In the following night, not only Qin Yunfei didn't rest all night, but even the others didn't rest peacefully.

After all, the big war is imminent, and what awaits them may be an endless war, even the Dragon Monarch and the Demon Lord, two peerless powerhouses with the ability to penetrate the heavens, do not dare to guarantee that after this battle, they will be safe and sound.

It's just that they still have worries in their hearts.

However, when Qin Yunfei began to debug the sonar jammer, the two emperors' eyes lit up.

"It's ......"

"That's what I call sonar jammers. ”

Qin Yunfei took out the sonar amplifier, the size was only the size of a palm, it didn't take up space at all, and it looked very small.

And when Qin Yunfei turned on the switch again, a burst of overclocked sound waves were also released inside.

Although Qin Yunfei, Lin Feixue and the others couldn't hear it, as the three powerhouses of the Extreme Star Soul Cultivator, they were able to distinguish the special things in it.

After coming into contact with this kind of thing, they all showed shocked expressions.

"It's possible to make such beautiful music!" Long Jun's shock was beyond measure.

Even the Demon Lord fell for it, "Yes, only when you are at sea, you can occasionally hear this sound from dolphins." It turns out that people can make such beautiful sounds!"

Two emperors, you said something to me, which made Lin Feixue stunned, "Two sisters, does this thing make a sound, why can't I hear anything?"

Long Qi was also shocked by the sonar jammer designed by Qin Yunfei, but seeing that Lin Feixue was also depressed, she made a simple explanation.

"I was born on the sea, and it was only after I cultivated to reach the Soul Saint that I could feel this extraordinary voice, as if I cultivated to reach the Soul Saint realm, I couldn't hear it. ”

"What? When you hear this kind of voice, you have to cultivate to a certain level?"

Lin Feixue was stunned for a long time before she recovered her mood.

And Qin Yunfei on the side suddenly took out a sound wave detector at this time.

"Actually, we don't need to reach the Soul Saint realm, we can also achieve the desired purpose with this kind of thing. ”

As he spoke, Qin Yunfei aimed the sonar generator at the detector.

The pointer above quickly carved a stable line of wavy diagrams on the white paper.

The crowd was shocked again.

"Can it really be detected? It's just, what is this thing that you're detecting now? Is it the shape of this sound?" Long Qi was the most surprised, after all, her awareness of ultrasound was stronger than the rest of them.

But even then, she had never seen such a waveform.

In the face of everyone's doubts, Qin Yunfei did not rush to explain, but said a simple conversation to the detector.

When he output this dialogue, a line of strangely shaped bands was also depicted on the wave-measuring instrument.

When everyone saw it, they were shocked again.

"This one really detects voices, and this sonar is really singing? Oh my God! It's incredible!"

Those alchemists who followed Long Qi and were together with Qin Yunfei's research institute today were about to cry out with excitement at this time.

"It's amazing! It's amazing! It's something I've never been able to make in my lifetime!"

Everyone was so excited that they didn't know what to say, after all, this is something that subverts their thinking!

And Qin Yunfei put the new weapon in his hand and began to arrange a new task.

"This time, I made a total of twenty-one such things, and each fighter carried three on it. Tonight, we went to sneak up on their base camp and, remember, in the melee, threw things into the sea separately. Remember, every time you drop it, you have to be more than ten miles apart. You know what?"

Long Qi asked strangely, "Why does it have to be ten miles?"

"Because, if the diffraction of the wave is too close, there will be a weakening area, so that our sound wave output will be greatly reduced. ”

As he spoke, Qin Yunfei pointed to the fighters again.

"Also, I have installed magnetic sensors on the tail fins of all fighter planes, as long as you don't come into contact with those soul saint-level powerhouses within five miles, they will see you on the other side, and they won't find you. So, our mission tonight is more interesting. ”

Qin Yunfei pinched his chin and laughed.

Everyone was very strange about what he was laughing at like this.

However, after listening to Qin Feng's explanation, they were also very excited about tonight's sneak attack.

And just when everyone fantasized about the effect of the sneak attack, Qin Yunfei laughed again.

"Okay, for tonight's sneak attack mission, we're going to go and get some rest now. ”

As he spoke, he took his head and went to rest.

But Long Qique on the side said worriedly, "Let's go to rest, what if they come to sneak attack!"

Qin Yunfei shrugged his shoulders, "If you're afraid of their sneak attack, you don't have to rest, just go to the watchtower and watch it carefully, and see when they sneak attack?"

After that, Qin Yunfei waved his hand, then stopped paying attention to Long Qi and went back to rest by himself.

Seeing Qin Yunfei being so careless, Lin Feixue was also very surprised why he was so careless.

So, he appeased Long Qi first, and then followed Qin Yunfei and wanted to ask what was going on.

But as soon as she followed, Qin Yunfei stretched out his hand to stop her from asking.

"I know what you're asking, and there's a reason why I'm doing this. Yesterday during the day, we fought the first battle with the Fish-People, and we only used three fighters to defeat them, do you think, why didn't they do it yesterday?"

Seeing that Lin Feixue didn't reply, Qin Yunfei looked at the enemy's main ship over there.

"They won't come here to attack until they find out what we're doing. Tonight, however, it's hard to say. So, on the eve of the big war, we are absolutely safe. ”

After listening to Qin Yunfei's explanation, Lin Feixue was even more surprised.

"Since you know they're going to sneak up at night, why don't we take precautions?"

Qin Yunfei smiled bitterly, he pointed to the mighty mermaid army over there, "Have you ever seen eight people, fighting against millions of troops? Even if we all exist as one as ten thousand, but it is nearly ten million troops, and the chances of victory are very small." So what we need to do now is to break through, not defend!"

As he spoke, Qin Yunfei looked at the laboratory over there.

"I've already packed up the things that should be taken away, and after we sneak attack tonight, we'll go back to Xuanfengcheng! Make a stronghold there, at least you don't have to be here to be chased as a lost dog. ”

As he spoke, Qin Yunfei also showed a hint of bitterness, "Moreover, the average IQ level of the people in the East Island region is far inferior to that of the Longhua Empire, and if you want to plant a technology tree, this is the worst choice." And now, it is also controlled by the Fishman Ancestor......"

After saying his reasons, Qin Yunfei didn't want to talk any more nonsense, so he went back to rest by himself.

It's been a long time since he's slept well, and now what he needs is a good rest, and then he can fight those bastards who want hegemony!