The general error is within 3-5%, and the duplicate checking system of HowNet will automatically identify it. Statements, tables of contents, footnotes and references are not involved in the detection, and it is not considered as repetition rate. However, due to the problems in pdf transcoding, it will lead to detection errors and inaccurate duplicate checking results. In order to avoid these unnecessary risks, the word format is recommended for online graduation thesis check, so that the system can better identify it, and this format is also the most friendly format for HowNet. Except that some schools require uploading documents in pdf format for testing, in this case, only pdf can be used, which is exactly the same as that of schools and is convenient for targeted modification.

The biggest drawback of duplicate checking in PDF format is that footnotes will be duplicated! PDF will be marked with red references because it can't recognize the format (punctuation) of the references.

The duplicate checking rate of PDF is usually slightly higher than that of word. Footnotes marked in red cannot be modified. Write as few footnotes as possible and put them in the references.

Repeated checking of PDF may display garbled codes, especially when using Apple system. Word and PDF have the same rules for identifying the format of references. The key to avoid marking references in red is not to use Chinese punctuation marks.

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