Dai Xinyi's real identity, German doctor, Ninth People's Hospital affiliated to Shanghai Jiaotong University School of Medicine, rehabilitation attending surgeon. According to relevant data, Dai Xinyi graduated from Nanjing Medical University (Plastic Surgery) with a master's degree in 2006. 2006-20 12 and 20 17-20 19 were employed by the First People's Hospital affiliated to Shanghai Jiaotong University as residents and attending physicians. 20 12-20 16 was sent by the state to study for a doctorate in technical university of munich. In 20/0/4, Kloc was invited by American Plastic Surgeons Association to visit and study in Massachusetts General Hospital affiliated to Harvard Medical School, NYULangone Medical Center of new york University and Johns Hopkins Hospital. 20 16-20 17 conducted postdoctoral research (scar-free regeneration and healing) at the Medical College of the University of G? ttingen, representing the paper published in NPGAsiaMaterials under the journal Nature. 20 19 was supported by Shanghai Pujiang Talent Plan.