Teacher Li has always felt that as a time traveler, since he already knows what will happen in the future, he needs to pay more attention to Teacher Su, a good socialist young man who will suffer from stomach problems in the future, but this concern seems to be too much.
Teacher Su, what's going on with you? I had a wife in my previous life!
Xiaoyu? ! Why are you with Brother Fang? ! Is your wife an old man?
Purpose: Study physics well and contribute to the country