1, investigation method: the specific materials formed after a comprehensive and detailed investigation and collection of the topics you choose, and then obtained by the naked eye or other auxiliary means such as radar;

2. Observation method: judge the cause and main reference materials of this problem by observing the behavior of the research object, and finally make a research plan, or use a special observation car to test the situation and get the results;

3. Empirical analysis method: the problems found in the study are gradually accumulated through several in-depth studies, and finally improved into scientific analysis or prediction methods.

4. Literature research method: analyze a large number of data collected by yourself, and then compare and process them. Usually, this operation is relatively safe, but this method is more strict.

5. Case analysis: Make appropriate case analysis according to the set research topic, so as to better understand the whole research and improve the research efficiency.

6. Experimental method: On the basis of people's first attempt to study, new knowledge and new achievements are obtained by changing some existing research methods, which can also be called case analysis.

7. Comparative analysis method: As the name implies, it is to study the corresponding relationship between objective things and various research objects, so as to draw a series of similar concepts for promotion, and at the same time encourage everyone to summarize and enrich each article.