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Ruyi True Immortal

Also known as:
Ruyi True Immortal Brother of the Bull Demon King

The younger brother of the Bull Demon King and uncle to Red Boy, Ruyi True Immortal occupies the Gathering-Immortals Monastery on Jieyang Mountain, where he profits from the control of the Fetus-Dispelling Spring.

Ruyi True Immortal Fetus-Dispelling Spring Mother-Child River Jieyang Mountain Gathering-Immortals Monastery Puer Cave Ruyi Hook Brother of the Bull Demon King Uncle of Red Boy Journey to the West Chapter 53
Published: April 5, 2026
Last Updated: April 5, 2026

"You harmed my nephew, Red Boy; I hate you too much to even consider lending you water!" — In Chapter 53, when Ruyi True Immortal speaks these words to Sun Wukong, his Ruyi Hook is already barred across the mouth of the well. This is not merely a common demon blocking the road for robbery; this is an uncle demanding accountability for a nephew who was taken away. As the wind of Jieyang Mountain blows across the dilapidated plaque of the Gathering-Immortals Monastery and the waters of the Fetus-Dispelling Spring flow silently at the bottom of the well, Wukong wants only a bucket of water, but Ruyi True Immortal wants an explanation. The root of this conflict lies not beside this well, but hundreds of miles away in the Withered Pine Ravine—on the day Red Boy was taken by Guanyin, a nail was driven into the heart of every member of the Bull Demon King's clan, and Ruyi True Immortal was simply the first to reveal that nail.

The Bull Demon King's Brother: The Forgotten Number Two of the Bull Clan

In Journey to the West, the Bull Demon King is a recognized titan of the demon world, known as the "Great Sage Equaling Heaven," possessing vast connections and immense power; even Wukong, during his own days as the "Great Sage Equal to Heaven" on Flower-Fruit Mountain, swore brotherhood with him. The Bull Demon King's family ties are detailed extensively throughout the novel—his wife Princess Iron Fan, his son Red Boy, and his mistress Jade-Faced Fox—yet his own brother, Ruyi True Immortal, appears only once in Chapter 53. He occupies barely a few pages of text and never appears again.

The insignificance of Ruyi True Immortal's presence creates a strange contrast with the closeness of his bloodline. He is the Bull Demon King's biological brother and Red Boy's biological uncle; in terms of kinship, he is closer to the Bull Demon King than Princess Iron Fan. However, Wu Cheng'en's treatment of this character is extremely restrained—there is no account of his origins or cultivation, no description of his appearance or physique, and no direct interaction arranged between him and the Bull Demon King. Even the Bull Demon King himself, during his great battle with Wukong at the Flaming Mountain, never mentions a word about this brother. Ruyi True Immortal is like a name deliberately faded on the Bull Demon King's family tree, existing solely to obstruct Wukong for a moment in Chapter 53.

Yet, it is precisely this "disposable character" treatment that lends Ruyi True Immortal a more authentic texture. Is this not how family dynamics work in reality? The eldest brother enjoys boundless glory, the nephew causes trouble, and the less distinguished younger brother tends to his own small plot of land, living a quiet life at a distance from the family center. Ruyi True Immortal does not live in the Bull Demon King's Fire Cloud Cave on Mount Jilei, nor in Princess Iron Fan's Banana Leaf Cave on Emerald Cloud Mountain; he dwells alone in the Gathering-Immortals Monastery on Jieyang Mountain—a place far from the family core, sustaining himself through the exclusive business of the Fetus-Dispelling Spring. He is not a "connected" relative relying on his brother's power, but an independent individual with his own territory and livelihood.

The Daoist name given to him by Wu Cheng'en is also worth pondering. "Ruyi True Immortal"—"Ruyi" implies being at ease and following one's heart, while "True Immortal" is a self-appellation of a practitioner. This title sounds ethereal and refined, creating a subtle irony against his actual identity: a bull demon who has seized a well to profit from its water. He renamed the "Child-Breaking Cave" to the "Gathering-Immortals Monastery" and packaged himself as a cultivating immortal, but all he did was monopolize a well with special properties, earning offerings by selling water to wretched souls carrying ghost-fetuses. This practice of "hanging a sheep's head to sell dog meat" is not uncommon among the demons in Journey to the West—countless spirits use "cultivation" as a facade while spending their days seizing mountains as kings and collecting local taxes.

From another perspective, Ruyi True Immortal is not entirely without merit. Unlike other demons, he does not roam about eating, kidnapping, or harming people. He guards the Fetus-Dispelling Spring as a business; if those who come provide offerings, he gives water; if not, he does not. Ultimately, this is a matter of "monopolistic operation," not "murder and robbery." In the region of the Mother-Child River, those carrying ghost-fetuses must either buy water from him to dispel the fetus or be forced to give birth to the child—he provides a service that, while arrogant, is indeed effective. Had Wukong not come for water and unearthed the old grudge regarding Red Boy, he likely would have continued his peaceful existence as the "Fetus-Dispelling Spring Water Supplier" on Jieyang Mountain.

The Gathering-Immortals Monastery and the Fetus-Dispelling Spring: A Unique Business

The Mother-Child River is one of the most peculiar geographical settings in Journey to the West. In Chapter 53, when Tang Sanzang and his disciples reach the borders of the Kingdom of Women, Tang Sanzang and Zhu Bajie become thirsty and drink the water of the Mother-Child River, only to suffer excruciating abdominal pain shortly after—the river water has a strange effect: anyone who drinks it becomes pregnant. This setting is logical within the context of the Kingdom of Women; since there are no men, the women of the kingdom have relied on the Mother-Child River for generations to propagate their descendants; the river is their "source of fertility."

However, where there is pregnancy, there must be an option for "non-pregnancy." While the Mother-Child River causes one to conceive a ghost-fetus, the Fetus-Dispelling Spring can dissolve it. This well is located within the Gathering-Immortals Monastery on Jieyang Mountain; the water is cool and sweet, and a single sip can abort the pregnancy caused by the Mother-Child River. For the women of the Kingdom of Women, the Fetus-Dispelling Spring is essentially a natural form of contraception—when they do not want a child, they simply spend some money to fetch a bucket of water from Jieyang Mountain.

Ruyi True Immortal recognized the potential of this business. The original text does not explain when he arrived at Jieyang Mountain, how he discovered the efficacy of the Fetus-Dispelling Spring, or how he seized the well from its original owner. We only know that upon his arrival, he renamed the "Child-Breaking Cave" to the "Gathering-Immortals Monastery," established himself as the authority there, called himself "Ruyi True Immortal," and monopolized the entire supply of the Fetus-Dispelling Spring. Want the spring water? Very well. First, pay the customary fees and gifts, and only then will he allow you to draw water. How much to draw, how much to pay, and when to pay—it all depends on his word.

In modern terms, this business model is called "controlling upstream resources and monopolizing pricing." The Fetus-Dispelling Spring is irreplaceable—there is no other cure for the ghost-fetuses caused by the Mother-Child River. By controlling the sole source of the antidote, Ruyi True Immortal effectively held the fates of everyone in the Mother-Child River basin who had conceived a ghost-fetus. He did not need to rob or kill or steal treasures; as long as he guarded this well, wealth would flow to his door in a steady stream. This is perhaps the most "business-savvy" operational model among the demons in Journey to the West—relying not on violence, but on monopoly.

More subtly, the "service" provided by Ruyi True Immortal exists in a moral gray area. The Fetus-Dispelling Spring water does indeed help people escape the misery of the ghost-fetuses, and his collection of payment in exchange for water could barely be considered an "equivalent exchange." The problem, however, is that the pricing power rests entirely with him—you must pay whatever he demands, or you will be given no water and forced to endure the pregnancy. This monopoly, where "you have no choice," transforms a transaction into a form of disguised coercion.

In Chapter 53, when Wukong finds the Gathering-Immortals Monastery to fetch water, a young Daoist reveals the truth: to obtain the spring water, one must "pay the customary fees and gifts, and invite Ruyi True Immortal to come out and perform the magic and recite the incantations, only then can the water be obtained." "Perform the magic and recite incantations"—Ruyi True Immortal even manipulated the process of fetching water, packaging the simple act of drawing from a well as a "ritual" requiring a specialist to preside over, thereby further raising the threshold and the price of the service. This tactic is all too common in the real world: complicating a simple matter to make the consumer feel that they "cannot do without me," and then charging a premium with a veneer of legitimacy.

Avenging the Nephew: The Familial Aftershocks of Red Boy's Capture

When Ruyi True Immortal blocked Wukong from collecting the water, the words he spoke most often were not "my well, my water," but rather "my nephew, my revenge." The impact of Red Boy being taken by Guanyin within the Bull Demon King's family was far deeper than it appeared on the surface.

Consider Red Boy's fate. In Chapter 42, Red Boy fought a great battle against Wukong at the Fire Cloud Cave in Withered Pine Ravine, using the True Samadhi Fire to burn Wukong mercilessly. Wukong summoned Guanyin Bodhisattva, who subdued Red Boy using a triple-pronged approach—the Heavenly Transformation Blade, the golden fillet, and the lotus throne—and took him as the Sudhana Child. From the Buddhist perspective, this was "universal salvation"—giving Red Boy a chance to achieve a positive fruit and follow the Bodhisattva in cultivation, promising a boundless future. However, from the perspective of the Bull Demon King's family, the nature of the event was entirely different: their son and nephew had been forcibly taken away through violence.

When Red Boy was taken, the Bull Demon King was not present, Princess Iron Fan was not present, and Ruyi True Immortal, naturally, was not present. By the time they received the news, Red Boy was already wearing a golden fillet and kneeling before Guanyin as an attendant. This "act first, report later" approach is a grave offense in any cultural context that prizes familial bonds. Guanyin did not consult the Bull Demon King, did not ask for Princess Iron Fan's opinion, and did not even notify any family members—she simply struck, captured him, and carried him away.

Put yourself in the position of Ruyi True Immortal. Your own nephew, the only son of your elder brother, was forcibly taken by a person brought by a monk (Wukong) in league with a Bodhisattva (Guanyin). The child is now a "child attendant" to the Bodhisattva; nominally he is cultivating, but in reality, he cannot return home. His father, the Bull Demon King, is far away at Mount Jilei, unable to reach him; his mother, Princess Iron Fan, keeps watch at Emerald Cloud Mountain, unable to do anything but weep daily. The entire Bull Demon King family faced a situation where there was nowhere to even lodge a protest—if you seek justice from the Bodhisattva, she says she is "converting" your nephew. If you complain to the Buddha, the Buddha will say the Bodhisattva did the right thing. If you petition the Heavenly Palace, the Heavenly Palace and the Buddhist fold are on the same side.

This sense of helplessness accumulated in Ruyi True Immortal's heart, turning into a surge of resentment with no outlet. Therefore, when Wukong appeared before the gates of the Gathering-Immortals Monastery, Ruyi True Immortal's reaction was not "who goes there," but an immediate recognition of Wukong and a dredging up of old grievances. He had likely waited a long time for this opportunity. He knew he could not defeat Wukong and knew he could not change Red Boy's fate, but there was at least one thing he could do—deny Wukong the water. You stole my nephew, so I will make your life miserable. This is the only thing a weaker party can do to a stronger one—create trouble within the narrow scope of their own remaining control.

In this context, the weapon known as the "Ruyi Hook" takes on a symbolic meaning. A hook is an action of pulling back. What Ruyi True Immortal wished to pull back was perhaps not just Wukong's weapon, but the nephew who had been taken away. Yet, a hook is ultimately no match for a staff, just as his anger could ultimately not change reality.

Related Characters

Familial Connections:

  • Bull Demon King: The elder brother of Ruyi True Immortal and the demon world powerhouse "Great Sage Equaling Heaven." Though the two brothers held separate territories and did not interfere with one another, their blood ties were vividly revealed in the event of Red Boy's capture.
  • Red Boy: The nephew of Ruyi True Immortal, taken by Guanyin Bodhisattva to be the Sudhana Child. This is the fundamental reason for the hostility between Ruyi True Immortal and the pilgrimage group.
  • Princess Iron Fan: The sister-in-law of Ruyi True Immortal, who also harbored a grudge against Wukong due to Red Boy's capture, later refusing to lend the Plantain Fan at the Flaming Mountain.

Opponents:

  • Sun Wukong: The direct opponent of Ruyi True Immortal. After two clashes before the Gathering-Immortals Monastery, Ruyi True Immortal was ultimately defeated under Wukong's overwhelming martial power.
  • Zhu Bajie: Assisted Wukong in dealing with Ruyi True Immortal, launching a flank attack during the second encounter and disrupting Ruyi True Immortal's footing.
  • Sha Wujing: While Wukong and Bajie were locked in fierce combat with Ruyi True Immortal, he slipped into the Gathering-Immortals Monastery and successfully retrieved the Fetus-Dispelling Spring Water.

Indirect Connections:

  • Guanyin Bodhisattva: The one who took Red Boy and the true source of the Bull Demon King family's resentment. However, as Ruyi True Immortal was powerless to hold the Bodhisattva accountable, he could only direct his rage toward Wukong.
  • Tang Sanzang: One of the parties who accidentally drank the Mother-Child River water and conceived a ghost fetus; it was precisely to cure his condition that the conflict at the Gathering-Immortals Monastery was triggered.

Frequently Asked Questions

What is the origin of Ruyi True Immortal, and what is his relationship to the Bull Demon King's family? +

He is the younger brother of the Bull Demon King and the biological uncle of Red Boy. He holds sole command over the Gathering-Immortals Monastery on Jieyang Mountain (formerly the Puer Cave), where he has seized control of the Fetus-Dispelling Spring as his exclusive business. Unlike his…

What is the Fetus-Dispelling Spring, and how does Ruyi True Immortal use it for business? +

The water of the Fetus-Dispelling Spring can neutralize the ghost-fetuses caused by the Mother-Child River water, making it the only means of reversing such a condition within the Mother-Child River basin. Ruyi True Immortal renamed the site the Gathering-Immortals Monastery and monopolized the…

Why did Ruyi True Immortal refuse to give the spring water to Sun Wukong? Was it simply a matter of rules? +

The primary cause was the grudge over Red Boy. His first reaction upon seeing Wukong was to settle old scores: "You harmed my nephew; I hate you too much to even consider lending you water." He knew he was no match for Wukong and could not change Red Boy's fate, but refusing the water was the only…

How did Sun Wukong eventually obtain the Fetus-Dispelling Spring water? +

Wukong and Bajie joined forces in a direct frontal assault on Ruyi True Immortal, breaking his Ruyi Hook. As the two of them engaged him in a fierce struggle to distract him, Sha Wujing took advantage of the chaos to sneak into the Gathering-Immortals Monastery and take the Fetus-Dispelling Spring…

Ruyi True Immortal appears only once in the original novel; what is his significance to the overall narrative? +

His existence reveals the long-term emotional impact that Red Boy's capture had within the Bull Demon King's family. Because of this, Princess Iron Fan hated Wukong and refused to lend the Plantain Fan (Chapter 59), and Ruyi True Immortal refused to provide the water (Chapter 53). These two events…

How did the reactions of Ruyi True Immortal and Princess Iron Fan differ regarding Red Boy's capture? +

Princess Iron Fan, as the mother, reacted with long-suppressed grief and anger, which erupted into a desperate "how could you ever dare approach me again" upon seeing Wukong. Ruyi True Immortal, as the uncle, reacted more directly—immediately bringing up old grievances to block the path, his…

Story Appearances

Tribulations

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