Several tens of kilometers away,
a simple eavesdropping device, disguised as a trumped flower using branches and grass, had its connection wire deeply buried into a thirteen-meter-deep hole.
At such depth, it was enough to shield from the scanning of a First-order Infantry Radar; only if they encountered a Second-order Infantry Spirit Radar or a Foundation-building cultivator would it likely be detected from a distance.
Two students from No.7 High School in the Body Refining Realm listened carefully to the device for a while and then relaxed.
"There's no sound of tank engines."
One short student said with lingering fear, "I saw the way Zhou Liuchuan and the other one died; not a piece of intact flesh could be found, blown to smithereens by the anti-aircraft machine guns."
"Those bastards from No.1 High School! They don't adhere to the morals of the Xianmen Sect!"
Another student cursed.
