The theoretical basis and the investigation of labor changes of the Li nationality in this study are all based on literature research, and many conclusions are drawn based on this. For example, by looking up the literature in the database and sorting it out, finding the research perspective of this paper, collecting data from the county records of the ethnic areas of Hainan Province and historical materials of the Ethnic Museum, etc., sorting out the changes in the division of labor of the Li nationality; extracting the theories and viewpoints that support this paper from the literature, etc. Literature research method was used. In addition, the literature research method also provides suitable research methods, existing relevant research results, and research methods for this paper.
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