Compared with the postgraduate examination, the doctoral entrance examination is relatively easy. It usually takes time to brush up on structural dynamics and English. The doctoral exam is not optional. Generally, find a tutor in advance and determine what direction to study. In addition, doctoral graduation is not stopped, depending on how many years you can finish your thesis and whether the tutor will let you go, usually four years.

The latest survey data shows that the delayed graduation rate of doctoral students in China is concentrated in 40%~60%, that is to say, one in every two doctoral students can't graduate on time.