Originally Posted by
Courmisch
I am not surprised that switching from China to Japan is not smooth. The respective pricing structures should be completely different because of the JL/BA/AY trust.
Oh, I didn't notice OP tried to change dest. And yes, the Japan pricing structure is terrible. Infact, they are not combinable - at least online AY won't sell such an openjaw ticket (orig-PVG NRT-orig). AFAIK, there are no publicly available fares to allow it.
-- Added
Just one more reason to be careful when buying tickets from the Japan-JV.