In the appendix, some relevant rese

In the appendix, some relevant research details can be arranged together as a supplement to the main text. These materials mainly include: questionnaires and questionnaires used to collect data; introduction of mathematical formulas for calculating certain indicators or data; introduction of calculation methods of certain statistics and measurement indexes; introduction of certain survey tools, measuring instruments and computer software ,and many more. Because these materials occupy a relatively large space, this part is often omitted when academic journals are published, while in research reports in the form of dissertations, there must be an appendix.