The Six-Eared Macaque (Liu’er Mihou, 六耳獼猴) (fig. 1) is one of the most interesting villains that Sun Wukong faces in Journey to the West. He is an example of the evil twin archetype from world mythology. But unlike modern media which sometimes differentiates evil twins with goatees,—think of Evil Spock from the Star Trek episode “Mirror, Mirror“—this malicious spirit is an exact duplicate of Monkey with the same features, voice, clothing, and fighting abilities. He’s so similar in fact that no one in the cosmos, save the Buddha, can differentiate him from Wukong. But who is he really and where did he come from?
In this article, I suggest that the Six-Eared Macaque is based on Buddhist concepts of mind and nonduality (Sk: advaya; Ch: bu’er, 不二). In addition, I discuss the character’s origin within the book as a former friend of the Monkey King, explain the significance of the six ears to Buddhism, and detail references to him in a 17th-century sequel to Journey to the West. Finally, I describe the character’s influence on the upcoming Chinese video game Black Myth: Wukong (2023).
1. Description of the episode
In chapter 56, Monkey magically disguises himself as a 16-year-old monk and comes to the rescue of Tripitaka, who had been captured by mountain bandits demanding money for safe passage. The bandits let the priest go under the pretense that his young disciple has money. However, Wukong murders the two bandit chiefs with his iron cudgel, causing the remaining thirty or so men to flee in terror. That night, the pilgrims find lodging with an old couple. But they soon discover that the couple’s son is one of the bandits routed by Monkey earlier in the evening. The son returns home with his gang late at night and, upon learning of the monks, hatches a plan to attack them in their sleep. But the old man alerts the pilgrims to the danger and allows them to escape out a back gate. The bandits take chase, catching up to them at sunrise, only to meet their death at Wukong’s hands. Monkey finds the old couple’s son and beheads him as punishment for disrespecting his parents. All of this killing horrifies Tripitaka, who recites the tight-fillet spell (jin gu zhou, 緊箍咒) and banishes Wukong from the group.
In chapter 57, Wukong travels to Guanyin’s island paradise to complain about Tripitaka casting him out from the pilgrimage. He asks the goddess if he can be released from monkhood and return to his old life, but she instead uses her eyes of wisdom to foresee a future event in which Monkey will need to rescue his master. Meanwhile, Tripitaka asks his remaining disciples to find him food and drink. However, in their absence, Wukong attacks the priest, knocking him unconscious with the staff and stealing the group’s belongings containing the travel rescript.  Sha Wujing is sent to the Mountain of Flowers and Fruit to retrieve their things, but Monkey refuses to return the rescript as he wishes to win all of the merit and fame by finishing the quest on his own. Wujing points out that the Buddha will only give the holy texts to the chosen scripture seeker. Wukong, however, shows that he’s prepared for this outcome by parading doppelgangers of Tripitaka, Zhu Bajie, Sha, and the white dragon horse. Wujing kills his double (which is revealed to be a transformed monkey spirit) and attempts to attack Monkey but is forced to retreat. He flees to Guanyin only to attack Wukong once more when he finds him sitting next to the goddess. Guanyin stays his hand and explains that Monkey has been with her the entire time. She then sends them both back to the Mountain of Flowers and Fruit to investigate the double.
In chapter 58, upon seeing the impostor, Wukong rushes forward to attack the double, who defends himself with his “Acquiescent Iron Pole Arm” (Suixin tie gan bing, 隨心鐵桿兵).  The two battle their way through the sky to Guanyin’s island paradise in order to determine who is the real Monkey. But when she attempts to weed out the impostor by reciting the tight-fillet spell, both Wukong’s drop to the floor in pain. In the face of failure, Guanyin sends them up to the celestial realm in the hopes that the deities who fought Monkey centuries ago will be able to tell one from the other. Both of them fight their way into heaven and gain an audience with the Jade Emperor, but not even the imp-reflecting mirror (zhao yao jing, 照妖鏡)  can tell them apart. The two then battle their way back to earth, and when Tripitaka’s use of the tight-fillet spell fails, they fight down to the underworld. There, the judges are unable to find the impostor in their ledgers, but Investigative Hearing (Diting, 諦聽), the omniscient celestial mount of the bodhisattva Ksitigarbha, finally solves the riddle. However, the creature is reluctant to reveal the false Wukong for fear he will use his powers to disrupt the underworld. The bodhisattva therefore sends them to the Western Paradise in India to stand before the Buddha, who instantly recognizes the impostor. The Enlightened One gives Guanyin a short lecture on four spiritual primates that fall outside of the ten categories of mortal and immortal life in the cosmos: 1) the intelligent stone monkey (ling ming shihou, 靈明石猴, i.e. Sun Wukong); 2) the red-buttocked baboon (chikao mahou, 赤尻馬猴); 3) the bare-armed gibbon (tongbi yuanhou, 通臂猿猴); and 4) the six-eared macaque (liu’er mihou, 六耳獼猴). When the Buddha identifies the doppelganger as the fourth kind, the fake Monkey attempts to flee in the form of a bee but is trapped under the Enlightened One’s alms bowl. In the end, Wukong kills the macaque with his cudgel.
2.1. Background in the novel
Lam (2005) reveals that the Six-Eared Macaque is actually Monkey’s sworn brother, the Macaque King (Mihou wang, 獼猴王) (fig. 2), from his younger days as a demon (p. 168).  He explains:
The latter’s other agnomen, “the Great Sage Informing Wind” (Tongfeng dasheng, 通風大聖 …)  suggests further that its ears are as good as the six-eared macaque’s in information gathering. Despite all these archaic or anachronistic traces, however, Monkey never comes to recognize the six-eared macaque as his old sworn brother as is the case with the Bull Demon King” (Lam, 2005, p. 168).
This should come as no surprise considering the spirit copies Monkey’s life, including his early years as a king. Interestingly, Wukong is a macaque himself.
The novel doesn’t mention the original home of the Macaque King, only that Wukong “made extensive visits to various heroes and warriors” while “tour[ing] the four seas and disport[ing] himself in a thousand mountains” (Wu & Yu, 2012, vol. 1, p. 138). The Macaque King could live on anyone of these thousand mountains.
2.2. Significance of the six ears
Yu suggests the macaque’s six ears come from the Buddhist saying “The dharma is not to be transmitted to the sixth ear [i.e., the third pair or person]” (fa bu zhuan liu er, 法不傳六耳) (Wu & Yu, 2012, p. 387 n. 7). He continues: “This idiom is already used in chapter 2 when Monkey assured Patriarch Subhodi that he could receive the oral transmission of the secret formula for realized immortality because ‘there is no third party [sixth ear] present'” (Wu & Yu, 2012, vol. 3, p. 387 n. 7). This phrase refers to a closely guarded secret that must be kept at all cost, something that can only be passed from a qualified teacher to an initiated disciple.
In this case, the Six-Eared Macaque is the second set of ears, for the Buddha states: “[E]ven if this monkey stands in one place, he can possess the knowledge of events a thousand miles away and whatever a man may say in that distance” (Wu & Yu, 2012, vol. 3, p. 115). Who knows how long this creature listens in on Monkey’s life before he makes an appearance. Perhaps he hears Subhuti’s secret teachings. This might explain why the impostor has similar abilities to our hero.
As the embodiment of the “sixth ear”, the Six-Eared Macaque also represents heterodoxy (waidao, 外道; pangmen, 旁們, lit: “side door”), for someone eavesdropping on esoteric secrets without full initiation into a tradition would have an incomplete understanding. And any supernatural gifts derived from subsequent practice, though powerful as they may be, would just be pale imitations of that achieved by true disciples. This concept is featured in chapter 46 when three animal spirits-turned-Daoist priests challenge Wukong to contests of torture, but each dies because their magic is not as strong as Monkey’s. The novel stresses this is because their training was only partially completed under a teacher.  Wukong is more powerful because he completed his training under Subhuti.
2.2. The Ramayana vs. Buddhist philosophy
Hoong (2004) claims the concept of two identical apes fighting each other “evolved from the well-known episode of the Ramayana where Rama was unable to distinguish between [Vali] and the monkey king Sugriva … when the twin brothers were fighting hand to hand” (p. 36 n. 32). This is an enticing suggestion, and indeed the episode is paraphrased in a collection of Buddhist jataka tales translated into Chinese in the third-century,  showing that the story existed in China for centuries prior to the publication of the standard 1592 edition of Journey to the West. However, I should point out that the jataka doesn’t mention the pugilistic primates being identical. In fact, they’re not even brothers. It simply reads, “The following day the monkey fought with his uncle. The [human] king bent the bow and took out arrows … Though far off, the uncle shuddered with horror. He was mighty afraid. He wandered about [a while] and ran away” (Mair, 1989, p. 677). That’s not to say the author-compiler of Journey to the West wasn’t influenced by the tale and independently came upon the idea of twin monkeys. It’s just I think that there are other avenues open to research.
Fig. 2 – The Great Sage and his impostor battle in the Western Paradise (larger version). Artist unknown.
In Chapter 58, the Buddha gives his congregation a sermon on nonduality, discussing existence and nonexistence, form and formlessness, and emptiness and nonemptiness. Just as the battle between Monkey and his double erupts on Spirit Vulture Mountain (fig. 3), the Buddha tells his congregation, “You are all of one mind, but take a look at two Minds in competition and strife arriving here” (Wu & Yu, 2012, vol. 3, p. 113). “One mind” (Sk: ekacitta; Ch: yixin, 一心) is a high-level philosophy and core tenet of many Buddhist schools that refers to a tranquil, immovable mind that encompasses nonduality (Buswell & Lopez, 2014, pp. 1031-1032; Huang, 2005, p. 68). “Two minds” (erxin, 二心) refers to the dichotomy of the “true mind” (zhenxin, 眞/真心), “the original, simple, pure, natural mind of all creatures, [or] the Buddha-mind” and the “illusionary mind” (wangxin, 妄心), “which results in complexity and confusion” (Soothill and Hodous, 1937/2006, pp. 24-25). A poem in chapter 58 specifically associates two minds with confusion. The first two lines read: If one has two minds, disasters he’ll breed; / He’ll guess and conjecture both far and near” (Wu & Yu, 2012, vol. 3, p. 113).
It’s important to remember that Wukong is an embodiment of the “Mind Monkey” (xinyuan, 心猿), a Buddho-Daoist concept denoting the disquieted thoughts that keep man trapped in Samsara.  As his double, the Six-Eared Macaque is also a Mind Monkey. Therefore, I suggest the battle between these twin primates is an allegory for the struggle between the true and illusionary minds within not just our hero but also readers of Journey to the West. After all, Wukong is the true Monkey, while his double, the fake Monkey, lives under the fantasy that he can take the Great Sage’s place and finish the quest on his own. Furthermore, given chapter 58’s emphasis on nonduality, I argue Monkey killing the Six-Eared Macaque in the end represents the blossoming of one mind/true mind by extinguishing the illusionary mind. This fits with Sun’s (2018) suggestion that the killing “is an action of eliminating the monster in him [Wukong], indicating that he is getting closer to achieving Buddhahood at this point in the journey” (p. 25). 
3. Appearance in other literature
The Six-Eared Macaque is mentioned by name twice and referenced once in A Supplement to the Journey to the West (Xiyoubu, 西遊補, c. 1640), a 16 chapter sequel and addendum to the original novel taking place between the end of chapter 61 and the beginning of chapter 62. In the story, Monkey is trapped in a dream world where he wanders from one disjointed adventure to the next searching for a magic weapon needed to clear the pilgrims’ path to India. In chapter ten, he attempts to leave a magic tower of mirrors and becomes hopelessly entangled in a net of sentient red threads that adapt to any transformation he uses to escape. An elderly man claiming to be Sun Wukong, the Great Sage Equaling Heaven, comes to his rescue by snapping the threads for him. But upon hearing the man’s name, Monkey lashes out at him with his weapon, exclaiming: “You rascally six-eared ape! Have you come to trick me again? Take a look at my cudgel!” (Dong, Lin, & Schulz, 2000, p. 87). But after the old man vanishes in a flash, Wukong realizes that he was saved by his very own spirit.
In chapter 12, a blind court singer plays a tune recounting events from the original novel for the enjoyment of Tripitaka and a foreign king. A section of the song goes: “A pair of Sage Monkeys deceived Guanyin” (Dong, Lin, & Schulz, 2000, p. 104). 
In chapter 15, after giving up the quest and becoming a commander for the foreign king, Tripitaka starts amassing an army. Sun Wukong is listed among the generals, but because Monkey is investigating his master’s change of heart, he instead presents himself as his brother, the Six-Eared Macaque:
The name “Great General Sun Wukong” was called. The Tang Priest blanched and gazed below his platform. It happened that Monkey had mixed amongst the army for the past three days in the form of a six-eared monkey soldier. When he heard the three words “Sun Wukong” he leaped out of formation and knelt on the ground, saying, “Little General Sun Wukong is transporting supplies and couldn’t be present. I’m his brother Sun Wuhuan [孫悟幻, “Monkey Awakened to Fantasy”] , and I wish to take his place in battle. In this I dare disobey the Commander’s order.”
The Tang Priest said, “Sun Wuhuan, what is your origin? Tell me quickly, and I’ll spare your life.”
Hopping and dancing, Monkey said:
In the old days I was a monster,
Who took the name of Monkey.
After the Great Sage left the Tang Priest,
I became his close relation by way of marriage.
There’s no need to ask my name,
I’m the Six-eared Monkey, Great General Sun Wuhuan.
The Tang Priest said, “The six-eared ape used to be Monkey’s enemy. Now he’s forgotten the old grudge and become generous. He must be a good man.” He ordered [the minor general] White Banner to give Sun Wuhuan a suit of the iron armor of the vanguard and appointed him “Vanguard General to Destroy Entrenchment” (Dong, Lin, & Schulz, 2000, p. 122).
4. Black Myth: Wukong
Black Myth: Wukong (Hei shenhua: Wukong, 黑神話：悟空, 2023) is an upcoming action RPG by the independent Chinese developer Game Science (Youxi Kexue, 遊戲科學) (Adler, 2020; Skrebels, 2020). A trailer with 13 minutes of gameplay was released August 20th and has garnered over 6.7 million views on YouTube alone (as of 11/4/20) (video 1). It opens on an aged, furry and squint-faced, long-nailed monk (likely Wukong) sitting in a rundown temple and recalling assorted legends about Monkey. One says the hero became a Buddha and stayed on Spirit Mountain; another that he died on the journey and a different figure was given buddhahood in his place; and another still that Wukong is just a fictional character from a story. The monk then tells the viewer, “But you must not have heard the story I’m going to tell”, thus alluding to the unofficial or “black myth” (hei shenhua, 黑神話).
The trailer features a gorgeous, immersive world in which Wukong travels by foot, wing, and cloud battling underlings and demonic bosses. Monkey is shown capable of freezing enemies in place, making soldiers with his hair, and hardening his body to avoid damage, as well as transforming into a cicada (for covert travel and reconnaissance) and a large golden ape (for boss battles). See here for a great explanation of the cultural and literary references in the game.
Video 1 – The 13 minute game play trailer for Black Myth: Wukong.
Interestingly, some characters in the game hint at a second Wukong. For example, a low-level demon boss says, “Hmm…another monkey?” upon meeting Wukong. Later, an earth god sees him and proclaims, “Similar!”, thus alluding to the other Monkey. This mystery comes to a head at the end of the trailer when Wukong goes to strike another character and his weapon is blocked by a staff with little effort. The camera pans upwards along the shaft, passed glowing Chinese characters for the “‘As-you-Wish’ Golden-Banded Cudgel” (Ruyi jingu bang, 如意金箍棒), revealing the Great Sage Equaling Heaven in his golden armor. This implies the “real” Sun Wukong has arrived and the gamer has been playing as a “fake” Monkey the entire time. But who is this figure?
I suggest this fake Monkey is the Six-Eared Macaque. As noted above, this impostor wishes to win all the glory by completing the quest on his own. His exact words read:
I struck the Tang Monk [with my staff] and I took the luggage not because I didn’t want to go to the West, nor because I loved to live in this place [Flower-Fruit Mountain]. I’m studying the rescript at the moment precisely because I want to go to the West all by myself to ask Buddha for the scriptures. When I deliver them to the Land of the East, it will be my success and no one else’s. Those people of the South Jambudvipa Continent will honor me then as their patriarch and my fame will last for all posterity (Wu & Yu, 2012, vol. 3, p. 115).
This would explain why the fake Monkey is traveling alone and why the real Wukong stops him at the end of the trailer.
1) The travel rescript is like an imperial passport that needs to be stamped by each kingdom to guarantee legal passage along the quest to India. It contains an introductory letter from the Tang emperor and the stamps of all the kingdoms already visited.
2) Yu translates the name as “acquiescent staff of iron” (Wu, & Yu, 2012, vol. 3, p. 105). My thanks to Irwen Wong for suggesting the alternative translation. “Acquiescent” or “to fulfill one’s desires” (suixin, 隨心) is a play on the “as-you-wish” (ruyi, 如意) of Monkey’s “‘As-you-wish’ Gold-banded Cudgel” (Ruyi jingu bang, 如意金箍棒).
3) The imp-reflecting mirror is used in chapter six to see through Monkey’s various magical disguises during his battle with Erlang (Wu, & Yu, 2012, vol. 1, pp. 179 and 184).
4) Wukong takes his six sworn brothers in chapter three shortly after establishing his monkey tribe as a military power. The other brothers include the Bull Monster King, the Dragon Monster King, the Garuda Monster King, the Giant Lynx King, and the Orangutan King (Wu, & Yu, 2012, vol. 1, pp. 138-139).
5) Yu translates the name as “Telltale Great Sage” (Wu, & Yu, 2012, vol. 1, p. 157).
6) For example, after he successfully meets a goat spirit’s challenge to boil in oil, Wukong discovers the liquid is somehow cool to the touch during the animal’s turn. Monkey then summons a dragon king who tells him:
[T]his cursed beast did go through quite an austere process of self-cultivation, to the point where he was able to cast off his original shell. He has acquired the true magic of the Five Thunders, while the rest of the magic powers he has are all those developed by heterodoxy, none fit to lead him to the true way of the immortals (Wu, & Yu, 2012, vol. 2, p. 313).
7) This tale, commonly known in English as the “Jataka of an Unnamed King” (no. 46), appears in The Collection of Sutras on the Six Paramitas (Liudu jijing, 六度集經, third-century) (CBETA, 2016), a compilation of karmic merit tales (Sk: avadana) translated into Chinese by the Sogdian Buddhist monk Kang Senghui (康僧會, d. 280). See Mair, 1989, pp. 676-678 for a full English translation.
8) Examples of the term’s use include titles for chapters seven (“From the Eight Trigrams Brazier the Great Sage escapes; / Beneath the Five Phases Mountain, Mind Monkey is still”) and fourteen (“Mind Monkey returns to the Right; / The Six Robbers vanish from sight”).
9) Alternatively, Sun (2018) suggests: “[H]e kills the six-eared macaque because the latter has copied him too closely, the best demon among the ones that Monkey has conquered” (p. 25).
10) I changed the Wade-Giles to Pinyin. All other quotes from this source will be thus changed.
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