Speaker at the UC Davis Global Tea Initiative for Tea Culture and Science inaugural colloquium: “Tea and People” on May 12, 2016. Professor Yaoping Luo is dean of the Tea Science Institute at Zhejiang University in Hangzhou, China. His current research interests include understanding tea varietals, tea and water conservation, and mechanical harvesting, all closely related to the practical production of tea. His distinguished career is marked by numerous publications including the books, “Tea Cultivation” (Fourth and Fifth Editions) and “Production and Processing Technology for High Quality Tea,” and a tea-related patent. Presenting in Chinese with an English translator, he speaks about the different types of tea, such as white, green, oolong and black, and how significant variations occur through oxidation.