Location from remembrance-of-earths-past by
The political capital of Trisolaran Civilization Number 200 — the city where the Princeps holds court, the sophon program is authorized, and the decision to colonize Earth is made.
Zhaoge breathes only in the Stable Eras. In Chaotic Eras the population dehydrates into stacked sheets and the city closes itself like a flower. Decisions of state are made in real time before the entire ruling council, because Trisolarans cannot lie or deliberate in private. The decision to invade Earth was made here in a single afternoon.
A flat sprawling city of low domed structures designed to be dehydrated and rolled up at the start of any Chaotic Era, then unfurled again when the suns settle. By Earth standards the architecture is almost featureless — pragmatic, modular, easy to fold. The Princeps' chamber sits at its center, beneath a parabola of bioluminescent panels.