In February we came with THAI from Bangkok into PEK and transferred onto UA. Our arriving flight was late so we were literally barreling it through the airport. It is hard to explain but there is an international area with ..... if I can remember 6-8 booths lined up. So anyway we lined up and then were told to go to a different area.........the area is one line to the far left practically against the wall???? That is the best I can explain. Someone else that is more familiar can probably do better as we went through there in a huge rush.
It also seemed we went through security check after security check after security check! I can say it did not take us 2 hours though.