After Li Ya's death, he was quite free as a ghost. There were only two shortcomings:
First, no one can see her, ghosts and animals, she is too lonely
Second, her family cut off her incense offerings, leaving her without food or clothing.
Later, she met Dr. Yun Da, and everything that was bad seemed to be turning into good signs, because this Dr. Yun Da could see her!
Later she discovered that Dr. Yun Da could not only see her, but also touch her.
Finally, Dr. Yun Da told her: Your purpose of reincarnation in the lower world is to experience all kinds of flavors in life, but it is a pity that you have lived ten lifetimes without tasting the forbidden fruit.