Niu is the demon king in China's classical novel The Journey to the West, with a heroic personality. Niu Wangmo is a combination of physical property, magic and human nature. He has vast magical powers, a clear distinction between good and evil, resourceful and fearless. He is a fierce monster, and the only one who passively participated in the war on the way to learn from the scriptures and finally converted to Buddhism.

The owners of Cui Yun Mountain and Jilei Mountain have an iron fan princess as their wife and Hon Hai 'er as their son. It first appeared after the Monkey King got the golden hoop, and later appeared in the story of the Monkey King and the Flame Mountain. In the book, he is called the king of western power and the head of the seven saints.

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The story of the cow:

Turn against each other:

Niu Wangmo married Princess Tiefan, and they gave birth to a son named Hong Haier, who took Princess Yumian as his concubine and got the wealth of Fox King. Hong Haier guarded the fire cloud cave, and the Monkey King dared to eat the meat of Tang monks. Because the Tang Priest and Bajie were taken into the cave, the Monkey King went into the cave disguised as Niu Wangmo, trying to play a trick on Hong Haier. After several wits, Hong Haier was finally accepted as a good boy by Guanyin Bodhisattva.

The Monkey King also began to make enemies with cattle. But Niu Wangmo didn't care that Hong Haier got the right result.