"Wanwan, Qianyu and I have been discussing some very practical matters recently."
As was her way, Professor Qian got straight to the point, though her tone was gentle. "The apocalyptic world is steadily improving. Thanks to the advanced applications of Crystal Core Energy, we've made tremendous breakthroughs in many fields. But we have to consider a question: If the apocalypse ends and all the zombies are gone... where will we get more Crystal Cores?"
Chi Wan lowered her eyes. She had discussed this problem with Li Xingye a long time ago.
But there was no solution.
A world's population is finite, which means the number of zombies is also finite.
Especially now, thanks to the efforts of Li Xingye and the people at the base, the threat zombies posed to the survivors was diminishing daily.
Li Xingye had even joked about it back then. "Wanwan, I finally know why this space only opens one way from our side. It's completely designed to protect your world."
