A week later,
Shen Jin set down the last block of [Compressed Cobblestone], finally finishing the walls of Home No. 1.
Now, the entire 130-square-kilometer area around the Train Station, equivalent to 195,000 mu of land, had been incorporated into Shen Jin's Home No. 1 Base.
The outer walls stood 30 meters high and were 3 meters thick. The outermost layer was [Compressed Cobblestone], while the two inner layers were ordinary [cobblestone].
Walls like these were already extremely strong. Even an L1 zombie attacking frantically would need several hours to break a hole through them.
These 130 square kilometers were now a safe zone.
"Finally done! That was so boring. If we expand again, won't I have to spend a whole month building walls?"
Shen Jin shook his head and stopped thinking about the future. These 130 square kilometers were actually enough for them to develop for a long time.
A larger area was not necessarily better, because it meant facing more zombie attacks every day, more frequently.
There would also be more positions to defend and more members needed to patrol the walls.
Without a correspondingly large force of Superhumans, they would not be able to defend such a vast territory at all.
Within these 130 square kilometers, the southern side bordering the sea needed no defense.
The northern side bordering the mountains had very few zombies and basically posed no problems either.
The main defensive pressure came from the large stretch of urban area immediately to the west and Haishan Pass District to the east.
Both were densely populated areas.
Even though the Zombie Horde had taken away most of the zombies in the city, the remaining zombie density was still greater than in the suburbs.
The defensive lines along the eastern and western walls were each about