Li Fan didn't have to wait long. When the evil energy in the Jade Clean Bottle was consumed and the ink thread he carried was also exhausted, Lin Xiang's underlying issues became apparent.
Actually, the matter was clear-cut: There was no evil energy in the Taiji Realm by nature. "Non-materials" that don't alter the natural order of the world hardly persist over time, and the same goes for "non-humans"; they simply aren't suited for prolonged existence in this realm.