focus on language investment, identity, informal learning, digital literacies, and social inequalities. Her current research explores the role of digital technologies in shaping disadvantaged Chinese EFL learners’ language investment and identity constructions. Prior to her master’s studies, she completed a BA in Education Studies from University College London, where she examined Chinese international students’ ESL investment in the context of multilingual Singapore.