The stone-walled city encloses this small refugee village with more than thirty two-story shelters.
The concept of city walls was not valued at all beforehand, until that time when Elvin Fisher, leader of the so-called "Storm Group," attacked Lin Yue's shelter and was eliminated. This concept then truly started to spread.
City walls can block those survivors who live by looting, as well as repel hordes of mutant creatures, and all they require is some easily mined stones.
Except for the depths of deserts and wastelands, stones are still quite easy to obtain.
During that time, Lin Yue's shelter's restriction and control over the Storm Group, along with its many uses and functions, showed survivors its importance, allowing stone walls to be promoted throughout the world.
"Old Master, he hasn't replied yet," Fei Yue turned back to look at the elder behind him, feeling somewhat uneasy.
