Chen Ergou held a geomagnetic instrument, pacing around, his eyes fixed intently on it.
Perseverance pays off. Just as Chen Ergou reached a relatively open area, about a hundred meters from Tree City, the geomagnetic instrument in his hand began to change.
"We did it!"
At that moment, the geomagnetic instrument in Chen Ergou's hand started to swing wildly as if it had gone mad. With a loud shout, Ahei and the others quickly approached Chen Ergou, their hearts filled with excitement.
"Ergou, why is the geomagnetic instrument behaving like this?"
"Haha, Uncle Mo, you might not know this."
"It's because there's a vast underground city, which creates a massive magnetic field. Along with the interference of the earth's magnetic field, it swings wildly, proving that we've found it, the underground city is right here!"
After these words, Mo Bai and the others suddenly understood, while Chen Ergou wore a happy face. At this moment, the Zhang Sisters also came over, joyfully asking.
