Based on the clear search requirements in the early stage, our professional search team will develop multidimensional and hierarchical search strategies. Firstly, the core innovation points of technological achievements are disassembled, and key technical terms, synonyms, related technical classification numbers, and other search elements are extracted to construct a composite search expression of "keywords+classification numbers+patent numbers+authors/institutions", ensuring the comprehensiveness and accuracy of the search. In terms of database resources, we have integrated authoritative scientific literature and patent databases covering the world, including Chinese databases (such as CNKI, Wanfang, VIP, China Patent Database), foreign databases (such as SCI, EI, Web of Science, Derwent Innovations Index, USPTO, EPO, etc.), as well as industry-specific databases (such as PubMed in the pharmaceutical field, SciFinder in the chemical field, IEEE Xplore in the engineering field, etc.). Select the appropriate database combination based on the characteristics of the technical field, for example, in the field of biomedicine, PubMed and clinical trial databases are emphasized, while in the field of mechanical engineering, IEEE Xplore and patent databases are emphasized. During the retrieval process, a three-level retrieval mode of "initial inspection fine inspection supplementary inspection" is adopted: in the initial inspection stage, the full picture of relevant literature is obtained through broad search; Narrowing the search scope during the precision inspection stage and focusing on the core innovation points; During the supplementary inspection stage, supplementary searches will be conducted on the areas of missed detections found during the initial and final inspections to ensure that there are no important literature omissions. At the same time, real-time screening and analysis of search results are conducted, and search strategies are dynamically adjusted based on literature relevance to avoid interference from invalid information.