After Kuta and the others left, Chu Chen asked Siyu and Anna to go down to clean up, preparing to lead them to move to the base commander's mansion.

After Siyu and the others also went down, Chu Chen's face showed thought, thinking about how to develop the base as his future root base and rear.

In the past, although Chu Chen had a system to rely on and came and went freely, after all, the system could not be exposed to others, and naturally it could not become the foundation of the development force.

But now that Chu Chen is the commander of the base, it is different, and he can justifiably incorporate the base into his own hands as the basis for development.

But how to ensure the safety of the base, how to develop the base into a steel fortress that no one, including the surrounding bases and crazy zombies, could break, became an important problem that Chu Chen was facing now.

After all, Azure Star is not as good as the earth, it is in the last days, and it is full of dangers, not to mention that a zombie lord like Monet came to attack the city this time, even if a zombie general led the zombie army to attack the base, it would pose a major threat to a small base like the Tianyun base.

And he, Chu Chen, can't stay in the base all the time, so no matter what, he must rebuild and develop the base in a short period of time, and let the base have the ability to protect itself in the face of any threat.

"Fei Fei, are there any props in the system that resemble the Flying Fortress?"

Chu Chen thought for a moment, and asked casually at Fei Fei with his consciousness.

"Flying Fortress, well, this one really exists!"

Fei Fei replied when she heard this.

"What? It's really there, that's great! ”

Chu Chen was overjoyed when he heard Fei Fei's answer, he originally just asked casually, but he didn't expect the system to really surprise him.

"What does the Flying Fortress look like? How big? How much exchange value do I need to redeem?! ”

"The Flying Fortress is divided into small, medium, large and super large, which can accommodate 100,000, 500,000, 1 million and 5 million people respectively, and the exchange value required is 5 million, 20 million, 50 million and 200 million, what, does the host want to exchange for the Flying Fortress?"

After Fei Fei finished telling the types and prices of the Flying Fortress one by one, he asked Chu Chen.

"Well, I want to exchange for an air fortress as a backup means for the base, so that even if the base encounters any danger when we are not there, Siyu, Anna, Kuta, and the important personnel and troops in the base can have an absolutely unthreatened hiding place!"

"But this price is too expensive, even a small base costs 5 million, and my current exchange value is less than three million, which is not enough at all!"

After Chu Chen heard the price of the Flying Fortress, he immediately shook his head.

"Who said that the exchange value on the host is not enough, the exchange value on the host's body is now more than six million, even if it is exchanged for a small flying fortress, there will still be more than one million left!"

After Fei Fei heard Chu Chen's words, she flapped her crystal wings, flew to Chu Chen's shoulder and sat down, and said, "Host, have you forgotten that in addition to being able to exchange money for money, the exchange value is also related to the host's strength and status!" ”

"The host has just become the commander of the base, although the base is only a small base now, and it has been dilapidated, but the host has become the commander of the base, and the system calculates for the host, but it gives the host a potential estimate of 3.5 million, that is, the exchange value of 3.5 million!"

When Chu Chen heard this, he immediately remembered that there was really such a thing, when he first got the system, the Supreme God once said that the exchange value is not only the potential value, but the potential value is closely related to the rights, status, wealth, strength and other aspects that Chu Chen has.

It's just that for so long, Chu Chen's exchange value has been achieved by acquiring wealth and improving strength, and he has forgotten about the fact that the exchange value can be exchanged for status and power, and after Fei Fei's reminder, Chu Chen suddenly thought about it again.

However, Chu Chen immediately thought of a question and asked, "Then last time I was appointed as a national security adviser and was awarded the rank of major general, why didn't the system increase the exchange value for me?" ”

"Who said no, it's just because the host hides his identity, although he was awarded the rank of major general and appointed as the national adviser of Huaxia Kingdom, but others don't know that the power to improve the status of the host is limited, and the exchange value increased by the system to the host is naturally less, and the host has never asked, so naturally I don't know!"

"I see."

When Chu Chen heard this, he suddenly realized that he had indeed hidden his identity on the earth because he was worried about exposing the existence of the system, and that he had been appointed as Huaxia's security adviser and awarded a military rank, except for a few high-level officials in Huaxia who knew about it, no one else knew about it at all, so it was reasonable to think about the systematic calculation method.

"In that case, then don't say so much, exchange it for a small flying fortress for me right away!"

"Hmm, but does the host plan to use the Flying Fortress right now, or choose to use it when needed?"

"Tell me, is there a difference between the two?"

Seeing Fei Fei ask like this, Chu Chen suddenly understood that there must be a difference between the two, so he asked.

"If the host wants to use it now, the system can directly exchange the air fortress and start floating in the air, but this will consume the energy of the air fortress, if the air fortress cannot continue to replenish its energy, it can only float in the air for three days, and after the energy is consumed, it will not be able to continue to fly."

"But if the host chooses to wait for the crisis to activate the Flying Fortress, after the system redeems the Aerial Fortress, it can directly bury the Aerial Fortress under the base and be dormant, so that the Aerial Fortress will basically not consume energy!"

After Fei Fei finished speaking, she waited for Chu Chen's reply.

"Three days is too little, in case the energy of the air fortress is exhausted, how can I replenish it!"

When Chu Chen heard this, he immediately frowned, feeling that the time for the energy of the Aerial Fortress to last was too short.

"Electricity, solar energy, can be used as the energy source of the air fortress, but it takes a long time for these two energy sources to fill the energy of the air fortress, and the energy crystal of the Xiuzhen civilization, the spirit stone can also be used as the energy source of the air fortress, as long as two standard high-grade spirit stones can maintain the energy needs of the air fortress for a day!"

"What about the price of standard high-grade spirit stones?"

Chu Chen was overjoyed when he heard that the top-grade spirit stone could be used as an energy source for the Flying Fortress, and then asked.

"A standard high-grade spirit stone costs 30,000 exchange value."

"Thirty thousand, well, I know, let's exchange the Flying Fortress first and bury it under the base!"

Chu Chen knew that the standard high-grade spirit stone was the size of a baby's fist, and it contained great energy, which could be seen from the energy that only needed two high-grade spirit stones to maintain a huge aerial fortress for a day, so the exchange value of 30,000 was not expensive.

"Yes, exchange the Flying Fortress for the host right now!"

With Fei Fei's coquettish shout, all of a sudden, Chu Chen suddenly felt a slight tremor of the earth, as if an earthquake had suddenly occurred, and even Monet, whose face was as calm as a pool of stagnant water, also because of this sudden earth shaking, a trace of surprise flashed in his eyes.

It was only after about half a minute that the earth shook and stopped, and then Fei Fei said: "Host, the Flying Fortress has been buried underground in the base, and the system has established an underground passage to the Flying Fortress in the commander's residence in the center of the base, if the host wants to enter the Aerial Fortress, it can enter through the passage!" ”

"Hmm!"

Chu Chen nodded when he heard this, at this time, Siyu and Anna were almost ready to return to Chu Chen's side.

Then Chu Chen took Siyu and his party to the commander's residence, and then after Kuta also returned, Chu Chen took them through the passage of the commander's residence and entered the air fortress to visit.

Because not everyone in the air fortress can enter, they must have permission, so Chu Chen set himself the highest level of permission, and set up a second level of permission for Kuta, Anna, and Si Yu, the second level of permission can ensure that they can pass through the air fortress unimpeded, and in case of a crisis, as long as the three of them agree, they can activate the air fortress.

Siyu, Kuta and the others entered the air fortress, and they were all stunned, the air fortress is so big, three kilometers in circumference, five hundred meters high, it is equivalent to one-fifth of the size of the base, such a huge building, it is simply unheard of, unseen.

In addition to being shocked, they were even more curious and admired how Chu Chen used to bury such a huge aerial fortress under the base.

In the end, when Chu Chen explained to them the various functions and functions of the Flying Fortress, they couldn't suppress the ecstasy in their hearts with excitement.

I also knew in my heart that no matter what kind of crisis situation I encountered in the future, as long as there was the existence of this air fortress, I would definitely be able to ensure their safety and the foundation of the base would be solid, and after staying in the air fortress for a few hours and having a certain understanding of the air fortress, Chu Chen came out of the air fortress.

By this time, the sky had gradually darkened.

Then Chu Chen negotiated with Ai Bo, who came to see him again, and the main officials of the base, and dealt with many affairs of the reconstruction and development of the base, and it was not until very late that he spent a beautiful night in the commander's mansion and Siyu.

In the next two days, Chu Chen also stayed in the base, dealing with various affairs of the base.

In the past two days, the base has been initially stabilized, and the zombies in the base have been wiped out by the zombie hunters led by Kuta, and the people's hearts have gradually settled down.

Then Chu Chen held an appointment ceremony, and under the witness of more than 100,000 or 200,000 base residents, he became the commander of the base, and changed the name of the base to Cybertron, although the residents in the base did not understand why Chu Chen would take such a strange name for the base, but since Chu Chen personally obtained the name, naturally no one would object.

The first thing after the appointment ceremony was over, Chu Chen appointed Kuta as the head of the base's general guard, organized the rebuilding of the base's army, and appointed Ai Bo as the chief of affairs, responsible for the handling of affairs in the base, and preliminarily determined the power structure of the Cybertron system.

Then it was decided to expand the base, recruit the displaced people from the surrounding cities, train the army, expand and improve the power of the base, and then recruit eight mecha from the system as the defense force of the base.

After everything in the Cybertron base was on track, and after giving instructions to Kuta, Anna, Siyu and others, he was ready to return to Earth with Monet through the system.

The reason why Chu Chen decided to take Monet with him instead of staying at the Azure Star Base was that Monet was strong and could be used as his help, and the more important reason was because he didn't dare to trust Monet.

After all, Monet succumbed only because she was afraid of the power of the soul control ring, not a sincere surrender to him, although the soul control ring could restrain her, she couldn't let Chu Chen have any unfavorable thoughts about her, and she couldn't commit suicide, but it couldn't stop Monet from killing the people around Chu Chen, if Monet was left at the base, in case she really went crazy and killed Siyu and the others, Chu Chen was afraid that it would be too late to regret it.

Although Chu Chen brought Monet to the earth, he would let Monet know about the existence of the system, but with the soul control ring to control Monet's soul, he was not afraid to tell her the secrets of the system, and he didn't have to worry about exposing the secrets of the system. (To be continued.) )