It will take about two months. When I used to do it, I could only do about ten pages a day at most. If you have a very good foundation, you can also choose some to do it, which will be much faster, but you must pay attention to: true questions! ! ! The real question is king! Understand the real problems of the past ten years and do well in mathematics. Finally, you find that the most important things in graduate school are mathematics and physics. . . .