Fifteen kilometers is not too close for the crowd, but it is not too far, because in order to prevent the danger of possible zài, the speed of the crowd is not fast, and it will be an hour before they reach the next station.

The layout of the second station is exactly the same as the previous one, so it can be said that there is no difference in sight. There was still no storage of the photon train, and the passage to continue forward was also blocked by the landslide.

"Now it's certain that this is a massive underground base. There is no record at all on the Celestial Dragon Star!" Yan Xinjie sighed.

"Judging by the style here, the last trimming should have been decades ago. This kind of photon train track, which needs to affirm the photon orbit generator, must have been eliminated forty years ago!" Xing Xin looked at the photon orbit generator laid on the ground.

Today's photon trains come with photon track generators, don't look at the photon train according to the prescribed route, if necessary, in fact, it can run anywhere. The route is only set for the convenience of management.

"Chances are, the style here is indeed a bit old!" Nangong Lie nodded.

With the development of human beings today, there will be a relatively large replacement in about five years, and what was a few decades ago is indeed quite old for today's human beings. This is still Draco, because of the conservative thinking of the Orientals, it is somewhat better. If it's in a place like the Central Star Sector, it's normal for it to change every year.

"Is it possible that this place was abandoned because of the landslide?" said Selene.

"An underground base of this structure, if not in the event of a violent invasion, or a strong earthquake. That's unlikely to be a landslide. Draco has not had a strong earthquake in nearly a hundred years. The most recent earthquake near the Polan continent was 10 years ago. However, the magnitude of the earthquake was only five. It's impossible to have such an impact here!" Xing Xin shook his head.

"Don't think about it. Here is an attack. Look, there's a sign of a battle!" Bolgar found some traces.

The crowd gathered around to look, and sure enough, they saw traces of the attack. And interestingly, a large number of traces are physical bullets, and Pierce also found several physical shells.

"I'll go, what an old weapon!" Pierce picked up a physical bullet case and looked at it carefully, "This is XSD971 physical bullet, caliber 15 mm, didn't this thing have been installed more than 2,000 years ago?"

Kinetic weapons for a variety of reasons. Although it has not completely withdrawn from the stage of history, it is no longer reused. Nowadays, most of the kinetic weapons of human beings are used in the battle against insects, especially in the defense of the city, without considering the problem of carrying, and the use of super-large caliber ammunition. And individual weapons are basically no longer visible kinetic weapons.

"It can't be that the troops of 2,000 years ago have traveled to the present and started a war!" Pierce said amusedly.

Saying unintentionally, the listener was intentional, Xiao Ming's eyes flashed, and he thought of a possibility.

"Xiao Ming, is it ......" Tifa also thought of it and asked in a low voice.

"I don't know. Maybe it's possible. But it doesn't make sense! It's too unlikely. Xiao Ming shook his head.

If the Queen of Time did it, then there is really no need for her to pull the people of 2,000 years ago to the present. Because her longest point in time was also in Maria's time. How could it have been 2,000 years ago? But if it weren't for the Queen of Time, where did such an ancient weapon, which can only be found in museums, come from?

It is not easy to find someone who can use such an ancient weapon. A real battlefield weapon is not something that can be picked up and shot. Especially if you are used to energy weapons that have no recoil, and suddenly get a kinetic weapon with recoil, maybe you can't hit a target as big as an elephant. Although this situation can be solved by a lot of training, it is better to use more energy weapons at that time.

"Wait, could it be related to the magic light wave?" Zhuge Tian had a flash of inspiration: "On the surface, we can't understand why someone would use such a primitive weapon, but if we add the influence of the magic light wave, it makes sense." You have forgotten that there is a technology to induce magic light waves on the side of the sect. If the forces that came to attack the underground base also had such technology, then it would make sense for them to use this primitive weapon. When the magic light wave sweeps, all the energy equipment will be paralyzed, but the kinetic energy weapon will not be affected at all!"

"Yes, that makes sense. That would explain why the attacker would come up with such a thing. Feng Daopei nodded, thinking that Zhuge Tiantian's speculation was very reasonable.

"What the hell are you talking about?" asked Yan Xinjie confusedly. Several other people also looked over, also at a loss.

Feng Daopei thought for a moment, and then explained the nature of the magic light wave.

"Is that the one just now? I thought it was a special attack, but it turned out to be a natural phenomenon?"

"No, it's not a natural phenomenon, but we don't know exactly what it is. We don't know much about the Magic Light Wave now. I just know that this thing is very powerful. This time, the magic light wave is different from the level we encountered at the beginning, and the influence range is small, but around Zhubu Island, the magic light wave we encountered at the beginning directly affected a starry sky!"

"Let's not talk about the magic light wave. Nangong Lie said: "Since this underground base has been attacked, is there still a need to explore?"

"Absolutely. Those men in black may be guarding this underground base. Otherwise, it would not have been possible to appear at that point in time. What a coincidence!" Feng Dao said.

"I also agree with Captain Feng, we should continue the search!" said Polgar.

Although the passage had collapsed, it was not difficult for everyone, and Nangong Lie let one of his subordinates with earth-based abilities make a passage that could pass through guò, and everyone continued to move down.

After this station, the passage begins to turn sharply, and the slope becomes steep, but after three kilometers, it has already descended a thousand meters.

"If we continue like this, we will reach the center of the earth!" Zhuge muttered every day.

"The thickness of the Earth's crust on Draco can reach an average of 47 kilometers. Even if we are at the bottom of the sea, this thickness will not be less than twenty-five thousand meters, and our current landlords who are less than three thousand meters under the sea, you are thinking too much!"

"Haha, it's just not good to study every day! The squad leader taught him a lesson!"

"Alright. Ilti, do you know what the earth's crust is?What is the mantle under the earth's crust?What is under the mantle?" Zhuge Tiantian cast a disdainful glance at this violent woman with the worst academic performance in the whole team.

"Yes, yes, I don't know!" Ilti snorted proudly.

Everyone laughed dumbly. These two guys will quarrel when they meet, and everyone has long been used to it.

Finally, the passage ended, and the group came to the last station.

At this time, the distance from the bottom of the sea was already 4,700 meters.

In other words, they have already penetrated 5,400 meters below sea level.

"Although we are far from the center of the earth, this depth is still a little exaggerated!" Zhuge looked at the depth readings on the light brain every day.

"Do you think it's strange?" said Tifa suddenly, "At such a depth, we didn't feel any turbidity in the air. So this base has been abandoned, it shouldn't be like this!"

The crowd reacted.

"Yes, this shows that this underground base is still operating, at least the air replacement is working normally!" Yan Xinjie said.

"This is tantamount to proving the position of those men in black!" Xing Xin said: "It seems that they are most likely guarding this underground base." ”

"Then when we go down, there is a great possibility of another attack. You must be careful!" Feng Dao said.

Everyone nodded, adjusting their initial relaxation.

Soon everyone found the exit, left the station, and walked all the way, not more than a few hundred meters, before they came to a gate, and it was foreseeable that when they opened this gate, they would officially enter the underground base.

The door opened, revealing a quiet but lit underground base. A qiē layout is very ordinary, ordinary like an office building that can be seen everywhere, the location of everyone should be a large exit located in the north corner, enter from the big exit, fifty meters later is a huge hall, there are ten side-by-side elevators in the east corner of the hall, the west corner is a row of counters, I don't know what business was done before, there can be a guard hall in the south corner, and dozens of machines have long been shut down.

"This machine is really a product of decades ago. You see, this production date is actually 2767, that is, forty-seven years ago!" said Pierce as he stepped forward to open one of the machine's maintenance items, pointing to the steel seal inside.

"It seems that this base has been abandoned since it was invaded more than forty years ago. At least they have lost their original use function, and those men in black may have been the invaders of the past, and now the dove occupies the magpie's nest. It is also possible that the base personnel held the base, but abandoned the place, leaving only a group of left-behind personnel!" Xing Xin analyzed.

"I'm more inclined to the first point, if it's the second point, it seems to make some sense!" Nangong Lie said.

Indeed, if you normally block the enemy's attack, then there is no need to abandon such a large underground base. This underground base, which is thousands of meters underground, cannot be built overnight.

"Maybe there was something special that made them have to give up. For example, this is a highly classified place, and if someone finds out, even if it is kept, it will have to be abandoned!" Polgar said.

"That makes sense, let's move on. But this place is so big, wouldn't it be faster for us to search separately?" (To be continued......)