Fei Sun graduated from the First Clinical Medical College of Nanjing Medical University with excellent performance. He has also served at the First People’s Hospital (a 3A hospital in the prefecture-level city) of Suqian City, Jiangsu Province for several years. He studied at the Cardiovascular Intensive Care Unit of the First Peoples Hospital affiliated to Shanghai Jiaotong University from 2013-14, focusing on the diagnosis and treatment of acute, critical and serious cardiovascular cases including coronary artery disease, hypertension, arrhythmia , heart failure, etc.