In transit at Guangzhou Baiyun Airport

Hello.

Quick question: next year I'll be traveling through the airport and, as my layover time is 12h, I will most likely be offered a free hotel (so I hope, I still need to confirm this). My question is: if I stay for around 12 hours at/near the airport, will I need any visa? Can simply get this '72 hour, visa-free' 'permit'?

Thank you
Adam