Emeritus Professor of Biology at CUHK, world-renowned expert in mycology, Professor Chang has devoted himself to promoting mushroom biology all his life. He has been referred to as the ‘Mushroom Missionary’ and is currently the director of the Hong Kong Microbiological Resources Centre sponsored by UNESCO, and also the director of the Centre for International Services to Mushroom Biotechnology under the aegis of UNIDO. Joining CUHK in 1960, Professor Chang has made significant contributions by serving in different important positions, including Dean of Science and chairman of the Department of Biology.