How to meet Mu Gong?

How am I supposed to do this quest as Aran now? They changed the level requirement for Mu Lung Dojo to level 90...and the quest is for level 54.

Aran seems to be able to enter the dojo via Bulletin Board (located in some towns, including Mu Lung).

You then have to press up at, I believe, the green flag in the back of the dojo entrance map, which sends you to a special map to speak to Mu Gong.

Edit: Whoops. You might have to speak to So Gong first, in the dojo.