From the Start, I Find a Manual and Quickly Become a Miracle Doctor

The last batch of Golden Core cultivators left Earth, and cultivators gradually faded from public view. Ancient martial arts sects came to dominate China, and no cultivators ever appeared again, as if they had all been wiped out. In this age when spiritual cultivation was all but impossible, Jin Cheng stumbled upon a sacred medical tome. From then on, he could bring the dead back to life and restore flesh to bare bone. With a mere turn of his hand, he could summon clouds and rain, becoming the greatest immortal physician of his age.