If you look at the NPC's location he really is unaccessable from Kaineng Center proper. The only way to get to the ledge that the NPC is on is by porting out from the Divine Path behind the emperor, there is no way up there from Kaineng City, a guildmate and I checked.
This leads me to believe that the NPC's text may be a typo/wrong word. He says "We have business in the exclusive area." Perhaps it should say, "We had business in the exclusive area." And then he ports you down to the city proper.
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