Originally Posted by
NA-Flyer
You have to clear only Canadian immigration ( very easy and simple process) and I believe your bag will be tagged all the way to HKG so you don't need to pick it up.
The bag will be tagged to HKG, yes, but you
do need to pick it up.
Coming in from US, you need to pick up your bags at the belt in YYZ after clearing immigration, and then you need to drop them off again at the transfer belt before exiting out into the terminal arrivals hall.
If for some reason you carry it out to the terminal, it's no big deal. Just take it back upstairs to the CX checkin and they'll take it off your hands there, and attach an F priority tag for you.
But, if you're arriving early before CX checkin desks open, then definitely pass it off to the transfer belt before exiting arrivals.