It has been learned from the information obtained by Haoren and others that Lu Renyi has a high talent in electromagnetic research. He was originally an assistant to several other old professors, but by taking the time to learn electromagnetic theory, he was actually promoted to a higher-level electromagnetic researcher earlier than those professors.

Plasma grenades were developed based on his suggestions. Of course, as the level of monsters around them increased, the low-equivalent plasma grenades had more and more limited effects.

After Lei Jun disappeared, Lu Renyi had no idea about Haoren and once hid quietly until the Spider Queen was eliminated and the news of Hope City construction spread throughout Jinling City. Lu Renyi, who was eager to try, could no longer hide it, so he took the initiative to sign up and was valued by Qin Yang.

"This kid is really smart. According to the plasma mine improvement model he proposed, it will be very effective as a defense barrier. Arrange a plasma mine outside the insulated city wall. Tsk tsk, it seems too cruel to think about it." Qin Yang sighed so much.

"For plasma mines, isn't that thing very low in stability? If it doesn't blow up the enemy and blow up your own people, it will be not fun." Haoren questioned.

"So it's an improvement type. There is really no way to do stability. Even with Lu Renyi's talent, it cannot be solved. Unless the complete version of the drawing is found, Lu Renyi takes a flexible approach, reducing the amount of plasma and volume, reducing the plasma mine to half of the original power. The power is smaller, but it is more stable. I have asked someone to test it many times, and it is basically no problem."

Qin Yang seemed very appreciative of Lu Renyi, and paused. He asked again: "Is there anything you need to ask him? Now I hope the plasma mines near the city are deployed, but he is indispensable."

Haoren smiled and said, "Don't worry, I won't let him go to Shanghai and Nan Province with me, let alone the Teleportation Boots can't teleport two people."

Lu Renyi was quickly called to a separate room in the castle. It was his first time meeting with Haoren. He was surprised by Haoren's youth. At the same time, Haoren was even more surprised by Lu Renyi's youth. As Qin Yang said, he was a very talented boy!

Time is tight, and Haoren doesn't talk nonsense. He said straight to the point: "Then I want to know. Do you know anything about electromagnetic shields?"

"Electromagnetic shield? The main defense method in the early stage of mechanical civilization is based on electromagnetic force as protection. It has a very high attack defense ability against material systems, but its defense against energy systems is relatively low. Of course, electromagnetic as a means of early rise of mechanical civilization. In fact, it is a relatively outdated thing. According to my understanding, mechanical civilization is divided into early stages and late stages, with electromagnetic force as the main stages. The middle stages are mainly energy as the main stages. As for the later stages, there is no clear record at present. I am afraid that prehistoric mechanical civilization will not be destroyed by darkness even if it reaches the later stages. However, I personally estimate that the later stages should be mainly space."

Speaking of electromagnetics, Lu Renyi's eyes shone brightly and he started talking. Haoren just clicked a random topic, and he talked a lot of things. Haoren and Qin Yang both listened with relish, and of course Haoren did not forget his main topic.

"Well, it seems that your understanding is indeed very deep. What I want to know is very simple. How can you sneak into the electromagnetic shield without disturbing others?"

"Sneaking in?" Lu Renyi frowned and began to ponder for a long time.

After a long time, he could not get the answer. Haoren was slightly disappointed, but he did not blame him. Even though electromagnetics was an early technology in the mechanical civilization, it was impossible for humans to fully master it. If he really could not sneak in, he could only attack the city in southern Shanghai and was about to get up to comfort him.

Lu Renyi suddenly raised his head and said slowly: "It is not impossible to sneak in, just use an electromagnetic jammer."

"Very good, is the manufacturing of electromagnetic jammers easy?"

Lu Renyi considered Hao Ren's intention and briefly explained: "It's not simple. This thing consumes too much energy. However, if it is just a small electromagnetic jammer that interferes with local areas for a short time, it is also OK to create a disposable consumable."

"Consumables? How many resources are needed to manufacture?" Qin Yang asked.

"Well, if we really want to make it, we have sufficient materials at present, but therefore the burial of plasma mines will take at least one month."

"So long! This is just a consumable!" Qin Yang widened his eyes. He was responsible for the general coordination, so he naturally knew how difficult it was to collect materials from Jinling City in the current ruins.

Lu Renyi smiled bitterly: "There is no way. According to what I know, in mechanical civilization, the resources consumed by any defensive item are greater than that of an offensive."

The two of them set their eyes on Haoren and waited for his final decision.

"Let me build it, how long will it take?" Haoren said.

"Consumables only need to be used once, so the manufacturing accuracy requirements for all aspects are very low and can be completed quickly. Well, if you speed up the work, it will take four or five hours!"

"That's trouble!"

Lu Renyi quickly went out to prepare, and Qin Yang asked in confusion: "What happened in the southern province of Shanghai? Will the electromagnetic jammer be needed? Could it be that the people there are mainly mechanical civilization development and have conflicts with you?"

"Are human?" Haoren smiled bitterly and shook his head: "The problem is, I don't know if the person who occupies that city is still human!"

After briefly explaining the strange metal city in Shanghai, Qin Yang was so shocked that he couldn't speak for a long time. He finally recovered and rubbed his head and said, "It's such a strange world. I feel that we still have too little information. Fortunately, you went to Shanghai and South Province in advance. Otherwise, if you really encounter similar problems in the future, we will definitely be completely confused!"

It is a bit certain that all the tenth that the Shanghai-nan Province currently shows are the product of mechanical civilization. The question is, are all these people the remnants of mechanical civilization, or are mechanical technology mastered by the darkness?

Haoren rested for four or five hours. When he woke up, Lu Renyi had handed the electromagnetic jammer to him and taught him the method of use.

The electromagnetic jammer looks just a half-person-tall iron box with a few red and green buttons on the box, which are extremely simple, but thinking about it is a consumable item produced by rushing to work, I feel relieved.

The teleportation function of the teleportation boots appeared again outside the metal city in southern Shanghai. The moment he came out of the teleportation plane, there was a continuous sound of guns and cannons in Haoren's ears. Not far away, the fire was soaring into the sky, and explosions were heard one after another.

The first thought that Haoren came up with was that Gu Yingyue couldn't help but rush forward to attack alone? But it was quickly rejected, and she couldn't make such a big noise by herself.

"Hao Ren! Here! Here!"

In the pile of grass dozens of meters away, Gu Yingyue was showing half of her head and waved toward her. Haoren knew it and ran over, lying in the tall grass as the girl.

"What the hell is going on?"

"As you can see, the fight started." Gu Yingyue blinked and added: "It's been almost half an hour since the fight, it's about to end."

"I'm asking who fights!"

Gu Yingyue replied: "I don't know. Anyway, an hour ago, I was lying there bored, when I suddenly saw a group of people rushing up from the right side, intending to climb over the metal wall. They seemed to have some special instrument that could temporarily fail the electromagnetic shield. But within a few minutes the tank robots rushed over and surrounded the group of people, and then as you can see, a fierce battle."

"You didn't even go up and join in the fun."

Gu Yingyue snorted: "I can't tell who is enemies or friends. How can I help? Maybe I'll be shot together by both sides when I go up. Then I'm not wronged!"

Haoren nodded: "I'm pretty smart, come with me."

"Yeah, yah?" Gu Yingyue stopped immediately without taking a few steps and said suspiciously: "What are you going to do?"

"Snooze in! No matter who that group of people are, they have helped us a favor since they have attracted the attention of the guard tank."

Gu Yingyue reminded: "Where is the electromagnetic shield? The instruments of the group of people were destroyed first at the beginning of the battle, and the electromagnetic shield has now been restored."

"Just electromagnetic jammer, I have it too!" Haoren smiled and took out the iron box from the space package.

"Electromagnetic jammer?" Gu Yingyue turned her head and observed for a while, but couldn't understand such things. She shrugged and muttered: "I hope you don't cheat me!"

"Stop talking nonsense! The battle over there is almost over. If we don't go in, we will be discovered."

Both of them accelerated their pace and came to the foot of the city wall on the other side. Haoren first raised his fire wings and flew into the air, putting the electromagnetic jammer on the edge of the city wall. According to what Lu Renyi taught, he pressed the red button. A slight slash sound occurred in the iron box, and a light ripples radiated out from the inside of the iron box, rippling rapidly around.

The electromagnetic shield above the city wall immediately flickered and darkened. The electromagnetic energy seemed to be disturbed by some kind of interference. As it dimmed, another wave of ripples was rippling. The electromagnetic shield finally disappeared silently, but the disappearance was very small, about one square of about one meter in length. Although the electromagnetic shield outside the area was also partially disturbed, it did not disappear completely.

Haoren and Gu Yingyue carefully passed through the narrow corridor one after another. A few minutes later, a stream of blue smoke came out of the iron box, and the effect of electromagnetic interference dropped rapidly. The surrounding electromagnetic shields surged over again. In the blink of an eye, the iron box turned into a spark in the electromagnetic field.

"It's really a inferior product!" Gu Yingyue didn't forget to mock her.

"We are already in the city, so don't say such nonsense!" Haoren said angrily. (To be continued, please search for Astronomy, novels are better, updated and faster!
Chapter completed!