Duplicate checking is mainly to detect the repetition rate of papers, and the school will stipulate the qualified standards for the repetition rate of graduation papers. Only when it is detected that the repetition rate of the paper is within the qualified range, it is not necessary to modify the paper to reduce the repetition rate, and the paper can directly apply for paper defense. However, even the papers that have passed the re-examination may need to be revised. This is not only to reduce the repetition rate of the paper, but also to improve the quality of the paper. For example, if the argument is unclear, insufficient and unreasonable, it needs to be carefully reviewed and revised.