The pilgrims were advised by the locals near the Flaming Mountain to borrow Princess Iron Fan's magical fan to put out the fire and pass. The princess had married Bull Demon King and given birth to Red Boy. When the monkey asked to borrow her fan, she turned him down and blew him over fifty thousand miles away with it. The monkey played a trick to get into her stomachand forced her to give up the palm-leaf fan. However, she gave him a fake one that only fueled the flames. The monkey then transformed into Bull Demon King to get the real fan. Upon hearing the news, Bull Demon King disguised himself as Pigsy to take back the fan, leading to a fight with the monkey. With the help of deities, the monkey finally defeated Bull Demon King, got the fan from Princess Iron Fan and put out the flames.