The control center of the Cliff Mountain base is very simple, only the control of ordinary living facilities, as well as monitoring equipment, and there is a base defense system on the second floor. But here it is different, with the addition of navigation and coordinate azimuth movement on the main control panel, as well as the existing energy.

In the sailing option, there is a speed scale, with the lowest speed being 0.1 times the speed of light and the highest being the speed of light. It's just that the scale after 0.1 is gray.

Yang Dongqing was very surprised, this war fortress was able to fly at the speed of light, and its technological civilization far exceeded the existing technological level of the Yuhe Galaxy.

There are dozens of options below the coordinate movement direction, which are marked in various directions, and each direction is divided into straight lines, curves, arcs, and various angles, which is quite complex.

The last energy bar is marked with 100 percent. This made Yang Dongqing even more surprised. He had seen with his own eyes the wreckage of the ships that surrounded the fortress in the underworld, and it was clear that there had been a great war. In other words, the energy of the fortress must have been lost, but the energy now marked is 100%.

And what surprised Yang Dongqing the most was that this fortress did not use graphics and colors as illustrations like the base of Cliff Mountain, it used all words, and it was federal script.

"I don't know how long this fortress has existed, how can it use the words of the Federation?" Yang Dongqing was confused.

Putting down the doubts in his heart, Yang Dongqing began to study the interface, although it has more functions than the base, but if there is no weapon system, this is a cargo spaceship. The first thing he had to do now was open the second floor.

Opening the structural diagram of the base on the main control board, Yang Dongqing found a difference. The first three floors of this fortress are exactly the same as the base, but there is an extra fourth. This immediately reminded him of the hall where the Thorn Ball was when he activated the fort.

"The fourth layer may be the energy and engine of the fortress!" Yang Dongqing said secretly in his heart, he wondered if the base of Cliff Mountain also had a fourth layer, otherwise why he couldn't find the source of the base's energy.

Yang Dongqing continued to look at the structural drawing, and soon found the "lock" logo on the second and third floors, as well as the fourth floor. From these three locks, there are three red lines all the way down, connecting to the bottom of the structural diagram.

"At the bottom, there's that hall, can you unlock it from there?" Yang Dongqing originally thought that if he couldn't unlock it, he would go back and let the AI do the job, but now that he found a new way to unlock it, he immediately turned around and walked out.

Coming out of the gate, Yang Dongqing flew down. But when he reached the bottom, he was shocked again. The fortress did not land, but was suspended in mid-air, about thirty meters above the ground.

"Anti-gravity, it's a matter of space. A thought flashed through his mind, and he immediately vetoed the possibility of space causing the fortress to levitate, which required a lot of energy, and the fairy would never do that.

"It looks like it's anti-gravity, and it's self-starting. Otherwise, with such a large weight, once it hits the ground, the lower half will sink into the ground. Yang Dongqing thought in his heart, looking up from the chassis, and found the open gate about thirty meters away.

"The door is still open. Yang Dongqing exhaled, just now he was worried that the door was closed.

When I entered the gate, I saw the cyan giant wolf standing in the starry sky on the big screen, looking up, extremely handsome.

After a few glances, Yang Dongqing quickly came to the pile-like platform, came out of the mecha, and then put his hand on it, and released his energy outward.

He still used the method of three-layer detection at the base of Cliff Mountain, hoping to find something.

After a while, Yang Dongqing's eyes lit up, his eyebrows raised, and his right index finger snapped on the edge of the front.

There was a soft click, and the front of the platform cracked in the middle, revealing a panel in front of it. This panel is covered with dense lines like integrated circuit buses, spreading in all directions. In the middle position, is an empty groove.

"It's a groove again!" Yang Dongqing stared at the middle of the panel, frowning slightly. This groove is not hexagonal, but resembles an elongated oval.

"Colorful crystals!" his mind suddenly thought of the colorful crystals in the box, the shape was too similar.

"It can't be such a coincidence, right?The colorful crystal is used here......" Thinking to himself, Yang Dongqing immediately turned around and flew out of the door, returned to the hall and took the box and came back.

Opening the box with a hexagonal crystal, Yang Dongqing took out a colorful crystal.

"Boom~" The space shook again, but only for a moment, and immediately returned to calm.

Yang Dongqing frowned slightly, feeling quite puzzled, could it be that the colorful crystals are still connected with space?

With a stomach full of questions, Yang Dongqing put the crystal into the groove. There was a snap, and it was tightly closed.

Immediately after, with a buzzing sound, Yang Dongqing heard a high-speed rotating beep, and the extremely high frequency shook his head to swell.

"It's really used here!" Yang Dongqing was stunned, even more puzzled by Huangquan and the black market network's actions. Colorful crystals are used in war fortresses, why do they value crystals far more than fortresses, and even use fortresses to attract Emperor Dali?

Also, judging from the star-rated weapons prepared by the black market network, it is obvious that they also know that there is that thorn ball inside the war fortress. Yang Dongqing didn't think of this problem before, but now that he thinks about it, how did the black market network know?

"Colorful crystals can be used for more than just fortresses, they must be more important to them. Otherwise, there is no way to explain what Huangquan and the black market network did. Yang Dongqing finally came to a conclusion.

The panel receded, the platform returned to its original state, and the beep gradually subsided. Yang Dongqing flew out with the remaining two boxes of colorful crystals and flew back onto the first floor of the fortress.

When he came to the control platform, he saw that the lock button between each layer on the structure diagram had become unlocked. He stretched out his hand and gently touched the position on the second floor, and with a smack five meters behind him, a three-meter square hole was opened.

"It's done!" Yang Dongqing returned to the main page, and was surprised to find that the speed of light multiples below the voyage were all lit up.

Yang Dongqing didn't study much, turned around and walked to the entrance of the cave, and when he saw that there were steps, he immediately walked down.

It was just over thirty meters, and Yang Dongqing reached the second layer. When his feet landed, he saw the missiles that were neatly arranged and densely packed. Each one is more than 20 meters long and completely pitch black. At a glance, there is almost no end in sight.

"It's such an old-fashioned weapon?" Yang Dongqing was a little stunned, the fortress is so advanced that it can reach the speed of light, and the missiles that appear here are extremely contrasting, which is completely unimaginable.

After a while, Yang Dongqing exhaled and walked quickly to the console...... When he saw the contents of the control panel, his eyes suddenly widened and his mouth opened wide.