The difficulty depends on the following factors: 1. Personal knowledge reserve: the examinee's mastery of the basic knowledge of history, including in-depth understanding and memory of the general history of China, the general history of the world, historical theories and methods, etc.

2. Changes in the difficulty and types of questions: If the specific questions in the annual exam are different in difficulty, or there are more flexible essay questions, the scoring threshold will be raised.

3. Fierce competition: The number of applicants and the overall level will also affect the score distribution. If there were a large number of applicants in that year, the general score was high, and it was relatively more difficult to get a high score of more than 200 points.

4. Review strategies and answering skills: Effective preparation strategies and good answering skills can help candidates play better, thus improving the possibility of scoring.

5. Fraction line setting: The admission line for postgraduate entrance examination will change due to different schools, years and disciplines, so it is necessary to pay attention to the target colleges and the national lines and cinemas of that year, rather than the pure absolute scores.