Zhan Qingyuan, male, doctor of internal medicine, chief physician, professor and doctoral supervisor. He is currently the deputy director (presiding) of the Fourth Department of Respiratory and Critical Care Medicine (MICU) in China and Japan Hospital. Doctor, Chief Physician, Professor and Doctoral Supervisor of Respiratory Medicine, Peking Union Medical College. He is good at the clinical treatment of critical diseases, the rescue of respiratory critical diseases such as chronic obstructive pulmonary disease, bronchial asthma, severe pneumonia and ARDS, the withdrawal of ventilator-dependent patients and the diagnosis and treatment of deep fungal infections.