Speak to Jin Li in the other end of The Pillars of Flame north west of The Sun Spires. ( 1550, -114, -1200 ) /waypoint 1550, -114, -1200
Kill the encounter that spawns directly east of Jin Li ( 1515, 0, -1205 ) /waypoint 1515, 0, -1205: a solo harpy named Erilis Windsister and some adds (level 57). Be careful of the heroic mobs that patrol this area.
Note: if you don't kill the Erilis Windsister encounter at this time, and need to spawn it again later, you must delete the quest from your journal and restart it by talking to Shing Ho. (19/07/11 - did not kill them first time and returned and they were still active and I could kill them and got update)