Do it in the following order (if time is enough, if time is tight, don't read 400 questions, read the whole book twice)

1 Every question in the whole book of Li Yongle or Chen Wendeng should be calculated by hand. It may be difficult at first, but don't look at the answer when you come up, you must think for yourself. It's safer to do it three times, and start the third time after 660.

2 basic clearance 660 questions to investigate knowledge points, check for leaks and fill gaps. I suggest reading the book twice before starting to do it.

Three true questions for the first time

4400 questions

Five true questions for the second time

6 simulate the test paper, such as the last five sets of questions in the University of Technology.