The data of HowNet duplicate checking system is updated all the time, and the content of database update is uncertain. So some students are in a bad mood and haven't had time to submit them to the school for duplicate check. However, during this period, the duplicate checking database of HowNet will update new contents and improve the duplicate checking rate of papers. Therefore, students should submit it to the duplicate checking system of the school as soon as possible after they pass the duplicate checking.
Some schools have built their own library resources, which have not been submitted to the HowNet duplicate checking system or published papers, so these resources can not be used in the off-campus HowNet duplicate checking system.
Most students don't adjust the content of the text after checking their own duplicates, but they adjust a lot of text formats and paragraphs in the text for the sake of beauty, or the format of school duplicate checking is word. However, other duplicate-checking pdf formats will cause the contents that have not been duplicated before to be duplicated, thus increasing the duplicate-checking rate of papers.