Dr. Ruijuan Lyu has been engaged in the diagnosis and treatment of critical and serious illness and related research for 30 years. She is the Deputy Director for Infection Group, Emergency Medicine Branch, Chinese Medical Association, Vice-chairman of Emergency Medicine Branch of Shandong Medical Association, Chairman of Emergency Critical Care Group, and the Vice-chairman of Shandong Emergency Medical Quality Control Center. She is the expert of medical malpractice appraisal of Shandong Medical Association and the TCF of AHA cardiovascular emergency program in Clinical Skills Training Center of Qilu Hospital of Shandong University.