Transit Visa For Afghan National Holding a valid Canadian Permanent Residency Card

I have a flight, from Montreal-Toronto-Guangzhou-Colombo.

my layover in CAN is 10:15 mins, do I need a transit visa or not, Help needed please,

I spoke with the China Southern Airline and they said talk to the China Embassy in Canada, I spoke with them too they said" I do not need, I am eligible foe 24 hour transit free visa, If i am not leaving the airport, transit area."


please please help needed, my flight is after 4 days.