Transit procedure from T-3 international arrivals to T-3 international departures

I am traveling fro DEL to SFO on china airlines through Beijing china capital intl airport (PEK)

i am senior citizen traveling alone first time. what would be the change of flight procedure b/W
CA 948 flight DELto PEK & CA 985 PEK to SFO . My arrival time is 11:25 HRS and departure of connecting flight is 16:00 HRS. both flight are from terminal 3 of PEK intl APT.