MC is gifted with photographic memory and an ability to understand & comprehend.
He can xiuxing. It’s the method to cultivate. However, it seems he can’t advance fast enough to defy his fate and survive his illness.
It starts out with a boy waking up from a ten years slumber. He remembers barely anything. Meets the people in the 'village' where he was in during his sleep. Then, a young girl appears. She's an outcast due to her hair color which is white (reason explained in novel, don't wanna spoil too much) and her ruined face which has long scars in a X shape. The MC is intrigued by her and then goes to talk to her. After finding out that she is similar int he aspect of not remembering much, he decides to take her as his sister to protect her.