Princess Iron Fan refuses to give Monkey her fan, and at first Monkey is unable to defeat her. With help from Guan Yin, he transforms himself into a bee, which the Princess swallows, and Monkey is able to defeat her from inside. He claims the fan, and the group continues on its journey.
According to Wikipedia:
Princess Iron Fan refuses to give Monkey her fan, and at first Monkey is unable to defeat her. With help from Guan Yin, he transforms himself into a bee, which the Princess swallows, and Monkey is able to defeat her from inside. He claims the fan, and the group continues on its journey.