I have another question:
A Chinese historical drama in which a girl lives with her grandfather on an arid, barren mountain . There is a magic barrier that she cannot break through until she has trained enough.
I think there is a prisoner chained in a cave, that they are guarding.
A wounded man, a master of martial arts, arrives on the mountain and the girl secretly takes care of him. He shows her a magic mirror glimpse of the outside world, then he leaves. Eventually she leaves the mountain.