"Why is there such a big hole here?!" Bai Jie exclaimed.

Qu Xing in the helicopter looked at the hole below and asked a combatant behind:

"Bai Zheng, aren't you also from Xincheng? Do you know this cave?"

Bai Zheng frowned and replied:

"Although I am from Xincheng, I am not from Hefeng Town. I joined the army very early. I have not been in my hometown for many years and I don't know this cave."

Lao Bi heard their conversation on the intercom,

"Let's go back first, and when we get to the headquarters base, ask if there is anyone in this town.

Team Luo's side should be finishing soon, let's go and take over from them."

The helicopter flew back and passed several tall limestone mines.

Then I saw a helicopter hovering below slowly rising into the air. As the helicopter took off and left, another helicopter hovered and descended to that location.

Sizzling——

"Lao Bi, I'm going back to the headquarters base first. There's not much fuel left."

Hearing Lao Luo's voice in the earphones, Lao Bi quickly replied:

"Okay, you go back first, we will follow you later."

The headquarters base has electronic beacons for helicopters. Each of their helicopters can navigate according to the electronic beacons, so they don't have to spend time looking for them like when they came here.

Therefore, even if they are separated, they can still follow the electronic beacon and return to the Da Zhangshu base.

In order to save fuel, Lao Bi controlled the helicopter to hover around, maintaining the most fuel-saving state.

Lao Luo's helicopter was the first to receive people and received 26 people.

Now there were originally 105 Yu Wei and others down there, but more than thirty people died later. Now there are only 70 people left.

In other words, the next few helicopters only need to receive an average of 15 or 16 people.

The huge noise of the helicopter caused the zombies outside the electric truck's defense circle to become restless and collide with the electric truck body even more violently.

"You go up first, we are behind!" Yu Wei shouted to Master Luo.

Several of their outer city combatants have guns in their hands. Even if high-jumping zombies appear again, they will be able to deal with them.

Master Luo said with gratitude:

"Okay, Team Leader Yu, be careful, we're leaving first."

On this trip, if Yu Wei and the others hadn't come with them, all the people he led would probably have to stay here.

He quickly got out of the car, saw someone still carrying a package, and couldn't help scolding:

"Stop taking it! Just go up like this."

"But... but Captain, this food is hard-earned for us. What if someone takes it away if we leave it here?"

"What time is it? Hurry up and put them in the car. Do you understand if you take these things to the helicopter to increase the weight of the helicopter? You will definitely come back here tomorrow, so put them back quickly."

"Ok, I see."

At Sergeant Luo's reminder, those who had carried the packages put their weapons and food back into the car.

"quick!"

The combatants in the helicopter cabin above shouted towards the bottom.

Every second of hovering increases the chance of an accident.

No helicopter pilot would want to hover for a long time, because the hover operation is very dangerous, and fuel is the lifeline. At night like now, running out of fuel is a very fatal thing.

Once you land in the dark, no one knows whether there will be a large number of zombies on the ground.

Time flew by, and ten minutes later, the helicopter loaded another twenty people.

This means that the two helicopters at the back can carry fewer people, and they don't have to wait so long.

After all, the helicopter behind is still flying at this time. Although it does not consume as much fuel as the hovering helicopter, there will be normal consumption during flight.

"He Ma, you go down first, I will be last." Lao Bi used the walkie-talkie to contact He Ma in another helicopter and said.

"good."

Lao Bi controlled the helicopter to a height of more than 300 meters and looked down from the sky.

Wherever the searchlight shines, there are shaking zombie heads.

"There must be at least tens of thousands of zombies!" Qu Xing clicked his tongue in surprise.

"I feel more than..." Yu An controlled the searchlight and swung it left and right.

Bai Jie and Ma Di used the cameras they brought to zoom in on the zombies below.

Since the helicopter was constantly moving, most of the photos were not very clear.

Bang bang bang!

Several gunshots below caught Lao Bi's attention.

Lao Bi took the time to glance down, but the helicopter was too high to see clearly.

"what happened?"

Yu Weiwei gasped and replied:

"A few more high-jumping zombies ran in and were killed by us."

Lao Bi couldn't help complaining: "There are too many mutated zombies here."

After hearing Lao Bi's complaints on the intercom, Bai Jie thought for a while and replied:

"It's probably related to the hole below. We don't know how big the hole is, which means we don't know how many zombies are inside."

"In addition, the batch of wall-climbing zombies that were sent from Oil City last time have not yet fully mutated. I think the mutation of zombies may not only be affected by the number of viruses in the body..."

As she spoke, Bai Jie paused and said, "Forget it, I'll look at the experiment record sheet when I return to the base. Maybe I can verify my guess."

Half of what he said made Lao Bi speechless.

However, he didn't bother to think about what Bai Jie said. Most of his attention was now focused on controlling the helicopter.

After a while, He Ma looked at the remaining fuel life and quickly shouted to the people on the rope ladder behind him: "Take the rope ladder and tell them not to come up."

"good."

The combatants quickly pulled up the rope ladder.

After receiving more than a dozen people at once, there were only seven or eight people left.

He Ma saw that the rope ladder had been put up and quickly controlled the helicopter to fly towards the Da Zhangshu base.

"Captain, I'm going back first."

"good."

Quickly filling his position, he controlled the helicopter to land quickly.

The rope ladder was quickly lowered.

"You go first, Cao Le, hurry up!" Yu Wei saw another gap on the right caused by a truck being knocked open by a power zombie, and quickly shouted to Cao Le and the others.

He knew that this side might not be able to hold on for too long.

Cao Le and the others didn't waste any time and quickly grabbed the rope ladder and climbed up.

After all, they are also combatants, and their physical fitness is much better than that of the cooperators who have not received professional training. In addition, their skills are also better and they have received similar training, so they can climb extremely fast.

Bang bang!

Yu Wei quickly killed those power zombies.

But a large gap had been opened, and several zombies squeezed in from outside the first layer of defense circle.

"Team leader, come up quickly, you're the only one left!" Cao Le shouted loudly from the helicopter hovering more than ten meters above.

Yu Wei looked around and saw that everyone had retreated and he was the only one left in the truck.

Come down quickly, grab the rope ladder and climb up.

Boom, boom, boom!

More and more zombies poured in outside the second layer of defense circle, and among them another high-jumping zombie appeared.

Tread!

The high-jumping zombie jumped into the second defensive circle and collided with the truck.

Oh shit!

Cao Le held his breath, pulled out his gun, and took aim.

boom!

Kill this zombie with one shot.
To be continued...