Prof. Zhi Ning is a Professor at the Division of Environment and Sustainability, Hong Kong University of Science and Technology, China. He is also the Associate Dean of the Academy of Interdisciplinary Studies (Research and Graduate Studies), Director of the Environmental Central Facility, and Associate Director of the Atmospheric Research Center. He earned his PhD in Environmental Engineering in 2009 from the University of Southern California. His research interests are air pollution, air pollution measurement and modeling, air pollution exposure and health impact assessment, microsensors, and instrumentation and measurement.