C439 In a Critical Moment!

Tang Miaomiao covered her ears and scolded, "What the hell?"

Chen Meixin said, "Could this ear-piercing sound have irritated the zombies outside?"

While they were talking, the zombies' roars suddenly became unusually hurried. As their roars became more and more hurried, the soldiers on top of the steel wall also became nervous. The frequency of their shooting suddenly increased