Thesis topic selection must have the following key elements: 1. Importance of research: The topic selection should have the importance of research, that is, it can have a positive impact on academic circles or practical applications, fill knowledge gaps or solve practical problems. 2. Feasibility: The project should be feasible, that is, the research can be completed within reasonable time and resource constraints, and the necessary data or information can be obtained for analysis. 3. Innovation: the topic should be innovative, that is, it can put forward novel ideas, methods or theories to expand or break through existing knowledge. 4. Quantification: The subject should be quantifiable, that is, clear research objectives and questions can be established, and these questions can be answered through appropriate research design and data analysis methods. 5. Interpretability: the topic should be interpretable, that is, the research results can be reasonably explained and interpreted, thus providing meaningful insights for academic circles or practical applications. 6. Research resources: The availability of research resources, including relevant literature, experimental equipment, technical support or cooperative institutions, should be considered when selecting the topic to ensure the effective completion of the research work.