Explosions of this magnitude had occurred a few times before, but they were usually brief, with just a few sounds before stopping. This time was entirely different. The explosions were continuous, as if they were the aftermath of an intense battle.
"Towards the direction of Demon City," Gu, with his ears against the ground, listened intently and then picked up binoculars to observe the northeast. He spoke after a moment, "It can be reasonably concluded that the battle is happening in the direction of Demon City, and the weapons used are likely similar to 130mm high-explosive shells."
Hearing Gu's report, Alex was slightly stunned, impressed by Gu's extraordinary abilities. Being able to deduce the type of shells used by the enemy from such a distance was quite remarkable, showcasing Gu's military knowledge.