The research direction of the thesis means that students need to have a clear research direction during their school days, or relevant researchers need to declare and write papers. Students at school or related researchers should write papers on the basis of the history of research topics, put forward their own unique or innovative research directions, and enrich the subject knowledge system. To determine the research direction of the paper, we must first explore new research objects, and combine our own interests when writing academic papers, which are completely consistent with our own disciplines. Then we can take this as the research direction and the paper can be successfully completed.