Dr Meng Gao is an Assistant Professor at Hong Kong Baptist University. His research explores the formation mechanism of extreme air pollution events, and the link between climate change, air pollution and health impacts. He was invited to participate in the Atmospheric Chemistry Colloquium for Emerging Senior Scientists (ACCESS XIV) 2017. He is leading the topic related to aerosol feedbacks on air quality and climate in a large international model inter-comparison study in which 30 research groups are involved. He has published more than 30 peer-reviewed papers to date Dr Zifa Wang, Professor at the Institute of Atmospheric Physics, Chinese Academy of Sciences. Professor Wang is a world-renowned leader in the development of air quality models. He played an important role in the development of the CFORS (Chemical weather FORecasting System) model in Japan, and his NAQPMS (Nested Air Quality Prediction Modeling System) is widely used to predict air quality by Chinese government. He has published nearly 300 peer-reviewed publications, has earned various prestigious awards, including the second-class State Science and Technology Progress Award. Dr Gregory R. Carmichael has a BS, MS and PhD in chemical engineering and has done extensive research related to air quality and its environmental impacts. He is currently the Karl Kammermeyer professor of chemical and biochemical engineering at the University of Iowa. He also serves as chair of the Environmental Pollution and Atmospheric Chemistry Scientific Steering Committee of the World Meteorological Organization. He is fellow of American Geophysical Union (AGU), and fellow of American Institute of Chemical Engineers (AIChE). He is a leader in the development and application of chemical transport models at scales ranging from local to global. He has published more than 350 peer-reviewed papers to date. The majority of his recent papers deal with the development and application of chemical transport models (CTM) to studies in regional atmospheric chemistry, air quality and climate.