Generally speaking, the rule of duplicate checking for graduate papers is that the same part with more than 13 characters in succession is regarded as a duplicate part. For the number of characters repeated continuously, different duplicate checking systems may be different, but it is usually around 13 characters. Therefore, when writing a graduate thesis, we should pay attention to controlling the repetition rate of the thesis and avoid plagiarism and improper citation.

In addition, different schools and institutions may have different requirements for the duplicate checking rate of graduate papers, which is generally between 10%-20%. If the duplicate checking rate of the paper is too high, it may need to be revised or re-defended, or even face more serious consequences. Therefore, when writing a graduate thesis, we need to pay attention to originality and academic integrity to ensure that we can successfully pass the thesis defense and obtain a degree certificate.

It should be noted that there may be differences between different duplicate checking systems, so it is recommended to use the duplicate checking system designated by the school or institution to ensure that it meets the requirements.