Bull Demon King

Bull Demon King (Chinese: 牛魔王; pinyin: Niú Mówáng), also translated as the Ox King, also-known by his self-proclaimed title the Great Sage Who Pacifies Heaven (Chinese: 平天大聖; pinyin: Píngtiān Dàshèng), and as Dàliwáng (大力王, lit, "King [of] Great Might"/"King Powerful") and as Niú Dàli (牛大力, lit, "Great Might/Powerful Bull/Ox"), is a fictional character from the 16th century novel Journey to the West.
He is the estranged-husband of the Princess Iron Fan and father of Red Boy. He is a demon king originally-based in the "Palm leaf Cave/Grotto" (棕櫚葉洞; Zōnglǘyèdòng), up on "Jade Cloud Mountain" (玉雲山' Yùyúnshān), with his wife, before betraying his wife for a younger demoness, Princess Jade-Countenance, a female Huli jing, of the "Sky-Scraping Cave" (摩雲洞; Móyún-dòng) on "Accumulated-Thunder Mountain" (積雷山; Jīléi-shān/积雷山; Jīléi-shān).
Bull King is a major antagonist of the novel Journey to the West by Wu Cheng'en, and its multiple adaptations. He can be considered the main antagonist in the remake of Journey to the West, despite his limited appearances. He also appears as the main antagonist in the 2014 film The Monkey King and Doraemon: The Record of Nobita's Parallel Visit to the West. He is one of the most popular Journey to the West villains, alongside his wife Princess Iron Fan, his son the Red Boy, the Six-Eared Macaque, and the Baigujing.
He was possibly influenced by Ox-Head, one of the guardians of hell in Chinese mythology.
In the early chapters of the novel, he becomes sworn brothers with Sun Wukong and five other demon kings, the Saurian Demon King (蛟魔王; Jiāo Mówáng), the Roc Demon King (鵬魔王; Péng Mówáng), the Lion Spirit King (獅狔王; Shīnǐ Wáng), the Macaque Spirit King (獼猴王; Míhóu Wáng) and the Snub-nosed monkey Spirit King (禺狨王; Yúróng Wáng). He is ranked the most senior of the seven, and styles himself "Great Sage Who Pacifies Heaven" (平天大聖).
He later meets and marries Princess Iron Fan and they have a son, Red Boy. He appears again in a later chapter when the protagonists arrive at the Flaming Mountains along their journey. Sun Wukong disguises himself as Bull Demon King to deceive Princess Iron Fan and takes away her Banana Leaf Fan. The real Bull Demon King visits Princess Iron Fan, who then realises she has been tricked. Bull Demon King disguises himself as Zhu Bajie to trick Sun Wukong and retrieve the fan.
In the ensuing fight against Sun Wukong and Zhu Bajie, Bull Demon King reveals his true form, a giant white bull, and attempts to charge towards his opponents. Heavenly forces, including Devaraja Li, his third son, Prince Nezha and the Four Heavenly Kings all show up, with orders from the Buddha and the Jade Emperor to capture the Bull Demon King. When Prince Nezha fails to vanquish Bull Demon King after repeatedly beheading him (as the Bull Demon King also knew the arts of the 72 Transformations; 七十二變化 / 地煞 / 地煞數; Qīshí'Èr Bianhua, lit. "72 Terrestrial Killers"), he attaches one of his flaming wheels to the Bull Demon King's horns--horrifically burning him and causing him great pain--whilst Devaraja Li uses an "imp-reflecting mirror" (照妖镜; Zhàoyāojìng) to prevent the Bull Demon King from shapeshifting and escaping. After the Bull Demon King is captured, they bring him to Heaven to let the Jade Emperor decide his fate. He is killed after.
The Jade-Faced Princess (玉面公主; Yùmiàn Gōngzhǔ)--or Princess Jade-Countenance--is a female, white-faced Huli jing (a vixen), described as 'lissome' (and compared to legendary court-beauty, Wang Qiang), of the "Sky-Scraping Cave" (摩雲洞; Móyún-dòng) on "Accumulated-Thunder Mountain"/"Hoard-Thunder Mountain" (積雷山; Jīléi-shān). Her late father, a 'fox king of ten thousand years', was the previous master of "Sky-Scraping Cave/Grotto" and "Accumulated-Thunder Mountain" (described as a 'very fine mountain'); when he passed-away with no son, he left everything--his cave/grotto, mountain and a vast fortune--to his only child, Princess Jade-Countenance. Princess Jade-Countenance would then later--2-years prior to her appearance in Journey to the West--after having learned of King Powerful's (the Bull Demon King's) reputation for enormous magic powers, used her equally-enormous inheritance as a dowry to lure him away from his first wife, Princess Iron Fan/Rākṣasī, becoming his second wife/concubine and he (to her mind) her consort over her late father's domain.
She proves to be a female who is highly-jealous of her husband's ex-wife and the fact that he continued to acknowledge and pay a maintenance to his ex-wife (in jewels, precious stones, bolts of silk and satin, firewood and rice). She also proves cowardly, as she is easily scared by Sun Wukong's appearance (when he angrily called her a hypocrite), and by the fact that her sole reason for luring King Powerful/Bull Demon King away from Princess Iron Fan in the first-place was out of desire for a powerful protector. When Sun Wukong's and Zhu Bajie's fight with her husband reaches her mountain--a day and a night after first meeting Wukong--Princess Jade-Countenance, scared again, sent-out the mountains entire army to aid the Bull Demon King. Later, when Sun Wukong and Zhu Bajie break into the Sky-Scraping Cave/Grotto and overwhelmed the household, her husband, the Bull Demon King abandons her and their entire household to their fates by transforming into a swan and taking to the air. Her fate is later revealed by Zhu Bajie who killed her--after Sun Wukong first gave chase after the fleeing Bull Demon King--with one swing of his rake, before burning-out the Sky-Scraping Cave/Grotto.
The statues of the Bull Demon King and Princess Iron Fan have been established at the Flaming Mountains Scenic Area in Xinjiang and have become a popular tourist destination. A statue of the Bull Demon King has been erected at Baima Mountain in Chongqing.