In the early stage, the graduate students of the Department of Mathematics studied relevant theoretical knowledge with their tutors and took turns to give lectures in the same class. They need to prepare their own lessons, and then the tutor may give them a research direction. Then the next step is to read papers related to this direction. Then write a paper, read the paper to find ideas, and report the progress of the paper to the tutor every week. This is the experience shared by netizens online.