Chan is a professor of law at the University of Hong Kong. She specializes in public law and has written on proportionality, judicial deference, national security and human rights, law and authoritarianism, legal pluralism, subnational constitutionalism and China-Hong Kong constitutional relations, amongst other topics. Her monograph, Deference in Human Rights Adjudication (Oxford University Press, 2024) was awarded a Special Mention for the International Society of Public Law (ICON-S) Book Prize and was one of two finalists for the 2024 Book of the Year Award from the International Forum on the Future of Constitutionalism.