But good times did not last long for she fell seriously ill afterwards. When the emperor visited her, she covered her face with a quilt and said, 'I hope your majesty can take good care of my brother and son for the sake of our past.' But she refused his request of taking a last look at her, 'A woman makes up to please her lover but I am not as good-looking as before and not dressed up. Please leave me as I am.' So finally the emperor went away disappointed. As explained to her maid she said, 'His majesty favors me because of my appearance. I'm no longer pretty with illness and he will forget all my goodness at my sight. But otherwise he'll remember me forever.'

After her death the emperor missed her so much that a necromancer was summoned to call back her spirit. Though his mind racked, the necromancer found no way to meet this expectation. In the evening when pacing up and down in his room, he saw his shadow reflected on the wall. Thus an idea was hit upon. He copied the concubine's picture onto a piece of leather and after coloring and cutting a lifelike silhouette was made. With all the details well prepared, Emperor Wu was invited to the room. From far away, he saw his concubine's silhouette came up slowly and gracefully, knelt down respectfully and remained there. Just as he was approaching, the necromancer stopped him and said the spirit needed a respectful distance. And hundreds of years later Pi Ying Xi was passed down from the descendants of the necromancer.