Xin Su is chief physician, Deputy Director of Respiratory and critical Care Medicine Department at Jinling Hospital of Nanjing University, Professor and doctoral supervisor of Medical School of Nanjing University, a member of respiratory Physicians Branch of Chinese Medical Association, deputy leader of infectious Diseases Group of Respiratory Branch of Chinese Medical Association, deputy chairman of respiratory Branch of Jiangsu Medical Association, and leader of infectious diseases Group. He has been engaged in clinical, scientific research and teaching for more than 20 years. He has rich experience in clinical diagnosis and treatment of pulmonary diseases such as pulmonary infection, copd, lung cancer and respiratory critical disease, and is good at diagnosis and treatment of pulmonary mycosis and refractory pulmonary infection. He has been teaching undergraduate and graduate students a long while, and won the honor of "Excellent Graduate Tutor". Many of his doctoral students and master students have received the honor of "Outstanding Graduate Students" of Jinling Hospital. He has published more than 80 papers in domestic core journals and more than 90 SCI papers, and participated in the compilation of national guidelines such as Guidelines for Chinese Community-acquired Pneumonia in 2016 and Guidelines for Chinese Hospital-acquired Pneumonia in 2018.