Why the Ship Had to Be Taken: Intelligence Over Everything
In the early stages of the Trisolaran Crisis, humanity knew almost nothing about the alien civilization heading toward Earth. The only organization with real intelligence was the Earth-Trisolaris Organization (ETO), and every piece of communication between ETO and the Trisolaran world was stored on a single vessel — the Judgment Day.
This wasn't just any ship. The Judgment Day was the personal ocean liner of Evans, the leader of ETO's Adventist faction. On the surface, it was an environmentalist research vessel. In reality, it was the only platform on Earth capable of direct communication with the Trisolaran world. The data stored on board contained intelligence on Trisolaran technology, strategic intentions, and most critically, the full specifications of the sophon surveillance system.
The problem was simple and devastating: the data could not be destroyed. Sink the ship, and the intelligence goes to the bottom of the ocean forever. Storm the ship, and ETO members would wipe the drives instantly. What humanity needed wasn't to destroy the Judgment Day — it was to capture all its data in a scenario where the people on board had zero time to react.
This nearly impossible requirement gave birth to a nearly impossible plan.
Flying Blade: Wang Miao's Nano-Nightmare
Wang Miao was a nanomaterials researcher, and his "Flying Blade" material was a nanowire of extraordinary properties — so thin it was completely invisible to the naked eye, yet stronger than any known material.
The terrifying thing about Flying Blade was pure physics: a diameter of just tens of nanometers, but capable of withstanding enormous tension. Stretch this wire across the path of a moving object, and it functions as an infinitely sharp blade. Anything that contacts it gets sliced clean through — steel, concrete, human flesh — with no distinction and no resistance.
Wang Miao had been teetering on the edge of a nervous breakdown throughout his investigation of the Trisolaran game and the ETO. When he learned that his research would be weaponized for Operation Guzheng, his reaction was complicated. Flying Blade was a scientific achievement, years of painstaking research, and now it would be used to slice through a ship full of living people. The pride of a scientist and the horror of a human being hit him simultaneously.
But he had no choice. None of them did.
Shi Qiang's Plan: Crude, Direct, Effective
The operational mastermind behind Guzheng was Shi Qiang — the foul-mouthed, rough-edged police detective who looked more like a street thug than a counter-terrorism strategist.
Shi Qiang's plan was simple to the point of cruelty: string multiple Flying Blade nanowires horizontally across the narrowest section of the Panama Canal. When the Judgment Day passed through, these invisible wires would slice the entire ship — along with every person aboard — into dozens of thin sections, like a knife through cheese. The cutting would happen so fast that no one on board would have time to register anything unusual before the data storage devices were already exposed to open air.
That was Shi Qiang. No hand-wringing, no hesitation, no late-night soul-searching. His logic chain was: need the data → can't sink the ship → people can't have reaction time → so cut the ship and the people together. The reasoning was terrifyingly clean. Terrifyingly cold.
Massacre on the Canal: The Quietest Mass Killing
The execution of Operation Guzheng is one of the most disturbing scenes in the entire Three-Body Problem.
The Judgment Day sailed slowly into the Panama Canal. On support structures along both banks, the Flying Blade nanowires had been stretched into position at even intervals — like the strings of a massive guzheng, the Chinese zither that gave the operation its codename. The ship entered this invisible web of death with no awareness of what awaited it.
Then, in a matter of seconds, it was over.
The massive liner was sliced into neat, thin sections. Because the nanowire cuts were impossibly smooth, the ship didn't even fall apart immediately — the sections continued gliding forward on momentum for a short distance before slowly drifting apart in the current. Liu Cixin's description is restrained and precise: no explosions, no screams, no fire. Just a complete ship transformed in seconds into dozens of smooth-faced slices, like a deck of cards fanned across a table.
Over twelve hundred people on board. All dead. Death came so quickly that not a single person had time to feel pain.
The Weight of Twelve Hundred Lives
This is the part of Operation Guzheng that's hardest to digest: not everyone on the Judgment Day was a committed ETO member.
The ship carried ETO believers and Evans' devoted followers, yes. But it also carried uninformed crew members, hired sailors, and possibly ordinary people who had been swept up without understanding what the ship truly was. The planners of Operation Guzheng knew this. They made a cold calculation: these lives, weighed against the intelligence value that the Trisolaran communication data would provide to all of human civilization, were an acceptable sacrifice.
Nobody agonized over the ethics beforehand. At least, Liu Cixin doesn't write a single scene of moral deliberation among the decision-makers. This isn't an oversight — it's a deliberate narrative choice. At the scale of civilizational survival, the moral weight of twelve hundred lives was automatically zeroed out. The question "is there a way to reduce casualties" was never even raised during planning.
This makes Operation Guzheng an important moral specimen in the Three-Body series: when survival pressure is high enough, human society can make the most cold-blooded choices without a moment's hesitation, and afterward, no one is held accountable.
The Data Changed Everything
After the operation, the data extracted from the wreckage of the Judgment Day did, in fact, change everything.
For the first time, humanity saw the full picture of Trisolaran civilization — their technological capabilities, social structure, and most importantly, the surveillance range and operational limits of the sophons on Earth. This intelligence directly gave rise to the Wallfacer Project: since sophons could monitor all public behavior and electronic communication, humanity would have its brightest minds develop anti-Trisolaran strategies at the level of pure thought, creating information blind spots that sophons could not penetrate.
Without the intelligence from Operation Guzheng, there would be no Wallfacer Project. Without the Wallfacer Project, there would be no Luo Ji, and no Dark Forest deterrence. Operation Guzheng was the first foundation stone of humanity's entire defense against the Trisolarans — and that stone was forged from twelve hundred lives and one nanomaterials scientist's nightmare.
The Most "Thriller" Moment in the Entire Trilogy
The Three-Body trilogy is fundamentally hard science fiction, not a thriller. But the Operation Guzheng sequence reads like it was ripped from one — complete with setup, suspense, an irreversible countdown, a suffocating execution, and a moral shadow that lingers long after.
Liu Cixin demonstrates an underappreciated side of his craft here: he doesn't only write cosmic-scale grand narratives. He can also write ground-level, viscerally violent action set pieces. Operation Guzheng takes place in the second half of the first novel, at a point when readers have just emerged from the hallucinatory world of the Three-Body game and haven't yet been overwhelmed by the Dark Forest theory or dimensional strikes. The operation delivers the reader's first genuine shock through violence that is intensely physical and intensely specific.
What makes this scene unforgettable isn't its scale — quite the opposite. It's one of the smallest-scale iconic moments in the entire trilogy. No interstellar fleets, no dimensional weapons. Just a canal, a few invisible wires, and a ship sailing slowly toward death. It's precisely this everyday-scale violence that makes it more spine-chilling than any of the interstellar battles that come later.
Operation Guzheng tells you this: humanity doesn't need alien technology to create hell. A single wire is enough.