The thick fog seemed to be above the head, giving people the illusion that they could touch the sky with tentacles.

"Um?"

Ju Tianrui suddenly felt a chill on his face and reached out to touch it.

It's raining?

He realized in an instant that it was the ministers and the others who sprayed liquid nitrogen that had the effect, causing rain.

Pammer.

The rain fell on the wall and fell into the burning flames outside.

The rain fell on the burning oil, which not only did not extinguish the flames, but instead caused a more violent combustion and made crackling sounds.

In the sky.

The two helicopters dare not land, for fear that they would hit the wall or building when landing, which would lead to the destruction of the plane and death.

Lao Qin stabilized the helicopter and watched the thick fog below fade at a speed visible to the naked eye.

Ten minutes later.

Lao Qin squinted his eyes and saw the flames below, so he excitedly shouted to the third uncle behind: "Captain, I see the flames below."

"Firelight?" Uncle San thought about it carefully.

He remembered that in the Oil City, Ju Tianrui said that he used the method of burning oil to consume water vapor to restore his sight.

A little at ease in my heart.

Immediately afterwards, he received a message from Ju Tianrui using the walkie-talkie, and it was already raining below.

Through these two points, Uncle San was sure that they had indeed come to the sky above the Oil City.

So he shouted to Lao Qin: "The helicopter descends to an altitude of 1,000 meters!"

Upon hearing this, Lao Qin simultaneously contacted the jackal of another helicopter with a walkie-talkie, and then controlled the helicopter to land slowly.

Because they are at an altitude of three thousand meters, they are too far from the ground.

When liquid nitrogen is sprayed, it is blown away by the wind. At the same time, the liquid nitrogen is also consumed by the thick fog, so it is still impossible to see the situation in the Petroleum City clearly.

The helicopter descended slowly.

Liquid nitrogen continues to spray.

Ju Tianrui below felt that the rain seemed to be getting heavier and heavier.

The sky above seems to have also become higher.

A few minutes later.

Su Yuan pointed to the sky excitedly and shouted: "Look, is that helicopter?"

In the drizzling and shadowy rain, Ju Tianrui looked in the direction Su Yuan pointed with his finger.

Sure enough, he saw a helicopter. Although it was vague, he was sure that it was a helicopter.

So he quickly picked up the intercom and contacted Uncle San: "Minister, I saw your helicopter. Can you see us?"

Uncle San looked at the oil city that was pushing away the thick fog, and the flames were burning around him, causing the heat to evaporate, and the walls were reddished by the flames.

"Captain, this visible distance has reached the minimum requirement for helicopter landing. Should we land now?" Lao Qin shouted to Uncle San.

Uncle San thought for a while and said, "Don't worry, notify Jackals and the others, go around the oil city, spray liquid nitrogen for another five minutes, and wait until the vision is better before landing."

"Okay." Lao Qin did not talk nonsense and controlled the helicopter to land slowly.

During the landing of the helicopter, the fuselage trembled slightly, but Uncle San stood very steadily and was not affected.

Then, when it landed at an altitude of 300 meters, the helicopter circled over the oil city and circled the entire oil city.

It was raining lightly throughout the city. In the light rain, the appearance of the oil city became clearer.

A few minutes later.

Uncle San turned around and tightened the liquid nitrogen valve, then pulled the tube back, and closed the hatch door.

Just then, his hands were shaking because of the cold.

There was a cheer in the oil city, and people on the ground could not hide their excitement when they looked at the clear scenery around them.

The helicopter landed slowly.

Lao Qin controlled the helicopter and flew accurately towards the direction where the apron was located.

Ju Tianrui also got off the wall and hurriedly walked towards the apron.

Two hours after the thick fog hit, zombies have come one after another, but the number of zombies is not large.

And the oil array was ignited, igniting hundreds of zombies.

At this stage, zombies are not worth worrying about.

But if the foggy weather continues, the number of zombies will definitely increase. At that time, zombies will form a stack.

But even at that time, they were able to use small mobile swords to remove stacked zombies.

soon.

Ju Tianrui, Dongtai, Xiao Jun, Ma Sailong, Guo Peng, Li Qi and others gathered in the distance of the apron. They dared not get close to the apron, for fear that it would affect the landing of Uncle San and the others.

Buzzing-

The helicopter rotor rolls up the surrounding water vapor and forms a vortex.

The helicopter landed.

Dong!

When the helicopter actually landed, Lao Qin breathed a sigh of relief.

Put your heart on your stomach.

"Captain, we landed."

Uncle San glanced at him, opened the hatch door and jumped down.

It was still raining outside the helicopter, and another helicopter also landed simultaneously, but the water from the rotor flew onto Uncle San.

Uncle San blocked it with his hands and walked towards Ju Tianrui and others not far away.

The liquid nitrogen just sprayed can last for about an hour.

In an hour, the oil city will return to its original state.

Compared with the Dazhangshu base, the personnel composition of the personnel in the oil city is simpler.

Except for more than 200 people who were originally in the Oil City, the rest belonged to the combatants or non-staff members of the Dazhangshu Base.

So even though the fog is everywhere, there has been no rebellion here.

"Minister." After Ju Tianrui saw his third uncle, he hurriedly walked towards his third uncle.

Uncle San nodded, then pointed to the helicopter behind and said:

"Please let someone add fuel to the helicopter and replenish liquid nitrogen."

Ju Tianrui quickly said to Xiao Jun next to him: "Xiao Jun, go and do it."

Then he said to Uncle San:

"Minister, Yu Wei and the others have flew to the Northern Federation in a helicopter."

Uncle San asked quickly:

"How long have they been?"

Ju Tianrui glanced at the time on his watch and replied: "An hour and a half have passed, and they will be able to reach the northern border in two hours."

Uncle San frowned: "Can you bring everyone back?"

"Can."

Ju Tianrui continued without hesitation:

"I have brought back some of the people before, and Li Qi and Guo Peng and others have returned this time."

Uncle San thought for a while, then looked around and asked, "I just saw the burning of oil outside the city in the sky, and the effect was good. Did you use liquid nitrogen spray in this city?"

Ju Tianrui hesitated and said, "The production of liquid nitrogen cannot keep up with the consumption, so it is just a spacing spray, and it only needs to be able to keep it a few meters away from the city."

Uncle San sighed. The problem of producing liquid nitrogen is indeed limited.

The infrastructure in the oil city is not as good as the Dazhangshu base, which is understandable.

Xiao Jun and his men quickly filled the fuel into the helicopter.

This trip, the third uncle and his friends had to fly from the Oil City to the North, and then they would not stop in the North. After dropping potions over the North, they immediately returned to the Oil City.

But this will face a problem, that is, their accuracy of the drug they put on. Under the fog, they cannot see the ground above the Northern Federation.

If liquid nitrogen is sprayed, it will definitely be discovered by the Northern Federation.
To be continued...