
•President of Chinese Orthopaedic Association(COA) 2010-2013
•President, Asia- Pacific Arthroplasty Society (APAS) 2007-2011
•President, Chinese Orthopaedic Association of Chinese People’s Liberation Army 2005-2010
•Deputy-Editor, SPINE Journal, 2008-present
•Ambassador Editor, International Journal of Spine Surgery, 2011-present
•Active Member, Scoliosis Research Society (SRS) 2009-present
Chinese Editor-in-chief, Journal of Arthroplasty (JOA) 2009-present
•Editorial Board, Clin Biomechaic 2005-present
•Deputy-Editor, Chinese Journal of Surgery. 2007-present
•Deputy-Editor, Journal of Orthop Surg and Res. 2006-present
Vice President and Secretary General, Chinese Acadmcy of Orthopaedic Surgeon (CAOS) 2006-2009
•Chief of the Scoliosis Service, Hospital for Special Surgery
•Attending Orthopedic Surgeon, Hospital for Special Surgery
•Professor of Orthopedic Surgery, Weill Cornell Medical College
•Attending Orthopedic Surgeon, New York-Presbyterian Hospital
•Associate Attending Orthopedic Surgeon, Memorial Sloan-Kettering Cancer Center
•American Academy of Orthopaedic Surgeons
Scoliosis Research Society, President 2009
•North American Spine Society
Spine Society
•American Medical Association

•Elected AOSpine International Board Chairperson (Aug,1st ,2012 )
•Chair, American Orthopaedic Association North American Traveling Fellowship Committee
•California Orthoapedic Association Board or Directors
•Chair, North American Spine Society Continuing Medical Education Committee
•Chairman, International Education, AOSpine Foundation
•ACADEMIC APPOINTMENTS:
•Professor of Orthopaedic Surgery
•Professor of Neurosurgery
•Director, UCLA Orthopaedic Spine Fellowship
•UCLA Center for Health Sciences
•Chief, Spine Service West Los Angeles, Veterans Administration Medical Center 1997 – 2007
•Faculty Member, UCLA Department of Biomedical engineering 2003 - Present

•Director Division of Creative Innovations
•Center of Excellent in Spine Research
•Seay Center for Musculoskeletal Research Texas Scottish Rite Hospital for Children Dallas, Texas. U.S.A
•Associate Professor
•Department of Orthopaedic Surgery
•The University of Texas Southwestern Medical Center Dallas, Texas,U.S.A
•Active member of the Orthopaedic Research Society (North America).
•Associate member of the Scoliosis Research Society.

•Dartmouth-Hitchcock Medical Center, Lebanon
•Spine Center
•Orthopaedic Residency Program
•Fellowship: Texas Back Institute, Plano, TX, Orthopaedic Surgery Spine, 1998-99
•Fellowship: William Beaumont Hospital, Royal Oak, MI, Spine Surgery, 2002-04

Member of North American Spine Society
Member of American Academy of Orthopaedic Surgeons
Member of California Orthopaedic Association
Fellowship: Rothman Institute / Thomas Jefferson University Hospital 2004 Philadelphia, PA