YUL-PVG and visa-free stay
I'm planning YUL-PVG-NRT-YUL later this year. I'll be staying less than 72h in Shanghai and it looks like I am eligible for a 144-hour visa-free stay in the Shanghai area.
My question is: will AC agents request specific documentation to let me board YUL-PVG, apart from my Canadian passport? Reservation agent just told me "well there are no checks that I know of, but you should check with customs"...