1. research background and significance: the defense Committee may ask you about the research background, what is the significance of the research, and how to determine the research objects and problems. ?

2. Research methods and data analysis: The defense committee may ask you what methods were used in the research, what are the rationality and feasibility of the methods, and what are the data sources and data analysis methods.

3. Research findings and conclusions: The defense committee may ask you what your research findings and conclusions are, whether they are in line with expectations, and whether they are different from previous studies.

4. Innovations and shortcomings of the paper: The defense committee may ask you about the innovations, limitations and shortcomings of your research and how to improve it. ?

5. Future research direction of the thesis: The defense committee may ask you what the future research direction of your research is, what problems are worth further study and other related issues. ?

It should be noted that different defense committees may have slightly different concerns, and the specific issues will be different according to the specific research content and direction of the paper. Therefore, before the defense, the author should have enough knowledge of his paper and be fully prepared for the questions that may be asked.