Director, Division of Cardiology Internal Medicine Department Taipei Veterans General Hospital Taipei, Taiwan; Professor, Faculty of Medicine National Yang-Ming University, Taipei, Taiwan; Vice- Chairman of electrophysiology subcommittee, Taiwan Society of Cardiology, 2018-; Deputy Editor-in-chief Acta Cardiogenica Sinica (official journal of Taiwan society of Cardiology), 2017-2020; Executive director, Taiwan heart rhythm society, 2017-2019; Chainman of catheter ablation subcommittee, Taiwan Heart rhythm society, 2017-2019.