Revolutionary students beat physics professor Ye Zhetai to death during a violent public struggle session at Tsinghua University.

Bai Mulin frames Ye Wenjie for writing a political protest letter, betraying the only person she has trusted since her father's death.

Ye Wenjie is transported by helicopter to the secret Red Coast Base and offered a classified job she cannot refuse.

Wang Miao attends the Battle Command Center and discovers that global military forces are secretly united against an unknown enemy.

Wang Miao discovers a mysterious countdown appearing in every photograph he takes, with no identifiable source or explanation.

Wang Miao shuts down his nanomaterial experiment on orders from Shen Yufei and the countdown immediately vanishes from his vision.

Lei Zhicheng reveals to Ye Wenjie that Red Coast Base's true purpose is to search for extraterrestrial life.

At a coffee shop players' meeting, Pan Han reveals that the Three Body game world is based on a real alien civilization.

Ye Wenjie is publicly named the commander of the Earth-Trisolaris Organization before a gathering of roughly three hundred members.

Ye Wenjie secretly programs Red Coast's antenna to fire a radio message into space using the sun as an amplifier.

Ye Wenjie receives a message from a Trisolaran pacifist warning her not to reply to any alien contact.

Ye Wenjie sends a response inviting the Trisolarans to come to Earth, promising to help them conquer it.

Operation Guzheng slices apart the ETO's communications ship with nanomaterial nets as it passes through the Panama Canal.

The Trisolarans use their sophon network to simultaneously send all of humanity the message 'You're bugs!'

Ye Wenjie climbs Radar Peak one final time and throws herself off the cliff where she once killed her husband.

The story begins during China's Cultural Revolution, when Ye Wenjie watches her father beaten to death for refusing to politicize his science, setting her on a path of deep disillusionment with humanity. After being betrayed and sent to a secret military base, she eventually learns its true purpose and makes the fateful decision to invite an alien civilization to conquer Earth. Decades later, nanotechnology researcher Wang Miao is pulled into a global military effort to understand why the world's top physicists are dying by suicide and why fundamental science appears to be breaking down. Wang's investigation leads him through a mysterious video game, a secret organization, and a public revelation that an alien fleet is already en route to Earth. The human response culminates in a daring military operation and the devastating discovery that the aliens have already neutralized humanity's ability to advance scientifically. The novel closes with Ye returning to the mountain where her story began, leaving behind a transformed and terrified civilization.

The headline events that drove humanity onto a collision course with the Trisolarans.

Ye Wenjie discovers that her academic advisor Professor Ruan has died by suicide after enduring prolonged revolutionary torture.

Ye Wenjie reads the banned book Silent Spring and becomes convinced that humanity cannot be trusted to protect the planet.

Ye Wenjie arrives at Radar Peak and watches the massive antenna fire, killing an entire flock of passing birds.

Yang Weining privately warns Ye Wenjie that anyone who joins the Red Coast project can never leave the base.

Wang Miao visits Ding Yi and learns that particle accelerators are producing results that violate the known laws of physics.

Wang Miao visits Shen Yufei and sees her playing the Three Body video game for the first time.

Wang Miao enters the Three Body game for the first time and experiences civilizations repeatedly destroyed by three unpredictable suns.

Ye Wenjie and Yang Weining fall in love and marry at the Red Coast Base during their years working together.

Wei Cheng explains how he independently developed three-body equations while meditating on emptiness at a Buddhist monastery.

Pan Han confesses to murdering Shen Yufei at the ETO meeting and is killed when someone breaks his neck.

Ye Wenjie confesses during interrogation to cutting the safety ropes of Yang Weining and Lei Zhicheng, killing them both.

Ye Wenjie gives birth to Yang Dong and spends six months recovering with a local hunter's family.

Wang Miao and Ding Yi listen as Ye's interrogation reveals that the Trisolarans sent sophons to permanently block human scientific progress.

The Trisolaran listener receives Ye Wenjie's broadcast, sends Earth a warning not to reply, and is condemned to death by the princeps.

Shi Qiang takes Wang Miao to a field of locusts and argues that bugs have outlasted every human attempt to destroy them.

This pool traces the quieter but consequential events that shaped the novel's world, beginning with the deaths and betrayals that radicalized Ye Wenjie during the Cultural Revolution. It follows her arrival at Red Coast Base, her unlikely marriage there, and the murders she committed to protect her secret, alongside the birth of her daughter Yang Dong. In the present, Wang Miao moves from learning about the collapse of physics to seeing the Three Body game for the first time and playing through its first civilization. The pool then charts the ETO's internal violence, Ye's confessions, and the scientific revelations about the sophons, before ending with Shi Qiang's quiet lesson about the endurance of bugs. Together, these events reveal how deep the conspiracy runs and how high the personal costs have been for nearly every character involved.

The significant moments behind the scenes that built the world of the main story.

Ye Wenjie's mother Shao Lin publicly accuses her own husband of teaching anti-dialectical physics during his struggle session.

Ye Wenjie copies Bai Mulin's protest letter, feeling genuine comfort with another person for the first time since her father's death.

Ye Wenjie refuses to sign a document implicating her father's former colleagues even as her interrogator douses her with ice water.

Ye Wenjie accepts the position at Red Coast Base without fear, indifferent to the fact that she can never leave.

Wang Miao agrees to go undercover in the Frontiers of Science after Shi Qiang mocks his hesitation as weakness.

Wang Miao wears a radiation monitoring headset and observes the cosmic background flickering, sensing an immense and alien presence.

Wang Miao solves the three-body problem inside the game as his avatar Copernicus and is invited to advance to the next level.

Wei Cheng hands all of his three-body research to Wang Miao and asks him to publish it under his own name.

Wang Miao plays Three Body's final level and watches the Trisolaran Interstellar Fleet silently launch toward an unknown destination.

Ye Wenjie tells the ETO gathering that the Trisolaran fleet is already traveling to Earth and will arrive in roughly 450 years.

Ye Wenjie cross-references radiation data from Jupiter and Earth's base records and discovers the sun can amplify radio signals across vast distances.

Ye Wenjie is politically rehabilitated and returns to Beijing to teach, trying to put the memory of her message behind her.

Ye Wenjie and Mike Evans shake hands as comrades after agreeing that humanity requires an outside force to judge and correct it.

The Trisolaran princeps decides that traveling to Earth is worth the gamble and orders the interstellar fleet to prepare for departure.

Trisolaran scientists successfully develop sophon supercomputers folded inside protons and fire two toward Earth to permanently disrupt human scientific research.

This pool focuses on the moments of choice and revelation that redirected the course of events, starting with the personal betrayals inside Ye Wenjie's family that set her disillusionment in motion. It traces her key decisions at Red Coast, from accepting a life she could never leave to uncovering the scientific breakthrough that made contact with an alien world possible. In the present, Wang Miao's own turning points unfold through his reluctant agreement to go undercover, his terrifying glimpse of an alien presence in the cosmos, and his progress through the Three Body game toward hard truths. The pool then surfaces Ye's later revelations to the ETO, the backstory of how she formed her alliance with Mike Evans, and the Trisolaran decisions that sealed Earth's fate. It ends with the Trisolarans completing and deploying the sophons, the technological move that quietly locked humanity out of its own future.

The pivotal decisions, discoveries, and emotional shifts that determined the fate of two civilizations.