C275 A Union of Human and Corpse

According to Shen Xue's explanation.

The reason why there were more people than zombies in the Red City and Watermelon City was that there were fewer zombies.

It was entirely because the zombies were stupid and didn't know how to hide.

As for the survivors, they knew how to avoid being tracked by the mutant wild beasts.

In Red City, the hostility towards zombies was not very great