Cheongmun Ryeong

Cheongmun Ryeong is a formation master of the Cheongmun Clan and one of Seo Eun-hyun’s most formative teachers in A Regressor’s Tale of Cultivation. Initially an irritable Qi Building elder who has abandoned hope of Core Formation, he prizes precise understanding more than speed or prestige and builds Seo’s foundation in spells, mantras, and formations. In another history, forbidden astronomical knowledge mutates him into a salt-producing monster without replacing the person resisting inside. A Cheongmun Ryeong later encountered as Salt Sea Master teaches Seo the principles of Immortal Arts, although the exact mechanism connecting the sealed Observatory state to Salt Mountain is not revealed.

Biography

The master behind a closed door

Cheongmun Ryeong accepts Seo as a disciple because the slow cultivator asks to follow Understanding before Breakthrough. He initially teaches from behind a closed door, throws out annotated volumes on the Seventy-Two Earthly Sha True Words and Thirty-Six Heavenly Gang Law Decrees, and answers questions only after prolonged insults. The hostility is partly temperament and partly a standard: he wants a student who can ask why a formula works, not one who merely repeats words until spiritual power accumulates. (Chapters 43–44)

Seo’s extraordinary slowness tests that standard for decades. Cheongmun Ryeong repeatedly threatens expulsion but never carries it out, eventually opening the door and giving direct instruction as Seo reaches the third Qi Refining star. His teaching connects spell language, spiritual-energy frequencies, dragon veins, and formation deployment, allowing a supposedly talentless disciple to construct a coherent cultivation path. The contrast between his words and sustained labor becomes the clearest evidence of his care: irritation never excuses him from the responsibility he accepted. (Chapter 44)

That care becomes explicit at Seo’s death. Cheongmun Ryeong confronts the people judging his disciple, identifies himself as unmatched in the three kingdoms at dragon veins, formations, and basic spells, and lays Seo’s prostrated body to rest beneath a quince tree. He promises not to forget him. Because regression erases Cheongmun Ryeong’s memory of that life, later meetings cannot continue the relationship automatically; Seo must earn scholarly trust again while carrying the heart exchanged with a master who no longer remembers giving it. (Chapters 48–49, 96–97)

Scholar, collaborator, and transformed guardian

In a later cycle, Seo approaches Cheongmun Ryeong as a fellow formation scholar rather than declaring a forgotten discipleship. Proper questions immediately revive their compatibility. Cheongmun Ryeong helps refine the Longevity Fruit formation, recruits Buk Hyang-hwa as its artifact specialist, and joins the expedition into Serving Command Palace. He measures dragon veins and technical structures while Buk analyzes circuits, turning the expedition into a collaboration among complementary experts rather than a contest over who possesses the broadest title. (Chapters 96–116)

In the history recounted by Kim Young-hoon, abundant support lets Cheongmun Ryeong overcome his frail constitution, combine Understanding before Breakthrough with direct advancement, and reach Core Formation. He becomes Kim’s friend and rival inside the Pure Friends Alliance, then assists Song Jin in interpreting data from the Sea Dragon Astronomical Observatory. His command of basic spell language makes the observation possible, but no safe boundary protects the observer from the cosmic truth encoded in what he reads. (Chapter 272)

After eating the interpreted records, Cheongmun Ryeong rises to a violent Nascent Soul-ranked state whose attacks carry an apparent rule that evasion is forbidden. Strange stones form inside his body, and successive expeditions cut them out to power Nether Crossing Ships while his shape becomes increasingly monstrous. Yet the change is not a replacement by an unrelated creature. When Kim finally seals his soul, Cheongmun Ryeong regains lucidity and reveals that he has been suppressing the thing sprouting within him, contending alone so that the catastrophe does not consume the world. (Chapters 272–278)

Salt Sea Master and the teaching of Immortal Arts

The stone removed from Cheongmun Ryeong’s transformed body becomes a passage connected to the world of Salt Mountain. There, Seo encounters a Cheongmun Ryeong identified as Salt Sea Master, one of the world’s three greatest powers. His sharp questions, impatience, intellectual rigor, and protective concern preserve recognizable continuity, but the passage does not show whether the sealed Observatory soul transferred into this life or whether Salt Mountain’s altered history connected them by another means. Seo nevertheless accepts him as master and undergoes his Immortal Arts trial. (Chapters 438, 459–464)

Cheongmun Ryeong teaches that Immortal Arts are not privileges reserved for titled immortals. Every living body already unfolds the art called life, and a heart can affect the world because it is distributed throughout all phenomena rather than confined to flesh or spirit. He demonstrates Rain, Sunlight, Heat, Cold, Wind, and Time as primal expressions of the heart, then organizes Seo’s training through Various Omens, Examination of Doubts, Five Epochs, Three Spirits, and Eight Paths, One Extreme. The lesson joins cosmology to ethical restraint: possessing authority never makes another life purposeless. (Chapters 464–465)

Cheongmun Ryeong recognizes that Seo and the other Enders come from outside his world and knows that his disciple will eventually leave. He also sees the dangerous extremity developing in his foster child Gwak Am. Near the end of a lifespan already prolonged by Immortal Arts, he asks Gwak Am to grant Seo time rather than murder him immediately and sends Seo west to discover an original art instead of remaining a permanent imitator. His last teaching is therefore both technical and familial, arranging a future for two disciples who cannot live peacefully together. (Chapters 465–466)

A final lesson that outlives the teacher

Cheongmun Ryeong’s natural lifespan ends before Seo returns, but his will and soul remain in the shrine while Gwak Am bars the unready junior from entering. Seo completes a world-spanning journey and realizes that effort alone cannot prevent every loss. Only after he creates the beginning of an Immortal Art grounded in connection does Gwak Am allow him to approach the preserved body. Cheongmun Ryeong thus turns his own funeral into the final examination: inheritance requires an answer, not just grief or obedience. (Chapter 466)

After Seo bows ten times, Cheongmun Ryeong’s soul emerges in pure white radiance, looks at him warmly, and scatters like grains of salt. Gwak Am explains that their master waited beyond his final breath to witness the promised beginning. The peaceful departure closes the Salt Mountain life, but it does not establish that the earlier vegetative body was cured or explain how its sealed soul relates mechanically to this departing one. Continuity rests on the shared identity, heart, and connections rather than a demonstrated transfer procedure. (Chapter 466)

His formulas continue operating after his death. Seo uses the structure of the taught Immortal Arts in later battles and in the development of his own connection-centered authority, while Gwak Am carries the same lineage into a radically different doctrine of forced unity. The disciples’ opposed conclusions reveal the limit of a teacher’s control: Cheongmun Ryeong can give both men a language for changing heaven, but each heart decides what kind of world that language should create. (Chapters 497, 509, 545, 553)

Appearance and personality

Cheongmun Ryeong is first shown as an aging cultivator with a long goat beard, a grumpy frown, and a preference for speaking from behind his closed door. In the Salt Mountain world he is again an elderly master, seated steadily on a narrow branch without a visible spell and later preserved in a clean lotus posture after death. His final soul appears in pure white radiance whose falling particles resemble salt, linking the quiet scholar’s departure to the transformed and divine imagery surrounding his later history. (Chapters 44, 463–466)

He is prickly, proud, relentlessly inquisitive, and intolerant of shallow reasoning. His characteristic question is why someone thinks a method should work. Beneath the insults lies patience measured in decades, respect for serious labor, and a strong sense of responsibility toward disciples. He can laugh heartily with peers and show open warmth late in life, yet he never becomes mild: even his final kindness takes the form of an assignment Seo must solve for himself. (Chapters 44, 49, 96–116, 463–466)

Abilities and cultivation

Formations, mantras, and dragon veins

Cheongmun Ryeong’s original specialty is the technical language underlying lower-realm cultivation. He analyzes basic spells, True Words, Law Decrees, spiritual-energy frequencies, dragon veins, and formations, then translates those structures into annotated explanations a slower disciple can actually follow. His arrays can redirect gathered power, accelerate spiritual growth under defined conditions, and coordinate with artifacts designed by another specialist. This breadth earns him recognition as one of the three foremost Qi Building experts of the surrounding kingdoms despite his initially limited realm. (Chapters 43–49, 96–116)

His strength depends on exact information, an appropriate formation field, and sufficient resources. He cannot make Seo cultivate quickly, and the Longevity Fruit project requires Buk Hyang-hwa’s artifacts and access to Serving Command Palace rather than formation knowledge alone. Later, overwhelming resources let him turn understanding into Core Formation progress, but the Astronomical Observatory demonstrates the ultimate danger of his method: a language precise enough to interpret heaven can expose its reader to a truth the body and mind cannot safely contain. (Chapters 96–116, 272–278)

Astronomical transformation and salt

After ingesting the interpreted astronomical records, Cheongmun Ryeong’s body produces stone-like masses that function in part like a Nascent Soul and contain enough power to serve as Nether Crossing Ship cores. His attacks impose conceptual certainty—Kim experiences them as bound to hit—and his body continually changes while resisting repeated subjugation expeditions. The resulting salt-associated existence is immensely more dangerous than the earlier formation elder, but its power derives from catastrophic contact with external knowledge rather than a controlled cultivation route. (Chapters 272–278)

The transformation severely compromises his behavior and bodily autonomy. Allies initially believe the man they knew has vanished, yet his final lucidity proves that he remains inside and has been suppressing the invading growth. Kim’s unnamed martial breakthrough seals the soul rather than curing the condition, leaving the transformed body vegetative in the Observatory. The later Salt Mountain passage confirms a further Cheongmun Ryeong history without establishing how that history arises from the sealed body, so it cannot be treated as a demonstrated cure or direct soul transfer. (Chapters 272–278, 438, 459–466)

Foundational Immortal Arts

Cheongmun Ryeong’s Salt Mountain teaching begins from the proposition that every life already performs Immortal Art. A heart is spread across all phenomena, so a practitioner who clears the heart, exchanges it with others, and accepts death can reflect that heart into the world. Various Omens expresses the primal sequence of Rain, Sunlight, Heat, Cold, Wind, and Time. Examination of Doubts uses seven divinatory forms to rearrange phenomena through attraction force, including Clearing, Cloudiness, Want of Connection, Crossing, Inner Diagram, and Outer Diagram. (Chapters 463–465)

Five Epochs, Three Spirits reads five constellations and gathers three spirits to complete Eight Paths, while Eight Paths, One Extreme unites those paths through the Nine Palaces and approaches true Immortal Art. Cheongmun Ryeong calls further alignment of the Five Affairs, Five Elements, and Ten Heavenly Stems the final stage of this training. These formulas are a curriculum rather than automatic omnipotence: Seo spends decades learning them, still loses to Gwak Am’s superior divination, and must eventually create an art rooted in his own heart. (Chapters 465–466)

Cheongmun Ryeong can heal and strengthen Seo without ordinary qi movement, project an estate doorway into distant grasslands, call a disciple through will, and extend life beyond its natural end. Each result reflects world-altering heart rather than conventional stored spiritual power. Lifespan extension remains temporary, and his final vessel cannot sustain him indefinitely. His latest personal use is to wait for Seo’s answer; afterward the soul scatters, while later deployments of his formulas belong to the disciples who inherited them. (Chapters 463–466, 497, 509, 545, 553)

Power progression

Relationships

• Seo Eun-hyun: Disciple, later scholarly collaborator, and inheritor of his Immortal Arts. Regression repeatedly removes Cheongmun Ryeong’s memories, but Seo rebuilds the relationship through honest questions and ultimately answers his final assignment with an original art of connection.
• Gwak Am: First disciple, foster child, and inheritor. Cheongmun Ryeong loves the child he raised while recognizing the radical cruelty growing within him, and his last request secures Seo a chance to survive Gwak Am’s hostility.
• Kim Young-hoon: Friend and martial rival in the Pure Friends Alliance. Kim’s attempt to save him from the astronomical transformation produces an unnamed breakthrough and a soul-seal rather than a clean victory.
• Buk Hyang-hwa: Artifact-refining collaborator and respected successor among the lower realm’s three great specialists. Her later study of the stone from his body discovers the route into Salt Mountain.
• Song Jin: Technical partner whose request brings him to the Astronomical Observatory. Their investigation produces the forbidden interpretation that transforms Cheongmun Ryeong and endangers the world.

Items

• Serving Command Ark: The great structure whose dragon veins, formation needs, and technical systems bring Cheongmun Ryeong into collaboration with Seo and Buk Hyang-hwa.
• Nether Crossing Ship: A vessel he studies and later helps Song Jin use to enter the Astronomical Observatory; stones removed from his transformed body subsequently power ships of the same kind.
• Astronomical data stones: Stone-like masses formed from the records he ingested. They serve as enormous power sources, while one sealed into Buk Hyang-hwa’s norigae becomes a passage toward Salt Mountain.