Is there a limit to how many TWOV you can do in a few days?
Example
Ticket #1
Sep 1 HKG-PEK (TWOV #1)
Sep 2 PEK-ICN
Ticket #2
Sep 3 ICN-PVG (TWOV #2)
Sep 4 PVG-TPE
US passport
Alternatively, on one ticket with TWOV
Sep 1 HKG-PEK
Sep 2 PEK-SHA
Sep 3 SHA-ICN
Inbound to PEK and either train or plane to SHA.
Thanks.