Why Is This Kind of World Recovering Spiritual Energy?

This was the second day after the war. Looking at the ruins, Ye Xu felt no sadness. After all, in that era, there were no emotions between people, and he could only consider his own survival. Suddenly his vision went dark, and he appeared in a mountain peak. This place was different from the ruins filled with various machines before. It was very primitive, with four buildings, surrounded by nothingness. Ye Xu tried and found that he couldn't enter the four buildings at all. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.