Dr. Eric Liou is an associate professor in the Department of Craniofacial Orthodontics, and Graduate Institute of Craniofacial Medicine of Chang Gung University, Taipei, Taiwan. For the profession affiliations, He, currently, is the IPP of Asian Pacific Orthodontic Society, Editor in Chief of APOS Trends in Orthodontics, and ECM of WFO. His main academic researches and presentations are mostly on TADs, Class III orthognathic camouflage treatment, treatment of occlusal cant and facial asymmetry with yin-yang arch wires, maxillary orthopedic protraction, surgery first orthognathic approach.