Dr. Song Guo is now a Tenured Associate Professor at Peking University, China. Song receives his Bachelor and PhD degree at Peking University, and then move to Texas A&M University to continue his research as post-doc. In 2015, he took an Assistant Professor position at Peking University. Song has a broad interest in atmospheric chemistry. His research involves both field measurement and laboratory study, focusing on secondary aerosol formation. Specifically, (1) new particle formation and growth mechanism in highly polluted environment: conducting field measurement and chamber simulation to investigate aerosol nucleation and growth, focusing on the roles of organics, and (2) secondary organic aerosol (SOA) formation using several online and offline techniques to investigate the constituents and sources of Semi-/Intermediate Volatility Organic Compounds (S/IVOCs), and their contributions to SOA. In addition, PAM and chamber are used to investigate the SOA formation from anthropogenic emission, i.e., gasoline and diesel engine, Chinese cooking, and biomass burning.