There are nine buttons on the screen, the first is an energy shield, the second is a high-energy laser cannon, the third is a missile, and the fourth is a ...... The antimatter cannon (4) and the five buttons on the back are all gray and have no writing.

Seeing these buttons, Yang Dongqing was stunned, just the first energy shield had far exceeded his expectations. Compared with the defense system full of guns in the base, this energy shield is much more high-end, and no force in the entire Yuhe galaxy has developed an energy shield.

Compared to the first button, the second high-energy laser cannon is much more ordinary, and is usually equipped with large warships. However, it is conceivable that this high-energy laser cannon must be similar to the base, and the thirty-kilometer diameter spacecraft is covered with dense cannon ports, which makes people's scalps tingle just thinking about it.

As for the third button, Yang Dongqing automatically skipped it, he didn't know why the fortress was using this weapon, the flight speed was too slow, even if it was a nuclear warhead, the power was equivalent to nothing.

And the fourth button, more shocking than the first energy shield. There are all the big forces in the antimatter Jade River galaxy, but they have only heard of antimatter bombs, but they have never heard of antimatter cannons. Antimatter needs to be constrained by electromagnetic fields, how can it be fired? cannonballs? rely on kinetic energy...... He couldn't figure it out.

"There are only four antimatter cannons, which is a little less. Yang Dongqing exhaled, recovered from the shock, and muttered.

"There are five buttons in the back, and I don't know what kind of weapon they are. Yang Dongqing was a little strange, obviously the energy reserve was 100%, why couldn't these buttons light up, and there was not even handwriting.

After a moment of silence, Yang Dongqing resisted the urge to click on the button, and turned around and walked to the side where the missile was placed.

He wasn't going to see the missiles, he was going to the third floor, and the entrance to the third floor was over there.

Quickly descending to the third floor, Yang Dongqing was stunned again, at first he thought that it would be the same as the third floor of the base, it was a zigzag passage. But it's actually a huge space, surrounded by a wall, about fifty meters high, and in the middle of this space is the console.

Yang Dongqing glanced around, walked quickly to the console, and saw that there was a circular ring on the screen, connecting eight areas respectively. And four of these eight areas are lit, which are written missile area, battleship area, protection area, and maintenance area. The other four areas are all gray, similar to the second layer, and again without any writing.

Staring at this picture, Yang Dongqing's breathing was a little short, and this so-called area was clearly a manufacturing factory from the map. The small print in each area is marked to each workshop and link, which is very clear.

"Good fellow, this third floor is actually a military factory...... If four are bright, it means that these four factories can be opened. I don't know what the other four areas are?" Yang Dongqing thought, a little in the position of the battleship, there was a click, and a huge door opened in the wall in front of him.

"Looks like my location is the ring on the map. Yang Dongqing left the console and walked into the door.

Behind the gate was a huge area, Yang Dongqing walked forward according to the pattern of his memory, and soon found a factory building with many large machinery placed in it. None of these machines he had ever seen before, and they were completely different from what he had seen when he was studying at a military school.

"There shouldn't be a lot of big warships built here, this military factory is built for small warships. Yang Dongqing thought as he walked forward. Soon passed through the area and came to a large gate.

The door is closed, with a control switch on the right side and a green light on the buttons.

Yang Dongqing stood in front of the door and stopped for a moment, did not try to open the door, but turned around and walked back. The opening of the door should be in the main control center. In addition, he didn't want to continue to explore, the huge area couldn't be completed in a few days, so he would talk about it after he went back.

Turning back to the middle area, he didn't look at the other three factories, but rummaged through the screen. Soon he found the fingerprint and iris entry system on it, and entered it without hesitation, and positioned himself as the highest.

After doing this, Yang Dongqing was a little strange that he was able to formulate a level. It was as if the people in this fortress had emptied all the records when they left.

Returning to the main page, Yang Dongqing opened the entrance to the fourth floor, just behind the console.

"The thickness of the fortress reached ten kilometers, and the thickness of the upper three layers was just over a hundred meters, that is to say, the thickness of the fourth layer reached nine thousand nine hundred meters. Yang Dongqing couldn't help but secretly speak, the fourth layer does not need to ask about the energy reserves, the ecological circulation system, and the location of the engine. And these three areas stand 99% of the fortresses, which is really an exaggeration. He had been wondering how much energy could withstand the consumption of the fortress's weapons, but now he finally understood.

"It's no wonder that the Cliff Mountain base has not used up its energy consumption for so long, if there is also a fourth layer like this, it makes sense. Yang Dongqing thought to himself and walked down from the entrance.

Descending the steps, only about twenty meters, Yang Dongqing's eyes suddenly opened up, around him were huge metal columns, leading to the bottom, he seemed to be in a huge metal jungle, every time the steps went down, there would be a passage stretching horizontally, there was no regularity to follow.

Further down, about a thousand meters, he entered the closed area again, with walls on both sides of the steps, and occasional horizontal passages, which Yang Dongqing didn't pay attention to. Continue to walk down, and walking here, he actually faintly felt the energy fluctuation.

The situation was almost the same in the back, Yang Dongqing also walked faster and faster, and finally simply jumped and ran.

About half an hour later, at the end of the stairs, a metal door appeared. Yang Dongqing walked closer, put his finger on the control switch, and with a dripping sound, the door slowly opened.

"That's true!" Seeing the outside environment, Yang Dongqing smiled, and in front of him was the lowest hall. The door opened on the side, and in front of him was the platform, and on the right was the gate still open, and outside was the moor.

"It seems that the opening of this fortress is still not complete, and many of the buttons are gray!" Yang Dongqing walked out, and after coming to the gate, he turned his head to look at the cyan giant wolf on the screen, raised his hand and clicked on the gate switch, and jumped out.

Although there were still many places to go to the fortress and some questions that he had not figured out, he did not want to look at it again. The combat effectiveness of the fortress has been determined, and this is enough, and it is not too late for the rest of the people who don't understand to go back and study slowly, Zhou Ziluo is waiting for him to go back soon.

However, as soon as he crossed the hill, Yang Dongqing let out a surprised cry and looked at the riverbank.