A 96-year-old professor from Nanjing, East China's Jiangsu province, has been giving lessons to medical students since the start of this school year, a practice he has continued since 1988.

The professor, Li Jieshou, stands still for two hours while teaching medical students at Nanjing University.

To give the students the best classes possible, he keeps learning, refers to various the latest published works and keeps revising his lecture notes.

As an academician at the Chinese Academy of Engineering and a professor at the General Hospital of Eastern Theater Command, Li still visits patients every morning on workdays and attends the hospital's weekly case discussion meetings.

He has taught more than 1,600 undergraduates and 300 postgraduates in 31 years, with many of his former students now leading experts in hospitals across China.