When Sunday came, Li Xiang got the first opportunity to go out after coming to the polar night, and the time was from 9 o'clock in the morning to 9 o'clock in the evening, and there was a special shuttle service for the polar night.

With the envy of a group of trainees, a group of them boarded a heavy truck, gave the address of the place they were going to before getting into the car, and then were tied with their hands tied, blindfolded, and thrown into a container.

At first, Li Xiang was worried that he would have a conflict with Crazy Iron outside, but then this concern was quickly dispelled, and they got off the truck alone after being delivered to the location one by one, and the destination and so on would be kept absolutely secret.

Polar Night is still in City 0127, but it is far away from the Hou City he is familiar with, and the address given by Roca is in a medium-sized city called Black City.

Black City is located on the border of City 0127, bordering City 0126, and City 0126 is a famous unmanaged city, and the whole city is full of all kinds of cows, ghosts, snakes, and gods.

Heicheng is located in such a special area, and naturally there are many black areas.

Li Xiang took off his blindfold, the city in front of him was large, the outer city was still an ancient tall mixed city wall, there were towering defensive towers at the four corners, and under the pedestal, the city walls were full of roaring steam turbines.

The basic layout of the city is a typical trinity model, the top floor is an exquisite building suspended by steam power, which is generally the residence of the largest power manager in the city or the most important commercial center, which looks like a metropolis, and the middle floor is a layout from simple to messy, the middle class to the common class in the city all live in this area, there are skyscrapers that Li Xiang can occasionally see in Houcheng, and there are also low bungalows that only exist in the civilian area, and the air is covered with huge cobweb-like fine pipelines.

The lowest floor is the underground floor, which few ordinary people will go to.

In addition to the city's sewers and other infrastructure, it is divided into a large area, where the black market, gambling area, and underground boxing stadium that are not openly recognized by the military department are concentrated, and it is not uncommon for dead people to be thrown into the foul-smelling sewers at any time.

In this area, the danger is the greatest, and the benefits are also the greatest, and the underground world is full of dreams, gore, and hormones compared to the class-hardened upper world.

This kind of chaotic city Li Xiang has also seen for the first time, and it is completely different from the Hou City, which is used for residential and ordinary businesses, and the whole city is like a female giant beast spitting smoke.

After paying the twenty Blue Star Coins to enter the city, he received a temporary pass from the soldiers defending the city, which could only last for one day, and if he stayed in the city beyond this period, he would be arrested in the military prison if he was discovered.

As soon as he walked into the black city, Li Xiang was still shocked, this is the real steam city in his mind, there are horse-drawn carriages and steam locomotives spitting black smoke on the streets, and people walking in all kinds of costumes.

He tightened his trench coat and officially entered the underground world of the Black City after paying the toll of ten Blue Star Coins from an underground passage according to the instructions on the note.

The cool breeze blows into the mouth and nose, carrying the characteristic rotten smell of the underground, which is disgusting. Walking into this area, the atmosphere changed abruptly, and the people around them looked nervous, keeping a distance of about one meter from each other, walking on a high corridor next to the dark underground waterway.

"Hey, little brother, come and play, as long as one hundred Blue Star Coins, you will be happy." "Exposed girls on the side of the street whisper softly in a southern accent, and there are men dressed as adventurers who try to lure passers-by to the casino for a lot of money, and if they get a customer, they can get a handsome amount of marketing money.

Li Xiang paused for a moment to observe, and then continued to walk quickly, to be honest, the strange aura that filled the underground world had an indescribable attraction for young people of their age, young people like to try something new, and this place can fulfill all their wishes, as long as there are enough Blue Star Coins.

It's a pity that he had already seen too much in his previous life, and at the moment he just had an expression of appreciation, so he walked towards the note that said "No. 123 Black Street".

Black Street is one of the most famous long streets in the underground world, and no one who can do business in this chaotic area for a long time is easy to mess with.

Walking into this street, it turns from noise to tranquility in an instant.

Most of the people walking on the street were wearing black cloaks, and it was difficult to even see their faces, and when they saw Li Xiang walking on the road without any scruples, they all cast strange glances.

No. 123 Black Street is a small shop, there are a lot of mechanical devices hanging outside to let people know that this is a shop that sells machinery, he knocked on the door, a hoarse voice came from inside, and after getting the promise, Li Xiang pushed the door and entered.

"Ahem, cough, ahem, ......" The smoke and dust in his face almost choked him to death, and he finally got used to the scene in front of him, and was almost splashed in the eyes by the flickering sparks.

An old man in a shabby coat sat in front of a metal counter, crackling and polishing all sorts of novel tools, and smoke and sparks poured out of his hands.

"Sit down, wait until I'm done with this shell. The old man didn't look back, still busy with the work at hand.

Li Xiang was shocked, wasn't this old man the one who gave him the invitation code in Wanghai City?

The other party didn't speak anymore, he could only find a small bench to sit on, the whole house was quite large, but it was dirty and messy, full of all kinds of semi-finished products and mechanical parts, the only thing that could be seen was that this old man was making weapons such as firearms.

"Oops, failure, failure. After some polishing, the old man threw a hot bullet case to Li Xiang, he caught it, and almost threw it out, "There are currently two styles of machine guns, one is the common air column type, which sprays a high-damage vapor column to attack the enemy, and the other is the old bullet type that is almost extinct. Do you know the difference between the two and why the latter is obsolete?"

"Uh......" Li Xiang couldn't answer, he played with the bullet casing in his hand, just by touching, his essentia rose from 0.1% to 0.2%, these days of use and savings, he probably understood the principle of this ability.

It is to extract the essentia of those mechanical devices themselves, because magic particles exist in the air, and they can also attach to various objects, and they have no effect or effect on them, and the ability to extract is to liquefy the essentia attached to the mechanical devices.

In other words, the more friendly the mechanical device itself is to the magic particles, the more it can provide him with a high amount of liquefied essentia, and now it seems that as long as it is a machine-like device, it can be.

"Stupid!" the old man smiled and explained, "because you have such a good talent, why can't you think with your head?"

"The latter was eliminated because of the cost of bullets?" Li Xiang touched his head.

"Can't they afford that?!, you fixed that steam lamp that day, and I thought you were smart. I don't know the reason for this simplicity, think about it with your brain, whether it is a steam gun or a essentia gun, it is fundamentally just a matter of different driving forces, the essentia drive shoots out the air column is powerful, but the consumption is strong, the requirements for the user are high, and ordinary people can't support this use. The bullet gun uses bullets, and other structures can refer to the esshire gun, but the problem is in bullets, and the bullet making process has been lost!" the old man laughed dryly, "Understood?"

"I see. Li Xiang nodded, "I've been taught, the master is here to make bullet shells, is there a ...... to make bullets?"

"You're smart!" the old man got up, took off his dirty coat, and lit a steam device at the counter, "Go get me a cup of coffee." ”

"Oh......" Li Xiang went over to the counter and fiddled with the steam device, which was probably made by the old man, and the assembly marks were serious, but it was very convenient to use, and seeing that he was proficient in operating it all of a sudden, the old man raised his eyebrows slightly.

"My name is Old Ghost, and I will be your firearms teacher in the future, don't look at me, I am not taught in vain. Every week from now on, you will come over to help me look at the shop in the morning, and learn things in the afternoon, starting from the basic principles of firearms, to production, assembly, etc., as for the question you just asked, you will naturally know it later. Don't think I'm passing on your mantle or something, I just owe Roca a favor to kid Roca, and your talent is still coming, so I agreed. ”

"Oh, what are you making coffee?" the old ghost coughed dryly, and took out a dirty set of apprentice clothes from the cabinet and gave it to him, "Let's start with this coffee." If you want to soak in a noble lady or something, this is a compulsory subject!"

He drank Li Xiang's coffee, which was a simple completion of the apprenticeship, Li Xiang was still a little confused, but his intuition told him that this old ghost had a real level, and when he took a mechanical class in the polar night, he slowly found that he liked firearms courses more, and it seems that the hobby in his previous life will not subside even if he dies once.

The old ghost is indeed level, but his mouth is also very stinky.

Li Xiang, who was regarded as a genius by Roca and other cultural teachers in the polar night, was degraded as worthless here, and the old ghost used his own year to compare at every turn.

Soon Li Xiang found out why Rocca let him learn new knowledge here, this old ghost taught him all forbidden techniques!

What is the forbidden technology, it is a technology that is prohibited by the military department from private research, and if you are caught, you will go directly to prison, and if you are serious, you will be killed directly!

He learned terrified, but also full of interest, the old ghost's lectures are different, he is not confined to the textbook, but based on the textbook to extend, for Li Xiang, who has strong thinking ability, is simply the gospel.

Some of his whimsical ideas were also validated by the old ghost, though most of them were ridiculed as unbearable.

The old and the young were arguing in the shop, and the sky outside was getting darker.

Time flies, and when Li Xiang came back to his senses, he realized that it was already half past eight, and the day's class was very tense, and the old ghost almost ignored his receptive force, but fortunately his understanding was strong enough.

After saying goodbye to the old ghost, Li Xiang walked in the dark night and felt a brand new door appear in front of his eyes.