1. Whether the graduate students in the department of mathematics prepare for one year depends on the span and what school they apply for.

2. If you have a foundation, it should be enough to apply for non-prestigious schools, but it is definitely not enough to apply for 985 universities such as Peking University and Tsinghua.

3. Graduate students should prepare as early as possible. After all, admission depends on scores, especially in schools in developed areas. In addition, the time limit for preparing for the exam is also related to the efficiency of preparing for the exam.