ecological sphere
First appears in Book 3: Death's End, chapter 38 (Post-Deterrence Era, Day 1–Day 5 Gravity and Blue Space, Deep Space Beyond the Oort Cloud)
Appearances
B1
B2
B3
Key moments
- Book 3 · Ch 38The Ring's warning and the gift
The Ring says the dark forest exists between civilizations in the same dimension, urges humans to leave the puddle, and receives Guan's ecological sphere before falling silent.
- Book 3 · Ch 75Leaving the mini-universe
Sophon leaves a message-in-a-bottle box for the next universe, Cheng Xin leaves her ecological sphere, and the three board the spaceship and exit through the door toward the habitable planet.