What no one knows is he was a bit unhappy that there was no retirement recognition.

Today is the day that we recognize them and thank them.

All teachers deserve to be recognized for the contributions they make in our classrooms and in our country.

Among the 23 experts who have been awarded "Two Bombs and One Satellite" in China, 6 are alumni of Nanjing University.

And so today, we honor you for your courage, your passion and your commitment.