In fact, every year, there may be three national volumes this year and two next year.
This year's national examination paper is divided into three parts, which were also published a few months before the exam.
The direction of the test questions mainly depends on where you are. If you are in a relatively developed province and city, the test questions don't need such high accuracy to master your knowledge points. The direction of the test questions is to deepen on the basis, mainly testing candidates' flexible use of knowledge points.
Exams in underdeveloped areas usually take one or two biased knowledge points, or are usually relatively rare questions, such as this year's national three volumes. Candidates usually train in the direction of the former, which leads to the difficulty of three volumes this year more than one or two volumes.