Thinking about it again, I can't see how any song from the current setlist should be banned even in the Chinese authorities' eyes. Everything is tongue-in-cheek in the current repertoire: "2 Minutes to Midnight" is the only popular Maiden song with real social-political contents -and we are talking about undertones rather than message here. The only other two I can think of that could be thought to come across as "committed" (and even this is a stretch) to audiences are "Fear is the Key" (never played live and unlikely to ever be so) and, from an even more far-fetched perspective, "Wasting Love". Bottom line: Iron Maiden is not Rage Against the Machine, they have hardly anything to fear from censorship.