Professor Johnson Cheng is the Immediate Past President of Taiwan Association of Orthodontists TAO (2017-2018) and the current dean and professor on College of Oral Medicine, Taipei Medical University. He has been the chairman and editor in chief of TAO Journal Committee (2013-2016). He graduated from school of dentistry, Taipei Medical University in 1983 and got Master degree and PhD from the same university in 1995 and 2008, respectively. He practiced in orthodontic department at his hospital and also engaged in teaching and research in his school of dentistry for over 25 years. His major researches were surface treatment of orthodontic TADs and high molecular orthodontic material, esthetic smile in orthodontics, efficient orthodontic treatment of anterior cross-bite, evidence based in orthodontics, etc. He has published over 300 different kinds of academic and clinical papers and been also invited to make lectures about his associated researches around the Asian countries and got an enthusiastic response.