Then, the second to respond was Luo Li.

He set up his rare-quality assault rifle, aimed it in the direction of the intruder team, pressed the trigger firmly, and fired all 25 bullets in the magazine in one go.

The mechanical manipulation skill from the mechanic also has a bonus to the shooting of the assault rifle.

Although it can't keep up with the accuracy of the ranger's full-level skills, but with enough numbers to make up for it, it can still cause huge damage.

Rifle bullets at nearly twice the speed of sound interweave into a dazzling fire net, rolling towards the unprepared enemies behind.

Accompanied by the sound of tinkling metal shell casings falling to the ground and the choking gunpowder smoke, only Luo Li and the rangers were left standing in the entire passage.

"Calculate the position of the load-bearing wall and place the bomb. The target will blow down the first to fourth floors of the basement."

Luo Li quickly issued a combat order to the Rangers.

Then put a new magazine on his rifle, and slowly retreat to the depths of the second floor along with the rangers who started to deploy.

Before retreating, Luo Li made a few simple traps with grenades behind several doors.

These traps don't need to kill the enemy, as long as they can delay for a few seconds, their value will be considered.

"The layout of the second floor is complete, and the next stage will be the location of the fourth floor."

The work efficiency of the ranger has reached a limit under the planning of the smart chip.

After only one minute and forty-five seconds, the blasting arrangement for the second underground floor was completed.

Immediately afterwards, it swung its own polymer cutting knife, destroying the floor under its feet.

Descend from the top of the head to the fourth floor underground, and begin to repeat the layout of the second floor.

At this time, the intruders had not yet reached the fourth basement floor.

Perhaps because the only exit on the ground was firmly blocked, the intruders who entered the ground were not in a hurry.

The search is based on caution and reducing the casualty rate.

Only after the upper layer has been completely controlled, can the next layer be explored.

This gave Luo Li their chance.

Letting the rangers plant bombs on the fourth floor underground, Luo Li took advantage of this time to return to the refuge room.

The three lieutenant colonels and officers transported materials in a similar way to Luo Li.

They directly blasted through the floor of the armory and carried out the transfer on the spot.

When Luo Li came back, they had almost moved everything they needed.

At this time, he was dragging a cart on the sixth floor of the basement to pull things to the water pump area.

Disassemble the power supply of the two emergency lights in the refuge room.

Luo Li used the night vision device on the tactical helmet to connect the removed power supply to the computer in the refuge room in the dark.

On the desktop in the middle of the room, white light flickered slightly, and a three-dimensional holographic map resurfaced.

"There are more than a thousand people around the entrance? You really think highly of us."

Luo Li's gaze paused for a moment at the surface entrance of the refuge room, then continued to move down.

There were about 70 intruders who entered the ground.

Except for a small number of people staying on the first three floors, most of the rest are divided into three teams and are heading towards the fourth floor.

"I don't know if I can lure some of the people on the ground down."

This kind of opportunity to kill all enemies in one fell swoop is so good that Luo Li couldn't help but have extra thoughts.

But he just thought about it for a while, then shook his head regretfully.

"Don't be too greedy."

It is impossible for any rational commander to rashly invest heavy troops in complex underground buildings.

If you show too strong firepower, it is likely that it will not attract the enemy's continued increase of troops, but chemical weapons, incendiary bombs and other strikes.

After waiting for about a minute, Luo Li received feedback from the Rangers.

"The layout is complete, and the blasting process is expected to take 1.75 seconds."

Five seconds later, the returning ranger appeared in the dark refuge room.

"goodbye."

One last glance at the intruders gathered on the fourth floor underground on the three-dimensional map.

Luo Li walked into the armory room next door first, followed the path opened by the three lieutenant colonel officers, and jumped into the sixth underground floor.

At the same time, the bombs arranged by the rangers were detonated by him at the same time.

Accompanied by a series of overlapping dull explosions, the entire first four underground floors collapsed instantly.

"System prompt: kill x64 ordinary soldiers, +372 experience points."

"System prompt: You have received the bonus of the mechanical heart effect, and the experience value obtained has been changed to +3720."

Solved the problem of chasing soldiers, and also blocked the entrance tightly by the way.

In a short period of time, Luo Li was considered to be inside a relatively safe fortress.

This allowed him enough leeway to make more comprehensive preparations before entering the underground river.

Coming to the water pump area, Luo Li manipulated the mechanical power arm to disassemble the water pump into parts, and loaded the propeller inside to the ranger.

Then do some waterproof treatment again.

After the treatment, all the weapons on the ranger were temporarily unusable except for the polymer cutting knife for melee combat.

Correspondingly, it is possible to dive into the water and obtain certain underwater action capabilities.

Because the time is relatively loose, Luo Li did not invest psionic energy to speed up.

More than ten minutes had passed by the time all the modifications were completed.

The ceiling began to vibrate faintly again.

This means that the enemies on the ground have not given up and are still trying to break through the ruins.

"Are we really going down here?"

Standing at the entrance of the water pipe with the cover removed, a young subordinate who looked like a civilian was on the side of the lieutenant colonel officer, with a hint of fear on his face.

He flinched and looked down.

The pipe was about two meters in diameter, and the pipe was cold and deep even under the light of the portable lamp.

At the end of it, it is connected to an area that has never been visited by humans since ancient times.

No one knows what will happen inside.

As an ordinary person, a civilian youth instinctively has a fear of the unknown world.

"It's like walking a section of the sewer, it's no different."

Luo Li's mind is very relaxed. Compared with the fierce battle after entering the starry sky in the previous life, this is really just an ordinary rush.

He looked at the entrance and thought for a while, then said, "Let me lead the way."

Although the three lieutenant colonel officers are all federal soldiers, they have experienced orthodox martial arts training.

But their grades are not high.

The threshold between ordinary people and superhumans has not been crossed.

As the most powerful person in the field, Luo Li is actually duty-bound.

This is also the remuneration that Luo Li has to pay after receiving free ammunition supplies before.

next.

The preparations that should be done are all done, and there is no need to hesitate.

Luo Li manipulated the rangers to be the first to slide down while grabbing the erected rope.

He himself followed closely behind.

After a few minutes.

Luo Li successfully reached the water deep in the ground.

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