Originally Posted by swallowtail

just want to report briefly that it worked out transiting on this A-B-C-D routing. I wouldn't recommend anybody to repeat this, though. It seems to work fine with Air China, but China Eastern did not know anything about TWOV on an A-B-C-D routing. I appeared at the counter in Hong Kong 3 hours before departure and they first wouldn't let me on board saying that I need a visa. I explained to them that I talked to Chinese Immigration at Shanghai Airport on my way to Hong Kong and that they confirmed to me that such a routing is eligible to TWOV. However, I trusted them and did not ask for a written confirmation. So, at the checkin-counter in Hong Kong, after I explained that it is actually legal, China Eastern staff started calling Chinese Immigration, faxing my documents forth and back. Finally, after 2,5 hours of waiting, half an hour before take-off they gave their ok and let me check-in. A horrible experience with a happy ending.