1. Clearly defined research questions: Before starting literature retrieval, clarify your research questions or topics.
2. Choose a suitable retrieval tool: Commonly used retrieval tools include GoogleScholar, WebofScience, CNKI, etc.
3. Determine the retrieval ways and keywords: Choose the appropriate retrieval ways and keywords according to your own research problems and topics.
4. Adjust the retrieval strategy: according to the retrieval results, adjust the retrieval strategy to narrow the retrieval scope.
5. Reading and sorting out documents: When reading documents, you should pay attention to abstracts, introductions, conclusions and references, and sort out the information you need.