Transiting between T1 and T2 at Shanghai Pudong Airport with different flight tickets?

I have two different flight tickets with Shanghai Airlines and Spring Airlines. I will land on PVG at 4:45 AM at T1, next flight with Spring Airlines to Jeju (CJU) departs same day at 7:45 AM from T2. Is it possible? Will be there some complications? Is it enough time for this connecting flight? I'm citizen from Schengen area.