However, due to a big explosion in the leprosy village and the entire nest city being sealed off, the construction site has been suspended.

Strong diggers are naturally the best sources of soldiers for major gangs.

They were originally affiliated with construction companies affiliated with major gangs. Now they have replaced pickaxes, impact drills and rock crushers with more lethal swords and firearms to resist monsters and maintain order.

The entire construction site was empty, with only a few guards patrolling back and forth.

"The secret passage I discovered is deep inside the construction site, but you have to bypass these guards." Aji whispered.

Meng Chao released a ray of spiritual energy and quickly scanned the surrounding area.

He disappeared silently into the darkness.

When he appeared again, he had a fat mouse with big ears and shiny fur in his hand.

Meng Chao pinched the mouse's neck to prevent it from making any sound.

Then, he aimed behind several guards and threw them far away.

He enveloped the mouse with a ball of spiritual energy, forming a spiritual magnetic force field around the mouse that was similar to a cushioning air cushion.

The mouse landed lightly and was not injured. It was just frightened, squeaking and running as hard as it could.

The attention of several guards was immediately attracted to the rat.

Chase the mouse's tail into a corner to investigate.

Meng Chao and Aji took the opportunity to sneak into the depths of the construction site.

"It should be...here!"

Aji groped on the wall for a moment and said with certainty.

Meng Chao also touched the place he had just touched.

I found a slight unevenness on the wall, which seemed to be the character "吉".

It's like scraping it out gently with a blade or screwdriver. Under dim light, it can't be seen clearly with the naked eye.

Only people with a very keen sense of touch can touch this mark by rubbing it carefully with their fingertips.

Aji said that these were the marks he made along the way when he escaped from the alloy arena last time.

Following the mark, not long after walking, two huge pipelines appeared ahead.

A pipe with a diameter of more than two meters was rumbling inside, like a roaring wind.

Most of the buildings in Nest City are located underground, so air circulation is naturally a major issue related to the lives and fortunes of countless people.

Therefore, the diameter of the ventilation ducts here is more than three to five times that of the buildings on the ground. There are also large industrial fans that rotate at high speed to ensure that fresh air from the ground can be input into the ground unimpeded.

Of course, because the nest city is shrouded in flames and thick smoke, the air sucked into the underground at this moment is also full of highly polluted and highly corrosive small particles. Inhaling it into the nasal cavity? Burning pain? If you breathe in too much, you will feel like the world is spinning? Breathe

Difficulty? It’s as if the lungs have turned into hard plastic.

Meng Chao and Aji were not prepared to sneak into the alloy arena through the ventilation ducts.

Because the high-speed rotating industrial fans in the ventilation ducts are very difficult to deal with, there are also defensive measures such as filters equipped with alarm systems, high-voltage power grids specially designed to deal with snakes, insects, rats, and ants.

Ordinary snakes, insects, rats, and ants will be electrified to ashes in an instant if they accidentally enter the ventilation duct.

Neither Meng Chao nor Aji wanted to taste it? The smell of being electrocuted to pieces? The smell of green smoke.

There is also a pipe with a slightly narrower diameter next to the ventilation duct.

Cables, optical cables and crystal cables are laid inside.

It can also reach deep into ventilation ducts, mechanical and control units of industrial fans, and be used as maintenance ducts.

Although the diameter is less than one meter, it is not a big problem for Aji, who is already thin, and Meng Chao, who has extremely good control over his body.

Before the guards came back, the two ducked into the maintenance pipe.

They crawled in the dark for more than ten minutes in the maintenance pipeline, passing four forks along the way.

Aji said that when he escaped, he left marks at every intersection.

Sure enough, Meng Chao touched the crooked word "吉" on the inner wall of every pipe.

Sometimes there is an arrow pointing to which fork in the road there is.

With the help of these marks, they accurately sneaked through the three-dimensional maze-like maintenance pipes without losing their direction even once.

Finally? The maintenance pipeline reaches its end.

Meng Chao looked at Aji.

"above."

Aji pointed to the top of his head.

Meng Chao groped carefully again.

I didn't feel the mark this time, but I felt a gap in the sealing cover and four huge nuts.

The nut is tightened so tightly that the cover plate is almost integrated with the pipe.

But this didn't bother Meng Chao. He took out a tube of monster slime from a military backpack that looked like a treasure chest, and used a small brush to apply it carefully on the gap between the nut and the cover.

After a while, a "chichi, chichi" sound came from the joint between the cover plate and the pipe.

Unscrewing the nut will be much easier.

Lifting the cover, there is a reserved shaft above, which is dark and goes straight to the ground. It is probably not hundreds of meters high.

A similar structure can be used not only as a strong and weak current well, but also for transporting guns, ammunition and various supplies needed for survival. When necessary, it can also serve as a temporary escape passage.

Unfortunately, the ancillary facilities of the Alloy Arena have not yet been completed, and there are no escalators or climbing openings on the four walls of this shaft.

The walls were bare and there was nothing.

Meng Chao felt the roughness of the well wall.

It was found that the well wall was simply smeared with a layer of cement, and the particles were very rough and covered with bumps and convexes of a few millimeters.

With the help of a few millimeters of force point, he can easily drag hundreds of kilograms of objects up.

"Do you need me to carry you?" Meng Chao asked Aji.

"Need not."

Aji shook his head and said stubbornly, "I can do it."

Meng Chao took a deep look at the leprosy boy, nodded and said: "Okay, I'll go up first, you be careful!"

He was like a huge gecko, climbing up the well wall silently.

The ten fingers clearly did not have any glue or mucus applied on them, but they were firmly attached to the rough cement surface.

A military backpack filled with guns, ammunition and various supplies was hung securely behind his back.

Meng Chao climbed up dozens of meters in one breath.

Aji followed him, his crawling speed was obviously much slower, and he gradually distanced himself from Meng Chao.

Meng Chao seemed to be so focused that he didn't notice the movement behind him.

Suddenly, the leprous boy seemed exhausted, his arms trembled, his palms became sweaty, his hands slipped and he fell.

Meng Chao heard the exclamation and immediately flew to the rescue.

Unfortunately, Aji exclaimed and danced wildly with his hands and feet, just in time to avoid Meng Chao's helping hand.

He fell back to the bottom of the well hard, and his left ankle made a "click" sound.

"Aggie!"

Meng Chao then landed, frowning slightly and looking at Aji's left ankle.

The boy with leprosy's left ankle was as swollen as a steamed bun fresh out of the steamer, big and hot.

He grimaced in pain, and tears of pain and unwillingness rolled in his eyes.

"I, I'm fine, Brother Chao, I can do it."

He struggled to stand up, but it hit a painful spot. He groaned, and tears and snot rolled down like a flood from a dam.

"I, I'm afraid I can't survive, Brother Chao."

Aji said with a sad face, "My ankle is sprained. I'm afraid I won't be able to keep up with you, let alone sneak into the alloy arena quietly without being discovered by the guards..."

Meng Chao closed his eyes, groped carefully for a moment on his ankle, and said, "Fortunately, no bones were injured, but the tendons were slightly strained. It will heal after a few days of rest.

"Then, just stay here and wait for me. I will leave you the first aid kit and these foods, which can at least sustain you for a day and a night.

"If you still can't hear from me after a day and a night, it's probably going to be very bad, so just ask for good luck!"

"Brother Chao——"

Aji said guiltily, "It's all my fault that I fell down the shaft. I, I don't know what happened. I wish I had listened to you just now and let you carry me up on my back!"

"It doesn't matter."

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To be continued...