His research focuses on citizenship and immigration, Chinese immigrants in Canada, ethnic relations, comparative and international education, and adult and lifelong education. He has numerous publications, including books, journal articles, and book chapters. He is past co-president of the Canadian Association for the Study of Adult Education (2009-2011) and a former Associate Editor of the Canadian Journal for the Study of Adult Education (2008-2011). Recently he was appointed Member of the Independent Network of Labour Migration and Integration Experts (LINET) at the International Organization for Migration (IOM) in Brussels; Member of the Expert Advisory Committee of the Overseas Chinese Affairs Office of the State Council of China.