IIRC the papers didn't talk about Wayne taking a cruise to China, but taking a cruise in a more tropical locale with the ballet cast. Though, one wonders why the dancers didn't talk about the billionaire Wayne ditching the boat at some point to get on float plane. Then we have to wonder where THAT plane took Bruce (presumably to China?) where he changed into his Batman gear somewhere only to have ANOTHER plane with the skyhook system pick him up and somehow the process all has to undo itself.
At some point Bruce has to get back onto the "love boat" with the ballet to finish out that alibi but also Batman has to deliver Chang (?) to Gotham PD/MCU.
I guess Batman DID have a lot of time to prepare the hell out of that operation.