World of Warcraft expansions always have a hard time getting into China, like in the case of Burning Crusade, in which "questionable content" delayed its overseas release. The content in question included some torture sequence, another problems being the abundant use of skulls and corpses.
Chinese government regulators with the General Administration of Press and Publication (GAPP) and the Ministry of Culture (MOC) initially revoked Chinese online game publisher NetEase's application for BC. The ban was later lived, and NetEase was fined for "gross violations" of regulations. The WoW expansion was also heavily edited (blood changed from red to black, skulls removed from spikes, etc.) to meet these regulations.
Wrath of the Lich King faced similar changes, including character/creature model edits, like changing a bone dragon into a normal one. Chinese WoW gamers will finally be getting the second expansion later this month.
NetEase CEO William Ding reassured the community that Wrath of the Lich King will still be a fantastic expansion, despite whatever changes were made:
"World of Warcraft is one of the most popular online games among Chinese players, and we believe that the new content in Wrath of the Lich King will generate even more excitement. We are fully prepared on all fronts to provide great service and support to all of the new and returning players throughout China, and we look forward to welcoming them to Northrend."
At least this means the Chinese WoW players will get Cataclysm too, at least in a few years.