魔獸世界沒沒沒沒沒沒沒沒

http://www.thottbot.com (only english)
inside have up to 99.9% of the quests incl. step n ppl tips. Also if your quest about quest items. It'll show you which mob'll drop higher chance

http://wow.allakhazam.com/ (english)
some of the quest have chinese visions

both have quests location or location code. they'll show which npc giver , where to do the quest n who to hand in. For me, I use allakhazam for normal quests.. but if u looking for prof. or class quests thootbot'll give you more result n tips