In Gaolaozhuang Village, Mr. Gao wanted to find a son-in-law for his youngest daughter but ended up with a pig demon. Many were invited to subdue the demon but all failed. When Xuanzang and the monkey heard that there was a demon in the house on their way to the west, the monkey volunteered to help. The monkey met the pig demon and fought him out of his cave. When the pig demon realized that Xuanzang and the monkey were on a scripture pilgrimage, he immediately revealed to the monkey that he had been waiting for them after receiving instructions from Guanyin. The skeptical monkey demanded the pig demon burn his cave and took him to meet Xuanzang. Xuanzang untied the pig demon and took him as his second disciple. It turned out that the pig demon had been a heavenly marshal but was banished to the earthly world for his misbehavior and was given the religious name "Wuneng" by Guanyin. He was also called "Pigsy."