1. survey method: survey method is the most basic and commonly used scientific research method, including questionnaires, data collection, interviews and other forms. Compare, analyze, induce and summarize the obtained large amount of data, and then draw a general conclusion.

2. Literature research method: According to the demand of research purpose, it is the most effective method to grasp the development history, research progress and future trend of the problem to be studied comprehensively and correctly by consulting the literature, and it is also used to guide the research topic and tap the frontier hotspots in tan shan.

3. Empirical research method: According to the needs of existing scientific theory and practice, design experiments to confirm the causal relationship between conditional factors and this phenomenon. Explain the essential relationship between independent variables and dependent variables.

4. Quantitative analysis method: using actual data to study and analyze the differences of the law and other differences of a phenomenon, so that people can have an accurate understanding of the research object, which is conducive to scientifically revealing the law, grasping the essence and clarifying the relationship. Combined with mathematical model, we can predict the future development trend of things.

5. Qualitative analysis: Qualitative analysis of the research object. Induction and deduction, analysis and synthesis, abstract generalization and other specific research methods are used for further thinking processing, so as to get rid of the rough and get the essence, get rid of the false and keep the true, understand the essence of things from the outside to the inside, and finally reveal the internal laws under complex appearances.

6. Experience summary method: summarize and analyze a large number of practical activities in the past, and upgrade them to a general and systematic empirical theoretical method. After constant revision and improvement, we can guide ourselves and others to carry out research. The level of experience has a great relationship with the cognitive ability of the subject.

The significance of this study:

1, which has not been studied by predecessors, is a novel and meaningful topic in the research field and has been ignored by predecessors.

2. The predecessors have studied or elaborated, but expounded the incompleteness and shortcomings of the argument, and the author enriched it or refuted the previous views.