Early the next morning, Li Wuding found Dean Dong and mysteriously said that he wanted to rent a remote place with the academy and prepare to "benefit the monks".

"What are you renting such a remote place for, and what are you holding back?" Dong Chong was a little uneasy.

Li Wuding patted his chest, "Don't worry, it must be a good thing, not only the majority of students can use it, maybe the teachers will use it in the future, it is a great good deed that is good in the present and beneficial in the future!"

Dong Chong was skeptical, but for the sake of Li Wuding's reliability, he approved a huge desert for him, although it was also in Lingtian Academy, but it was a place similar to a testing ground, and Li Wuding was very satisfied.

After completing the formalities, he immediately led a group of friends to station.

A bunch of construction drawings were called up from the military notebook, and Shan Tao began to measure the site with a laser rangefinder and mark the location of the facilities according to them.

"You guys, dig an underground cave here, and the depth should reach a hundred zhang. Li Wuding commanded Shi Dongdong and them, so that they would not always be watching the excitement from the sidelines.

The combat effectiveness of the monk is strong, as long as half a day, all the ground and underground infrastructure have been built, the center of the field is a solid platform three feet above the ground, made of high-strength carbon fiber composite materials, surrounded by a circle of copper pillars that go straight into the sky, each of which has the thickness of a bucket, up to ten zhang, and is connected to the underground cave by a thick high-temperature superconducting wire group.

Li Wuding installed a large number of control equipment in the cave, and also ingeniously opened an empty practice room on the side, installed a small tokamak ring, just enough to accommodate a person to sit in it, and then connected a set of superconducting wires to it, and then he wrapped the whole room with a thick lead plate.

After doing this, he instructed the group to begin installing the silver hemispherical structures to the tops of the copper pillars on the ground.

After everything was ready, Li Wuding was satisfied to do the side, lit a cigarette, and admired this "masterpiece".

"What is this?" asked Xue Yuyan curiously.

Without waiting for Li Wuding to speak, Shan Tao on the side immediately explained, "This is a canopy-type direct lightning protection device, but I don't understand why the boss wants to place a tokamak ring underground?"

Xue Yuyan and Shi Dongdong %......&*&()......

What kind of bullshit is this?

Shan Tao scratched his head, thinking about how he could explain it clearly, "To put it simply, this is an active lightning elimination device, when the electric field strength of the downward pilot of the charged thundercloud to the canopy reaches the point that the charge of the metal electrode in the canopy is counter-discharged, that is, the upward pilot, the potential difference between the charge accumulated by the metal electrode and the ground disappears, and the high-voltage and high-current switch is turned off. At the same time, the upward pilot discharge and the downlink pilot of the charged thundercloud are instantaneously neutralized, destroying the conditions for the occurrence of lightning, so that no lightning strikes occur within the protection range. ”

"Even the active demine-canceling device made by the boss is too strong, even if it is the protection of a nuclear power plant, it doesn't need to be so powerful, right?"

The friends in the spirit world were even more confused.

"Speak human words!" Shi Dongdong couldn't help it, what kind of thing would it seem that we were very uneducated, okay?

Li Wuding threw away the cigarette butt, Shi Shiran stood up, and said with a smile, "This thing was built to prevent the recurrence of the tragedy that happened to Xue Yuyan, it can help the monks survive the thunder tribulation within a controllable range, I named it the 'Tribulation Array'." ”

"Huh?" Xue Yuyan was both surprised and a little incredulous, "This magic circle is not very powerful, can it really protect against the powerful Thunder Tribulation?"

Li Wuding explained, "Whether it is a naturally occurring thunderbolt or a thunderstorm caused by a broken mirror, the basic principle is almost the same, the principle of this device is to fill the charge from the ground to the metal electrode through the grounding wire, and destroy the thunder and lightning in the air, so as not to let the thunder and lightning fall, of course, you can also selectively let some thunder and lightning fall, so as to help the monk cleanse the impurities of the body." This is controllable. ”

"I know you may not be able to understand the concept I'm talking about, but this is the result of our civilization, which is slightly different from the spirit world. ”

Shi Dongdong exclaimed, "Boss, in this way, aren't you all over the place full of high-level monks, who are awesome and roaring?"

Li Wuding's face twitched, and he said stupidly, "We don't have monks, let alone high-level monks. ”

Shi Dongdong became more and more incomprehensible, "There are such powerful auxiliary cultivation weapons, there are no monks, how ...... are you" Okay, he didn't dare to say the word "poor", because he found that Li Wuding's face was not too good-looking, so he had to shut up.

Xue Yuyan smiled and said nothing, she had been to the earth, and naturally knew that what Li Wuding said was true, and it was not the same thing as what Shi Dongdong thought, on the earth, except for Li Wuding, she did not find anyone with spiritual root qualifications, which was very strange.

Li Wuding waved his hand, "Okay, tonight, I will participate in the activities of the Spirit Ball Club, and it will be officially announced at the event to help the monk who broke the mirror to cross the catastrophe, let's see, how much is the appropriate fee?"

Ahh - charged?

It wasn't until this time that everyone realized that this was a super business!

Think about it, in order to survive the thunder tribulation, how many monks have devoted all their strength to enhance their physique, buy all kinds of magic weapons to resist the thunder tribulation, and even fight for it, because this is related to their net worth and life, and they can't be sloppy!

"One, ten million medium-grade spirit stones?" Yun Xiangtian said after hesitating for a while.

"You're too petty, haven't you seen money?" Ji Chengfei's eyes burned, "A good magic weapon is this price, this is their life, is it just such a price? ”

Li Wuding was silent, and Shi Dongdong couldn't help but say, "Boss, it's better for you to decide." ”

Everyone looked at Li Wuding, if this thing is really so magical, with Li Wuding's character, I'm afraid he will be cut to death, right?

"That's it, let's not talk about money, the first three students who come here to rob are free. Li Wuding said with a smile, "Even if it is charged in the future, each student should not be too expensive, breaking through the Yuan Infant, the fee is 10,000 medium-grade spirit stones, the Yuan Infant period has not risen by a small level, increasing by 10,000, if it is a teacher, it will be charged at ten times this standard, if it is someone from outside, it will be charged at a hundred times, what do you think?"

Ah——!h

Everyone was stunned, not because it was too expensive, but because it was too cheap, right?

It's almost no different from giving it away for free.

What kind of medicine is sold in the boss gourd?

"He's here to help the Spirit Realm cultivate more monks! Only when the Spirit Realm has overcome the difficulties, all the efforts will be worthwhile!" Du Yanyu, who had been silent, said with a smile.

Li Wuding also smiled and nodded, it was so good to know what I was thinking!

Besides, this device is really not worth much on the earth, that is, it is extremely precious when it is put here, in terms of cost, charging a fee once will completely pay for it, and he does not need to fish too much on it.

The general direction is to fight against the invasion of the Demon Realm, and this is the most important thing!