These professional burrowing experts know how to dig out more soil and larger space with the least effort, and the dug caves can be very strong and safe!

It is said that there is a specialization in the art, and when it comes to digging holes for stealing, these people are really experts.

With so many people working together, the efficiency is extremely high. The brother who was cleaning the dirt outside the cave entrance was exhausted.

However, around the main cave Yu Fei dug, they quickly dug out branching roads. Because they were for storing air, they were very spacious and mainly large.

And Yu Fei was still working hard to get to the ground. The underground was extending in all directions. He didn't even know how far the ground was from the ground. According to the original depth they went underground, it should be about fifteen meters, but he didn't know where they were now.

The location deviates from the previous underground location, so it's really hard to say. The most important thing is to dig with all your strength.

Everyone is working hard, because everyone knows that hard work is for everyone to survive, and also for oneself to survive. One more breath of air means more hope of survival.

But not long after everyone was digging with all their strength, the eighth sound was triggered, and the sound of boulders falling to the ground was heard!

Hearing this movement, Yu Fei counted silently for half a minute before finally speaking.

"Brothers at the bottom, stop cleaning the soil at the entrance of the cave. Block the entrance as quickly as possible. The tighter the blockage, the better. It's too late!"

Yu Fei shouted loudly. His voice could spread far in this confined space. In fact, everyone was working hard and there was no noise, so everyone could hear it clearly!

The reason why Yu Fei said this was because his sixth sense gave him a strong sense of crisis, and he was almost certain to die!

So he was almost certain that when the ninth boulder mechanism was triggered, the mechanism to kill all would be activated!

The terrifying lake water pours down, and no one who has time to escape will survive!

Even if it is Yu Fei himself, with the corrosive effect of the lake, Yu Fei's healing effect will definitely not be able to heal him in time!

And those tomb robbers, after hearing Yu Fei's words, never dared to doubt that the brothers who were cleaning the soil at the entrance of the cave immediately gave up cleaning, quickly piled up the soil near the entrance of the cave, and then retreated step by step into the entrance of the cave they dug.

They not only know how to dig holes, but also how to fill them, how not to leave traces, how to make the filled holes very strong, and how to stuff more soil back. These are all technical tasks, and they are all theirs.

Things you need to know in your daily work!

So they definitely didn't just pile the soil in, but someone transported the soil, and someone was responsible for stepping on the soil or compacting it with heavy objects.

Just when they blocked the entrance of the cave, and blocked more and more, the sense of crisis that Yu Fei's sixth sense conveyed to him began to decrease!

Although the corrosiveness of the lake water is very strong, the soil is the most powerful action. There are many things that cannot be contained in containers, but soil can!

Because soil is the product of thousands of years, its stability and other aspects are incomparable to other things!

So as long as the cave is backfilled by them well enough, no matter how strong the lake is, it won't flow back!

Yu Fei continued to dig. After his sixth sense sensed that the danger had dropped to a critical value, which actually meant that the sense of crisis that they were trapped underground was all that remained, Yu Fei spoke again.

"I just need to clean up the soil I dug, and everyone else should stop!"

Yu Fei said loudly.

The reason for this decision is that people consume a lot of oxygen during strenuous activities, so the most important thing now is to save energy, which is equivalent to saving air!

In fact, if Yu Fei breathes the air here alone, he can live for a long time. He can only breathe once every half an hour, and then rely on spiritual energy to support his body.

But others can't. They need to breathe all the time, so if they consume it casually, they will soon consume all the oxygen here!

These tomb robbers also understand this truth, so they stop immediately when they should stop. They even find a suitable position and start motionless, without even speaking, to save energy as much as possible. In fact, they are also saving oxygen.

At this time, fortunately, Yu Fei could help them dig into the ground with all their strength. In order to save oxygen for these people, Yu Fei even started to hold his breath, not breathing himself, and used spiritual energy to support his body's consumption.

But after digging like this, Yu Fei felt that it was twenty meters high, but it hadn't reached the ground yet!

Yu Fei immediately realized that something was wrong. He knew that not only had they deviated from the originally dug passage, but they had even deviated so seriously that they might have entered the interior of the mountain. Otherwise, it would not have been difficult to reach the ground after digging for so long.

But Yu Fei, you don't know where they are, so digging upward is the fastest way to reach the ground.

Normally, no one knows how to cherish the air that everyone can easily breathe, but at this time, they finally know how important and rare air is.

Because they know that every time they take a breath, this air will become less. Once the oxygen is exhausted, it will be their death!

Yu Fei was digging desperately on it alone, much more efficiently than them. They were also very grateful to Yu Fei, because Yu Fei really saved their lives not once or twice!

Before Yu Fei dug into the ground, Yu Fei suddenly felt the earth shaking slightly!

Then his movements paused slightly, because he knew that the last boulder trap was triggered, and the water inflow from the lake was about to begin!

Those people who are still in the maze at this moment are all dead!

But Yu Fei couldn't care about those people anymore and could only dig out quickly, because he wanted to take all these people out alive. These were all living human lives, and he could save one by one!

The other tomb robbers also felt the vibration. They didn't know what it meant. They just knew that every time the huge stone mechanism was triggered, Yu Fei became nervous!

Although the people who entered the megalithic mechanism were just shocked, they knew that if they accumulated too much, it might kill everyone!

In fact, they quickly guessed that if there was something that could really kill everyone, it would be the highly corrosive lake water in the fake tomb above their heads!

Thinking of this, they all felt horrified. If that thing were poured into the tomb, everyone would be dead!

And they feel that people will definitely die in a very painful way. The suffocation caused by the horrible liquid and the pain when it corrodes the human body are definitely one of the tortures!

So they were very lucky that Yu Fei's leadership could allow them to come out alive. If it weren't for Yu Fei, they might be one of the people below at this moment!

Even though they couldn't get out of the maze, the all-pervasive lake could definitely fill up all the space!

But this was not the main thing they had to think about, because they found that there were too many of them, and the oxygen seemed to be insufficient!

Because they began to have difficulty breathing, their chests began to feel tight, and people began to feel dizzy.

But at this time, they haven't reached the ground yet!

They finally realized that they had deviated from their original position and might have arrived at a location with thicker soil such as a mountain!

This is really not good news. If this is the case, plus the height of the mountain, I don’t know how long it will take to dig to the ground!

But they are not helpless, they are all professional country rats!

They began to recall the scene when they came here to see the direction of the Feng Shui dragon veins, then speculated on the location of the tomb, and then guessed which terrain around them they were under!

Soon they were almost done with the calculation. Someone took out the compass and Simon started to calculate!

"I know where we are! This is a hill, we should be on the northeast side of the hill!"

"We have not found any magnetic anomalies here before, so there is absolutely nothing wrong!"

"So we have to return to the ground. It is fastest to change the direction and dig to the northeast!"

"Hero, dig in the northeast direction. I marked it for you on the compass. You dig in the direction where the red pointer coincides with the red point I marked, and you can get out as quickly as possible!"

After the man figured it out, he hurriedly came to Yu Fei with the compass.

"good!"

Sure enough, there is a specialization in the art. Yu Fei was lamenting before that his only option was to dig upward because he could not determine the location. These people could actually use these things to determine their location underground. It was really too powerful.

, every knowledge is really useful!

Yu Fei quickly changed his direction according to the other party's instructions.

"Hero, the mountain in the northeast is steep. You can dig close to the side. If you dig upward, it is the fastest straight line to get out of the ground!"

After the man made another estimate, he hurriedly told Yu Fei.

After Yu Fei adjusted the direction of the excavation again, others continued to assist Yu Fei in transporting the soil excavated back.

The tomb robbers followed closely behind, really hoping that it would suddenly be dug out and a lot of fresh air would flow in, because their sense of suffocation was getting stronger and stronger!

Experienced people made a mental calculation. With so many of them, it is estimated that if they can hold on for at least ten minutes, if they still can't dig out, they may faint due to lack of oxygen and won't be able to get out in twenty minutes.

If so, he may die from lack of oxygen!

"I have a tank of compressed oxygen here. It was originally my own spare. Now we are grasshoppers on the same front. I contribute it!"

A tomb robber took out a small jar from his bag and said that. After that, he opened the jar completely. A hissing sound like air leakage appeared, and then people who were close to him soon felt that they could breathe easier.

few.

This is so-called compressed oxygen, not pure oxygen, because if you breathe pure oxygen, people will still be poisoned, so for so many people, evenly divided, everyone may only live four or five minutes longer!

But this dedication is good. If this person hides the oxygen bottle without taking it out, and when others can't hold on, he uses the breathing port to connect it. If he uses it by himself, he can get more oxygen.

Nearly half an hour to live!

And Yu Fei didn't care what these people were doing. He was still digging hard. He also felt that the humidity of the soil was getting higher and higher, which meant that it might really be close to the ground. This was water seeping from the ground!

But soon something happened that made them desperate. It was not close to the ground, but groundwater was dug out!

Yu Fei shoveled it down, and suddenly a spurt of water spurted out!

The tunnel they dug has not been reinforced. After a water leak occurs, it will easily collapse!
Chapter completed!