Do I still need a visa if I plan to stay in Beijing for 48 hours with no confirmed tkt onwards.

I have a Canadian passport and I am an airline employee flying from Toronto - Beijing (standby ) then on to Warsaw on LO also standby.
I do not have a confirmed flight to Warsaw but can provide a copy of the standby ticket on LO and a listing on that ailrine for a particular flight. Do I qualify for the free transit if I leave Beijing prior to the 72 hrs?