The next day, Nangong Xiaoxiao stayed in the room and didn't go out.

Looking at Qin Feng's exhausted expression, the corners of Nangong Sheng's mouth twitched, "Can you young people take it easy, the entire courtyard didn't fall asleep last night." ”

"Hehe, uncle, it's not that I'm not leisurely, it's Xiaoxiao......"

Boom!

Something smashed on the door of the room, obviously Nangong Xiaoxiao in the room was expressing dissatisfaction.

At the beginning, it was Nangong Xiaoxiao who caught Qin Feng and didn't let go, but in the back, Nangong Xiaoxiao kept begging for mercy but couldn't get Qin Feng's forgiveness.

"We can't keep up with you young people, old man, but I can tell you, boy, you have to be safe wherever you are, and I don't want my daughter to be a widow. Nangong Sheng's face became serious, he was telling Qin Feng in the tone of a father.

Qin Feng is his son-in-law, a fast son-in-law who meets any of Nangong Sheng's conditions, and Nangong Sheng values Qin Feng no more than Hua Lao and Young, because his daughter is already married to Qin Feng.

Putting aside his other identities, Nangong Sheng was very proud to be Qin Feng's father-in-law, and at the same time, he also hoped that Qin Feng could pay attention to his own safety, because he didn't want to lose this son-in-law.

"Uncle Nangong, oh no, father-in-law, don't worry, the son-in-law hasn't added a grandson to you, how can I have anything. ”

"Hahaha, I like to hear you call me that, and I will listen to it again. Nangong Sheng smiled, Hua Lao had gradually transferred Xia's power to him, but this was not as good as Qin Feng's father-in-law.

Qin Feng smiled slightly, and then knelt down in front of Nangong Sheng, "Father-in-law is above, and he is bowed by his son-in-law!"

……

"Underground fortifications?"

"Yes, it's an underground fortification, others may not know about it, but I know that our underground fortifications in Xia are already very developed. ”

Qin Feng found Hua Lao again, and even called the old chief together.

In the summer, the most powerful weapon is not a quantum weapon, nor a nuclear weapon, but the advanced underground fortifications of the summer. These underground fortifications have long connected the provinces and military districts of Xia, and can achieve a nationwide transfer of combat materials in the shortest possible time. This underground fortification is a regional-level secret, and even people at the level of major generals don't know about it, only Xia's supreme leadership will know about it.

Xia not only has the best air forces, but can transfer ground supplies extremely quickly. However, the underground fortifications are not inferior or even surpass the air forces, because the powerful transportation capacity of the underground fortifications can completely quietly transfer all kinds of giant weapons.

"Yes, Xia's underground fortifications are indeed very developed, looking at the world, if the old man says second, I'm afraid no one dares to say first. The old chief looked proud, he was the first person to propose to build underground fortifications, although the old chiefs retired to the mountains and forests, but everything in the army could not escape the eyes of the old chief, and the old chief was also starting to improve the underground fortifications.

Hua Lao glanced at Qin Feng suspiciously, he didn't understand Qin Feng's intentions. Qin Feng made a special trip today, and even invited the old chief over, what the hell is going on?

"Open up a wider underground fortification, with the goal of being able to accommodate 1.3 billion people. ”

Qin Feng raised his head, his eyes blazing. Hua Lao and the old chief were shocked when they heard this, Qin Feng wanted to build an underground fortification that could accommodate 1.3 billion people!

Not to mention how huge the amount of work is, the meaning behind this move alone is enough to shock the two old men.

"Boy, is my Xia Future dark?" Hua Lao clenched his fists, the memory of the last invasion of the Netherworld was taken away by the traces of time, but Hua Lao heard Qin Feng talk about some of the situation at that time. Although Hua Lao didn't remember it at all, Hua Lao could imagine what kind of purgatory scene it was.

Today, Qin Feng proposed to open up a broader underground fortification, can he still not understand the meaning behind it?

Qin Feng shook his head, he didn't know what Xia's future would be, but he knew that it was not wrong to take precautions in advance.

"The underground fortifications should be at least one thousand meters or even two kilometers or less, and the strength should be at least able to withstand earthquakes of magnitude eight or above, which is completely achievable with our current level of science and technology. I don't know if the Nether Realm will appear again, but I know this is our last chance, and one that we must fight for. ”

Qin Feng's face was straight, this was the most important purpose of his return to the human realm this time, the demon realm had calmed down for a while during this time, but everyone knew that this was the tranquility before the storm, and no one knew when the next invasion of the demon realm would be, and whether it would affect Xia at that time.

Through the conversation with Pierce, Qin Feng knew the reason why the Hades Demon Realm would not invade the Western World, it turned out that the Hades Demon Realm was not interested in the divine power of the Western World at all, just like the Hell Demons in the Western World were not interested in Xia's power, the demons from different planes and different beliefs had completely different pursuits. At the same time, there is an invisible prohibition around Xia and some surrounding areas, a powerful prohibition that existed in ancient times, and this prohibition caused the demons of the Hades Demon Realm to only appear in Xia and some small surrounding countries, and not in the Western world.

In the same way, the sea monsters and demons in the Western world will not appear in Natsu, and the sea monsters in the Endless Sea last time swam along the sea, and did not appear directly in Natsu.

This also caused the pressure on Qin Feng's body to increase suddenly, because Xia was about to take on the heavy responsibility of guarding the human realm, and at the same time, he had to be ready to meet the invasion of the demon realm at any time. Therefore, underground fortifications are a project that must be carried out, and it must be carried out immediately!

"When the time comes, we can move people to absolutely safe underground fortifications at the first time, and even if the demons come, we can use extreme ways to deal with them. We can't put too much hope in the Nine Heavens, the only thing we can trust is ourselves!"

"That's the approximate scale, and then we can move to other areas through underground fortifications, and in any case, the first thing we have to ensure is the safety of the lives of the vast majority of people. ”

Qin Feng took out the planning diagram he had prepared a long time ago, this was only Qin Feng's preliminary structure, and the specific situation still needed to be discussed.

Because Qin Feng didn't know much about the previous underground fortifications, and he also knew the complexity of the underground fortifications, but Qin Feng's general idea was correct, build an underground fortification entrance in every city, county, and village, and then transfer the ordinary people through the huge underground fortifications, as long as the Hades Demon Realm did not destroy the entire Xia, then the safety of everyone could be guaranteed.

Qin Feng had even prepared for the worst, that is, Xia was ruined. But even if Xia is all occupied by the Hades Demon Realm, all the Xia people can be transferred to other regions through underground fortifications, and there is a strong prohibition in the ancient era, and the demons of the Hades Demon World cannot break through the prohibition, so naturally they can't go to other places to plunder.

In this way, even if Xia is destroyed, Xia's bloodline will never disappear.

Elder Hua and the old chief all gasped, and the more prepared Qin Feng was, the more they felt the seriousness of the situation. Even if this was the worst plan Qin Feng had ever made, who could guarantee that this worst plan would not come true?

"Okay, I'll order the underground fortifications to start at once, this project will take at least ten years, boy, do we have that much time?"

"I don't know, do your best. It is said that it is in the sky to make things happen, and if the sky is going to kill me, I have nothing to say, at least I have done my best. ”

Qin Feng clenched his fists, ten years of time is just a flick of his fingers in the Immortal Realm, but ten years in the Human Realm is a thousand years in the Immortal Realm!

However, what Qin Feng didn't know was that he confused a concept, there was a certain amount of surprise in the time of the Immortal Realm and the time of other planes, and this concept of time was not fixed, because a year in the Immortal Realm was not three hundred and sixty-five days. Therefore, ten years in the human world cannot be exchanged for an equal amount of time, but only a relative time.

Hua Lao also clenched his fists, "My life is up to me, not to the sky, and the sky is going to kill my summer, and I won't agree!"

……

"Did the second brother bring Zhan'er something delicious back!"

"Yes, yes, of course, how could I forget the fifth sister, Nuo, it's all delicious. ”

Qin Feng handed over a spatial ring to Zhan'er, which was full of delicacies from all over the world that Qin Feng had collected. After tasting the food of the human world once, Zhan'er was obsessed with the taste of the food of the human world, no, Qin Feng had just returned to the funeral family, and Zhan'er couldn't wait to greet him.

"I know that the second brother is the best for Zhan'er, Mu!"

Zhan'er stood up and kissed Qin Feng the face, and then ran to the side with the space ring to enjoy the delicious food.

"Fifth sister, eat less, be careful that you can't marry after becoming a pig. ”

"Go, go, I don't talk to people with stains, and the face of our beloved family will be disgraced to you. ”

"This ......"

Hao Jian was very embarrassed, the matter of him and Luo Yuan having fun in the Western world had spread all over the Immortal Realm, so Hao Jian was also punished by the Nine Heavens, if it weren't for Ruolan's help, Hao Jian was afraid that he would still be in the Nine Heavens prison at this time. Luo Yuan is even more miserable, this guy has left Luojiashan, and now Luojiashan has severed relations with Luo Yuan in the real sense, just go to Fenglou to have fun, and even go to the Western world, forget it when he goes to the Western world, and because of the big fight between women and others, he has become a talking point in the west.

Luo Jiashan really can't afford to lose this face!

"It's okay, it's okay, when our funeral family stands above the moon and the sky, these stains can only become our glorious memories ......"

Before Qin Feng's words fell, Hao Jian was slap in the face, "Lao Tzu came back and thought about it for a long time, only to find out that it was your kid's trap, you deliberately told the alien race our identity, just to see the two of us have a mess!"

"Oh, you found out, you're not as stupid as you imagined. ”

Qin Feng smiled happily, he had been cheated by Hao Jian so many times, he naturally wanted to repay Hao Jian when he had the opportunity, didn't he?

Hao Jian was so angry that he chased Qin Feng is a fierce beating, and Zhan'er looked at the two living treasures while eating snacks, with a smile in his eyes.

This kind of life may be the most fulfilling life, right?

"Zhan'er, how is the thing I asked you to study?"

After the fight, Qin Feng called Hao Jian and Zhan'er together, and burying the love family was not only Hao Jian's dream, but also Qin Feng's reliance. Now that he has agreed to cooperate with the Heavenly Master Mansion, Qin Feng has even greater ambitions in addition to developing things in the human world.

Hearing this, Zhan'er immediately put down her snacks, and her pretty face became extremely serious, "Second brother, I have completed the preliminary research, what reactor you provided me can be fused with the original weapon, but at least the king-level original weapon is required to fully fuse with the reactor." Ordinary human-level primordial weapons can only withstand the power of the reactor, and they can't be fused at all. ”

Qin Feng was a little disappointed in his heart, because he brought a batch of ordinary primordial weapons back to Xia and handed them over to Zhang Donghao for study, and now it seems that Zhang Donghao's research is about to fail, and at the same time, the quantum prototype that Qin Feng wants to equip the masters of the human realm with also means that it will come to naught.

However, Qin Feng quickly came out of his disappointment, the human realm cannot be equipped with quantum atoms, but the immortal realm can! His plan was still successful, and through Zhan'er's research, the feasibility of Qin Feng's research on quantum prototypes was confirmed.

"What about the power, how powerful is it?" Qin Feng looked at Zhan'er urgently, this was what he wanted to know the most. How much more powerful will the Quantum Atom be compared to the Force?

Zhan'er handed a three-foot long sword to Qin Feng and motioned for Qin Feng to try. Zhan'er only has the strength of the king rank, although she can fuse the quantum reactor and the king rank prototype through the powerful refining process, but she can't control the transformed prototype.

Qin Feng took a deep breath, and the strong force was violently poured into the long sword, only to see the white light on the long sword, and an incomparably dangerous aura suddenly bloomed.

"My goodness, where is this Nima the king-level primordial weapon, this is simply comparable to the heaven-level primordial weapon!"

Hao Jian looked at the extra cuts on his body out of thin air, and his eyes were shocked or shocked. He was the first cultivator to see the power of quantum weapons, and he was already afraid of quantum weapons.

Now it was clear that the original weapon that only had the king rank had bloomed with a sword qi comparable to that of the heaven-level original weapon, so much so that he was injured by the sword qi......

"Zhang Tianshi, take a look, how about our newly developed prototype?"

Zhang Zhiheng didn't speak, and carefully looked at the original weapon in his hand, Zhang Zhiheng was already shocked to the point of no return.

Because that seemingly ordinary king-level primordial weapon has the energy of a heaven-level primordial weapon, and even to a certain extent, the lethality of this king-level primordial weapon is far more terrifying than that of a heaven-level primordial weapon.

Because the sudden transformation effect of the quantum reactor is so powerful that the seemingly ordinary primordial weapon has unparalleled lethality.

。

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