Professor Lin Xiang 1 Introduction: 64-year-old, a famous professor of neurosurgery, once served as the director of neurosurgery in Tiantan Hospital of Capital Medical University, engaged in clinical work of neurosurgery for 35 years, a senior and well-known surgeon, who has deep research and attainments in intracranial tumors, hemangioma and spinal cord tumor, published dozens of academic papers and has rich experience in gamma knife treatment of head tumors.