Yu Xiaogang

Biodata

Power Progression

Background

Yu Xiaogang was born into the Blue Lightning Tyrant Dragon Clan, a family renowned for its Beast Martial Soul. Instead of inheriting its prestigious Martial Soul normally, he awakened Luo Sanpao, a pig-and-dog-like creature associated with a failed mutation. His cultivation stagnated at level twenty-nine, and the clan expelled him 3 39.

Unable to establish himself through strength, he turned to theoretical research. He studied Spirit Hall’s book collection and devoted much of his life to Soul Power circulation, Soul Ring combinations, and ways for Soul Masters to borrow soul beasts’ power. His principal body of work was the Ten Core Competencies of Martial Soul 25 34 64.

At Shrek Academy, he became Tang San’s teacher and devised training plans for the students. His scholarly reputation concealed a deep resentment toward the clan and people who had dismissed him 3 99 100.

Appearance

Yu Xiaogang initially appears as a middle-aged man with a crew cut and a stiff expression. He habitually stands with his hands behind his back, deliberately cultivating an inscrutable “Grandmaster” bearing 64.

• Clothing: Black cloth robes, which he carefully straightens before approaching prospective patrons 64 67.
• Hands: Callused from years of handling ancient books 64.
• Later condition: Emaciated and dressed in filthy, tattered clothing after prolonged poverty in the Great Thousand World 100 149.
• Last appearance: Missing an arm and possessing only one remaining eye; the supplied passages do not establish how he sustained these injuries 148 149.

Personality

Yu Xiaogang is intensely proud of his intellect and treats theoretical recognition as compensation for his lack of cultivation strength. He imagines becoming famous enough to make the Blue Lightning Tyrant Dragon Clan regret expelling him and to force former doubters to acknowledge his superiority 3 64.

He repeatedly explains away evidence that contradicts his worldview. After witnessing overwhelming displays from the Great Thousand World, he alternates between emotional collapse and renewed assertions that Martial Souls, tactics, or his theories can overcome the disparity. Even after admitting doubts privately, he continues presenting himself as an authoritative scholar 16 17 22 39.

His persistence survives repeated rejection, but it is closely tied to his desire for status and powerful patrons. Tang San himself wonders whether his teacher’s refusal to give up represents resilience or an inability to recognize reality 67 69 87.

Abilities & Skills

Luo Sanpao

Luo Sanpao is Yu Xiaogang’s mutated Martial Soul and the source of his original Soul Master abilities 39 68.

• Resembles both a pig and a dog, with a fat body, drooping ears, and an unpleasant smell 67.
• Is described as capable of farting; no detailed combat technique is demonstrated in the supplied passages 39.
• Initially remains connected to Yu Xiaogang’s soul and restricted by his Soul Power 68.
• Becomes an independent spirit beast after consuming a Fire Dragon Body Tempering Pill personally refined by Xiao Xiao. The separation injures Yu Xiaogang rather than strengthening him 68.

Martial Soul Research

Yu Xiaogang studies Soul Rings, Soul Power circulation, Martial Soul characteristics, and dragon-type Martial Souls. His attempt to apply these findings universally is repeatedly challenged by the Great Thousand World’s different cultivation principles 34 64 89.

Training and Coordinated Techniques

• Training plans: Organizes Shrek students’ physical conditioning, including carrying rocks during “devil training” 100.
• Seven-in-One Fusion Skill: Takes pride in this coordinated technique as an exceptional formation-like achievement on the Douluo Continent. Its limitations become apparent when he witnesses a Spirit Array Grandmaster suppress enemies without teammates 142.
• Spirit arrays: Decides to study array manuals after his teaching application fails, believing his memory and calculation skills will suit the discipline. No successful array cultivation is documented 65.

Story Role / Major Arcs

Opposition to the Sky Screen

• Proposed debunking paper: Plans an article titled On the Principles Behind the Sky Screen Illusion and the False Premise of Its Power System. He expects exposing the broadcast as fraudulent to secure worldwide recognition 3.
• Repeatedly overturned predictions: Claims Sword Douluo’s experience and Soul Skills should let him compete in the Sword Domain. The sight of an ordinary willow twig cutting space leaves him collapsing in disbelief 16.
• Defence of the Martial Soul system: Attributes Zhao Wuji’s defeat to poor tactics and Dai Mubai’s defeat to encountering unusually powerful opponents, rather than accepting a fundamental power disparity 17 22.
• Growing loss of authority: Tang San eventually tells him that his theories cannot measure the Great Thousand World. Later demonstrations of creating life, Supreme Dharma Bodies, and self-derived power further undermine his research 25 30 32 34.

Transportation and Failed Teaching Application

• Secret hopes: Despite his public criticism, longs to enter the Great Thousand World, obtain medicine for his bottleneck, and acquire methods capable of improving his bloodline 39.
• Selection: The Sky Screen transports him from Shrek Academy alongside Tang Yuehua and Liu Erlong. On arrival, the surrounding spiritual energy eases the persistent pain caused by his mutation, but no breakthrough occurs 64.
• Northern Spiritual Academy: Applies to become a guest instructor rather than a student. An admissions instructor dismantles his proposed theories, and guards push him into the street 65.
• Change of direction: Resolves to investigate spirit arrays instead, hoping to build a new scholarly career around their calculations and diagrams 65.

Lin Jing and the Loss of Luo Sanpao

• Attempted patronage: Penniless and hungry in Hundred Spirits City, approaches Lin Jing after recognizing her as the Martial Ancestor’s daughter. He hopes she will bring him into the Martial Realm as a theoretical expert 67.
• Presentation of Luo Sanpao: Advertises his Martial Soul as possessing an exceptional mutant bloodline and claims his theories can eventually transform it into a Golden Divine Dragon 67.
• Severed soul bond: Lin Jing feeds Luo Sanpao a Fire Dragon Body Tempering Pill. Its transformation breaks its connection to Yu Xiaogang, leaving him injured and powerless 68 72.
• Approach to Qingzhi: Follows Lin Jing and offers to improve Qingzhi’s dragon bloodline through theoretical guidance. Qingzhi’s overwhelming presence reduces him to trembling submission 69 71.

Survival in the Endless Fire Domain

• Work under Xiao Jiu: Accepts cargo-hauling work to escape starvation and travel toward the Endless Fire Domain. During the journey, Xiao Jiu gives him herbs that replenish his vitality and ease his physical condition 71 72 73.
• Tea-stall work: Washes cups in Flame City. When shock waves from a dragon battle damage the stall, he loses even the security of one meal a day 79 87.
• Dragon Nest Mountain: Enters a restricted supply route without authorization and attempts to diagnose an ill young dragon. Zhu Kun dismisses his explanation and warns him not to trespass again. Yao Lao subsequently identifies a complication in the dragon’s soul-shedding stage 87 88 89.
• Appeal to Oscar: Seeing Oscar welcomed into the Endless Fire Domain’s inner area, demands help on the basis of his former teaching role. Oscar proceeds without acknowledging him. Yu Xiaogang charges the VIP entrance, is struck by a Fire Guard’s attack, and is dragged away injured 99 100.

Reunion with Tang San and Death

• Red Fire City: Reunites with Tang San after surviving through begging, bark, and rotten meat. Both are badly injured, but Yu Xiaogang accepts Tang San’s fabricated account that supreme powers competed for his allegiance and that his injuries are self-imposed “red dust tempering” 148 149.
• Zhao family deception: The pair travel to Azure Rock Town and obtain a meal by presenting themselves as hidden experts. Asked to advise the family’s young cultivator, Yu Xiaogang repeats his theories about Spirit Veins and incompatible attributes 149.
• Exposure: A late Spirit Movement Realm Guest Elder identifies the advice as fraudulent and potentially lethal. Zhao Fugui orders both men beaten to death 149.
• Betrayal: Tang San stabs Yu Xiaogang in the abdomen with a table knife, then falsely claims that his teacher is an evil cultivator who controlled him with poison. Yu Xiaogang dies after recognizing his disciple’s deception and condemning his own judgment 150.
• Destruction of his remains: Tang San later drains his corpse with Demon Vines until it becomes ash, using the absorbed power to reach the late Spirit Movement Realm 150.

Relationships

• Tang San — Disciple and principal source of hope. Their mutual idealization survives repeated failures until Tang San murders him to shift responsibility for their fraud 25 148 149 150.
• Luo Sanpao — Former Martial Soul, intimately connected to his soul before becoming an independent spirit beast 39 68.
• Liu Erlong — Former lover who remains deeply attached to him. She breaks down while watching his humiliation and injuries through the Sky Screen 66 100.
• Bibi Dong — Former romantic attachment whose recognition he hopes to regain through intellectual fame. Watching his public collapse leads her to reassess the man she once pursued 3 100.
• Flender — Shrek colleague who attempts to reach him when the Sky Screen selects him and reacts with shock to Luo Sanpao’s separation 64 68.
• Yu Yuanzhen — Leader of his former clan. Repeatedly condemns Yu Xiaogang’s public claims before the Great Thousand World’s dragon experts 69 88 89.
• Lin Jing — Prospective patron whose interest centers on Luo Sanpao rather than his theories. She ultimately takes possession of the separated creature 67 68 99.
• Xiao Jiu — Employer and guide during his journey toward the Endless Fire Domain; supplies food money and restorative herbs despite a dismissive manner 72 73.
• Oscar — Former Shrek student who refuses to acknowledge his demands for assistance at the Endless Fire Domain 100.
• Zhu Kun — Dragon expert who rejects his mistaken diagnosis but initially spares him punishment for trespassing 89.

Notable Quotes

“There are no useless Martial Souls, only useless Soul Masters.” 39

“An excellent instructor doesn’t need to possess some terrifying level of cultivation.” 65

“I, Yu Xiaogang... spent my entire life studying theory, believing I could see through everything in the world.”
“Yet I never saw that I had raised a man-eating wolf!” 150