Chinese is usually used in daily communication, and the words and language norms reflect personal self-restraint. I'm not stupid after reading a lot of books.

In mathematics, cultivating a scientific thinking is not necessarily to solve problems. Your understanding ability, logical ability and reaction ability are all cultivated little by little, so you won't even understand the meaning of the work assigned by your boss in the future.

Needless to say, English is definitely needed if you are engaged in foreign trade or something. Even teaching children in the future is better than nothing. I don't know any English words when I go out, and I look illiterate.