The essential difference lies in the difficulty. Some major provinces, such as Shaanxi, have 550,000 candidates. In order to distinguish the differences between students, they choose to use the national paper 1, which is the most difficult. There are 29 candidates in Gansu province, so the national volume 3 is used.

In terms of language, there is basically no difference in the difficulty between the first and third national volumes.

In mathematics, the objective questions in the national volume 1 and the national volume 3 are sub-topics. Although the questions are different, the difficulty is roughly the same.

In English, the difference between them is obvious. It can be seen from the difficulty of listening that it is more difficult to take the national exam.

On the whole, the physics of the national paper 1 is very difficult, and the average candidate can only answer about 70 points. It is not easy to pass the exam and answer 72, but grade three can answer it easily.