The moment the piercing alarm sounded, several members of the search team shook their heads in unison.

On the row of screens in front of them, there was a red triangle symbol.

Ye Qing also stood up with him.

"What kind of mountain is that?"

Wang Chailong's eyes were like radar, and they were constantly strafing back and forth on the small screen next to him.

Five seconds later, he clenched his fists and shouted, "That's Humpback Mountain, about thirty kilometers away from the core scenic spot." ”

Ye Qing immediately gave the order to set off towards that mountain, and at the same time, Ye Qing also called up the detailed data of the drone that was searching for the camelback mountain at this time.

Drone number 33 has just detected a volt-meter electric field range signal of 1.71 at the foot of this mountain.

1.71 volt meters, what is the concept of this number?

With an electric field of this intensity, even if a worker builds ten signal base stations on the camelback mountain, he doesn't want to connect the device that sent the signal to the line.

Because even if a mobile phone is turned off, the electric field strength generated is greater than it.

Thirty kilometers, the Banshee Flying Machine took only five minutes.

Banshee flying machines descending from the sky broke through the rain curtain and hovered over the summit of this mountain.

Looking down through the porthole, this mountain peak looks like half a steamed bun, the whole mountain is overgrown with pine trees, and the banshee flying machine with a huge physique does not even have a place to stay.

The two pilots flew around the mountain, looking for a landing location and visually searching for the source.

Needless to say, the owner of that source must have been one of the nine college students.

It's just that the aircraft went around in a circle, and there wasn't even a single figure below.

The landing position was also not found.

In the end, the brave pilot simply found a cliff and aimed the aircraft at the edge of the cliff, while the front half of the aircraft was still floating outside the empty cliff.

The two thrusters provided strong support for the front half of the aircraft, and as soon as the rear hatch opened, Wang Chailong, who was the first to rush out, suddenly stopped suddenly.

He covered his mouth tightly with his right hand and pressed back the scream that was supposed to be coming out.

Scared to death!

At the foot are two hollow telescopic decks on the edge of the cliff, and it is windy and rainy outside......

At the same time, Wang Chailong honestly bent his waist to the lowest and flowed across this hollow deck like a stone crossing a river.

The rest of the team members came with equipment and learned from each other, and Ye Qing was the last.

However, Ye Qing's treatment was different from theirs, and less than half a minute after the huge banshee flying machine left, a Nighthawk flying machine fell.

With its small physique, it could stop on the edge of the cliff, and the pilot also jumped down to help Ye Qing open the door.

The Nighthawk flew behind several members of the search team, following them over the mountain for more than ten minutes, and finally stopped next to a boulder.

In front of them, a black drone was hovering in mid-air at a height of five meters from the boulder.

Several members of the search team kept rubbing their eyes, and when they got closer, they found that the drone had no propellers, and it was like a mountain eagle, constantly flapping its wings in the rain.

If it weren't for the fact that it didn't have a single feather on its body, it had a round electronic device hanging from its belly that seemed to be plated with gold.

Otherwise, a few members of the search team would have thought that they had found a new breed of eagle.

Ye Qing beckoned to the "Mountain Eagle", and the other party flapped his wings and quickly disappeared in front of several people.

Ye Qing, who was wearing a raincoat, took out a silver-gray bag from behind him, "You put all the electronic devices you have with you into this bag." ”

"For ...... What?"

"This is the electromagnetic shielding bag, and I want to block out the clutter of all the electronic devices on you. In this way, I can use the instrument to accurately locate the signal source. ”

The search team members hurriedly took out their pockets, and just now the aircraft circled around the mountain, and they all put their eyes on the porthole, but they didn't find a single hair.

This is not unexpected.

If those college students stay in the mountains and can be seen from the air, why don't they get out of this no-man's land on their own legs?

No matter which direction you go, you can meet people if you walk for dozens of kilometers.

Isolated all interference signals, Ye Qing took out a drone of the same type of electromagnetic radiation detector hanging on the belly of the drone.

The instrument comes with a Debra radar map for positioning, the green dot is the position of the instrument, and the red dot is the signal source.

The instrument was turned on, and the red dots suddenly came alive.

Three o'clock.

Wang Chailong volunteered and pulled out the mountain knife to open the way in front.

Ye Qing and the search team walked forward about a hundred meters, the position of the red dot was shortened by one-third, and the strength of the signal source was increased by 0.5 volts at the same time.

The search team roared, and they turned into "apes", armed with mountain knives, and rampaged through this primeval mountain forest.

Fifteen minutes later.

The position of the green instrument coincides with the red signal source.

However~

Several members of the search team, who were wantonly squandering their physical strength, looked at Ye Qing with confused eyes.

They stood in front of a relatively gentle hillside, and in front of them there were a few vigorous and upright pines and cypresses, and there were weeds half a man deep, and now the weeds had been cleared out by them, and they didn't look like they could hide people.

Ye Qing turned off the instrument and pointed to his feet.

It is impossible to make mistakes with the instrument, and the signal source is also very regular, not electromagnetic clutter interference in nature.

There's only one possibility!

These college students are in the rocks.

This answer is terrifying, whether they are dead or alive, Ye Qing can't guarantee it.

The members of the search team reacted quickly, and when they thought of that possibility, they immediately threw away their knives, took out their climbing hammers and chisels from behind their waists, and crouched on the ground and smashed the stones at their feet.

Ye Qing shouted strangely, "What are you doing?"

"Dig the ground!"

Wang Chai Long wielded a trekking hammer, "If these students are really in the rocks, there are two possibilities. ”

"One is that they were buried, and the other could be that they strayed into a cave or cave and ended up trapped in it. ”

"Personally, I prefer the second option because I don't see any landslides around here. ”

"Then you're going to smash it with your hands?"

"Let's smash it first. Wang Chailong showed a "then not" look.

"Stop. Ye Qing waved his hand, took out the communicator from the electromagnetic shielding bag, and called the aircraft that was on standby at high altitude.

A few minutes later, the Nighthawk flew over, with a large black box hanging from its belly.

The pilot beckoned the two search team members to lift the box to Ye Qing's feet, and the box was opened, and inside was a bulky metal device shaped like a jack.

"Bang~Bang~Bang~"

The pilot used a nail gun to nail the finger-thick fixing pin, along with the base of the equipment, into the rock.

Ye Qing motioned for everyone to stand farther away.

"Boom~"

There was a deafening explosion, and the device seemed to explode, and even the rocks below were shattered.

Of course, it didn't explode, it just used a disposable launcher to slam a hammer into the rock.

"Drop~"

On the tablet in Ye Qing's hand, a wavy stripe appeared.

The green streaks rippled across the screen, and in their place was a diagram of the interior of the mountain beneath everyone's feet.

Different objects have different vibration frequencies.

By using the shock wave to penetrate the mountain, the collected data can be processed into a mountain structure map.

Soon, the outline of an underground space appeared.