Xilu is a ghost that has been dead for more than six hundred years.
She was originally a sika deer shot to death by the prince during the autumn period of the previous dynasty.
She, a deer, had already had spiritual wisdom and had entered into spiritual practice, so she had been working as a ghost in the underworld for hundreds of years.
Until one day, she was forced to bind Shanhaizhu, and she was both prosperous and devastated. He had to travel through various worlds to collect fragments and restore the Mountain and Sea Pearl.