As the upgraded new giant god weapon "Tianjing" gradually emerged, the evacuation work of workers and families of the Da Iron Factory was coming to an end.

Based on the new worry-free religion with a changed concept, countless "seeds" have been sown to dozens or even hundreds of underground towns. In the near future, they will inevitably float further and further away like burning dandelions, lighting up more dark places.

New magic weapons, new ideas, new hopes... may come to this sunless world earlier than I imagined.

It was time for Li Yao and others to leave.

They discussed the method of contact with Xu Zhicheng and further discussed the response strategies for cultivators to launch large-scale encirclement and suppression.

However, Li Yao estimated that the possibility of cultivators encircling the underground was not high.

It's the cost of the problem he mentioned at the beginning.

Now the reformists and the four electoral families are fighting in full swing. Both sides are doing their best to prove that they are the "orthodox" of the empire and completely eliminate each other.

But behind the reformists is the existence of the Black Star Emperor Wu Yingqi. The four electoral families of emperors have dominated the empire for five hundred years. No matter who wants to swallow the other party in one breath, it seems unlikely.

Apart from their special existences, the riots of ordinary people underground are really not worth mentioning. It is hard to imagine that when the Black Star Emperor Wu Yingqi faced the army of the four major electoral families, he could still draw a large number of elite troops to the ground, and drill through one tunnel after another, doing all the hard work, dirty work, just to catch a few inconspicuous ordinary people.

"I hope you can persist in the underground promise. At most, within a year and a half, the sky and the sky will surely break out in a shocking battle. The cultivators of the two factions will definitely fight until death. At that time, we will also come back with the real fleet.

"That's when the underground people see the light of day again!"

Li Yao promised Xu Zhicheng, all the worries-free believers and ordinary people underground.

They originally wanted to go back to the ground and find the last few Star Ports occupied by the four major electoral families.

After all, the situation in the imperial capital is getting more and more tense day by day. Seeing that the reformists are about to completely control the entire world of the sky, it would be very difficult to find a suitable starship to jump into the starry sea.

We must take advantage of the final retreat of the four electoral emperors and marching into it before we can escape, contact the righteous men everywhere in the Xinghai, and accumulate our own strength.

However, when Xiao Ming and Wenwen evacuated the Da Iron Factory, they took away the main controller Jingbra there. They were doing nothing but studying it as a toy, but they found something strange.

"Dad, Dad, look at the design drawing of the magic weapon component this is, it seems to be very big!"

When Li Yao and others were about to leave the ground, the two little guys came to Li Yao with a design drawing.

This design drawing was found in an order by them after breaking through a secret firewall of the main controller of the Da Iron Factory and parsing out a hidden database.

Because the firewall structure and the hidden mode of the database are quite sophisticated and complex, the two little guys studied it for a long time before breaking through the defense line, and they couldn't help but become interested in what was in the order.

“Isn’t this the gear plate on the shield machine?”

Li Yao glanced casually and saw it.

The shield machine is a tunnel boring machine, which is a large magic weapon specially used to open tunnels and expand underground space. In the underground world of iron plates, it is naturally an indispensable daily consumable.

In order to expand the living space underground, humans will refine and manipulate countless shield machines every minute and every second, constantly digging down, digging, digging, digging, digging out brand new factories, towns and tunnels connecting these places.

According to the working principle, shield machines are divided into mechanical, hydraulic, hybrid and very advanced black light crushing. Generally speaking, their front end is like a large millstone equipped with a large number of drill bits and iron teeth. When running at high speed, not only the independent drill bits will rotate at high speed, but the iron teeth will oscillate at a frequency of thousands of times per second. Even the large millstone will rotate at a high speed. Multi-pronged approach can only be used to drill a hard rock layer.

With such a head-on battle, the wear rate of the drill bit, iron teeth and the grinder itself is naturally very amazing, and relevant components must be replaced frequently.

Therefore, most of the magic weapons factories in the underground world have a complete range of shield machine spare component refining assembly lines, and the same is true for large iron plants. Not only can they refine spare components, but they can even refine complete shield machine, which is a "fist product".

It is really nothing strange to find a batch of shield structure components design drawings in the order of the Da Iron Factory.

But Li Yao glanced at the size of these components again and knew why the two little guys asked him with design drawings.

The length and width of the iron teeth on this batch of shield machines actually reached more than five meters!

Although Li Yao was not very familiar with large civilian magic weapons such as shield machines, he still had basic common sense. He focused on recalling several classic federal and imperial shield machine models and found that if the length and width of the oscillating iron teeth reached five meters, then the entire working surface of the shield machine, that is, the large millstone that was in the front, had a diameter of at least 100 meters!

In other words, such a shield machine "rumbles" and can drill a tunnel of 100 meters in diameter in the rock formation at once!

No, if the diameter is 100 meters, can it still be called a "tunnel"?

"Is this impossible?"

Li Yao murmured, hurriedly taking the orders found by the two little guys for a closer look.

He immediately discovered that this was not as simple as an order, but also included a complete set of refining process flow charts, a secret recipe for matching new alloy materials, and a high-end and sophisticated military technology transfer agreement.

For example, the oscillation frequency of an ordinary shield machine is generally between 3,000 and 5,000 times per second. No matter how high the frequency is, the material strength of the iron teeth and the structure of the shield machine itself will not be able to withstand it, and it will soon become bald and disintegrate.

But the performance parameters of this...the oscillating iron teeth used in this super giant shield machine actually reach more than 12,000 oscillations per second!

Such a high-frequency oscillation production process is naturally not available in large iron plants.

Therefore, this secret database contains a lot of how to refine it, and even the information of several experts. If there is no trouble with Li Yao and others, these experts will come to the large iron factory soon to improve the process and guide the local refiners and workers' work.

The harder the material for oscillating iron teeth is, the higher the oscillation frequency, and it will naturally crush stronger rock layers, or greatly improve the efficiency of excavation.

Raising the one or two-meter-long shock sword to 10,000 oscillation per second is a very complex technique, not to mention the iron teeth of five or six meters, and it also requires working under extremely harsh conditions.

This is the most advanced military technology, and it is definitely not qualified to master the "three-family slaves" like Li Minghui.

Li Yao's hands were running like a flying start, and he clicked on the technology transfer agreement and refining process flow chart. In addition to the oscillating iron teeth, there were also impact drill bits and components of a certain hydraulic system that had to be refined in the large iron plant.

Li Yao is an absolute "drill bit expert", but he is also deeply shocked by the working principle and refining method of this type of drill bit.

Although the secret database only contains orders and refining authorizations for a few magic weapon components such as iron teeth and drill bits, Li Yao can also roughly deduce how huge, majestic and terrifying the ultimate super-giant shield machine is!

This is not a shield machine, but an iron beast that devours the earth's core!

"Looking at the time of the creation of this secret order and refining agreement, it seems that Li Minghui betrayed the Dongfang family and defected to the Li family shortly after he defected to the Li family."

Wenwen said, "Especially, three powerful god-transforming men including Yue Wushuang came to the ground, and a large amount of critical data flowed into this secret database. They seemed to be trying to refine many similar components here!"

"That's right."

Li Yao estimated that if the refining process transformation and technology transfer mentioned in the database could be completed, the entire large iron plant would be able to operate at full speed, continuously refining a large number of shock iron teeth and impact drills to supply... More than a dozen super giant shield machines would be no problem to operate day and night.

More than a dozen super giant shield machines with a diameter of over 100 meters in operation surface rumble forward at the same time?

The immortal cultivator, more accurately, is Wu Yingqi, what exactly does he want to do!

Li Yao immediately discussed with Long Yangjun and Li Jialing.

"In other words, Wu Yingqi and Li Linghai's people occupy the large iron plant not only to act as a forward base for us to capture us, but to really need the large iron plant to help them refine a batch of very critical magic weapons and components?"

After listening to Li Yao's analysis, Long Yangjun went over and over and over again and looked at the information found by the two little guys for a long time and concluded.

"That's right, if we just want to chase us and capture Li Jialing, there is no reason to bring so many elite troops from the Imperial Guards."

Li Yao said, "The so-called human sea tactics are only meaningful when they can fully spread the fire line in a battlefield with vast space. However, immortal cultivators cannot know ahead of time and know that we will fight for the big iron factory.

"If the pursuit and counterattack are carried out in winding and narrow tunnels and gaps, no matter how many people are, it will not be of much significance. Instead, it will become a burden to consume materials and block the passage.

"Yue Wushuang's witch hunter is proficient in stealth assassination and is barely a helper; the elite troops of the Imperial Guard are good at head-on combat, and there is no need to bring these people just to chase us.

"And don't you think that there seems to be a little more materials they store in the big iron factory? It doesn't seem like they are performing temporary hunting missions, but they have to stay here for a long time."

“It seems to be so.”

Long Yangjun nodded thoughtfully, "I was also very surprised when I was raiding the Da Iron Factory. Is the 'Moon Demon' Yue Wushuang crazy? Just to chase us, why did he bring so many elite imperial guards down?
Chapter completed!