Xu Qi'an (许七安): The Wisecracking Detective Who Quotes Poetry Before Fighting — Character Study & Idioms

Xu Qi'an (许七安) walks into a crime scene in the Da Feng Dynasty, crouches over a corpse, and starts testing for poison using chemistry he learned in a modern Chinese high school. His colleagues stare. They have never seen anyone apply potassium permanganate to a wound before. They have never heard of potassium permanganate. They don't know what a chemical reaction is. Xu Qi'an doesn't bother explaining — he just announces the victim was poisoned, names the poison, and moves on while everyone behind him whispers about dark magic.

This is the central joke of Guardians of the Dafeng (大奉打更人), and it never gets old. Xu Qi'an, played by Dylan Wang (王鹤棣), is a modern police officer who died and woke up in the body of a minor constable in a fantasy dynasty. He carries in his head nine years of compulsory education — 九年义务教育 — which makes him aggressively average by 21st-century standards and an unparalleled genius by ancient ones. He knows basic chemistry, arithmetic, forensic reasoning, and enough classical Chinese poetry to weaponize it. That last part matters more than you'd think.

His full name is 许七安 (Xǔ Qī'ān), courtesy name 宁宴 (Níngyàn). He starts as a constable (快手) in Changle County, gets recruited into the Nightwatchmen — the emperor's secret investigative force — as a Bronze Gong (铜锣), and rises to Silver Gong (银锣). "许银锣" becomes his famous nickname in the capital. It's a title earned through a series of increasingly impossible cases that he solves using a combination of criminal investigation techniques, modern scientific knowledge, and a personality so abrasive that his superiors can't decide whether to promote him or execute him.

His catchphrase before reciting poetry is "退后，我要开始念诗了" — "Stand back, I'm about to start reciting poetry!" He says this with the same gravity another protagonist might use before drawing a legendary sword. In his world, poetry carries real power, and lines from Li Bai and Du Fu land like thunderbolts when channeled through cultivation energy. But the comedy is that Xu Qi'an isn't a poet. He's a plagiarist with a thousand years of someone else's literary canon memorized. Every poem he "composes" was written by someone who won't be born for centuries.

The eight idioms below map the territory of this character — his intelligence, his loyalty, his recklessness, and the moral code he carries from one world into another.

---

明察秋毫 (míng chá qiū háo) — "Perceive the tip of an autumn hair"

The literal image is seeing a strand of fur so fine it's practically invisible — the soft downy hair that grows on an animal in autumn, thinner than a human eyelash. 明察秋毫 describes perception so acute that nothing escapes it. In classical usage, it was applied to judges and magistrates who could detect lies, notice inconsistencies, and see through deception.

Xu Qi'an earns this idiom in the Tax Silver Case (税银案), his first major investigation. A shipment of tax silver has vanished. The local officials have a convenient explanation, the kind of tidy narrative that wraps up with a dead scapegoat and no further questions. Xu Qi'an looks at the same evidence everyone else has looked at and sees what they missed — not because he's smarter in the abstract, but because he applies forensic methodology. He examines physical evidence rather than relying on witness testimony. He reconstructs timelines. He asks the question modern detectives are trained to ask and ancient investigators never think of: who benefits?

He uses chemistry to test the remaining silver, proving it's been adulterated. He traces the shipping routes and finds inconsistencies that only make sense if the theft was an inside job. The case doesn't just solve a crime — it exposes a corruption network that reaches into the capital. This is what brings him to the Nightwatchmen's attention and starts his ascent from a nobody constable to someone the powerful need to worry about.

明察秋毫 applied to Xu Qi'an isn't supernatural perception. It's systematic thinking imported from a world where forensic science exists into a world where it doesn't. He sees the autumn hair because he knows to look for it.

Use it: When someone notices the detail everyone else overlooks — an auditor who catches a discrepancy buried in ten thousand transactions, a doctor who diagnoses a rare condition from a symptom no one else flagged.

---

足智多谋 (zú zhì duō móu) — "Full of wisdom and many stratagems"

足智多谋 describes someone whose intelligence is specifically strategic — not just smart, but resourceful. The person with many stratagems doesn't just understand problems; they generate multiple solutions, adapt when one fails, and always have a contingency.

The Sangbo Case (桑泊案) is where this idiom crystallizes around Xu Qi'an. A mysterious explosion at Sangbo Lake leads to a complex investigation involving court politics, ancient artifacts, and forces far above his rank. Xu Qi'an is outmatched in cultivation power by virtually everyone involved. He can't fight his way through this. He has to think his way through it.

What makes him 足智多谋 rather than simply clever is the layering. He doesn't deploy one strategy — he runs multiple plans simultaneously, feeds different information to different people to see who reacts and how, and uses his low status as camouflage. People underestimate a Bronze Gong. They speak freely around him. They assume his questions are simple because his rank is low. By the time they realize the Bronze Gong has been building a case against them, the case is already built.

His approach is best captured by his own philosophy: 大胆猜想，小心求证 — "Bold hypothesis, careful verification." Hypothesize wildly. Then prove it methodically. This is the scientific method dressed in the robes of a fantasy detective, and it works devastatingly well against opponents who think in terms of power hierarchies rather than evidence chains.

Use it: When someone navigates a complex situation with multiple backup plans — a startup founder who pitches three different strategies to investors depending on which questions they ask.

---

大智若愚 (dà zhì ruò yú) — "Great wisdom appears foolish"

大智若愚 comes from the Laozi (道德经) and describes the paradox that the wisest people often seem like idiots to casual observers. They don't perform intelligence. They don't announce their insights. They let others underestimate them because underestimation is its own kind of power.

Xu Qi'an lives this idiom daily. His personality is loud, irreverent, and apparently shallow. He makes jokes at inappropriate moments. He flirts badly. He complains about his salary. He has the demeanor of a man whose greatest intellectual achievement is remembering which tavern serves the cheapest wine. His colleagues see a lucky fool who somehow keeps stumbling into solved cases.

This is exactly the impression he wants. In a world where power is measured by cultivation rank, a Silver Gong drawing attention to his intelligence would be a Silver Gong inviting assassination. The powerful don't fear the loud — they fear the quiet. So Xu Qi'an is loud. He makes himself into a joke, a court entertainer, the guy who recites poetry for laughs. Meanwhile, behind the clown mask, he's tracking power flows, mapping alliances, and filing away every overheard conversation for future use.

The idiom's deepest application is in how he handles Wei Yuan's enemies. Wei Yuan (魏渊), the leader of the Nightwatchmen and Xu Qi'an's mentor, operates in a web of court intrigue where every visible ally becomes a target. Xu Qi'an protects himself — and by extension, Wei Yuan — by appearing to be nothing more than an entertaining subordinate. A dog that does tricks. Not a threat. Never a threat. Until the moment he bites.

Use it: When someone's competence is invisible until the moment it matters — a quiet team member who says nothing in meetings but produces the insight that saves the project.

---

嬉笑怒骂 (xī xiào nù mà) — "Joking and cursing freely"

嬉笑怒骂 originally described a literary style — writing that shifts fluidly between humor, anger, satire, and invective, all while maintaining artistic control. The writer who masters 嬉笑怒骂 can make you laugh in one paragraph and rage in the next, and both reactions serve the same argument.

This is Xu Qi'an's personality as a weapon. He doesn't just joke around — he deploys humor strategically. When confronting corrupt officials, he doesn't make accusations (accusations can be denied, evidence can be buried). He mocks them. He recites poems that obliquely reference their crimes. He makes the gathered crowd laugh at the official before the official realizes the laughter is evidence of public opinion turning against them.

The "退后，我要开始念诗了" moment is peak 嬉笑怒骂. He announces his intent to recite poetry the way a martial artist announces a deadly technique. The audience expects something solemn. He delivers something devastating — a poem that ridicules, exposes, or humiliates, wrapped in classical beauty that makes the insult land harder because it's artistically unimpeachable. You can't argue with the quality of the poetry. You can only stand there while it dismantles your reputation.

What makes this idiom specifically apt is the "怒骂" (anger and cursing) component. Xu Qi'an isn't just a comedian. His humor has teeth. When he encounters genuine injustice — a murdered witness, a covered-up crime, a powerful family destroying common people — the jokes stop, the voice drops, and the anger is real. The transition from 嬉笑 to 怒骂 is what makes him dangerous. You never know which version you're getting until it's too late.

Use it: When someone uses wit and directness interchangeably — a satirist whose comedy hits harder because you can feel the genuine outrage underneath.

---

知恩图报 (zhī ēn tú bào) — "Know kindness and plan to repay it"

知恩图报 describes a simple moral principle: if someone helps you, remember it, and find a way to repay it. Not eventually. Not vaguely. Plan it. The 图 (tú) means "to plan" or "to scheme" — this isn't passive gratitude. It's active repayment strategy.

Xu Qi'an's relationship with Wei Yuan is the axis on which this idiom turns. Wei Yuan sees potential in a loud-mouthed Bronze Gong that no one else sees. He mentors him, protects him from political enemies, gives him cases that should go to higher-ranked officers, and shields him from consequences when his methods attract the wrong kind of attention. Wei Yuan doesn't do this out of pure kindness — he's building an asset. But the kindness is real underneath the calculation, and Xu Qi'an recognizes both layers.

What makes Xu Qi'an's loyalty remarkable is that it's not blind. He knows Wei Yuan uses him. He knows some of the cases he's given are designed to advance Wei Yuan's political agenda as much as serve justice. He serves anyway — not because he's naive, but because he's done the moral math. Wei Yuan's agenda aligns with protecting common people. Wei Yuan's enemies are genuinely corrupt. The person using him is using him for good, and Xu Qi'an decides that being useful to a good cause is a form of freedom, not servitude.

This is 知恩图报 as a sophisticated moral position. Not "he was kind to me so I follow him blindly," but "he was kind to me, I understand his goals, I share his goals, and my repayment takes the form of making his goals succeed."

Use it: When someone's loyalty is both heartfelt and clear-eyed — an employee who stays at a company through hard times because the CEO believed in them early, and who repays that belief with performance, not just presence.

---

路见不平拔刀相助 (lù jiàn bùpíng bá dāo xiāng zhù) — "Draw your sword to help when you see injustice on the road"

This is the chivalric code distilled into a single phrase. You're walking. You see something wrong. You draw your weapon and intervene. No deliberation. No cost-benefit analysis. No checking whether the victim is someone important enough to justify the risk. You see injustice. You act.

Xu Qi'an's moral core is this idiom made flesh. He was a police officer in his previous life — not a philosopher, not a saint, just a cop who believed the job was supposed to mean something. When he transmigrates into a world where the powerful abuse the weak with even less accountability than in the modern world, he carries that belief with him like a loaded weapon.

The drama shows this repeatedly in small moments that don't advance the main plot but define the character. A merchant cheating a street vendor. A noble's servant beating a commoner. A low-ranking official demanding bribes from people who can't afford them. In each case, Xu Qi'an intervenes — not because it's strategic, not because it advances his investigation, but because he can't walk past injustice and still be the person he's decided to be.

This creates problems. Constantly. He makes enemies he doesn't need. He draws attention at moments when invisibility would serve him better. His superiors repeatedly warn him that a Nightwatchman's job is to investigate, not to crusade. He nods, agrees, and then draws his sword the next time he sees someone being mistreated on the street.

路见不平拔刀相助 is his most expensive trait and his most essential one. Without it, he'd be just another clever operator in a corrupt system. With it, he's the reason common people in the capital start to trust the Nightwatchmen for the first time in a generation.

Use it: When someone intervenes in a situation that isn't their business because it's the right thing to do — a bystander who steps between a bully and a stranger.

---

随机应变 (suí jī yìng biàn) — "Follow the opportunity and adapt to the change"

随机应变 describes the ability to adjust strategy in real time as circumstances shift. Not rigidity. Not planning so far ahead that you can't pivot. The ability to read the moment and respond to what's actually happening rather than what you expected to happen.

Every investigation Xu Qi'an runs goes sideways. Every single one. The Tax Silver Case reveals corruption deeper than theft. The Sangbo Case uncovers forces that operate above the emperor. Allies turn out to be compromised. Evidence gets destroyed. Witnesses die. The neat theory he constructed over three days collapses in ten minutes when a new fact emerges.

And he adapts. Instantly. Without the emotional paralysis that hits most people when their plan falls apart. This is the cop training showing through the fantasy setting. Real criminal investigation isn't about constructing a perfect theory and executing it — it's about constructing a theory, watching it get destroyed by reality, constructing a new one from the wreckage, and repeating until the truth survives every contradiction. Xu Qi'an does this faster than anyone around him because he's trained in a methodology they've never encountered.

随机应变 is also his combat philosophy. Outmatched in raw cultivation power by nearly every serious opponent, he fights with improvisation. He uses environmental factors. He exploits opponent psychology. He bluffs, retreats, sets traps, and turns his enemy's expectations against them. He fights the way a street cop fights — dirty, adaptive, and focused entirely on survival rather than honor.

Use it: When someone thrives in chaos — a crisis manager who throws out the playbook the moment reality diverges from the plan and builds a new one in real time.

---

不入虎穴焉得虎子 (bù rù hǔ xué yān dé hǔ zǐ) — "Can't catch tiger cubs without entering the tiger's den"

The idiom originates from the Han Dynasty general Ban Chao (班超), who led a small force deep into enemy territory against overwhelming odds. His reasoning: safety produces nothing. Only by accepting the risk of the den do you gain the prize inside it.

Xu Qi'an enters tiger dens the way other people enter restaurants — frequently, with appetite, and with insufficient concern for what might eat him inside. The Sangbo Case requires him to investigate people who could destroy him with a thought. The court politics he navigates involve factions that have murdered more capable operators than a Silver Gong from Changle County. Every time he pushes deeper into a conspiracy, he's walking further into the den with less chance of walking out.

He does it anyway. Partly because his moral code (路见不平拔刀相助) won't let him stop. Partly because his investigative instinct (明察秋毫) keeps showing him threads he can't resist pulling. But mostly because he understands something his more cautious colleagues don't: in the world of the Da Feng Dynasty, safety is an illusion. The powerful will eventually come for you whether you investigate them or not. The only difference is whether you enter the den prepared or get dragged in unprepared.

This is also where his secret background matters, though he doesn't know it yet. His father, 许平峰, injected half of the Da Feng Dynasty's national fortune (国运) into him at birth. This manifests as extraordinary luck — situations that should kill him break just right, coincidences that shouldn't happen conspire in his favor, the tiger that should eat him chokes on a bone at the critical moment. As the holder of Earth Book Fragment No. 3 (地书三号碎片), he's also connected to a network of powerful figures who occasionally intervene on his behalf without his knowledge.

不入虎穴焉得虎子 is the idiom of a man who walks into danger because he doesn't know how much invisible armor he's wearing. His courage is real. His survival is partly luck. The combination makes him the most dangerous kind of investigator: one who takes risks that rational people wouldn't, and lives through them often enough to take even bigger risks next time.

Use it: When calculated risk-taking is the only path to a meaningful result — a journalist who goes undercover in a dangerous organization because the story can't be told from outside.

---

Why It Works

Xu Qi'an works as a character because he's not a chosen one who discovers hidden power and becomes invincible. He's a working cop who discovers hidden corruption and becomes inconvenient. His modern knowledge gives him tools, not dominance. His scientific thinking gives him an edge, not omniscience. He still gets beaten up, outsmarted, outranked, and nearly killed on a regular basis.

The eight idioms above trace a character who detects what others miss (明察秋毫), plans with depth (足智多谋), hides his intelligence behind humor (大智若愚), uses that humor as a weapon (嬉笑怒骂), remains loyal to those who earned it (知恩图报), fights for strangers because it's right (路见不平拔刀相助), adapts when everything goes wrong (随机应变), and walks into danger because the truth lives in dangerous places (不入虎穴焉得虎子).

He's a detective in a world that hasn't invented detection yet. A comedian in a world that takes itself too seriously. A modern man in an ancient world who discovers that the ancient world's problems — corruption, abuse of power, the strong consuming the weak — are exactly the problems he became a cop to fight.

Stand back. He's about to start reciting poetry.

---

More in This Series

• The Real History Behind Guardians of the Dafeng
• 10 Chinese Idioms & Classical Quotes Every Fan Should Know
• The Cultivation Systems Explained: Confucians, Daoists & Buddhists
• Learn Chinese Watching Guardians of the Dafeng: 30 Essential Words

Explore more idioms about strategy and cleverness: Chinese Idioms About Strategy | Chinese Idioms About Courage | Chinese Idioms About Hard Work