According to the Sampling Method for Doctoral and Master's Dissertations, China will sample 10% and 5% of dissertations awarded doctoral and master's degrees nationwide in the last academic year, and the results will be fed back to the degree-granting units. I know the sampling situation of doctoral students.

A doctoral thesis is an academic thesis written by a graduate student who is pursuing a doctoral degree. It requires the author, under the guidance of doctoral supervisor, to choose the potential research direction that he can grasp and control and open up new research fields.