With so many mounds of earth, it is not possible to dig through them immediately, but fortunately, Zhang Yun does not want to take advantage of the time when the other party reloads the bomb to dig out a space that can accommodate a person to pass through.

Therefore, under the continuous digging and pushing, in less than two seconds, a hollow hole with a large head appeared in front of him. Seeing this, Zhang Yun didn't dare to hesitate for even a second, and immediately another piece of C4 came out of his hand.

With a loud bang, about a hundred meters in front of the mound, there was immediately another wave of shaking!

Immediately after that, the opponent's heavy machine gun rang out again.

But this time, although Zhang Yun heard the roar of the heavy machine gun, there was also a popping sound from the mound in front of him. But no stray bullets resurfaced.

"Haha...... Lao Tzu knew it would work. Zhang Yun, who was laughing wildly, has not forgotten what the most important thing is at present!

Therefore, he immediately endured the severe pain in his body and started to work as a coolie, and it didn't take long for Zhang Yun to leave behind the mound of soil produced by the first explosion. Began to crawl towards the second mound a hundred meters away......

In this way, relying on this trick, the six levels that the old devil explained were in a few minutes. was broken through five of them by Zhang Yun and came to the last gate.

Zhang Yun, who was in an excited mood, was about to repeat his old trick, but unexpectedly, a series of loud noises suddenly came from the other side of the mound!

Zhang Yun's mood sank to the bottom in an instant, but he still didn't believe that the devils had such a ruthless heart......

You must know that there are definitely their own people alive in this passage!

Therefore, Zhang Yun, who was unwilling to accept his fate like this, gritted his teeth and began to wave the sapper shovel wildly, and even waved the sapper shovel into a phantom!

It's just a pity that when Zhang Yun excavated according to the experience of the previous four times. After digging through the earthen wall of more than two meters, he found that there was still an earthen wall in front of him, and Zhang Yun, who confirmed his guess, immediately sat down on the ground.

I was in a daze for a while, and I don't know how long time has passed.

Zhang Yun, who had been in a dead heart before, seemed to remember something again, and an oxygen tank instantly appeared in his hand......

"Fortunately, fortunately, in order to prevent the devil from using poison gas bombs, this oxygen tank has also prepared a few."

Zhang Yun, who had a glimmer of hope in his heart, seemed to have given birth to infinite strength, and began to wave the sapper shovel to continue to attack the seemingly endless mound!

"Boom!"

Zhang Yun, who was digging hard, was awakened by the sound of a landslide in the rear. Looking back, there are mounds of dirt in front of you, left and right. Immediately, a sense of depression arose in my heart.

After taking a breath and forcing himself to calm down, Zhang Yun thought of the end of the earthwork, and there must be a lot of military police waiting for him.

Maybe at the end of the passage there is already an excavator working at the end of the passage. The devils who have thought of themselves as dead. For the sake of this biochemical weapons arsenal, this passage will definitely not be abandoned like this.

Even if they didn't find an excavator, there was a large number of military police at the exit a few hundred meters ahead.

When the thought turned to this, Zhang Yun immediately gave up and continued to move forward, even if he dug a few hundred meters of floating soil, he would be able to escape, and he would not hesitate!

Instead, he began to dig upwards, towards a building in his memory......

"Ahh This hard man is harder to dig than floating soil. Spit out the floating dust in his mouth, Zhang Yun couldn't help but complain.

After settling his body with his hands and feet, he looked down at the small hole that kept falling into the floating soil, and Zhang Yun, who was a little dizzy, couldn't estimate how high he had dug up......

In this situation, the front and back are dirt on the left and right. Zhang Yun has even lost the concept of up and down.

Therefore, Zhang Yun was a little dumbfounded, because of this act of digging and stealing holes, he was not a good player, just a layman. If it weren't for the great power. If you can fill in the excavated soil underneath and press it tightly, you may not be able to dig it up.

"Hey! If only there was a grave robber here......"

Suddenly thinking of the tomb robbers, Zhang Yun couldn't help but regret it in his heart!

Knowing that this time he might have to work underground, he didn't consult the professionals who robbed the tombs. He ran over in a hurry.

You must know that those birdmen can dig a thief hole directly on the surface and go to the existence above the head of someone's coffin.

And they don't have to transport much floating soil out, it's like rats, you know, they don't have their own huge power, they can shoot the already hard soil layer harder, so as to fight for space......

If I had that kind of burrowing skill, I'm afraid I wouldn't be so hard now!

It's a pity that there is no regret medicine in this world, so after thinking about it for a while, Zhang Yun had to withdraw his divergent thoughts and continue to face the facts.

And this fact is that I have definitely deviated from the place of origin in my mind. Because according to the calculation of time, if it was a vertical digging, I would have already gone out......

That's a terrible thing!

Something so big has happened, and who knows how many military police are waiting for him on the surface?

Just digging out indiscriminately, not reaching the unearthed place in his mind, but burrowing under the street, isn't it self-defeating?

What's more, although those devils may think that they have hung up as an intruder and will not specifically search for themselves, they will definitely call in the life detection radar. Do the signs of life that are used to detect their own people still exist? to facilitate rescue work......

Suddenly thinking of this stubble, Zhang Yun felt a thrill in his heart. The mood that was a little slack before was immediately full of passion again!

The situation has reached this point, and the only way out is to dig it up as soon as possible, otherwise it will pass with time. The devils are well prepared. The life detection radar is also in place, and it is definitely going to be a tragedy yourself!

What the? 20 meters above the ground, there are still signs of life?

If such a situation is exposed to the life detection radar, it is self-evident what the consequences will be for oneself......

Next, because he didn't know how far away from the ground was, Zhang Yun was digging quickly on one side, but always kept a little careful on the other side, stopping the excavation action from time to time to listen to the movement above.

And this caution finally saved Zhang Yun once, when Zhang Yun stopped digging again, ready to listen to the movement above, the most impressive thing was that there was an abnormal sound from the soil layer above his head.

Zhang Yun, who was psychologically shadowed by the collapse, was immediately frightened!

If you are pressed by the collapsed soil layer again, even if you are not injured, you can't guarantee that you will be able to dig up again with such a mental spirit.

In a hurry, Zhang Yun immediately began to dig to the side......