The Chinese authorities will hold him until they feel he has given them all he knows, then quickly extradite him to the US. At that point he will probably try to get to Europe. If he makes it, his appeal to those governments on humanitarian grounds may be weakened by the fact the first country he picked practices capital punishment far more than the US (more than every other country in the world combined): http://www…
Snowden: "Leaving the US was an incredible risk, as NSA employees must declare their foreign travel 30 days in advance and are monitored. There was a distinct possibility I would be interdicted en route, so I had to travel with no advance booking to a country with the cultural and legal framework to allow me to work without being immediately detained. Hong Kong provided that. Iceland could be pushed harder, quicker, before the public could have a chance to make their feelings known, and I would not put that past the current US administration."
He was not charged yet when he went to HK.