Source: http://news.mmosite.com/content/2011-07-13/the_first_85_level_player_emerges_within_2_hours_after_cataclysm_launches_in_mainland_china.shtml

A player has achieved the level 85 just within two hours after Cataclysm, the latest expansion of World of Warcraft, was launched in Mainland China. It is reported that this player comes from Server Scholomance (a WoW server in Mainland China) and his character is a paladin.

According to Chinese media, it is not possible to achieve such a quick leveling speed under a normal condition. Some netizens said this player had taken advantage of an in-game bug which allowed players to submit quests without frequency limitation to speed up leveling.

Anyone knows how to use the bug? XD

it seems no one konw how to use the bug.