Du Yuqi said:

"Central Control Room."

Jim said:

"Then you should take the road on the right."

Du Yuqi followed him, and soon they were blocked by another big door. This door seemed to be made up of three layers of composite doors. Jim spread his hands to show that he was powerless. Even if he cut off the power, he could only open one of the doors. The other two were fingerprint locks and password locks respectively. There was really nothing he could do.

At this time, a door opposite suddenly slid open slowly, and then a man in a white coat came over. When he saw Du Yuqi and Jim, he immediately showed joy on his face and said:

"You've come just in time. There's a big problem with the wiring in our lab, and we haven't sent anyone to fix it in two days! Come with me now!"

Du Yuqi glanced at Jim, who immediately understood and said helplessly:

"But, but the mission we have received now is to repair the damaged unit over there! We will be punished when we go back!"

The white coat immediately said angrily:

"Who is your superior? Tell him that I, Dr. Malka, have recruited you. I will be responsible for all problems. As for you, follow me quickly and fix that damn integrated circuit board for me, otherwise you will not be able to leave work!"

Jim was helpless in the face of such a strong doctor. Unless Du Yuqi turned hostile on the spot, he could only follow him. But he thought again, if this doctor led the way, wouldn't it be possible to enter some restricted areas smoothly? He didn't say anything more.

Dr. Marka was obviously a cautious person. After contacting the headquarters and confirming the identities of Jim and Lil, he took the two into the top-secret area. Of course, he also had a fierce quarrel with the person on the other end of the intercom. It seemed that the old man's violent temper was known to everyone among the senior management.

In the process of entering the top-secret area, they passed through two three-layer composite doors. Through the conversation between Dr. Marka and the staff nearby, Du Yuqi also learned that this department is currently in a state of decline.

Originally, the crystal block production department was the most important core department of the Iron Fortress, but how could Kamaka and Yangzi focus on production after they came here? They repeatedly transferred people from this department, and even some technicians were forced to do jobs like porters. Now the remaining people can't even maintain basic operations and can only barely maintain the machines.

However, although Kamaka and Yangzi were ruthless, after achieving this point, they did not dare to exploit this side anymore, nor did they dare to do anything to the bad-tempered Dr. Marka, because they knew that as long as they could preserve this department intact, then the Iron Fortress, even if it was damaged beyond recognition, would still be a goose that could lay golden eggs, and taking it over would generate profits.

In this way, Agamemnon would not completely lose his temper as long as the matter was not taken to the extreme. Of course, if you want to expect Kamokha and Yangzi to attach great importance to this department, forget it. When the Iron Fortress was operating normally, Dr. Marka was second only to the emperor. Sometimes even the captain of the fortress had to give way to him, not to mention the two small maintenance workers. At his command, the director and deputy director of the maintenance department had to come to help.

After entering the core area, Professor Marka directly threw a lot of work to the two of them, and then went to do his own thing. The environment here is completely different from the outside. The walls are full of shining LCD screens, and a large amount of data flows through them from time to time. The ground is also paved with something like crystal glass, which looks exceptionally clean and bright, and brand new.

Manpower is extremely scarce here. For a moment, in this huge laboratory of thousands of square meters, there are only three or five people including Du Yuqi and Jim. It is so quiet that it could scare ants to death. Looking at the large areas of empty seats, it is really a bit ridiculous.

At this time, Du Yuqi certainly didn't have to work, and all the tasks were left to Jim. He was looking around and it seemed as if he was inspecting everywhere, but in fact he was collecting various core information. Until Du Yuqi saw a sketch on the desk, he was stunned.

It turns out that although this sketch was hand-drawn with just a few rather sloppy strokes, it still looked quite vivid. It was a drawing of a steel fortress resting on the ground. However, after it rested on the ground, a long drilling column protruded downwards, so its shape looked similar to a thumbtack at first glance, and it was difficult to detect if you didn't look closely.

On this sketch, there should be a damaged drilling column drawn, and there are a few scribbled words next to it, which probably means that there is a problem with the drill bit.

Seeing this scene, Du Yuqi suddenly thought of the first time the Joker appeared, when he drilled out from a huge underground drilling machine. It can be seen that this mysterious organization has also achieved a very high level of attainment in underground drilling techniques.

After seeing this sketch, Du Yuqi suddenly became enlightened, just like finding a thread in a tangled mess. Then he discovered something strange: the internal sticky notes used by these staff members all had a clear watermark of "ZERO" on them! It seems that the internal code name of this mysterious organization is ZERO.

Next, Du Yuqi found some related information, which was the method of crystal production. After learning about this process, Du Yuqi was so shocked that he was speechless!

It turns out that the process of producing crystals is similar to that of oil extraction. First, it is necessary to explore the existence of underground crystal fields. After the reserves of the crystal fields are discovered, a steel base is dispatched to fly over. After landing on the ground, a drilling rig is used to continuously extract the crystal source liquid below.

The crystal source liquid does not exist underground, and there are many different opinions on how this magical substance is produced. The principle behind it is very complicated. After Du Yuqi found some information, he roughly understood the principle of mining.

It turns out that just like pus will flow out when a person is injured, the crystal source fluid is equivalent to pus, which does not exist in the human body at ordinary times. Deep underground in the Arad continent, there is a peculiar rock formation called the three-phase rock formation.

Once the refined catalyst is injected into the three-phase rock formation, a peculiar reaction will occur, quickly generating crystal source liquid, which can then be collected and used. Usually, the reserves of the crystal fields explored within the organization are determined by the size and direction of the local three-phase rock formation.

However, during the mining process, very serious pollution will be caused. Even after the mining is completed, this pollution will continue for many years and the harm will be extremely serious.

This feeling made Du Yuqi feel very bad. Perhaps it was due to his professional habits. This mining method reminded him of the cruel act of extracting bile from live bears. When Du Yuqi first entered the continent of Arad, the mad minotaurs and mad goblins he saw were the result of long-term pollution caused by this mining process!

The crystal source liquid that has just been mined actually looks very bad. It is black and sticky, and has a strong strange smell. It is also highly polluting. Similar to the mined crude oil, it needs to go through a series of complex processing before it becomes clean and harmless, and looks like various small crystals that are crystal clear and very cute.

The original intention of designing the Iron Fortress was to achieve "limited production capacity", reduce consumption as much as possible, and increase the time spent mining outside, so the power system of the Iron Fortress was directly designed to use "crystal source liquid" as the main fuel.

There is no need to replenish fuel under normal circumstances. Once the fuel is scarce, you only need to add a small amount of catalyst, and you can use your own stored "crystal source liquid" as a continuous supply of fuel. Even if the "crystal source liquid" you carry is insufficient, you can find a place with a crystal field for emergency mining and succeed.

At the same time, the ZERO organization also noticed the pollution caused by the production process, but they did not consider how to reduce or alleviate the pollution. Instead, they regarded the pollution as a very rare resource and used it to develop various weapons to deal with the enemy.

For example, the poisonous cat demon clan suffered a devastating blow because of this pollutant. At that time, the goods transported by the Xuzu Demon-Subduing Group were also raw materials with very strong polluting power. Somehow the news leaked out, and the hostile organization hired strong men to raid and destroy it!

…

After understanding so many secrets, Du Yuqi finally got preliminary answers to many questions in his mind. He then discovered that most of the areas in this steel fortress were actually for mining. The largest area was the drilling area that could go more than 5,000 meters underground, followed by the refining area and then the warehouse area. These three areas occupied a full 50% of the area of ​​the entire steel fortress. Therefore, to be precise, this was just a base mainly for production.

However, Du Yuqi also noticed that the full name of this steel fortress is "Arcturus Integrated Flying Warfare Platform", which means that military-related uses were also considered during its development. This is just like how many military factories switched to civilian production of tractors after World War II. In fact, with just slight changes, these manufacturers can produce large numbers of tanks again.

After getting the information he wanted, Du Yuqi didn't want to stay here and waste time. When he was thinking about how to leave, he suddenly heard a series of angry curses:

"Ren Ze, you idiot! You are an absolute idiot!! Who told you to pour me hot milk? I want black coffee! Black coffee that is so strong that it can make the devil's eyes bitter. I know your brain is a mess, but has it deteriorated to the point where you can't even understand what I say?"