Please explain in detail the relevant plot of a carved banana fan in the Monkey King.

Four monks and apprentices, all the way west. Walking, I gradually feel unbearable heat. It's autumn, and everyone feels very strange. I didn't know there was a burning mountain in front of me until I asked, and there was nothing growing within 800 miles of Fiona Fang, Fiona Fang. From the mouth of the boy selling cakes, if you want to cross the mountains, you can only use the banana fan of Princess Iron Fan to put out the fire. Sikong arranged for Master to go to Bajiao Cave to find Princess Iron Fan. Princess Iron Fan is Niu's wife and Hong Haier's mother. Because last time Hong Haier wanted to eat Tang monk's meat, he had a grudge against Sikong, so Princess Tiefan refused to borrow it. The first time Wukong borrowed a fan, Princess Iron Fan used a banana fan.