Youqiang Li, associated chief physician, who graduated from Hainan Medical College, has been engaged in radiotherapy for 30 years. He was a visiting scholar in the Department of Radiation Oncology of Sun Yat-sen University Cancer Center and Zhejiang Provincial Cancer Hospital for two years. He is good at three-dimensional conformal intensity-modulated radiotherapy for malignant tumors, and is familiar with comprehensive treatment of malignant tumors, including chemotherapy, radiotherapy, targeted therapy and immunotherapy. He is a standing member of the Radiotherapy Group of the Oncology Committee of the Hainan Medical Association and a member of the Hainan Anti-Cancer Society.