After Kuta and others left, Chu Chen asked Siyu and Anna to go down and clean up, preparing to lead them to the base commander's residence. After Siyu and the others also went down, Chu Chen¡¯s face showed thoughts, thinking about how to develop the base as his future base and rear area. In the past, although Chu Chen relied on the system and could come and go freely, after all, the system could not be exposed to others, and naturally it could not become the foundation for the development of power. But now that Chu Chen has served as the commander of the base, it is different. He can legitimately take the base into his own hands as the basis for development. But how to ensure the security of the base and how to develop the base into a steel fortress that cannot be broken by anyone, including surrounding bases and crazy zombies, has become an important problem that Chu Chen is now facing. After all, Sky Blue Star is no better than the Earth. It is in the doomsday period and is surrounded by dangers. Not to mention zombie lords like Monet coming to attack the city this time. Even if a zombie general leads a zombie army to attack the base, it will cause harm to a small base like Tianyun Base. significant threat. "And Chu Chen cannot stay in the base all the time, so he must rebuild and develop the base in a short time anyway, and make the base capable of protecting itself in the face of any threats. "Feifei, are there any props similar to the Sky Fortress in the system?" Chu Chen thought for a moment and asked Feifei casually with his consciousness. "The Sky Fortress, well, this really exists!" Feifei replied after hearing this. "What? There really is, that's great!" Chu Chen heard Feifei's answer. Overjoyed, he originally just asked casually, but he didn't expect the system to really surprise him. "What does the Sky Fortress look like? How big is it? How much exchange value is needed?!" "The Sky Fortress is divided into small, medium, large and super large, which can accommodate a population of 100,000, 500,000, 1 million and 5 million respectively. The required exchange value is five million, twenty million, fifty million and two hundred million. What, does the host want to exchange for the aerial fortress?" After Feifei explained the types and prices of the aerial fortress, she faced Chu. Chen asked. "Well, I want to exchange it for an air fortress. It can be used as a backup for the base. In this case, even if the base encounters any danger when we are away, Siyu, Anna, Kuta, and the important personnel and troops in the base will also I can have a hiding place that is absolutely free from threats! " "But the price is too expensive. Even a small base costs 5 million. My current exchange value is less than 3 million, which is not enough! After Chen Chen heard the price of the Sky Fortress, he immediately shook his head. "Who said the exchange value on the host is not enough? The exchange value on the host now is more than six million. Even if it is exchanged for a small air fortress, there will still be more than one million left!" Feifei heard Chu Chen's words, Fanning her glittering little wings, she flew to Chu Chen's shoulders and sat down, then said: "Host, have you forgotten that in addition to being able to be exchanged 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 now only a small base and is dilapidated, the host has become the commander of the base. The system calculated for the host, but gave the host a potential estimate of 3.5 million, which is 3.5 million. The exchange value is 100,000!" When Chu Chen heard this, he immediately remembered that there was such a thing. When he first got the system, the Supreme God once said that the exchange value is the potential value, and the potential value is the same as what Chu Chen has. The rights, status, wealth, strength and other aspects are closely related. 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 that the exchange value can be exchanged for status and power. After Feifei reminded him, Chu Chen suddenly thought again. got up. However, Chu Chen immediately thought of a question and asked: "Then the last time I was appointed as National Security Advisor and awarded the rank of Major General, why didn't the system increase my redemption value?" "Who said it didn't? It's just because the host wants to hide it. Although he was awarded the rank of major general and was appointed as the national advisor of the Huaxia Kingdom, others did not know that the power to improve the host's status was limited, so the exchange value added by the system to the host would naturally be less, and the host had never asked, so naturally I don¡¯t know!¡± ¡°So that¡¯s it.¡± Chu Chen suddenly realized that he was appointed as the Chinese Security Advisor and awarded the military rank because he was worried about exposing the existence of the system. Except for a few high-level officials in China, no one else knew about it. It is reasonable to think of a systematic calculation method in this way. "SinceSo, don¡¯t say so much, exchange it for me for a small flying fortress immediately! " "Well, but does the host plan to use the air fortress immediately, or choose to use it when needed? " "Tell me, what's the difference between the two? "Seeing Feifei ask this, Chu Chen immediately 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 redeem the aerial fortress and activate it to float in the air, but this will consume the air. If the Aerial Fortress cannot continuously replenish the energy of the fortress, it can only float and fly in the air for three days. After the energy is consumed, it will not be able to continue flying. " "But if the host chooses to wait for a crisis before activating the Aerial Fortress, after the system redeems the Aerial Fortress, it can directly bury the Aerial Fortress underground in the base and put it into a dormant state. In this way, the Aerial Fortress will basically not consume energy! "After Feifei finished speaking, she waited for Chu Chen's reply. "Three days are too little. What if the energy of the air fortress is exhausted? How to replenish it! " Chu Chen frowned when he heard this, feeling that the energy of the Sky Fortress lasted too short. "Electric energy and solar energy can be used as energy sources for the Sky Fortress, but these two energy sources are needed to fully charge the Sky Fortress. For a long time, the energy crystals of other cultivation civilizations. Spiritual stones can also be used as energy sources for the aerial fortress. Only two standard high-grade spiritual stones can maintain the energy required for the aerial fortress for a day! " "What about the price of standard high-grade spiritual stones? " Chu Chen was overjoyed when he heard that high-grade spiritual stones could be used as an energy source for the aerial fortress, and then asked. "A standard high-grade spiritual stone costs 30,000 in exchange value. " "Thirty thousand, um, I understand. Let's exchange the air fortress first and bury it under the base! ¡± Chu Chen knew that the standard high-grade spiritual stone is about the size of a baby¡¯s fist and contains a huge amount of energy. This can be seen from the fact that only two high-grade spiritual stones are needed to maintain the energy of a huge aerial fortress for a day. Therefore, thirty thousand The exchange value is not expensive. ¡°Yes, exchange it for the Sky Fortress for the host immediately! " With Feifei's sweet shout, Chu Chen suddenly felt a slight tremor in the earth. It was like a sudden earthquake. Even Monet, who was following Chu Chen with a face as calm as a pool of stagnant water, was also because of this sudden earthquake. The ground shook, and a trace of surprise flashed in his eyes. It took about half a minute for the ground to stop shaking. Then Feifei said: "Host, the sky fortress has been buried underground in the base, and the system is already in the center of the base. There is an underground passage leading to the Sky Fortress established in the Commander's Mansion. If the host wants to enter the Sky Fortress, he can enter through the passage! " "Um! " Chu Chen nodded when he heard this. At this time, Si Yu, Anna and the others were almost ready to return to Chu Chen. Then Chu Chen took Si Yu and his party to the commander's residence, and then waited for Kuta to come back, Chu Chen took them through the passage of the commander's residence and entered the Sky Fortress to visit. Because not everyone can enter the Sky Fortress, they must have permission, so Chu Chen set himself the highest level of permission. , and set up second-level permissions for Kuta, Anna, and Siyu. The second-level permissions can ensure that they can pass through the sky fortress unimpeded, and in the event of a crisis, as long as all three of them agree, the sky fortress can be activated. Siyu, Kuta and others were stunned when they entered the Sky Fortress. The Sky Fortress was three kilometers in radius and five hundred meters high. It was equivalent to one-fifth of the size of the base. Such a huge building, It was completely unheard of and unseen. Apart from being shocked, they were extremely curious and admired how Chu Chen used the method to bury such a huge aerial fortress under the base. Finally, when Chu Chen explained to them the various functions of the aerial fortress. After the effect, they were so excited that they couldn't restrain the ecstasy in their hearts. They also knew in their hearts that no matter what kind of crisis situation they encountered in the future, as long as the existence of this aerial fortress would ensure their safety and the safety of the base. The foundation was solid, and after staying in the Sky Fortress for a few hours, Chu Chen came out of the Sky Fortress. At this time, the sky was gradually darkening, and then Chu Chen came again. Ai Bo, who asked to see him, and the main officials of the base discussed and dealt with many matters regarding the reconstruction and development of the base. It was not until very late that Chu Chen spent a beautiful night with Si Yu at the commander's residence. They also stay in the base and handle various matters in the base.service. In the past two days, the base has initially stabilized. All the zombies in the base have been wiped out by the zombie hunters led by Kuta, and people's hearts have gradually stabilized. Chu Chen then held an appointment ceremony. Witnessed by more than 100,000 or 200,000 base residents, Chu Chen became the commander of the base and changed the name of the base to Cybertron. Although the residents of the base did not understand why Chu Chen named the base Such a weird name, but since Chu Chen got the name himself, no one would object. The first thing after the appointment ceremony, Chu Chen appointed Kuta as the captain of the base's general guard to organize the reconstruction of the base's army. He also appointed Aibo as the chief of political affairs, responsible for handling affairs in the base, and initially determined the Cybertron system. power structure. Then he made a plan to expand the base, recruit refugees from surrounding cities, train the army, expand and enhance the power of the base, and then recruited eight mechas from the system to serve 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, they were ready to take Monet back to Earth through the system. The reason why Chu Chen decided to take Monet with him instead of staying at the Sky Blue Star base was not only that Monet was powerful and could be used as his help, but the more important reason was that he did not dare to trust Monet yet. After all, Mo Nai's surrender was just out of fear of the power of the soul-controlling ring, rather than sincere surrender to him. Although the soul-controlling ring could restrain her and prevent her from having any unfavorable thoughts towards Chu Chen or committing suicide, it could not stop Mo Nai. Nai killed the people around Chu Chen. If she left Mo Nai at the base, if she really went crazy and killed Si Yu and others, Chu Chen would regret it before it was too late. Although Chu Chen brought Monet to the earth to let Monet know the existence of the system, but the person with the soul control ring controls Monet's soul and is not afraid that she will tell the secrets of the system, so there is no need to worry. The secrets of the system are exposed. (To be continued, please search Piaotian Literature, the novel will be better and updated faster! ps: ps: Thanks to the sleeping devil for the big reward