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No matter the background of the person attacking the zombies, he couldn't be here specifically to eliminate threats for the people. The only valuable thing in this construction site was that apartment building, which was also where Ling Mo hid part of his supplies. The other party's target would likely be there as well.
Encountering survivors in the post-apocalyptic world might not be a good thing. Ling Mo approached the apartment building with caution, and after seeing no anomalies downstairs, he quietly slipped inside.
No sooner had he reached the second floor than Ling Mo heard several men's laughter. Fortunately, by the sound of it, they had only entered the second floor, probably to take shelter from the rain. This meant that the supplies hidden on the third floor were likely undiscovered.