Qixiang Xu completed his PhD studies at the University of Canterbury, Christchurch, New Zealand in 2013. In 2015, he joined the School of Chemical and Molecular Engineering of Zhengzhou University and the Institute of Environmental Science of Zhengzhou University. He has participated in several academic researches: (1) Project work on “Biomass and Coal Co-gasification Characterization” at the University of Canterbury, New Zealand, with the Coal Research Laboratory of New Zealand (CRL); (2) participated in the design, installation and commissioning of the project “Development of Pilot Experimental Device for Rapid Pyrolysis of Biomass”; (3) Air Quality Traceability Analysis of WRF-CMAQ for Agricultural and Forestry Biomass Combustion in Henan Province under the National Major R&D Program “National Atmospheric Special Project—Demonstration of Joint Prevention and Control Technologies for Complex Air Pollution in the Central Plains Urban Agglomeration and Surrounding Areas”; etc. His research interests focus on Gas-Phase Reaction Mechanisms and Aerosol Thermodynamic Studies in Atmospheric Physics-Chemistry; Regional Air Quality Modeling; WRF-CMAQ-Based Air Quality Modeling; Traceability Analyses Based on the Regional Air Model (CMAQ); Ozone and Particulate-Precursor Sensitivity Analyses Based on Direct De-Coupling (DDM); Meteorological/Pollution Studies Based on the Two-Way Coupling of WRF-CMAQ; Computational Fluid Dynamics (CFD) Applications.