Maybe it's because it's dark under the lights, or maybe in the eyes of the Ye family, Bi Mercury is just a private garden for them to relax, anyway, the supervision on Bi Mercury is not strict, and there are many loopholes that can be exploited.

After Zhang Yuan and Lu Meng came down from the little airship, Zhang Yuan opened the Eye of Insight, looking for a place where he could safely build a new mecha.

Looking for it, Zhang Yuan found a natural cave.

The entrance to the cave is large, more than 5 meters high, and once you enter, it is a place similar to observation, and there are some traces left by tourists in the corner.

Zhang Yuan walked in front, Lu Meng followed, and the two of them walked along the passage one after the other, the passage became narrower and darker, and finally only one person could crawl through.

"Zhang Yuan, can this place work?" Lu Meng asked in a low voice.

"No problem, follow me." Zhang Yuan said firmly.

The two of them continued to walk along the zigzag passage for a full 3 kilometers, many of which were impassable to ordinary people, thanks to their strong physical fitness and some high-tech equipment.

By this time, they estimated that they had gone deeper than 500 meters underground. The passage became a little wider, and there was a 'tick-tock' sound around it, but the environment was still extremely dark, and even with both of them holding light sticks in their hands, it still felt very dark around them.

"A little further on." Zhang Yuan said in a low voice.

After walking about 200 meters, the passage suddenly became very open, and you could still hear the sound of running water and the sound of the wind, and the echo could be clearly heard when the footsteps stepped on the ground.

"Click~"

Zhang Yuan lit a lighting balloon, and the soft and bright light immediately sprinkled the entire underground space, which was more than 200 square meters, more than 10 meters high, the ground was flat and dry, and there was a clear stream near the stone wall.

"The rocks around this cave contain a thin natural spiritual rough that has no mining value, but can withstand the rhodium magnetic detection rays of the sky satellites. At the same time, standing in a specific position, you see me here, it is in this small circle of less than 2 meters, the spiritual force field interference in this area is slightly weaker, standing here, we can maintain communication with the outside world, but it is also possible to be detected by the outside world. ”

Zhang Yuan drew a small circle on the ground with red paint and wrote the words 'communication area'.

"As for the rest of the world, it's a complete blind spot, and in this place, we can do anything without fear of being discovered by the Empire."

Lu Meng looked at this big underground cave and said with a smile: "No one interferes, no one peeps, it's really a paradise." ”

Zhang Yuan laughed: "Xanadu is not found, but created by yourself." Look at the Ye family, the entire Bi Mercury is their back garden, they can do whatever they want, no one can care. ”

Lu Meng spread his hands and said helplessly: "They are nobles, and they are born with authority." ”

"Aristocrats?" Lu Meng's demeanor made Zhang Yuan's heart move slightly, and he asked, "Why are you so pessimistic, commoners can also become nobles." As far as I know, if you join the army and accumulate enough military merits, you can be awarded. ”

This is what Xia Xiyan said to him, and she also said that awarding the medal in this way is not only to obtain a title, but also many privileges, such as establishing a space city, developing asteroids, and even cultivating a personal guard, and in the affairs of the empire, she will also get a lot of say.

Building up military merits, becoming a powerful warrior, becoming a nobleman, and getting in touch with the more core imperial secrets were the biggest motivation for Xia Xiyan to join the army of Heyue Province and fight hard.

Without thinking about it, Lu Meng glanced at Zhang Yuan, and said with a smile: "What's the matter, you, the god of war, also have a mind?" ”

"A little bit of an idea." Zhang Yuan said frankly that he and Lu Meng have lived and died together many times, and Zhang Yuan can completely show his mind to her.

At this stage, he has this intention, but he has not finally decided on it, because he does not know enough about the Crimson Empire.

Unexpectedly, when Lu Meng heard Zhang Yuan's words, he shook his head categorically: "Zhang Yuan, I advise you to dispel this idea." The so-called military merit was quite reliable in the early days of the empire, but now, it is just a beautiful lie. Those soldiers who were awarded medals were nothing more than high-ranking thugs of the hereditary aristocracy. To rely on such a small position to lay the foundation of the family is a dream. ”

"Oh?" Zhang Yuan raised his eyebrows, waiting for more explanations from Lu Meng.

Lu Meng didn't say much, she shook her head and said: "Actually, there is nothing to say, it's just that the class is solidified." The interstellar space is full of dark nebulae, starry beasts, interstellar bandits, and all kinds of fanatical organizations, and the safe areas are very limited, and since the development of the empire, these areas are all controlled by various nobles, and there is no place for latecomers to stand. ”

"Oh, I see."

Zhang Yuan nodded, he ended the topic, began to open his space folding bracelet, walked around the underground space, and laid out the energy core, advanced printer, and advanced materials contained in the bracelet one by one.

He beckoned to Lu Meng: "Come and see my good things." ”

Lu Meng walked over, walked around the equipment and materials, looked at the things one by one, and after reading them, she pointed to the printing materials and asked, "Zhang Yuan, how many more of these materials do you have?" ”

Zhang Yuan took a look and found that Lu Meng was referring to the core magnetic permeable material of the Doomsday-level mecha rhodium magnetic engine, Fei Lengyu, this thing was dismantled by Zhang Yuan from several doomsday-level powerhouse mecha in the Gray Valley Planetary Belt, originally, he originally had a total of more than 60 kilograms on hand, but after he built many rhodium magnetic engines, these materials were only 10 kilograms.

This is also due to the new architecture of the lava engine, which allows for significant material savings. These 10 kilograms of jade can build two rhodium magnetic engines in the upper stage of the apocalypse at most.

Now that Lu Meng asked, he touched his nose a little embarrassedly: "That's all." Fei Leng Jade is a strategic material that is strictly forbidden to flow out of the major empires, and it is said that a thing called a furnace is used to synthesize this material......"

The material crisis, Zhang Yuan had long anticipated, and he came to the Crimson Empire this time for another purpose to find high-end materials, because in the starlit land, the industry of the Crimson Empire is the most developed, and it is the largest exporter of high-end materials and manufactured products.

The Aum Empire and Sky City have a considerable degree of dependence on the Crimson Empire in this regard.

Lu Meng squatted down and carefully picked up the Fei Leng Jade, this kind of dark green crystal with a crystal like jade was wrapped with a cold brilliance like a substance, which was very exquisite, and people would have a deep attachment to it at a glance, as if their hearts and minds were attracted to it.

After looking at it for a while, Lu Meng carefully put the Fei Leng Jade back into the suspension base, and said in a low voice: "Fei Leng Jade, produced by the Royal High Crystal Factory, one gram is worth 7 million star shields, and it is produced by the Imperial Family's Creation Furnace powered by a giant black hole as the energy core, and it is the lowest-end product of the crystal factory. ”

Zhang Yuan had never heard of these news, but when he heard it at this time, his heart was shocked: "Fei Lengyu is the lowest, so what about going up?" ”

"Further up, they are the Ice Emperor Jade applied to the Doomsday Absolute Mecha, the Azure Stone applied to the lower mecha of the God of War, and the Creation Crystal applied to the middle mecha of the God of War, and then ....... I don't know either. ”

Zhang Yuan's heart was surging when he heard this, and he asked again: "The Emerald Jade of the Aum Empire is imported from the Crimson Empire, can't they make it themselves?" ”

Lu Meng explained to Zhang Yuan in detail: "Of course they can make it themselves, but their technology is not as good as the Crimson Empire, and the performance of their furnace is not as good as that of the Crimson Empire." The cost of manufacturing the same weight of Fei Leng jade is much larger, and the quality is slightly worse, which is not as cost-effective as importing. As for the higher-end Ice Emperor Jade, Lapis Lazuli, and Creation Crystal, the Crimson Empire will not export them, and the Aum Empire itself can naturally make them, but the cost will be relatively high. Correspondingly, the same is true for Sky City. About 150 years ago, the Dark Asura Empire successfully built its own Creation Furnace, which is also the fourth known Creation Furnace in the Starlight Land, making the Dark Asura Empire the fourth largest interstellar power outside of the three empires. ”

Zhang Yuan asked again: "Lu Meng, then do you know what the rhodium magnetic permeability of the crystal is?" ”

Lu Meng frowned and recalled: "It's about 7 yuan cut (unit), I don't know how much, I didn't have the right to contact this kind of top secret before, but it definitely won't exceed 8." Because once it exceeds 8, it is theoretically possible to create a pure mecha with infinite power. The Crimson Empire doesn't have it at the moment, and neither does the Starlight Lands. ”

This answer made Zhang Yuan's heart tremble, why? Because the activated steel of the Spirit Mirror Engine applied to the White Angel Mecha is a spiritual superconductor, converted to magnetic permeability, that is, only exists in the theory of 10 yuan cut!

7 yuan cut can create a god-level mecha in the middle of the god of war, 8 yuan cut can theoretically achieve a pure mecha, and 10 yuan cut ....... Zhang Yuan finally knew how violent it was for him to use activated steel to build an upper-stage Rhodium Magnetic Engine in the Doomsday!

He remembered the situation of the Earth Federation again.

"The Earth Federation has destroyed a lot of demon doomsday-level mecha over the years, Fei Lengcui must have a lot of inventory, General Denver is driving the upper stage of the doomsday mecha, his rhodium magnetic engine should have Ice Emperor Jade, plus the lava engine I designed does not use a lot of magnetic permeable crystals, and there is no problem at all to create 60 doomsday-level mechas...... But what about after 60 units? ”

The Earth Federation does not have a furnace, then there is no endless stream of magnetic permeable crystals, as long as the demons are undefeated, wars will always occur, 60 doomsday level mecha will always be consumed, and the scarcity of magnetic permeable crystals will become a big problem sooner or later.

Building a furnace?

It is absolutely impossible to do it in a short period of time, this is the foundation of the major interstellar empires, and it is impossible to get technical information, so how to solve the shortage problem?

The thoughts in Zhang Yuan's mind were racing, and after about half a minute, his heart shook violently, and he suddenly gave birth to an extremely bold and even somewhat evil plan!