Layer 422, a place surrounded by sandstorms, the Skull Mountains... When Lu Ping'an saw this address, he thought it was a joke.
If it weren't for Trina leading the way, who knows how long it would take to find this "relatively safe" gathering place.
But considering that it's impossible to make accurate geographical coordinates in this world, with too many terrain changes and mountain wind erosion, this simple and direct description might just be the most valuable and unchangeable map.
"Using landmarks as reference points, huh... Quite an ancient method."
What Lu Ping'an held in his hand was an instrument similar to a diving watch.
The "layers" in this world are not a concept in a physical sense, but a description of "energy levels."
You walk and walk, and suddenly feel suffocated; you might have reached the next layer. Even Lu Ping'an needs to gradually adapt to this continuously rising "altitude."