Chief physician, is currently the director of the department of vascular neurology 2, Beijing tiantan hospital, capital medical university. She was engaged in clinical neurology for more than 30 years, and her main research direction is ischemic cerebrovascular disease and intracranial venous system thrombosis. She has organized and participated in the implementation of the "eleventh five-year national science and technology support plan", "973 national key basic research project", "national 863 plan" and other major research. She is one of the authors of the classification of diagnostic criteria for ischemic stroke in China and one of the main advocates of stratified treatment for ischemic stroke. She has won the second prize of the Chinese medical science award in 2011.