The team resumed the queue and continued to rush to the research center.

    However, with a burst of surprise just now, the team was obviously more cautious. Not only did the distance between the team members get closer, but also the speed of joint travel slowed down a lot.

    He followed the team and ran forward. Although sun Cheng was curious about what important information revenge had to report to himself, he was afraid of others around him. He could only press that curiosity for the time being and prepare to go to the research center and look for an opportunity.

    Unexpectedly, he ran forward with the team for a few minutes, and suddenly the revenge in his arms shook again.

    "What''s the matter? Why did you contact me twice in such a short time?"

    The reminder of revenge again made sun Cheng feel uneasy. He was very aware of the revenge he had taught. If there was no emergency, it was absolutely impossible to remind himself twice in such a short time.

    At present, he couldn''t care about the exposure. While running, he fumbled and took out a revenge strengthened Bluetooth headset from his pocket. After opening it, he took it to his ears. Only then did he pretend to wipe the rain off his face, put his hand over his mouth and nose, and asked softly in Chinese, "what''s the situation?"

    "A special unit using optical stealth was found nearby, tracking the master..." the cold mechanical sound immediately sounded from the Bluetooth headset.

    "Optical invisibility?!"

    Sun Cheng was stunned when he heard the speech. He knew the concept of "optical invisibility". To put it simply, he used special materials and technologies to refract, bend and even reflect light, or simply created a layer of position around the object to achieve the effect of invisibility.

    As the leading University of science and technology in China, NTU also has such related issues and research. As far as he knows, not only the domestic optical stealth technology is still in its infancy, but also a more advanced European and American power in theory. It is difficult to realize the real optical stealth in the next 30 to 50 years.

    In other worlds, technologies such as "optical invisibility" have also appeared on Cybertron. Sun Cheng saw from the confused memory data that Decepticons did have the ability to be invisible during the second civil war.

    However, this kind of technology is very weak for mechanical life.

    The precision performance of both Decepticons and Autobots is beyond imagination. Their fire can not provide energy for any power plant, and the core processing efficiency is far higher than any supercomputer known to humans. The powerful memory and storage function can easily save all building data on any terrain. When the terrain is scanned again, When you find abnormal data that cannot be captured by the eye, you can easily lock the position of the invisible unit.

    Therefore, optical stealth technology prevailed on Cybertron for only a very short time and was soon swept into the corner.

    Vengeance has no fire source in its body, and its core is far inferior to confusing the body, but it can easily capture an "optical stealth" unit. It can be seen that the technology used by the invisible unit it found is far inferior to Cybertron.

    Sun Cheng did not doubt the authenticity of his words!

    Rather than believing in the loyalty of revenge, sun Cheng believes in his busy achievements in the different world. He has left multiple means in the core of the two Decepticons brought back to the real world to ensure their complete loyalty to himself.

    So now, when he heard revenge report to him that it found that an invisible unit using "optical invisibility" was tracking sun Cheng and them, his heart only sank for a moment and then raised it again.

    "Are you sure you can solve it? Revenge?"

    He asked again in a low voice in Chinese. It was hard to hide his expectation in his words.

    The invisible unit that inexplicably appeared on the island. Although sun Cheng could not guess its identity for a while, it was an indisputable fact that it was tracking itself, which was obviously a threat to himself and others.

    Now that revenge can capture this invisible unit, sun Cheng still doesn''t know what the strength of the other party is, but he has realized the "optical stealth" that is difficult to complete with the technology on earth. This can''t help but remind him of the new world integration on the night of landing on the island.

    "Could it be that this invisible unit, like the dinosaurs on nubula Island, is the product of world integration?"

    If it is as he guessed, then he has finally found a way for the iron warrior who has not had a clue for the past two days.

    The answer of revenge was very positive, "I can!"

    "Well, don''t make any moves until the target is determined to pose a direct threat to me!"

    That''s enough!

    Sun Cheng didn''t give any more orders. By wiping his face again, he took off the Bluetooth headset on his ear and put it back in his pocket. He calmly followed the team and continued to run to the research center.

    "Ah..."

    Seeing that he was about to cross the hills and walk out of the woods on the hills, suddenly a scream came from the back of the team.

    Major Dutch quickly waved the team to stop and shouted, "what''s the situation?"

    "It''s Bernard..."

    Soldier Harlan''s voice came with a faint fear. "Hell, he suddenly disappeared, major!"

    Major Dutch winked at Billy and motioned him to pay attention to the guard. He himself pushed sun Cheng away and they walked behind the team.

    Sun Cheng also turned around and looked at the back. He noticed that Bernard, the medical soldier at the back of the team, was missing.

    "Major, here..."

    Mike, the black sergeant who carried the machine gun, took off his hat. He seemed to find something and motioned major Dutch to lean over, "there are two fresh drag marks here, like those drawn from the foot of a shoe..."

    Looking in the direction of his fingers, sun Cheng and his team really saw two more shoulder width parallel traces on the ground, extending from the path they walked to the depths of the woods.

    Major Dutch squatted down again and looked carefully at the ground. He reached out his hand and touched a pool of sewage that had not been diluted by the rainstorm. He put his finger in front of his nose and smelled it. His face soon became gloomy.

    "Blood, damn it!"

    Tieqing had a face. His cold eyes swept through the crowd in turn, and immediately fell on black Sergeant Mike and private Hawkins. Then he slowly said, "stay on guard, Mike and Hawkins, you two come with me!"

    With that, he raised his weapon, took out the gun again from his tactical backpack, loaded the grenade launcher, and took the lead to chase after the drag mark into the woods.

    Behind his back, sun Cheng presses the revenge that vibrates again on his chest. He knows that the invisible ghost can''t help but start at last.

    ps：

    1. I felt bad when I came back from work. I made up for [Tokyo food] and forgot the time. If I didn''t pay attention, it was ten o''clock!

    2. Thank ''Ben Shao of the Feng family'', ''the birth of the poor'' and ''? Look at it‘ There is a pit ahead. Please enter carefully. ''the four readers gave a great reward.