Time to transfer from international flight to a domestic flight?

Hi,
My international flight arrives from Paris at 6: 20 in the morning to Guangzhou. I want to book a flight to go to Hong Kong, how long time does it take to go from international arrivals to take a domestic flight? Is 2 hours reasonable (booking a flight at 8:30 for Hong Kong) or do I need more time for different procedures?
Thanks!
Julia