Although the undergraduate thesis is rarely retested after 7 years, it does not mean that it does not exist, nor does it mean that it will not be retested after 7 years. You know, last year's academic events, such events, have to check the papers again. If someone reports it and there is evidence, they have to check it again, just like uploading that incident. Sometimes there are superiors who want to check the papers, and sometimes they have to check them again. Or have other special needs. If you want to test your paper, you can still test your paper.
If everyone's undergraduate thesis fails to pass the re-examination after 7 years, then the degree and certificate may also be cancelled. Therefore, it is important that you don't play it by ear when writing your thesis, and then try to muddle through. Maybe one day in a few years, they will spot check themselves. It's best to look up more information, do your own research and write your own ideological research results, so that the paper is more original and you don't have to worry about random checks and random checks.