Yu Xiaogang

Biodata

Feature	Value
Name	Yu Xiaogang (玉小刚)
Alias(es)	Grandmaster; self-proclaimed “number one spirit theorist” 23 24
Gender	Male
Occupation/Role	Martial soul theorist; Tang San’s direct teacher 40 43
Cultivation	Level 29 Soul Grand Master 23
Status	Alive; later aids Tang San and Tang Hao while they evade the Spirit Hall Empire 86
First Appearance	Chapter 23

Background / History

Yu Xiaogang wandered near the Soul Hunting Forest hoping to recruit talented disciples and validate the theories for which he had long been mocked. Dugu Bo permitted him to accompany Dugu Yan’s hunt for her first soul ring, despite Yu Xiaogang’s poor reputation and limited level-29 cultivation. 23

When asked to advise Dugu Yan’s Jade Scale Snake martial soul, Yu Xiaogang recommended a mild, ten-year Solitary Bamboo. He argued that a toxic beast-type ring would worsen her venom and could lead to deformity or death. 24 Lin Yuan publicly rejected this recommendation, instead urging Dugu Bo to obtain a highly venomous snake-type soul beast exceeding five hundred years. 24 26

Hu Liena’s successful absorption of a 1,400-year first soul ring and Dugu Yan’s later absorption of a 600-year poison ring directly contradicted Yu Xiaogang’s stated first-ring limit. Unable to accept the evidence, he dismissed both cases as abnormal exceptions or the result of forbidden methods. 25 26 27

After Dugu Yan succeeded, Yu Xiaogang attacked the six-year-old Lin Yuan in anger. Lin Yuan defeated him with one punch, broke the bones in his hand, and left him vomiting blood before Yu Xiaogang fled the forest. 27 28

Nine years later, Yu Xiaogang had become Tang San’s teacher in Nuoding City. Tang San’s rapid advancement to level 30 convinced Yu Xiaogang that he could use his disciple’s achievements to vindicate his theories. 40 He brought Tang San to Martial Soul City intending to obtain Bibi Dong’s Twin Martial Souls cultivation method, confidently relying on what he believed was his former influence over her. 41 43

Bibi Dong initially refused to see him and, when they eventually met, treated his request with open contempt. Yu Xiaogang recognized Lin Yuan as the child who had crippled him years earlier, then wagered access to the cultivation method on Tang San defeating Lin Yuan. 42 43 44 Tang San’s loss—against Lin Yuan’s unprecedented purple, purple, black ring configuration—further shattered Yu Xiaogang’s confidence in his own theories. Bibi Dong had both master and disciple expelled from Martial Soul Hall. 45 47

Tang San’s faith in Yu Xiaogang deteriorated after the defeat, particularly when Yu Xiaogang insisted that Lin Yuan’s rings were created through life-shortening forbidden techniques. Tang San asked to be left alone, creating a visible rift between teacher and disciple. 48 Yu Xiaogang nevertheless continued to advise Tang San and Shrek Academy, later proposing formation tactics against the Golden Generation. 71 72 73

Following Lin Yuan’s campaign against Tang San and Tang Hao, Yu Xiaogang helped the fugitives evade the Spirit Hall Empire. He proposed escaping overseas to Sea God Island, where Tang San could pursue further strength before returning for revenge. 86

Appearance

Yu Xiaogang is a middle-aged man whose rigid expression and austere manner reinforce the scholarly image he attempts to project. 23 40

• Initially wears a washed-out gray robe and keeps a buzz cut. 23
• His short hair begins to gray by the time he teaches Tang San in Nuoding City. 40
• Later appears in carefully prepared dark robes when seeking an audience with Bibi Dong. 43
• After his expulsion from Martial Soul City, his formerly neat gray robe is torn and covered in mud and dust. 48

Personality

Yu Xiaogang is intensely prideful about his status as a theorist. He repeatedly presents his conclusions as universal laws, adopts a lofty demeanor when speaking, and reacts with anger when challenged by children or stronger soul masters. 24 25

His confidence frequently turns into denial. Even after Hu Liena and Dugu Yan visibly exceed the limits he taught, he insists that their results are fraudulent, anomalous, or dependent on forbidden techniques rather than reconsidering his conclusions. 25 26 48

He is highly invested in using Tang San’s success as proof of his own worth. This ambition drives his demand for Bibi Dong’s Twin Martial Souls method, his wager against Lin Yuan, and his continued insistence that Tang San will one day validate his teachings. 40 43 44

Theories & Instruction

Ten Core Competencies of Martial Soul Theory

Yu Xiaogang presents his Ten Core Competencies of Martial Soul theory as the definitive framework for soul-ring compatibility and cultivation. 23 25

• He argues that martial soul and soul-ring compatibility is more important than simply pursuing older rings. 23 24
• He states that a first soul ring cannot exceed 423 years without causing fatal backlash. 25
• He promotes the conventional Soul Elder configuration of two yellow rings followed by one purple ring. 47
• He recommended a mild Solitary Bamboo for Dugu Yan’s poison-type Jade Scale Snake martial soul, believing stronger poison would destabilize her body. 24
• His stated limits are contradicted by Hu Liena’s 1,400-year first ring, Dugu Yan’s 600-year poison ring, and Lin Yuan’s three-ring configuration of purple, purple, and black. 25 27 45 47

Tactical Instruction

Yu Xiaogang applies his theories to combat planning, especially while directing Tang San and Shrek Academy. 71 72

• He identifies perceived weaknesses in Hu Liena, Xie Yue, and Yan’s teamwork, intending to disrupt their control, attacks, and soul-power reserves. 71
• He develops a formation strategy that concentrates the team’s power on Tang San. 72
• He later credits Shrek Academy’s draw against the Golden Generation to his “heterologous repulsion and single-core limit amplification” theory. 73

Relationships

• Tang San — Direct disciple and the central proof Yu Xiaogang uses to validate his theories; their relationship fractures after Tang San’s defeat by Lin Yuan. 40 43 47 48
• Bibi Dong — Yu Xiaogang attempts to invoke their past connection to obtain the Twin Martial Souls cultivation method, but she treats him with contempt and orders him expelled. 41 43 47
• Lin Yuan — Primary rival and the person responsible for repeatedly disproving Yu Xiaogang’s theories, crippling him in the Soul Hunting Forest, and defeating Tang San in Martial Soul Hall. 25 27 44 47
• Dugu Bo — Temporarily accepts Yu Xiaogang as an adviser for Dugu Yan’s ring hunt, then rejects and ridicules him after his advice is disproven. 23 25 27
• Dugu Yan — Her successful absorption of a 600-year toxic snake ring contradicts Yu Xiaogang’s recommendation and first-ring limit. 24 26 27
• Tang Hao — Travels with Yu Xiaogang and Tang San while fleeing the Spirit Hall Empire; Yu Xiaogang advises both of them to seek refuge at Sea God Island. 86

Notable Quotes

“The limit for the first spirit ring is, at most, four hundred and twenty-three years!” 25

“I am the number one spirit theorist on the entire continent!” 24

“I will cultivate a true peerless powerhouse! I will use his achievements to prove to the entire world that my theories are absolutely correct!” 27