1, literature review method. This is also a common method. A lot of knowledge is obtained by reading a lot of books, documents and newspapers, so the data in this paper is no exception. Many papers cite documents from various books.
2. Observation and inquiry method. You can get information by consulting others, and the authors of the same major will have many opinions on this kind of paper, so it is also a good way to ask for advice.
3. Investigation methods. The survey methods also include written survey, questionnaire survey and telephone survey. It takes more time to do investigation, but it also pays more.
4. Experimental methods. Experiment is an essential link in the research of the paper, and a lot of needed information can be obtained through the experiment. The data in the experiment must be preserved, which is also called first-hand information and has many uses. The background, purpose and function of the paper research are very important, and collecting materials from different aspects plays a key role in the writing of the paper.