Chi-fai Chau obtained his doctoral degree in Biology from the Chinese University of Hong Kong, while Hoi-shan Kwan received his doctoral degree in Microbiology from the University of California, Davis, USA. They are teaching at the Food Science Department of National Chung Hsing University, Taiwan and the Biology Department of the Chinese University of Hong Kong respectively. They have had extensive research and teaching experiences in Chinese medicinal plants, health foods, nanotechnology, genetics, biotechnology and food microbiology.