While Zhou Xin explained his thoughts to everyone present, Atlas controlled the detector to the location where the light point first appeared. After a detailed investigation, she reported to Zhou Xin with a little disappointment: "Brother Captain, the probe scanned the seabed area around the location of the attacker, and found only ordinary rock structures and a small amount of seabed sediment, and did not find any artificial traces. It seems that they have been quite effective in camouflage around the entrances and exits. ”

"So there's no way to determine the location of the entrance and exit for the time being?" Zhou Xin was also a little disappointed.

"You can only delineate a rough range based on where the lights have appeared before."

"That's it—" Hearing this answer, Zhou Xin muttered to himself, "Since we can't find the entrance for the time being, then we can only wait for them to come back before we can go in with us." ”

"Brother Captain—I suggest you don't do this just yet." Atlas said with a hesitant tone.

"Why?"

"Scans deep below the seafloor show the presence of a large, regularly distributed electromagnetic shield about one to two meters below the rock layer. If the detector goes in like this, I'm afraid that the moment we enter the shield, we will lose contact with us. The little girl explained in detail.

Zhou Xin was surprised by such an answer, and after frowning and thinking for a while, he asked in an unwilling tone, "Is there no solution?" ”

"There's nothing good to do right now." Atlas said with a solemn expression, "People need time to study that shield in detail. ”

"I finally found the place where they were hiding, but I couldn't get in?" There was obvious frustration in Spred's words.

At this time, the detector in the picture has already turned on its own lights. But because the sediment stirred up by the attackers' activities has not yet settled, the probes surveying close to the seafloor are unable to capture a clear picture. Looking at the blurry picture on the screen, Zhou Xin frowned and thought for a while before saying, "However, the existence of the shielding layer at least shows that the following may be more than we thought before. We should at least have found the right one, there is a good chance that there is a clue hidden in it, and maybe even this is the control center we have been looking for. ”

"Even if there are so many clues hidden in it, what's the use of not being able to get in, it's not that you can't know anything." Dart spoke ruthlessly about the awkward situation they were facing.

As soon as he finished speaking, Atlas's voice rang out, "They're back." With this sound, the image on the screen went black again. But it didn't take long for a corner of the frame to light up, and after a while, a few dots of light appeared at the edge of the lens, and then they slowly moved towards the center of the frame. Towards the halfway point, all the points of light stopped.

Under the cover of sediment, this was the first time that the probe had observed those attackers at such a close range. But also due to the obscuration of sediment, Zhou Xin and the others can still only see each other's silhouettes in the picture, but they are much larger than before.

However, no one looked at the shadows of the attackers now, because at this time, there was suddenly an unusual light next to those points of light. Unlike the point light source on the attacker, the new light source is a short line. Over time, the short-term line continues to brighten and thicken. In less than a minute, the original short line turned into a horizontal glowing rectangle.

At the same time as the glowing short line appeared, Atlas reminded: "Brother Captain, the entrance and exit have been opened, what should we do next?" ”

"Let's wait for a moment." Zhou Xin stared at the screen and commanded.

Then, when the rectangular light source in the picture no longer continues to change, the light points that had been staying nearby move again, and they are driving towards the inside of the rectangular light source one by one. Looking at the other party's actions, Zhou Xin opened his mouth and asked, "Can you photograph the situation inside?" ”

"No, the sediment is too disturbing to the picture, and the light is seriously insufficient." The little girl on the screen shook her head, "This is already the clearest picture that people have gotten after dealing with it." ”

"Why don't you come closer?" Dart asked.

"It's already the closest, and if you continue to get closer, you'll enter the range of the other party's electromagnetic shield."

As he spoke, the last attacker also entered the range of the rectangular light source. After about half a minute, the height of the rectangular light source began to slowly decrease.

"Brother Captain, the entrance and exit are about to close, do you want our probe to follow in." Although the proposal had been made before, Atlas still reminded it at this time.

Looking at the rectangular light source in the picture, which gradually became smaller, Zhou Xin showed a hesitant look on his face. After thinking back to what the little girl had reported before, he finally shook his head, "Don't go in yet, wait until you find out the situation." Just as Zhou Xin made his decision, the last ray of light in the lens also disappeared.

"Time waits for no one." Staring at the pitch-black screen, Zhou Xin ordered, "We must find a way to break through the shield as soon as possible." ”

However, for this matter, Zhou Xin still thought too simply. Now, three days have passed since they found the entrance to the attacker's first hiding place, and the nearby probes have taken the opportunity to find several more entrances and exits. At the same time, they also discovered in a very unexpected way that there was not only a crescent-shaped protrusion. There are several similarly shaped protrusions around the crescent-shaped protrusion that was first discovered, each of which is not exactly the same size. In the locations of the other protrusions, the probe also found several entrances and exits. However, during the same three days, compared with the smooth progress of the detector, Atlas's research on the shield appeared to be a little stagnant.

"Brother Captain, they have tried all the frequencies that can be used, but they have not found the frequencies that can penetrate the shield." On this day, Atlas said irritably to Zhou Xin, "It stands to reason that in order to ensure that you can communicate with the outside world, even the shield of the full frequency band should allow a certain band of radio waves to pass through." But this is not the case with that shield, which is like an iron plate that blocks all the radio waves in all frequency bands. ”

"Since we can't find it ourselves, have you tried to start with each other?" After thinking about it, Zhou Xin asked, "When they communicate with each other, which frequency band of signal ...... do they use?" ”