Hewen Niu received his bachelor's degree in June 2009 from Lanzhou Jiaotong University. He obtained his doctorate from the College of Earth Environmental Sciences, Lanzhou University, in June 2014. In July, he worked at the State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences. His research interests include cryospheric environment and chemistry, atmospheric carbonaceous aerosol, tropopause aerosols, etc.