I'm flying from SFO- PEK-DEL with a baby and my layover time is 2 hrs at PEK. Will that work for me

Generally speaking, the procedures are:
Arrive at 3F of T3-E → proceed with transfer procedures → pass through the Transit Inspection in special passage in the east or west → take special elevator downstairs to International Departure Level at 2F of T3-E → accept Security Inspection in the special passage → go through the customs sample check of hand baggage if necessary → Waiting & Boarding

The minimum international transfering time is around 60 minutes and you use the same airline company's flight, so I think you can catch your next flight.