What is the reason for the change in the title of the paper?
The original topic is too large and wide, so it is difficult to conduct a complete and in-depth discussion in a limited space, and it is also difficult to achieve a comprehensive and profound study of the original topic with the current academic level and research ability of undergraduate graduates. In order to finish the graduation thesis better, the topic of the thesis was revised with the help of the tutor, and one aspect of the original topic was discussed.