Liu Zixuan has been trying to find a solution for Zhao Yi's severed arm.
Finding a cure for an illness or detox is relatively simple, but reattaching a severed arm is no easy task.
The Holy Medical Scripture has documented many methods for reattaching limbs, ranging from the exaggerated, like the lotus root body used by Nezha in mythology, to the more realistic method of finding an arm with identical meridians.
Matching the blood type is easy, but finding an arm with identical meridians is as difficult as finding matching internal organs. How could something so perfect just be found casually?
As for prosthetics, Liu Zixuan immediately dismissed them. No matter how realistic a prosthetic is, it's still fake and won't benefit a martial artist. In fact, it would be a hindrance in a fight.
