Hou, chief physician, professor and doctoral supervisor. He is currently the director of the Department of Dentistry and Endodontics, Beijing Stomatological Hospital affiliated to Capital Medical University, and the director of the Department of Stomatology, School of Stomatology, Capital Medical University. He has undertaken projects such as National Natural Science Foundation, Beijing Natural Science Foundation, National Eleventh Five-Year Science and Technology Support Plan (sub-projects) and Capital Medical Development Research Fund, and published more than 90 papers. Mainly engaged in dental restoration and pulp biology research, good at modern root canal therapy technology, vigorously promote and popularize the application of surgical microscope in root canal therapy.