If it is the duplicate check of the school knowledge network, it depends on the number of times the school checks the duplicate for the students. If there is only one chance to check the duplicate, then the paper cannot be revised after checking the duplicate; If there are two duplicate checking opportunities, you can modify the paper after the first duplicate checking, but not after the second duplicate checking, and so on.

If students check the duplicate in advance, no matter how many times they check the duplicate, as long as the school detects the paper before the duplicate check, it can be revised after the duplicate check to ensure that the repetition rate of the paper after the duplicate check reaches the standard.

However, it should be noted that duplicate checking is needed again after duplicate checking to ensure that the repetition rate of the revised paper meets the requirements. If the duplicate check is passed, it is not recommended to revise the paper, because you need to apply for duplicate check again after revision, which may affect the duplicate check result and prevent you from applying for excellent papers.