Liu is a physical examination teacher, 42 years old this year. By 2023, (teacher Zhao Zhao) Liu is 42 years old. China medical examination training leader, founder of Zhao Zhao education. Graduated from Capital Medical University, studied in new york Special Orthopaedic Hospital, and then worked in the Orthopaedics Department of a well-known 3A hospital in Beijing. He has taught graduate students, undergraduates and international students in medical schools many times.