Generally, it doesn't matter who signs the agreement if the school doesn't specifically ask the legal guardian to sign it, but you have to be clear about the content of the agreement, and you have to bear the consequences if something goes wrong, so if you can contact your parents, please inform them first, and then ask grandpa to sign it.

The purpose of internship safety agreement is to ensure the smooth progress of internship, enhance students' safety awareness and successfully complete internship tasks. With regard to the relevant regulations on the safety of students during their internship, the following safety agreement is hereby signed.