Herman Chih-Heng Chang received the M.D. degree from Fu-Jen Catholic university, Taipei, Taiwan in 2013. He then completed his residency training as an emergency physician in National Taiwan University Hospital (NTUH) during 2013 to 2018, and the training of board of critical care medicine (2018 - 2020). He also joined the research team of emergency ultrasound which was led by Dr. Lien. He now is a full time intensivist in the Fu-Jen Catholic University Hospital.