1. Chair and Professor, Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Peking University;
2. Director, MDT Center of Rare and Complicated cases in Oral and Craniofacial region, Peking University;
3. Chair，Department of Oral and Maxillofacial Surgery, International Hospital, Peking University.
1. AO Foundation trustee (2014-2019) and AO CMF International faculty.
2. Chairman in Committee of CMF Trauma and Orthognathic Surgery, Chinese Stomatological Association.
3. A member in Committee of Temporomandibular Joint Disorders & Occlusion, Chinese Stomatological Association.
4. Chairman in OMS Division, of Stomatological Committee of Beijing Medical Association.
5. A Standing member in Committee of Trauma Surgery of Beijing Medical Association.
6. A member of Committee of Cranio-maxillofacial Plastic Surgery, of Chinese Medical Association.
7. Co-Deputy chief in Committee of Cosmetic Surgery and Regeneration Medicine, of Chinese Medical Association.
Mainly engaging in clinical treatment and research of oral and maxillofacial trauma and tumor, specialized in surgical management of cranio-maxillo-facial fracture, surgery of facial deformity and reconstruction of bone defects, surgical management of TMJ ankylosis and joint reconstruction, computer-assisted technique and application.
Published 168 papers on international and domestic publications as a first author or corresponding author. Published 5 treatises as chief editor and participated in the editing of 16 books, undertook a number of national, provincial and ministerial level research grants as well as international cooperation grants.