How transfer to the flight CA 918 ( PEK - EWR ) after my arrival to PEK on flight CA 980 from BKK ?

It's international to international transfer in the same terminal building T3.
The correct transfer procedures are Flight Arrival - Transfer Procedures - Stamped on the Boarding Pass - Security Check - Custom Inspection - Waiting & Boarding.
In general, you need at least one hour to make this connection. :)