In the Original World, there is a mountain range named Heavenly Ridge, which spans across hundreds of kingdoms such as Qin, Jin, Zhao, Xia etc., it is a continuous mountain range extending for billions of light years.
The highest point of this mountain even surpasses some planets, it truly extends beyond the heavens, thus the name Heavenly Ridge.
This mountain does not belong to any country, and no country can have absolute control over it.
This place is a haven for smugglers and criminals. Many people who cannot go to other countries will enter Heavenly Ridge.
Of course, one could also venture to the Endless Star Sea, but there are Imperial Clans there, as well as some races that rely on the Imperial Clans. These races are enemies of the surface races in the Original World, so going to the Endless Star Sea would be very dangerous.
Within the Heavenly Ridge, there is a very famous city called Freedom City.