After learning the truth about Trisolaran civilization, Ye Wenjie becomes largely silent and asks for only one thing: to visit the ruins of Red Coast Base. Although no one believes she can manage the climb to Radar Peak alone, Ye insists on making it without assistance, stopping only briefly to rest and pushing her failing strength without mercy.

When Ye and the visitors reach the summit, they emerge above the clouds into bright sunlight. Instead of visible ruins, they find that Red Coast has been dismantled so completely that the mountaintop looks like empty wilderness, as if the base had never existed. This near-erasure emphasizes how thoroughly the site has been buried by history.

Ye is the one who recognizes what remains. Beneath vines she uncovers a rusted metal structure, the old base for the antenna that sent Earth's first message to an extraterrestrial world by using the sun as an amplifier. Nearby, the group finds a tiny memorial tablet marking Red Coast's dates, but its smallness makes it feel less like remembrance than an effort to forget.

Ye then walks to the edge of the cliff where she once killed two soldiers to protect the secret of Red Coast. Rather than looking at the cloud sea, she stares toward Qijiatun below, while her body weakens under the strain of the climb. Determined to remain standing long enough to see one more sunset at Red Coast, she watches the sun melt into the clouds in a bloody red glow and quietly claims it as both her own sunset and humanity's.