Time disappears like flowing water. This semester is about to end. Recently I have been busy sorting out all the previous works. Typesetting is really an annoying thing. Not only must I add all the content I have done, but also consider it. Aesthetics, so my page often appears very crowded, but in the end I screened my favorite and most useful content and put it into my final results. I hope everything goes well, and I can take a rest for a day.