I am a China developer, we have a book store app on app store, today I get mail from apple tell me "it includes content that is illegal in China".
Apple did not point out which contents is illegal in China, but we think maybe is the three book from China writer Wanglixiong (the three books at bottom).
Some friends tell me this is not first case, but I still think this maybe because Apple use CDN bring their content to China, so some Censorship, coordinate is part of deal.