Big camphor tree base.

The second uncle tried to persuade him many times, but Li Yu still insisted on his original idea.

The existence of the northern border can bring considerable benefits to the Da Zhangshu Base.

Whether from a long-term perspective or a strategic perspective, TC is a very unwise choice.

But.

Li Yu also has his own considerations.

He wasn't just acting out of impulse.

Originally, the Northern Federation was much larger than the Great Zhangshu Base and had very strong war potential.

Once the people of the Northern Federation figure out the zombie attracting agent one day, and even as they send people to infiltrate the Da Zhangshu base, one day the Da Zhangshu base will face unbearable consequences.

The Northern Federation feels like its tail is too big to lose.

What's more, the feud between the Northern Federation and the Federation is so deep that it affects one belt and three.

He just killed a few leading people, or some people, but there is no guarantee that other people will be drawn out one day. And if these people are deeply hidden, then as time goes by, when he reaches a certain level at the Da Zhangshu base,

Height will always lead to unpredictable consequences.

This is what Li Yu is most afraid of.

When he does things, he always pays attention to cutting through the mess with a sharp knife.

Only by eradicating the root cause can more countless troubles be avoided.

Therefore, he has made up his mind.

TC is a foregone conclusion.

.....

Seeing that he couldn't be convinced, the second uncle had no choice but to accept it, and began to think about how to make it more perfect according to Li Yu's idea.

at the same time.

Dazhangshu Base, in the Second Outer City.

A helicopter slowly took off.

In the thin fog, the helicopter slowly rose to an altitude of more than thirty meters.

And this height is exactly the height of the fence at the Da Zhangshu Base.

So far, Lao Bi can still see clearly when he looks around.

Although there is fog around, it is not that dense.

Further up, you will fly into an invisible thick fog.

Lao Bi tensed his mind, and then said to He Ma in the cabin: "Get ready to release liquid nitrogen!"

"Okay." He Ma replied quickly.

The helicopter slowly rose again, and soon it entered a thick fog.

Lao Bi's nerves were tense. He firmly stabilized the helicopter and maintained a straight upward posture.

Crash--

He Ma opened the hatch and at the same time put the mask he had prepared on his face.

He was pulling the liquid nitrogen spray pipe, and a safety belt was tied around his body.

He staggered to the cabin door.

呲呲呲——

Liquid nitrogen rose and sprayed out one after another, swaying downwards due to the influence of gravity and wind.

With the action of liquid nitrogen, the heavy fog under the helicopter slowly dissipated.

When He Ma saw this scene, his eyes were full of excitement.

Sudden.

The fuselage shook violently.

He quickly held the handle on the side of the machine door with his hand and operated the liquid nitrogen spraying device with one hand. It was a little unstable, but he persisted.

I thought that I would have to find something to fix it after landing, otherwise it would be too tiring to just carry it with my hands.

After a few seconds, the helicopter returned to calm.

The effect of liquid nitrogen spraying is very significant.

Originally at high altitude, liquid nitrogen falling downwards can melt the fog to the maximum extent.

Lao Bi looked down through the car window, and the view from the ground was indeed much better.

My heart is excited.

So he controlled the helicopter to move in the sky.

Turned in a circle.

As the helicopter sprayed liquid nitrogen, everything on the ground gradually became clear.

And this is especially obvious to the people on the wall.

The patter of rain.

Feeling the rain falling from the sky, they raised their heads and looked at the helicopter in the sky.

Li Yu also stood on the outer city wall at this time and witnessed all this with his own eyes.

He breathed a long sigh of relief.

The method he thought of... works!

So I picked up the walkie-talkie and contacted Lao Bi: "Lao Bi, expand the area a little more and spray liquid nitrogen around the entire camphor tree base to see how long the lasting effect lasts?"

After Lao Bi received Li Yu's order from the intercom, although he was a little unsure, he still gritted his teeth and operated.

The helicopter moved in a wider range and flew around the Da Zhangshu base in a large circle.

When liquid nitrogen is sprayed from high in the air, as the wind blows, the liquid nitrogen is sprayed more evenly below.

It started to rain lightly throughout the base.

Before the end of the world, this was so-called artificial rainfall, but most artificial rainfall used dry ice.

The entire camphor tree base becomes clearer with the spraying of liquid nitrogen.

Lao Bi, who was hundreds of meters above the ground, almost jumped for joy when he saw such a clear base of the big camphor tree.

"Success! We succeeded!" Lao Bi shouted to Li Yu with some excitement.

Li Yu's mood also became much better.

So he picked up the walkie-talkie and asked: "How much liquid nitrogen is left in the helicopter, and how long can it last?"

After hearing Li Yu's question, Lao Bi quickly asked He Ma behind him and found out that there was about four-fifths left, and he could continue spraying for more than 20 minutes.

Li Yu ordered Lao Bi to spray half of the liquid nitrogen in the helicopter before flying down.

He wanted to see what effect he could achieve by spraying half of the liquid nitrogen.

It rained all the time.

Within a hundred meters of the fence, it also started to rain lightly due to the spraying of liquid nitrogen from helicopters.

However, a hundred meters away, there was still a thick fog.

Ten minutes later.

The entire camphor tree base took on a new look in the light rain.

A peculiar scene formed. There was thick fog all around with the Big Zhangshu Base as the center, but it was only drizzled here at the Big Zhangshu Base.

In light rain, the field of vision is not much better than in heavy fog.

Lao Bi piloted the helicopter and slowly landed in the Second Outer City.

Li Yu is waiting here with a silver box.

After the helicopter docked and stabilized, Lao Bi walked out and walked towards Li Yu with a smile on his face.

"City Lord, we succeeded!"

Li Yu nodded, and then shouted to Lao Bi:

"Quickly fill the other helicopter with liquid nitrogen and fuel, and prepare to leave for Oil City later."

He Ma, who was standing behind Lao Bi, quickly came out and said:

This chapter is not over yet. Please click on the next page to continue reading! "City Lord, can you give me ten minutes? I was too tired just now when I was spraying liquid nitrogen with my hands. I can't hold on for long and my hands are shaking. Please give me ten minutes."

Time, I’ll make a simple stabilizing device.”
To be continued...