My flight is Vancouver, Canada -> Shanghai Pudong -> Taipei, Taiwan, possible to enjoy the 72-hour visa free policy?

I am scheduled to arrive on a Friday at 4:35pm and depart on the following Monday at 4:00pm. If I calculated this correctly, I am JUST under 72 hours!
I have a valid Canadian passport as well as a valid Taiwanese passport to enter Taiwan.
Am I eligible for this visa-free permit?
I was planning on leaving the airport to stay with a friend during the 72 hour period.

Thanks!