Every school has different requirements for duplicate checking. In general, the paper begins with the abstract, and all the contents, text, references, thanks and appendices are repeated. Individual schools only check the text, and some schools do not check the appendix. So there is no way to tell you directly whether to check it or not. Better ask the school. You can also ask your brothers and sisters, they should know this situation.

If you really can't ask, here's a tip. The normal process of paper duplication checking is as follows: each college collects students' papers or submits them to the educational administration system or the library system respectively, and the teacher in charge of duplicate checking directly uploads the whole paper document to the duplicate checking system for repetition rate detection. In other words, the duplicate checking system will detect what is in your submitted document. Therefore, if you upload an attachment to a paper, the attachment will also be detected. If you think the content of the attachment has a high repetition rate, so as not to affect the plagiarism rate of the whole paper, I suggest that you remove the attachment when submitting it for duplicate check.