Just a heads up if anyone is in this situation---
we just flew on AE tickets J class Air China from MEL-PEK-CDG. It took us 2 hrs to transit PEK! It was 6am arrival in PEK and already International transit line had at least 100 people in. By the time we got to the front there were probably 200-300 behind us. Then we took the escalator down into security chaos!! They even had 2 lines moving in opposite directions within the same roped area. We were in J so were near first off our flight. I can't image how long it took for those in Y to transit!