Du Changyou, French Department of Peking University Foreign Studies University: His routine is to write in the morning. He got up early when everyone was still sleeping, so he got up to write and started working at four or five o'clock. At this time (noon), he came out to chat with everyone and had finished his work. That's it. He has this habit.

People often joke that Mr. Ji is like a punctual clock.

Zhang Lixia, Graduate School of Peking University: Every morning after 7 o'clock, you must walk under our window.

Not only does Mr. Ji have a regular schedule, but he also has his own regimen. He once laughed and said that he seldom exercised, and his daily thinking was to exercise his brain.

Peng Jixiang, Peking University: Later, I thought what Teacher Ji said was very reasonable. This exercise actually has two aspects, one is physical exercise and the other is mental exercise. For intellectuals, his mental exercise is actually to consume energy and exercise, and he has been thinking and exercising. From morning till night, it can be said that he is exercising except sleeping. Mr. Ji is also very humorous, so it should be said that this is also the way he lived to be 98 years old. Always think and always learn.