Kill or invis past several aggressive Ashen alcolytes (level 60^) until you reach the pond area with disciples.
Do as the disciples tell you (no combat involved):
Jun Shan (next to the training dummy at the edge of the pond) asks you punch the training dummy next to him until it breaks.
Lee Chen (sitting on a meditation mat next to the pond) asks you to sit down on the meditation mat. He says nothing to end his step of the quest, the quest log simply updates.
Tao Rae (near a training dummy next to the pond) asks you to learn to take a punch. (You take no damage but you will be knocked back.)