Come on guys, THINK! You are WRONG and now you are confusing people.

There are THREE choices if coming into T3 international, which horsey is.
1) Regular Immigration Desks: Some for Chinese nationals, some for Foreigners, and one Special/Diplomatic/APEC. The latter queue is the off-hours/backup for TWOV. All these queues lead to the escalators down to the rail link over to Baggage Claim/Customs/Terminal Exit.

2) TWOV Immigration Line. For those wanting to exit the airport or get to the nonsecure side of the terminal, time permitting. Also for those needing to do international transit from T3 to T2 and for those who are lacking their onward boarding pass but have a printout of confirmed itinerary. Also for those who for whatever reason cannot have their bags autotransferred/interlined through PEK but must pickup at Baggage Claim and recheck. This queue leads to the same place as above.

3) International Transit Line. This is the desk that you get to just before the long row of regular Immigration stations. This desk sends you down a hall, downstairs, and directly back to T3 international airside via a security checkpoint. There is no passport stamping and no visa needed. Passing this desk requires that you have the onward flight boarding pass in hand. One would use this desk if you had a fairly limited connection time to a T3 onward international flight and bags were autotransferred onward. Once past this point, you cannot get back around to Immigration again nor get out of the terminal without some sort of official intervention. This is the Chinese version of what in most airports is called "staying in transit airside."

2) and 3) are not the same thing from a physical flow standpoint, from a time-involved standpoint, nor from a passport processing one.