Perform the following analysis:

1, generally speaking, if you study for a doctorate, you can graduate and get a doctorate by passing various examinations and doctoral thesis defense.

2. After getting a doctor's degree, I will generally go to the corresponding university or research institute and be a postdoctoral fellow for another two years. After leaving the station, you can officially enter the post, teach in the university, engage in scientific research, or enter the research institute to engage in scientific research. But if you are excellent, you can stop being a postdoctoral fellow and work directly. Of course, you can also stay in our school.

3. Summary: After the above analysis, Ph.D. graduates from Peking University can stay in Peking University.