The repeated citation part of the paper refers to the literature citation part, that is, the research results, viewpoints and theories of other scholars are cited in the paper, and the source is indicated in the paper. Citation is the premise, background and theoretical basis for explaining the research problem, and it is also an affirmation and tribute to the previous research results. Therefore, in the paper search, the citation part does not need to be detected, but it is considered reasonable and necessary.