Luoyang City is bustling and bustling during the day, with busy traffic and foreign traders gathering here; at night, there is singing and dancing here all night long. Many spirits who have cultivated human form also hang around here and no longer concentrate on their cultivation. A rabbit demon in Beimang Mountain obtained the Taoist practice and transformed into a human form. Because of his greed for the prosperity of the world, he settled in the city and took Liu as his surname. This demon is well versed in medical skills and pharmacology, and enjoys the prosperity of the world while dispensing medicine.