I think I put a lot of time and energy into writing very well, but they are all articles that I think are very elementary or even naive after reading them, because my tutor thinks that the logic of writing this thing is still not so qualified from a professional point of view, but I also said at that time that after all, it is not bad to write articles with 1 Let's continue to improve it later. I was very complicated at that time. I feel that I have invested a lot of time and energy, and there is not much room for improvement. But after a year or two, I feel that my original 1 article is really not so good.