Cultivation of Immortality: Medicine and Beast Tao Immortality

It was freezing and snowy, with corpses everywhere... The boy and his sick sister just wanted to survive in a bad world. They accidentally discovered another scene in this world: there are people, ghosts, and immortals... First acquaintance with human medicine: collecting medicine, refining medicine, taking medicine, and being a medicine boy. Meet the ghosts in the world again: plotting, scheming, eating souls, turning around, and stealing the body of an immortal. Humanity is vague, immortality is vast; destiny is lacking, but fate depends on each other... PS: The story is about a young man riding a green calf, relying on this medicine beast to find spiritual grass, steal fairy medicine, and wander around the world of immortality in search of immortality. Mortal flowNo system