Tianxuan and Gu Sas talked happily, from astronomy and geography to humanities and society, almost everything. And after Tengen told him how to get to Maya's adventures, Gusas became interested in the young man, felt that his coming to this world was not accidental, and wanted to study him.

However, it is a pity that it is now an eventful season, and Gu Sas can't keep it, so he can only send it out of Lanmian City as soon as possible, and he made an appointment with Tianxuan that once the matter is over, he will return here to continue the long talk. So, Wusas had no choice but to reluctantly help them pack up.

"Where are you going next?" Gusas asked.

"Back to Brenthal!" Hercules replied.

"The road to Brentre must be locked, how do you break out of the encirclement?"

"Where are we going, then?" Hercules asked.

"Go to Power City, it's the closest to Laman City, and it's a fuel base where there are a lot of berserkers stationed. It's wisest to go there from all angles! Gusas stretched out his right index finger and gestured in the air, pointing at the country.

"Your Excellency's words are reasonable, then let's rush to Power City!" Hercules said to Tianxuan while carrying Nicos.

Then, Tengen and Hercules prepared to go to the city gates with Nikos. But at this moment, a voice came from one of the operating stations in the room: "Alarm, alarm, a large number of poisoned people are approaching here." ”

Gu Sath pressed the screen on the console, and the image of the city lord of Yuwen Quan appeared

"City Lord, what's wrong?" Gusas asked.

Suddenly, Tianxuan and Hercules became very panicked, so they hurriedly rushed out of the door, but they saw dozens of burly poisoned people entering the hall on the floor under their feet, and blocking all passages.

"How's that okay?" Tianxuan looked at Hercules with a panicked expression and said, "How do we get out of this building?" ”

"Catch!" Hercules took Nicos off his shoulder and put it straight to the sky, then gritted his teeth and said, "You follow me, let me fight a way out!" ”

Tianxuan took Nicos in his arms, looked at Hercules, and sighed softly, "Hey! Then he was ready to rush out with him.

"Wait!" Gusas stopped Hercules, "Where do you want to run?" ”

"What do you mean by that, Your Excellency Archon?" Hercules had just gritted her teeth and relented.

"Come with me, don't be brute!" After saying that, Gusas pressed the switch somewhere, and the transparent glass under his feet suddenly became blurred, and then turned into a white marble floor.

"This is? ......" Tianxuan looked at the changes on the ground with some doubts.

"This is to anticipate the intruders in advance. Now that people have come up, they must be eliminated! I paused for a moment and said, "Don't stand there stupidly, come with me to the room!" ”

Then, Tengen carried Nikos and Hercules back to Gusas's room.

"You're hiding behind that glass screen!" Gusas said, pointing to a screen in the center.

Hercules glanced at the screen, although it was fenced on all sides, it was only a meter high, and what was even more ridiculous was that the four screens were all transparent, as long as someone opened the door and came in, they could see it at the first time, unless they were stupid enough to be blind.

"Your Excellency, are you kidding me?" Hercules said angrily.

"What do you mean by that?" Gusas was a little confused about Hercules' performance.

"See for yourself, this screen is all transparent inside, we hide in it, anyone can see it, if it is placed in the corner, I may think about it. Forget it, you're still joking at this time, I think it's better for me to kill it! Hercules twisted his head and said with some disdain.

Seeing that the atmosphere was so embarrassing, Tianxuan wanted to reach out and pull the corner of Hercules's clothes, but because he was holding a baby in his hand, he touched Hercules's ankle with his toes instead, and said: "Don't be like Hercules, my Excellency Sass should have his own reason, and should not make judgments!" ”

After listening to Tianxuan's words, Gu Sasi felt a little relieved, and slapped his palms a few times to express his praise: "Not bad, not bad, Tianxuan, you still have a bit of brains!" ”

Hercules was even more upset when he heard Gusas say this, which was obviously sarcastic that he was a puppet, but now the great enemy had no choice but to bite the bullet and say: "Your Excellency, please hurry up and give us advice, we are running out of time." ”

Gusas touched his beard, smiled a little smugly and said, "Anyway, you just hide in it, Hercules, don't you worry?" That day, Xuan took Nicolas in, and you can just watch it outside! ”

"Okay, I'd like to see what's famous?" Hercules was still extremely skeptical, and stood outside the screen and watched Tianxuan go first.

However, the moment Tianxuan entered, something magical happened. Hercules saw Tianxuan's body entering the screen slowly disappearing from sight, until the whole body entered, Hercules only saw the part of Tianxuan's neck floating in midair.

Seeing this, Hercules opened his mouth wide and was stunned.

Gu Sasi pointed at Tianxuan with his finger at this time: "Tianxuan, you squat down!" ”

"Good class!" As he spoke, Tianxuan squatted down. At this time, Hercules saw that Tianxuan and Nicos had completely disappeared from his sight.

"How is that possible?" Hercules' worldview completely collapsed, and his body was a little unstable.

At this time Gusas walked up to Hercules, stood on tiptoe, patted him on the shoulder, and said, "How is the lad feeling?" What do you think of my technique? ”

"I ...... I...... It can only be said that no one can match it! I really admire! In the face of such extraordinary technology, Hercules also had to be impressed.

"Alright! Don't be stunned, let's hide in with Tianxuan! As he spoke, Gusas nudged Hercules on the back.

Just as Hercules was stunned, hurried footsteps sounded outside the door.

"Don't be there, get in!" Gusas said as he pushed Hercules towards the screen.

A few seconds after Hercules hid inside the screen, there was a knock at the door. Seeing that they had completely disappeared from sight, Gusas hurriedly closed the top of them, and then hurriedly opened the door so as not to arouse suspicion.

"Charles?" Gusas expressed surprise, "Why didn't you go out and run here?" ”

"I can't help it, when I just searched the confinement room, I found that the newly captured alchemist was gone. And one of the people who came in and out of there during this time was the three of you. Charles said with a questioning attitude.

"Are you suspicious of me?" Gu Sas deliberately raised his eyebrows and raised his voice.

"Yes, you're right!" Charles glared at Gusas without showing any weakness.

"And what do you want?" Gusas leaned against the door, clasping his hands on the quilt and said.

"We're just searching, and it's also to restore your innocence!" Charles said as he forced his way in.

"Alright! All right! Gusas stood aside and raised his hands, and said in a mocking tone, "Search, search!" ”

Charles and the five guards who followed him turned Gusas's dwelling upside down, but found nothing.

After a while, Charles walked up to Gusas with his men: "After the search, you are indeed innocent, and I am deeply sorry for your interruption." ”

"It's nothing, it's okay to cooperate with your work!" Gushas said with a smile.

"Thank you for your understanding, but there's one question I'd like to ask!" Charles asked.

"Please!" Gusas said as he stretched out his palm to Charles.

Charles's eyes scanned around and said, "Why are your two henchmen missing?" ”

"Huh? Two of my henchmen are missing? They should be sorting out their essentials on the ground floor! Gusas feigned an innocent look and said, "Go down and see where they should be." ”

"Thank you!" Saying that, Charles stretched out his arm and went around in a half-circle, and said to his subordinates, "Let's go, go to the first floor!" ”

When Charles and his minions left, Gusas restored the ground from marble to transparency. After making sure that they had reached the first floor, Gusas opened the lid on the screen and said to them, "Alright, the people are gone, you can come out." ”

"Wow! Oh my loins! Hercules slowly straightened up with his hands on his hips. At this time, a pimple was twisted in the center of his brow, and his eyes opened and closed, which was quite painful for a tall man like him who was more than 1.9 meters tall for a long time.

"Are you alright?" Tianxuan was inconvenient to pull Nicolas because he was holding him, so he had to comfort him.

"It's okay! It's okay! It will be fine in a while! Hercules said slowly.

"Your Excellency Gusas, how did your magical glass achieve the stealth effect?" Tianxuan's curiosity surged back after seeing that Hercules was nothing.

Gusas touched his chin and said with a smile: "Hehe, I'll explain it to you briefly!" We can see objects because our eyes can see light from objects, such as the sun, fire, lamps, etc., and different colors emit different wavelengths and intensities. ”

Gursas turned around and continued, "For opaque objects that do not emit light, different colors are produced by different absorptions; For transparent objects, because the refractive index is different from air, there will be reflection and refraction at the interface, and the reflected light or refracted transmitted light can be seen and found to be different from the background. For example, the refractive index of air is about 1, water is about 1.33, and ordinary glass is 1.5, and it is easier to find in glass in air, but it is more difficult to see in water, and it is impossible to see it in a solution with a refractive index close to that of glass. ”

"Refractive index, I understand this!" Tianxuan nodded.

"Well, to achieve invisibility, that's one of the important factors. Another factor is that we can perceive light because in the photoreceptor cells on the retina in the eye, the photoreceptor pigments absorb the corresponding light and undergo chemical changes, generating electrical signals to stimulate the optic nerve and transmit it to the brain to produce light perception. ”

"Then you're using the second method!" Tianxuan seemed to understand.

"Yes, you're right. I used four optical lenses of different materials and arranged them so that objects in the space enclosed by the glass screen could not produce wavelengths to the retina. In fact, as long as you wear red or yellow colored glasses, you can see through this invisibility. But you know, who doesn't have to wear these tinted glasses, right? Gu Sath said with a slight teasing smile at Tianxuan.

Tianxuan admired this scientist from the bottom of my heart, and I stretched out two thumbs up to praise it autonomously.

At this time, the alarm sounded on the console again, and Gu Saas hurriedly turned on the 3D holographic projection. It turned out that Charles did not find anyone in the Archon's Hall and ordered to prepare a blockade of the entire Laman City. When Gusas saw this information, the joints of his fingers rubbed repeatedly on his forehead, looking a little anxious.

After about two minutes, Gusas stopped rubbing his forehead, gasped, turned to Tianxuan and said, "You don't have much time to rest, although I still want to keep you here, but you also see that the situation is very urgent now, I have to send you out of the city immediately!" ”

After saying that, Gusas led them out quietly through the front door on the first floor, and then went straight to the city gate.

"That's it! I can only send it here! Gusas said solemnly.

"It's all right, Lord Gusas. You've helped us enough, so we're on our own! Tianxuan could only nod and thank because of the person he was holding.

Hercules was not unkind, and also expressed his gratitude to Gusas.

After a few pleasantries, Tengen and Hercules took Nikos to the Wind Protector, and Gusas immediately left their sight.

Read the first book of the novel