March 13th: Sorry everyone, due to exam schedule issues and the exhaustion of the manuscript storage box, the update was interrupted for two days. I tried to make up for it tonight, thinking it was for support. It turned out that I was in love and thanked all the babies who collected and left messages. The updates are stable and a large number of manuscripts are saved. You are welcome to jump in. If nothing happens, I will update daily. Sorry dear friends, because I have to start preparing for the re-examination, there is not enough time, so I changed it to daily updates. Sorry everyone. Updated at 10:30 in the morning. February 3: Sorry, I have to update later today. I went to buy New Year's goods with my family, but I have been queuing up until now and still can't check out. February 5: Power outage, delayed to 11:30 pm. Update February 10: I'll buy New Year's goods with my family again. Judging from the situation, I guess I won't be able to leave the supermarket before twelve o'clock. February 12th: Regarding category issues, I will update this evening. The category of this article seems to be wrong. It's on the list! On March 1st, the computer broke and is being repaired urgently. I will try to update at noon.