The directory of PPT is basically the directory in the paper. Generally speaking, you should be the same, and your thinking will be the same as the paper. When you write a paper, the first page of PPT is the title, author and tutor of the paper. The second page is the abstract of your paper, which is also the central idea of the paper. The third page is your catalogue. Your catalogue should highlight your ideas and the framework structure of the paper, which are basically the same, and then discuss your ideas in one step, and be clear. You can insert some systems in the middle to demonstrate. And your defense is usually about 20 minutes. You should have 30 pages. And your PPT should be as simple as possible. Because PPT is generally an auxiliary role, it is mainly explained by you. So if you have too many PPT words, you can't finish reading it, and it's meaningless not to watch you. So you should be highly general, concise and clear, don't talk too much about the background, talk more about your research content. Highlight your central idea and what you want to express.