I want to I transfer from T1 to T2 at Shanghai Pudong Airport.

PVG airprot: We only have 45 mins to transfer from T1 international to T2 international . No luggage, luggage will directly transferred between two airlines. Question:
1. Do we have to get out of T1 and go into T2, that means pass the custom at T1 and pass through the security again at T2
2. Is there a passageway that we can take from T1 to T2? So we can avoid the above?
Thank you.