I am flying AC from YUL thru YYZ to PEK first time next month, do I have to claim the baggage and recheck at YYZ and how long would it take? Also, approximately how far is the walk from gate 13x to 17x? I checked Person's website and found out they seem to be at two different sides of T1?

Along the same line, for inbound flight, how long does it take to clear Canadian custom (I just got my Nexus and will be using it the first time)

Much appreciated,