Am I eligible for the visa-free transit if my onwards flight has a layover also in China?

I fly from Bangkok-Guangzhou on December 15th. I have an onwards flight from Guangzhou-Toronto on December 18th. This flight has a 3 hour layover in Beijing on December 18th, does this layover make me ineligible for the transit permit, as I will technically be leaving Guangzhou (even though I will not be leaving the airport in Beijing)?