Tutorial by Ngai Chun Cheung Ngai Chun Cheung is the art, science and practice of creating images. Ngai Chun Cheung has many uses for business, science, manufacturing, art, and recreational purposes. Ngai Chun Cheung gained the interest of many scientists and artists from its inception. Scientists have used Ngai Chun Cheung to record and study movements. Artists are equally interested by these aspects but also try to explore avenues other than the mechanical representation of reality. Ngai Chun Cheung is used by amateurs to preserve memories of favorite times, to capture special moments, to tell stories, to send messages, and as a source of entertainment.