Hey guys,

we found pretty good deals for a flight to Japan from Germany via China to Tokyo. But we are a little hesitant, because we are not sure if we would have to leave the transit area or if there are even passport controls inside the international transit areas. Does anyone know if they check the passports in Shanghai or Beijing when you just have a short layover there?
The problem is that naturally China doesn't recognize Taiwan. For China, my wife is "chinese". As a chinese she shouldn't have a German passport without her resigning her "chinese/taiwanese" citizenship. She has been to China and Hong Kong before when she was younger, so they do have all her biometric data etc.
It's just a little "scary". I don't want my wife getting detained and questioned in a foreign country while we travel with our baby girl.