Prof. Fulai Guo is a faculty member in the astrophysics division of Shanghai Astronomical Observatory (SHAO), currently leading the Black Hole Feedback and Cosmic Ray Astrophysics research group. He received his B.S. degree in astrophysics from University of Science and Technology of China, and a PhD in Physics from University of California, Santa Barbara in 2008. He worked as a postdoctoral researcher at University of California Santa Cruz (UCO/Lick Observatories), and a Zwicky prize fellow at Swiss Federal Institute of Technology Zurich before joining SHAO in 2015. He is a theorist with a focus on numerical simulations. His research interests include supermassive black holes, active galactic nucleus feedback, cosmic ray astrophysics, the circumgalactic medium, the intracluster medium, etc.The circumgalactic medium and feedback processes significantly affect galaxy evolution and are an interesting and hot topic in contemporary astronomy. I will talk about our recent work on this topic in our own galaxy. I will introduce a new general hydrostatic model for the hot circumgalactic medium in the Milky Way, how we may use this model to study the Galaxy, the potential importance of cooling flows in the CGM, and our new forward-shock model for the origin of the Fermi bubbles observed in the inner Galaxy.