That is, I will use the last night of self-study. If I can't write, I don't want to do anything else at all, which means I'm highly focused. If I like math, I don't want to let go of any questions. Not only like math, but also enjoy it. Personally, I feel that mathematics is not like Chinese, and the answers are endless. Mathematics is rational and the truth is unchangeable. I am willing to explore the laws of this world.