thanks for replying,
I still got one month left in my second semester, and also, my after-approval correspondence letter mentions that "validity": xxxx/xx/xx (which is expire date of my permit) and "must enter Canada by" xxxx/xx/xx, which is same as validity. Covid's situation is getting bad again day by day, and I have a feeling that I shouldn't wait much longer. I know there's no guarantee to anything, but if I travel asap, there is only a slim chance that I won't be allowed to enter in Canada, right?