1. Open the paper, first establish a multilevel list, then define a new number under the literature review, and insert the literature to be cited.

2. To set the target style in the numbering format, such as [1], you need to manually add "[]".

3. Then locate the place to quote in the argument, manually enter "[1]", and then select "x 2" at the beginning to set it as the upper corner mark.

4. Next, select the cross-reference under the wake-up menu.

5. Select "numbered item and paragraph number, and select the corresponding cited paper" in the pop-up box, and click OK to complete the citation of the paper.

The research methods of this paper are as follows:

The research methods of this paper are: normative research, empirical research, case analysis, comparative analysis, thinking method, content analysis, literature analysis and mathematical method. Research method refers to the tools and means to discover new phenomena and new things in research, or to put forward new theories and new viewpoints and reveal the internal laws of things.

The research method of this paper is investigation, that is, collecting relevant research objects purposefully and systematically; Observation method refers to directly observing the research object with one's own senses and auxiliary tools; Causal analysis refers to the dialectical thinking method of analyzing the causal relationship between phenomena and understanding the causes and results of problems. There are also experimental methods, induction and deduction methods, empirical research methods, quantitative analysis methods and so on.