Therefore, when Tang Wulin was slowly advancing underground, he was not discovered by the various detection instruments of the Northern Naval Regiment. The pen, fun, and pavilion www.biquge.info on the seismograph, showing only the normal fluctuations under the ground. The activity of one person is far from enough for a seismograph to sound an alarm.

In this way, Tang Wulin rested for a while when he was tired, and continued to dig when he recovered. Even he didn't know how long he had been digging.

During this period, he returned to the ground to rest twice, and when he was really hungry, he returned to the sea, hunted a sea soul beast, and cut the sea soul beast into sashimi for food with the help of the golden dragon claws. After regaining some strength, he returned to his underground world to continue digging.

"Ding-" A crisp sound suddenly appeared, and Tang Wulin's movements suddenly stopped. The cold hairs on the whole body stood up, and the whole person quickly converged and breathed.

What's the situation?

Not daring to release the light brought by the Blue Silver Grass, Tang Wulin could only release his Qi and Blood Soul Ring, and under the illumination of the golden aura, he was surprised to see that at the end of the passage he had dug, a metal plate blocked the way.

Is this an inside the Northern Naval Regiment? Is it an underground fortification or is it isolated from the outside world?

Tang Wulin gently pressed his palm against the metal plate and felt it silently.

He was already a forging master close to the level of a saint craftsman, and his familiarity with metal was far beyond that of ordinary people. Just by touching and mental perception, the properties of a metal can be basically determined.

That's what he did now, and soon he could discern that what was in front of him was a kind of closeness, not particularly rare. But it's very sturdy. It is a type of titanium alloy.

There are no energy fluctuations in it, which means that this is not a large soul guide, just a pure alloy.

This made Tang Wulin much more relieved, if it was a soul guide, then he would be in trouble, at least he had to find a way to continue down and bypass this metal wall. But if it is just a simple metal wall, it means that he is more likely to have entered the outer layer of the underground fortifications of the Northern Naval Regiment. As long as you break through this metal wall, you will be able to enter the interior of the Northern Naval Regiment.

His heartbeat accelerated slightly, and after Tang Wulin thought for a moment, he slowly stretched out a finger, and the dark golden light blade slowly drilled out from the fingertip, and then silently pierced into the rare metal in front of him.

No matter how tough a rare metal is, can it compare to his dark gold dreadclaw?After the sharp blade pierced, it slowly rotated under Tang Wulin's control, and soon drilled a hole.

A faint light quietly released in front of the Dark Gold Dreadclaw, extending farther away. After a while, Tang Wulin felt a light touch on his fingertips, and he knew that he had drilled through.

Quietly retracting his fingers, he couldn't help but be shocked.

The metal walls were two feet thick. With such a heavy alloy wall, the defense power is definitely super strong, and the cost is extremely high. The Northern Navy Regiment is really willing to spend blood!

A faint light came through the small hole. I don't know why, when he saw this light, Tang Wulin felt like he was in tears. Ever since he landed on Devil's Island, he has been living an inhuman life. I can finally see some popularity.

Don't look at it as just a small hole, with this small hole, Tang Wulin's spiritual power in the Spirit Abyss Realm can slowly enter along the small hole, silently perceiving the internal situation.

As he judged, this was indeed the underground fortification of the Northern Naval Regiment, and to his surprise, it was still a huge warehouse. The warehouse is full of various soul guide weapons and equipment, and the most of them are the custom-built soul guide shells. There is no doubt that Tang Wulin inadvertently entered the most important storage warehouse of the Northern Sea Regiment. No wonder the exterior alloy is so heavy.

The biggest advantage of the warehouse is that there is no one, and the biggest disadvantage is that the defense outside such an important warehouse must be super strong.

What should I do?

Anyway, let's go in first. If you can't do it, you can go back the way you came. You can advance or retreat. Let's see if there's a chance to get out of this warehouse.

Thinking of this, Tang Wulin thought for a while, and set the exit in a dark corner on the north side of the shelf, close to the ground. This location is the least likely to be spotted.

With the cutting of the dark gold dreadclaw, it didn't take long for a square piece of metal to be slowly cut out, in order to be as low-key as possible, he just cut out a small exit one foot square, with his figure, it was really a bit difficult to drill out.

The fresh air made Tang Wulin's chest widen, and he almost moaned out in comfort. Quietly drill out of the hole and reseal the metal cover, which is impossible to find unless you look very closely.

Suddenly, a sense of fear rose from the bottom of his heart, Tang Wulin's whole body stiffened, and he hurriedly leaned against the wall and didn't dare to move.

But he soon knew where the fear came from, from the shelves in front of him with skull markings. On the shelves, there are a number of custom-made soul guide shells.

There is a lot of knowledge about custom-installed soul guide shells, Tang Wulin has also learned a lot in the academy, after all, this is the most terrifying weapon of mankind in 10,000 years. It is said that the most powerful fixed-mounted soul guide cannonball, even Extreme Douluo would not dare to touch it. You can see its power.

In terms of volume and identification, these fixed-mounted soul guide shells in front of them are mainly between the fourth and sixth levels. This is already the most powerful custom-mounted soul guide projectile that a normal fighter can carry. More powerful shells that require super mechs to carry for safety.

Tang Wulin did not move, but quietly released his spiritual power to feel the situation in this warehouse.

Through the feedback of spiritual power, he quickly judged that this was a warehouse of about 3,000 square meters, and more than 50% of the stored in it were custom-installed soul guide shells. If so many shells explode, I'm afraid that the entire base of the Northern Navy Regiment could be lifted off.

In addition, there are some mecha reserves, all of which are standard yellow-level mechas.

To be precise, this warehouse is stocked with quite powerful strategic materials, but it is not the top one, at least there are no fixed-mounted soul guide shells above level 7 and higher-level mechas.

There are security cameras in the warehouse, but only in the most critical locations. In this way, it means that Tang Wulin is not so easy to be discovered, as long as he is careful.

There's still a chance!

The spiritual power can't get out of the warehouse, and the surrounding metal is too thick, so Tang Wulin doesn't know what the situation is outside.

After carefully remembering the location of all the cameras, Tang Wulin began to move quietly, and he had to leave his entrance first. In this case, even if he is discovered, at least the entrance is not so easy to find, and there is still a chance to get out later.

The only thing to be thankful for is that it is impossible for this kind of warehouse to store the fixed soul guide shells to have an attack system, otherwise, once the attack system launches an attack and detonates the fixed soul guide shells, it will be a devastating disaster.

I looked down the wall. This warehouse is very well sealed, and the air, humidity and temperature are controlled within a certain range. What should we do? I can't get out of here! There must be a strong defense force outside. Without an internal pass, even if you can break out of the gate, you will be discovered immediately. This is the Northern Navy Regiment, although Tang Wulin is a one-word fighting armor master, he doesn't think that he can break out so hard with his own strength.

Just as he pondered whether he should dig the tunnel again and find another exit.

Suddenly, with a series of electronic sounds, the heavy door of the warehouse slowly opened.

Someone's coming?

Tang Wulin hurriedly hid in the corner.

Sure enough, after the door opened, several people walked in from the outside.

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