City 18 was adjacent to City 10.
Two numerically nonconsecutive cities, yet geographically, they were only a little over two hundred kilometers apart. This was because the cities were not ordered by importance but by the sequence in which they were established.
If the Federation were likened to a circle, then City 18 and City 10 together would form the circle's center.
Of course, this metaphor wasn't accurate, as the Federation was not a regular circle.
Qing Chen had once asked Uncle Li Dong for a map of the Federation. It could be said that the map of the Outer World and the Inner World were not much different, except in the coastal areas.
If these two worlds really were parallel worlds.
Then the crust of the Inner World must have undergone violent movements to have transformed into its current state.
City 18 corresponded to Los Angeles City, and City 10 to Zheng City. Regardless of whether it was in the Inner World or the Outer World, they were always in the Central Plains.