If you have many certificates, it is best not to attach copies of all the certificates to your resume. A thick resume will make recruiters lose their appetite.
If you submit your resume at a large job fair, don't bring the original to avoid losing it. If the employer needs you to provide it, it can be given another day.
If some units pay attention to certificates, you will be asked to bring relevant supporting materials when you are informed to go for an interview. Or you can take the initiative to ask if you need to bring a certificate for the interview.