Difficult. Freshmen in Shanghai Jiaotong University emphasize independent thinking and innovative consciousness by highlighting the examination of thinking quality, and require students to have strong spatial imagination and problem analysis ability, to grasp the essence of problems, to find the key to solving problems, and to choose reasonable methods to solve problems. But if you don't think carefully, you will still make mistakes, which is still difficult, and the teachers in the examination room are also very strict. It is not difficult to learn math well.