According to the theme of your thesis, you can download some graduation thesis or doctoral thesis written by others from some websites such as China Knowledge Network or Wan Fang Data. Personally, I feel that you are better. Then you can see how others write. If you really don't know how to write, just synthesize what they wrote and summarize it. If you want to write in detail, you can continue to look for the works or theories of experts or celebrities on your topic that you have seen in the paper or that you know yourself. . . . . . That's what I wrote, and I passed it, so it's almost there. In fact, there are not many requirements for format and so on. If you look for information slowly, the workload is very huge.