MD, Chief Physician, Master's Supervisor, and Professor. Deputy Director of Medical Oncology. Specializing in chemotherapy, targeted therapy, and individualized precise therapy for gastrointestinal tumors. Experienced in multi-disciplinary collaborative diagnosis and treatment in comprehensive therapy. Possesses unique experience in the treatment of difficult and rare tumor patients with severe underlying diseases and complications. A leading expert of a multidisciplinary team focusing on managing adverse reactions related to immunotherapy. Dr. Zhao has studied at the Columbia University Vagelos College of Physicians and Surgeons, the David Geffen School of Medicine at UCLA, and the University Medical Center Hamburg-Eppendorf in Germany. He has published over 100 papers, including more than 40 as the first or corresponding author and nearly 20 SCI papers. He participated in the compilation of the 'Clinical Application Guidelines for Antineoplastic Drugs' and 'Routine Diagnosis and Treatment in Medical Oncology'. Multiple abstracts have been included in the ASCO Annual Meeting, and he gave oral presentations at the 2017 World Gastric Cancer Congress and the 2012 Asian Oncology Society Annual Meeting. He has received research funding from the CAMS Innovation Fund for Medical Sciences, Medical Science Foundation, CSCO Special Fund, CACA Special Fund, and Peking Union Medical College Hospital Youth Fund, and participated in key projects of the National Natural Science Foundation of China.