The theoretical basis of graduation thesis refers to the topic theory, research status, experience and predecessors' achievements. The following is the writing method of graduation thesis "Theoretical Basis":

1. Clarify the research questions: First, clarify the research questions, determine the research field and scope of the paper, and find relevant theoretical basis.

2. Access to literature: access to relevant literature, understand the latest progress and research status in the research field, and find relevant research results and theoretical basis.

3. Summary: Summarize and summarize the literature, extract the relevant theoretical basis and research results, and organize them into a systematic theoretical framework.

4. Expounding the theoretical basis: Expounding the basic concepts, main contents and related properties of the theoretical basis selected in this paper, and explaining its connection and applicability with research issues.

5. Cite documents: Cite relevant documents in the paper to explain its role and value in the research, and deepen readers' knowledge and understanding of the theoretical basis.