Dr. Min Fang did his Ph. D. research in Max-Planck Institute for Astronomy and obtained his Ph.D. in Heidelberg University, Germany. After the Ph.D., he did the postdoc research in Autonomous University of Madrid, Spain, The University of Arizona and California institute of technology, USA. His main research interest is observational study of young stars and their protoplanetary disks. His current research focuses on disk wind with high-resolution optical spectroscopy and photometric variabilities of young stars using the data from The Zwicky Transient Facility (ZTF).Planets form from the dust and gas contained in protoplanetary disks around young stars. A study of these young stars and their protoplanetary disks is important for us to understand how the planetary systems, including our Solar System, form. In this talk, I will give a brief overview of the observations on deriving the properties of young stars and the lifetimes of protoplanetary disks in different environments, and studying the accretion activities and disk winds of protoplanetary disks. I will also show how the external photoevaporation driven by the UV photons from massive stars dominates the protoplanetary disk evolution in massive clusters.