In China, because a large number of the players do not own the computer they use to play games (e.g. Internet cafes), the CD keys required to create an account can be purchased independently of the software package. In order to play the game, players must also purchase prepaid game cards that can be played for 66 hours and 40 minutes. A monthly fee model is not available to players of this region. The licensee for WOW in China, have imposed a modification on Chinese versions of the game which places flesh on bare-boned skeletons and transforms dead character corpses into tidy graves. These changes were imposed by the Chinese government in an attempt to "promote a healthy and harmonious online game environment" in WOW. The Chinese government has also delayed release of the Wrath of the Lich King Expansion, due to what it feels is objectionable content.