Decades after the Doomsday Battle, the dark forest deterrence keeps the Trisolaran invaders away and Earth enjoys prosperity. Earth uses Trisolaran knowledge, and the Trisolarans are adopting Earth culture. Soon the two civilizations will be able to coexist peacefully. However, Cheng Xin, an aerospace engineer from the early twenty-first century, awakens from hibernation and has information that could upset the delicate balance between the two worlds.

"A Tom Doherty Associates book." Translated from the Chinese. Sequel to: The dark forest.