The9 Limited announced today that World of Warcraft recently had a peak concurrency of one million players. The Chinese operator has been handling the Blizzard game in the China region since June 2005. This concurrency number is the highest since the game's original launch.

The game's first expansion pack, World of Warcraft: The Burning Crusade, launched in mainland China on September 6, 2007. The expansion apparently helped draw lapsed players back to the game and attract new players to the experience. A second expansion, World of Warcraft: Wrath of the Lich King, is set to release in the U.S. later in 2008.