Big camphor tree base.

In the first outer city.

After Lao Luo checked the list in detail, he found that three people were indeed missing.

After checking the time, these three people have not come back yet.

At this moment, he suddenly heard a car horn honking outside.

He said to Xiaoliu next to him: "Watch these people, don't let them go anywhere, I'll go out and check the situation."

After saying that, he walked towards the door of the greenhouse.

Opening the door of the greenhouse, he was surprised to find that the heavy fog outside seemed to have lightened up a lot.

In the haziness, he saw a sprinkler truck driving at an extremely slow speed.

There is another person standing on the roof of the sprinkler truck wearing protective clothing and constantly spraying liquid nitrogen in all directions.

Wherever liquid nitrogen is sprayed, the dense fog will instantly turn into light rain within a few seconds.

And as the wind blows, it carries the liquid nitrogen in the air to farther places, making the fog in the entire First Outer City become lighter.

After all, the outer city is semi-enclosed, and only the air can circulate.

There are walls on all sides.

Therefore, the heavy fog is not squeezed down so quickly.

If you are in an open place, spraying liquid nitrogen will have little effect, because after spraying, the surrounding fog will squeeze in, and it will soon return to a dense fog state.

Lao Luo breathed a sigh of relief when he saw that the fog outside had faded.

This is a good thing. As long as the people in the base can see clearly, people's hearts will be stabilized and those who cause trouble will not dare to take action.

After passing the First Outer City, the heavy fog in the entire First Outer City became much lighter due to the spraying of liquid nitrogen.

Later.

Lao Lu drove to the junction of the first and second outer cities, used the intercom to contact the personnel on duty above, and asked them to open the door.

The officer on duty used a searchlight to shine down and saw Lao Lu getting out of the driving position of the car and waving to him.

The officer on duty hesitated for a moment. After all, the city lord had just issued a notice, ordering that the city gates between the outer cities were not allowed to be opened at will.

So he picked up the walkie-talkie and contacted Li Yu. After Li Yu heard that it was Lao Lu, he ordered the person on duty to open the door.

Bah!

The person on duty turns down the switch.

Along with a roar, the city gate slowly opened.

When Lao Lu saw the city gate open, he got into the car.

The vehicle did not turn off. Lao Lu got in and drove directly into the Second Outer City.

After entering the Second Outer City, the vehicle continued to spray liquid nitrogen.

It is fully loaded with ten tons of liquid nitrogen, which is enough to spray the entire inner city. The first and second outer cities are quite small, and the liquid nitrogen in this car is enough for them.

The Second Outer City is relatively empty at this time, after all, there are no non-staff and cooperative personnel here.

Moreover, the people living in residential buildings are basically combatants, and at this time, a large part of the combatants are on the wall.

There is a mechanical maintenance factory in the second outer city, where some tanks and helicopters are also parked.

It is more important than the first outer city.

Under the spray of liquid nitrogen, the Second Outer City gradually became much clearer.

.....

In the duty room.

There were bursts of screams.

Li Yu listened to the screams, frowned, and said to the cannon:

"Take him to another duty room. It's too noisy here."

Cannon pulled the needle out of Goatee's fingernail.

Phew!

Blood spurted out from between the goatee man's fingernails.

"ah!!"

The goateeed man let out a shrill scream.

The cannon rubbed the slender needle, which was more than twenty centimeters long, on the goatee man's clothes.

Then he carried him outside like he was dragging a dead dog.

Li Yu looked at the back of Cannon leading the man away, a flash of anger in his eyes.

no doubt.

This man must have been instructed by people from the Northern Federation.

Originally, Li Yu also expected that some traitors would come in, but he did not expect that they would be so restless.

He actually took advantage of the foggy weather to cause trouble.

"Second uncle, have you talked to Lao Xie and the others?" Li Yu turned to his second uncle and said.

"As I said, Lao Xie said there hasn't been any movement among the people in the Northern Federation for the time being. I told him to be more vigilant," the second uncle replied.

Li Yu nodded and continued: "Is there still no heavy fog over there in Oil City?"

The second uncle replied: "Yes, not yet. In this foggy weather, although the Oil City can produce liquid nitrogen, the production volume is limited. Ju Tianrui means that the oil pits outside the wall can be released.

Combustion can evaporate water and provide lighting, which should be able to resist zombie waves and invisible problems."

Li Yu felt a lot relieved when he heard this method.

The method of burning oil is a good method whether it is for lighting or blocking zombies.

The only disadvantage is that it requires a lot of oil.

But what the Oil City is most in need of is oil.

As liquid nitrogen is continuously sprayed in the base.

The heavy fog in the inner and outer cities gradually dissipated, forming small and medium-sized fogs.

However, since the entire Da Zhangshu Base is not sealed, there is still heavy fog blowing downward from the sky.

This means that as long as the spraying of liquid nitrogen is stopped, the heavy fog will cover the entire base in a short time.

After the heavy fog dissipated a lot, everyone who retreated to the base building felt a lot more at ease.

Some people who had not evacuated in time also returned indoors from outside.

When the heavy fog filled the air, Li Hang happened to be in the machinery maintenance factory and saw that the fog had dissipated somewhat.

So he quickly came out of the machinery maintenance factory and returned to the inner city.

When returning to the inner city from the second outer city, you don't need to pass through the first outer city. You can pass directly through the urn city between the inner city and the second outer city.

But in the Wengcheng where the second outer city leads to the inner city, Bai Jie and his research lab is right here.

Li Hang arrived at the gate leading to the inner city from the Second Outer City and was about to ask the person on duty above to open the door.

Suddenly he saw a person sneaking up behind him.

He instantly recalled the news that his second uncle had just announced on the walkie-talkie.

This chapter is not over yet, please click on the next page to continue reading! Three of the group of experts from the Northern Federation secretly ran out of the greenhouse.

Pretending to raise his head and shout to Song Min above, "Sister Song, I am Li Hang."

The words just fell.

He immediately turned around and ran towards the man who was following him furtively.

When the man saw Li Hang turning his head, he immediately turned around and ran away.

It's a woman!

Li Hang vaguely saw this man's clothes in the mist, which were red.

"If you run away again I'll shoot!"

Li Hang shouted loudly.

However, the woman ignored him and ran towards the machinery maintenance factory.

boom!

Bullets fired.

Hit the woman in the shoulder.
To be continued...