World of Warcraft: The Burning Crusade has surpassed one million concurrent users in China. That's the highest concurrency since the game was launched in China in 2005, according to the games developer, Blizzard.

World of Warcraft is a massively multiplayer online (MMO) role-playing game that was released in late 2004 and spawned an expansion pack, the Burning Crusade. Blizzard is presently working on a second expansion pack for World of Warcraft, the Wrath of the Lich King.

Blizzard works with The9 Limited in mainland China. The9 Limited operates online games in China, primarily licensed from other companies such as Blizzard, but has also developed its own proprietary MMO.