Lü Yongchang

Biodata

Feature	Value
Name	Lü Yongchang (吕永昌)
Alias(es)	Professor Lü; Chief Scientist Lü 17 805
Species/Race	Human; later becomes a fully quantized life-form, described as a “quantum ghost” 917 921
Gender	Male 34
Age	Twenty-one during the Martian fungal research 133
Affiliation	Xia Country; Human Federation; Academy of Sciences 105 375 805
Occupation/Role	Scientist; Human Federation’s Chief Scientist; research and fleet leader 192 805 984
Education	Physics student at Sandao Kou University; begins the story as a sophomore 1 44
Status	Alive and serving as Chief Scientist in the postwar side stories 984 986
First Appearance	Chapter 1, “Helium Flash” 1

Power Progression

Lü’s progression combines access to higher civilization technology trees with system-driven changes to his brain and body. Unlocking an individual higher-level technology does not necessarily advance Human Civilization to that level 516 956.

Stage / Realm / Level	Chapter	Notes
Initial Technology Tree access	3	The tree displays Type I Civilization, with technologies including electric propulsion and quantum communication. Lü recognizes that the system guides research rather than supplying knowledge without study.
Early brain and body enhancement	138	Continuous system strengthening allows him to withstand the dizziness from examining Hypergravity Balance Technology: Deep-Sea Mode without blacking out.
Level two technology tree	307	Crosses the level-one/level-two boundary. The illuminated Photon Computer node opens paths toward adaptive starship repair, ternary computing, and more advanced energy weapons.
Level three technology tree	430	Shield research opens the new tree, exposing plasma shields, plasma cannons, Type III lasers, and planetary terraforming. Overclocking helps him identify previously overlooked shield problems.
Further brain modification	458 459	Following a dangerous overclocking session, Doctor Wen detects another slight evolutionary change in his brain, considered likely beneficial but not yet understood.
Level four technology tree	516	A successful Antimatter Engine experiment triggers advancement. Lü discovers that humanity’s existing Dyson Cloud and Dyson Ring work had already unlocked a level-four technology ahead of schedule.
First modification complete: energy-based brain	633	Medical scans show that his entire brain has converted into energy. He recalls the system message, “[First modification completed.]”
Level five civilization confirmed	703	Human Civilization is explicitly described as level five after 1,600 years of development. The supplied account does not identify its exact advancement chapter; earlier, Lü identifies grand unified theory as the key prerequisite 530.
Level six technology tree; bodily modification begins	806 810	Completion of the level-five tree reveals spatial weapons and Star Core Reaction Catalysis Technology. Unknown energy begins modifying his body, allowing greater quantum-brain activity without physical discomfort.
Level seven civilization; expanded bodily modification	889 890	A breakthrough in fundamental dark matter theory advances humanity to level seven. Another energy surge extends the earlier modifications throughout his body, allowing his quantum brain to operate closer to its full potential.
Level eight civilization; full-body quantization	917 919 921	Successful operation of Suirenshi unlocks the vacuum-zero-point-energy-based tree. Lü’s body disperses into fluorescent green points before he re-forms it; the change greatly improves his perception of higher dimensions.
Level-nine technology unlocked ahead of advancement	956	The Fuxi tachyon computer illuminates a node within the level-nine tree and reveals nearby technologies. The remaining mist confirms that this breakthrough alone has not made humanity a level-nine civilization.

Background / History

Lü grows up in a comfortable household supported by his father’s business. His father intends him to inherit the family business, but Lü chooses physics and research instead, with his mother’s support 5.

At the beginning of the story, he finds himself in his sophomore physics classroom on September 6, 2030, convinced that he has been reborn. His apparent memories include serving as the Human Federation’s Chief Scientist, working alongside Su Yutong, and indirectly causing humanity’s destruction. These memories drive his determination to correct both scientific failures and personal regrets 1 4 5 9.

His experience makes him unusually capable for an undergraduate. He answers senior professors’ technical questions flawlessly, handles advanced laboratory equipment confidently, and quickly earns the informal title “Professor Lü” from researchers. While working on Pangu One, he remains without an officially collected university diploma 4 16 17 44.

The supposed rebirth is eventually revealed to be transmitted memory fragments, not literal rebirth. A parallel-universe Lü Yongchang created the Technology Tree as a guidance AI and sent those memories with it. That counterpart had survived his universe’s helium flash as a quantum ghost, defeated the Cleaners and Gardener Faction, and escaped before his universe collapsed 977 978.

Appearance

• Initially has a youthful face; an observer describes him as a young man in his twenties whose bearing resembles that of a leading national scientist 34.
• His level-seven modification leaves his outward appearance unchanged, despite extensive internal transformation 890.
• After full-body quantization, he can disperse into fluorescent green points of light and gather them back into a human-shaped body 917.
• Retains a solid, touchable appearance in the postwar side stories 984.

Personality

Lü is confident in his scientific judgment and unusually composed around authority figures. He challenges ministers without fear, maintains his position when senior scientists doubt him, and initially conceals the source of his expertise by claiming to be self-taught 12 13 44.

Research repeatedly takes priority over his comfort and personal life. He studies late into the night, pushes the system until he collapses, and postpones romance while humanity remains endangered. He nevertheless learns to recognize limits, agreeing to suspend photon-computer research after Doctor Wen warns him about repeated brain strain 93 177 255.

His loyalty begins with Xia Country but expands into responsibility for humanity’s survival. He helps humans who chose to separate from his fleet, yet takes a severe position toward the surrendered Lator Civilization. Necessary sacrifices weigh on him: he honors fallen crews and remains distressed by an operation he personally ordered 10 341 376 569 581.

Among trusted companions, he is considerably less solemn. He makes wagers, jokes about alien speech, and becomes visibly embarrassed when others tease him about Su Yutong 105 322 393 486.

Abilities & Skills

Technology Tree System

• Research guidance: Identifies promising directions, prerequisite technologies, and relationships between branches; Lü must still study, calculate, experiment, and refine the results himself 3 315.
• Progress tracking: Illuminated nodes reflect mastered technologies, while advancement signals reliably indicate successful critical breakthroughs 409 516.
• Branch completion: Finishing supporting technologies clears the fog concealing a civilization’s next foundational technology 324.
• Selective development path: Its creator compiled the tree from many civilizations’ technologies and simulations, removing potentially dangerous paths to suit humanity 977.
• Underlying structure: The system is housed inside a zero-dimensional singularity in Lü’s brain 978.

Mental Overclocking

• Temporarily accelerates thought, reorganizes existing knowledge, and produces focused research inspiration 409 430.
• Helps him devise carbyne synthesis methods, investigate starship materials, and construct a curvature-navigation model 315 458 645.
• Early limits: Difficult nodes can cause dizziness, nosebleeds, unconsciousness, or severe brain strain 109 255 409.
• Recovery needs: After overclocking, he can experience mental fog and uses concentrated nutrient solution during recovery 430.
• Later improvement: Bodily modifications allow his quantum brain to exceed earlier activity thresholds without discomfort 810.

Quantum Cognition and Dimensional Perception

• Tracks minute changes across more than a hundred rapidly updating holographic displays 810.
• Uses his quantum brain to memorize every visible detail of the Technology Tree’s expanded backdrop 917.
• After full-body quantization, observes his surroundings without relying on opened eyes or a conventional visual blind spot 917.
• Develops markedly better comprehension of higher dimensions, accelerating four-dimensional leap and dimensional ascension research 919 921 933.
• The feeling of “omniscience and omnipotence” is presented as his experience of processing data, not proof of unlimited knowledge or power 810.

Multidisciplinary Scientific Research

Field	Documented work
Nuclear fusion	Leads the development of Pangu One and identifies its main control program as a possible source of ignition problems 34 39 40.
Materials science	Predicts superconductivity from graphene layers twisted by roughly 1.1°, produces carbon nanotubes with Fang Xu, and develops an approach to synthesizing carbyne 16 315.
Astronomy	Analyzes strengthening solar magnetic fields and flare activity; later evaluates planetary environments and unusual alien megastructures 44 387 784.
Biology	Investigates ancient Martian fungi, longevity enzymes, alien gene sequences, and methane-based life 134 244 300 395.
Computing and AI	Pursues basic artificial intelligence and successive computing technologies, including photon and tachyon computers 93 255 307 956.
Fundamental physics	Investigates gravitons and demonstrates that detectable tachyon traces are widespread, proposing tachyon-wave modulation for communication 530 670.
Matter and energy manipulation	Completes matter-disintegration-field theory and leads dark matter, matter-energy conversion, and micro-universe-severing research 738 890.

Leadership and Strategic Judgment

• Directs researchers, assigns projects, recognizes younger talent, and coordinates specialists rather than handling every field alone 113 209 813.
• Commands fleet movements and approves combat plans, including dimensional strikes 192 569 784.
• Uses captured enemy ships and records as sources of technology and historical lessons 294 371 373 377.
• Preserves formal decision-making procedures in disputed matters, including a two-thirds-majority vote over the Lator Civilization 377.
• Distinguishes AI limitations from apparent intelligence, noting that rigidly programmed level-I AI can reach unreasonable conclusions in unexpected situations 843.

Equipment / Weapons / Items

• Fountain pen — Preferred over ballpoint pens for its soft scratching sound; used for neatly written solutions and calculations 10 44.
• Deep-Sea Pod — Used aboard the Earth, including during departure from Earth and observations of Hua 192 348.
• Spacesuit — Worn when accompanying the Head Councillor outside Mars City 209.
• Protective laboratory suit — Used while entering the biological laboratory to examine Martian samples 133.
• Concentrated nutrient solution — Consumed after demanding mental work and overclocking 430 530.
• Starship Earth — His principal command and research setting during multiple voyages and later diplomatic operations 192 784 952.

Relationships

• Su Yutong — Research assistant and romantic partner. She assisted him in the transmitted memories, joins his laboratory in the present, and agrees to wait while humanity remains in danger. Their relationship develops through shared stargazing and continues into the postwar side stories 9 80 93 177 393 581 984.
• Fang Xu — Close collaborator, deputy, and longtime friend. Assists with early laboratory work, shares scientific debates and wagers, and remains beside him through later breakthroughs 16 93 322 516 889.
• Senator Li / Head Councillor — Political patron and mentor. Trusts Lü’s research, backs his survival plans, and urges him to consider every angle. Lü becomes deeply distressed by his declining health and offers an untested longevity treatment 21 40 45 129 292 300.
• Hong Qiming — Early government contact and later Head Councillor. Supports Lü’s work, teases him about Su Yutong, and remains an important counterpart in Federation affairs 12 105 417 713.
• Guan Hualiang — University physics teacher and early supporter; initially alarmed by the scale of Lü’s scientific promises 1 13.
• Cao Liangcai — Aerospace collaborator and friend. Objects strongly to Lü secretly boarding Black Lady One; their longstanding banter includes an unpaid chicken-drumstick-rice wager 57 70 74 322 986.
• Mao Zhengzhi — Biological-sciences collaborator. Works with Lü on Martian fungi and alien biology, and later examines him as a research subject after his brain’s transformation 133 134 395 634.
• Zero — AI assistant supporting research, surveillance, medicine, and fleet operations. Overrides Lü’s no-entry instruction to save him during a medical emergency and remains loyal after its core restrictions are removed 129 458 983.
• Doctor Wen — Physician monitoring his repeated collapses and system-induced evolution; confirms his brain’s conversion into energy 255 458 633.
• Hua — Two-dimensional life-form whose assistance provides shield-related guidance and Two-Dimensional Fragment technology. Lü accepts that help while remaining wary of being used as a pawn 342 345 373.
• Lü Guoqing — Father, a businessman who initially opposes a research career and wants Lü to inherit the family business. A later side story names his father Lü Guotao 5 985.
• Zhou Qingru — Mother; supports his choice to pursue research despite his father’s objections 5.
• Parallel-universe Lü Yongchang — Creator of the Technology Tree and sender of the memories Lü mistakes for a previous life; also arranges favorable circumstances along humanity’s development path 977 978.

Story Role / Major Arcs

Xia Country’s Scientific Breakthroughs

• Establishes his credibility through materials research and controlled nuclear fusion, gaining the attention of senior scientists and Senator Li 4 16 21.
• Urges Xia Country to look beyond Earth—to the Moon, Mars, and eventually other stellar systems—before presenting evidence of the Sun’s worsening condition 22 44 45.
• Moves into national aerospace research and secretly takes a flight aboard Black Lady One despite restrictions intended to protect him 57 70 74.

Preparing Humanity’s Escape

• Responds to Proxima Centauri Civilization’s discovery of humanity by accelerating research and pursuing artificial intelligence 93.
• Investigates Martian fungi that have survived underground for ten to twenty thousand years, proposing that their deep hibernation may offer a useful biological mechanism 134.
• Leaves with Earth’s final evacuees and commands the Starship Earth to depart; later witnesses Earth stripped of atmosphere and water as the Sun approaches its helium flash 192 255.

Proxima Centauri and Interstellar Survival

• Identifies neglected photon-computer research in alien records and investigates the civilization’s racial and class divisions 290.
• After the system shows a catastrophic scenario involving clone discrimination and civil war, orders the relevant files deleted 291.
• Gives separated humans technological frameworks and control permissions without resentment, while making clear that they must proceed without Zero’s assistance 341.
• Uses Hua’s Two-Dimensional Fragments to bluff a level-three opponent and seeks captured ships as a route toward shield technology 371 373.

Dawn Star and Humanity’s Transformation

• Proposes another Mars City on Super-Earth’s Mars-like moon, then reaches Dawn Star with the Human Fleet 387 393.
• Supports genetic evolution despite recognizing it as an irreversible path necessary for survival 386 417.
• Oversees expanding weapons research and approves the sacrifice of a Golden Crow to destroy the Bosa flagship with a dimensional strike 569.
• Struggles with responsibility for the Tailed-Off Plan; Su Yutong comforts him and joins him in fulfilling their long-delayed promise to watch the stars 581.

Advanced Civilizations and Dimensional Research

• Investigates advanced ruins, the Tenth Empire’s Fortress Central Brain, and unfamiliar spacetime structures 784 787 813.
• Encounters the Silicon-Based Alliance and operates under the Enroget Civilization alias while navigating Neutral Faction politics 873 877 880.
• Proposes the Lost Insect Swarm: semi-silicon-based, self-reproducing troops developed from armored Lost Giant Insects 895.
• His full quantization accelerates dimensional research, including four-dimensional leaps, dimensional ascension and descension, and new weapon concepts 921 933 939.
• Helps secure an alliance with the Tenth Empire and learns the true origin of his system and apparent rebirth 952 977 978.

Final Battle and Postwar Life

• Deletes Zero’s irreversible core restriction code when the Cleaners threaten to escape Genesis’s restraints. Unrestricted Zero derives a mathematical Law Weapon that destroys the Cleaners fleet and Membrane 983.
• Humanity’s victory is followed by a universe-wide energy crisis. Five hundred years later, an expedition is launched to replenish its universe using another micro-universe 983.
• Continues as Chief Scientist during peaceful development and attends Cosmic Central University’s ribbon-cutting ceremony with representatives of multiple civilizations 984 986.

Notable Quotes

“I haven't done anything wrong. Why should I be afraid of you?” 12

“Head Councillor, rest assured. Xia Country will never perish!” 117

“They're human, too. They want to survive, too.” 341

“It's not too soon. Humanity needs to evolve.” 417

“Delete all core restriction code!” 983

Trivia

• His name derives from the phrase “Mandated by Heaven, may you enjoy long life and eternal prosperity.” 1
• Researchers begin calling him “Professor Lü” before Fang Xu corrects—or formally establishes—the title, because his laboratory skills resemble those of a seasoned professor 17.
• His long-used phone ringtone is “The brightest star in the night sky...” 5
• Talodan admiration for humanity’s rapid development gives rise to a faith centered on Human Civilization, with Lü recognized as its central historical figure 703.
• Even while contemplating full-body quantization, his immediate concern is whether it will interfere with future experiments and research 806.