Because of all the chaos (from switched providers to government approval) on China's version of World of Warcraft, they haven't actually had a chance to release the Wrath expansion over there yet. They were planning to bring it out ASAP, but that obviously never worked out. But we hear now, finally, that the wait is almost over. They are still going through content checks, and Netease (WoW's new provider over there) says it has some more work to do, but at this point they're aiming for a mid-November release.
This doesn't mean much for us in the rest of the world -- and before you commenters mention goldsellers, know that most "Chinese goldfarmers" actually play on NA/EU servers anyway, and have been doing so even with the outage overseas. It does, however, mean that China's guilds and playerbase at large will finally have access to all of the content we've enjoyed for almost a year (the expansion was released in North America and Europe last November 13th -- remember that?), including death knights, the new Naxxramas, and all of the other Northrend content. The release should be a nice bonus for Netease as well -- they've been working hard to try and get the game up to date, and releasing the current expansion should help bring in a nice group of new customers.