International to domestic transfer Beijing Airport - terminal 3

First of all, you have enough time to transfer the flight. Don't worry.
You need to recollect and recheck the luggages.
By the way, the correct transfer procedures are the following.
1: Inspection & Quarantine, Exit and Entry Frontier Inspection
2: Baggage Claim
3: Customs Inspection
4: Going through Transfer Formalities
5: Security check
6: Waiting & Boarding