Make full preparations before convening the defense meeting. At the defense meeting, the questioner should try his best to find out whether the level shown in the paper is true or not. A defense should not only prove that one's argument is right, but also prove that the questioner is wrong.
Answering questions of thesis topics:
1. Why did you choose this topic?
2. What is the significance and purpose of studying this topic?
3. How is the basic framework and structure of the full text arranged?
4. What is the logical relationship between the parts of the full text?
5. What different views have been found in the process of studying this topic? How do I know these different opinions? How to deal with it?
6. Although it is not mentioned in the paper, what other issues are closely related to it?
After reading the questions provided by Bian Xiao above, we can do more homework in advance in the thesis topic defense, which I believe is worthy of our attention and consideration.