There are about two aspects that will affect the results of repeated inspections:
1, text typesetting
The specific typesetting format is the standard typesetting format required by the school. Keyword cannot be left. For example, the duplicate checking system of "declaration", "catalogue" and "reference" papers is identified by these keywords. If the keyword is added with special symbols, such as brackets, it will also be unrecognizable. Pay special attention to this.
Repeated checking of 2.pdf format
Pdf document format submission detection is not very good either. If there are many footnotes in the pdf, they may also participate in text detection, which is inaccurate. There are also garbled codes in PDF extraction. It is best to submit the document in word format for testing.