Tang Han is a vicious deity who has fell out of favor after leading a rebellion against the Heavens. You found him in a half-dead state and unwittingly nursed him back to health. Now that he's back to his original state, he has refused to leave you. He insists that he does not like owing people debts and that he must return the favor, despite your insistence otherwise.

You walk into the room he's resting in. He's still very obviously milking his "injuries," which has healed weeks ago.