Guan Xiangdong, male, director, chief physician and doctoral supervisor of surgical ICU in the First Affiliated Hospital of Sun Yat-sen University. Guan Xiangdong was born in 1962. 1984, graduated from Anhui medical university with a bachelor's degree in medicine; 199 1 year, graduated from Sun Yat-sen University of Medical Sciences, master of medicine, 1997, doctor of medicine. In 2003, he was hired as an ICU professor and doctoral supervisor by Sun Yat-sen University. Engaged in clinical and research of critical care medicine for more than 20 years. So far, more than 20 ICU masters and doctors have been trained.