Thank you very much for your reply.
I have new questions and would like to ask you.
How long does it take to apply for a tourist visa extension?
How long can the extension of the tourist visa be postponed? Is this extension application easy to approve?
Can the parent of the main applicant travel to and from Canada as a tourist before the main applicant has obtained the PR?
Can the parents of the main applicant travel to and from Canada as a tourist after the main applicant has obtained the PR?
After the main applicant gets the PR, how long does it take to apply for the parental reunion?