Dr. Peng Xi obtained his PhD in optical engineering from Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences. He then worked as a postdoctoral Research Associate in Hong Kong University of Science and Technology (2003-2004), Purdue University (2005-2006), and Michigan State University (2006-2007). From 2008 to 2009 he worked at Shanghai Jiao Tong University as an Associate Professor. He is currently working at the Department of Biomedical Engineering, Peking University as an Associate Professor. He has been invited to give several keynote speeches and serve on the scientific committee board of Focus On Microscopy conference. His research interests include optical nanoscopy, multiphoton microscopy, as well as novel biomedical optical imaging techniques.