With the experience of the first layer and the confidence that comes from defeating the boss, the strategy of the second layer is much faster.

The first layer took more than twenty days, almost a month, to breach. And today is the eighth day for players to set foot on the second layer, the latest information on the front line, the raider team has entered the maze area.

The expansion of the combat power and skill improvement of the strategy group can be seen with the naked eye, and the large base of high-end players has brought rich material output, and the efficiency of the strategy will naturally improve a lot under the exchange of knowledge.

Shui Wang has also been running around recently...... Well, it was moved to [Taran Village], which is the last supply station in front of the labyrinth on the second floor.

The two of them have been hunting in the vast grassland for several days, and today can be regarded as a rest.

During this time, Wang Shui's [Gathering] skill was greatly exerted, and with a proficiency level of up to 700, almost two wasps could dig out a poisonous needle, and now the market price of each poisonous needle is about 1200 kol, and the market is vast.

With money, there is a basis for doing things.

Unlike the last supply station on the first floor, Taran Village is not a large town, it is a village built in the middle of a mountain after hollowing out a flat-topped hill, and the facilities are quite complete, and the blacksmith shop has a fairly high weapon level.

Of course, the nature that attracts aqua regia is not its proximity to the labyrinth area, but the mineral, saltpeter mine.

Recently, Wang Shui has been exploring the realism of SAO, and he originally had saltpeter on hand, and he still dug it out by himself, but the amount was very small.

Yes, everything is out of the mining site, the same mine produces both iron and silver, saltpeter is a super rare mineral, and the purchase price of NPCs is very low, very contradictory miscellaneous minerals.

When I was mining, Wang Shui wanted to play with this little saltpeter, and I didn't start testing it until recently, but soon it was gone, and there was nowhere to replenish it.

Because the wasp money printing machine was about to be turned on, Wang Shui had to go back to the first layer from time to time to compete with the low-level players in the dense forest to grab the man-eating grass, and there was a strange legend during the period.

It's roughly that there was a time in the dense forest area where not a single man-eating grass monster was brushed.,There are rumors among low-level players that the second layer is opened.,The legend that the monster resources on the first layer will be slowly exhausted.,Many players who were messing around on the first floor hurried to the second floor.。

Legend has it that when the Flying Storm was flying, the source of the calamity was turning on a wasp money printing machine in the second vast savanna.

He never had time to mine, but the turning point happened yesterday - the professional businessman who helped Shui Wang sell and handle various metal ingots (copper, iron, tin, lead, silver, etc.) and wasp poison needles sent him a report on the second-tier mining resources industry, trying to implicitly urge him to dig high-end mines.

Then Aqua regia saw a little cutie named "saltpeter" in the middle of a pile of goods with strange names such as "Planck iron ore", "Planck ingot", and "Orr silver ingot".

The price of a set of 20 pieces of saltpeter is 100 kol, the state is ore, and the weight is 1 kg. The ore in SAO is extremely pure, and the iron ore is silvery-white like elemental iron, which makes Aqua Aqua regia surprised and happy, so seeing saltpeter at this price in this state, Aqua regia almost shed tears.

The report was received yesterday, and only Taran Village has sales, and Wang Shui arrived here today, covering all the stocks of the ore and metal material shop that the blacksmith shop also operates, a total of 242 groups.

When Wang Shui returned to the small house under the name of the team, Shi Nai was already grinding sulfur and charcoal, saying that the charcoal was just burned by them today, and even the iron bucket with a lid for burning charcoal was just bought in the morning, and they were making charcoal while brushing wasps, which was already the ultimate use of their time.

"How's saltpeter?" These were the first words of Shi Nai when she saw Wang Shui, and she was more enthusiastic about these things than Wang Shui.

"No problem, has the iron pot been tested?"

Shino was grinding in the living room, and to her right was a large open kitchen, where there were two large continuous stoves, on which two deep-bellied iron pots were placed.

"I tried it, the water boiled quickly, it cooled gradually, the temperature could be controlled, and there was no need to put in extra fuel in the kitchen."

"Tsk, enviable infinite energy." Wang Shui smiled and began to fill half a pot of water into the iron pot, then put in saltpeter and began to heat it.

It is impossible to judge the purity of saltpeter, and it is not known if SAO will add some impurities to it, so to be on the safe side, Aqua regia is ready to recrystallize twice.

After dissolving a few pieces of saltpeter by heating, the resulting solution is very clear, which is much less troublesome than nitrate leaching. Aqua regia continues to add saltpeter to the pot until the solution has a sticky feeling, and white crystals precipitate out after slightly lowering the temperature, at this time directly filter with a cotton cloth.

Aqua regia did not wash or filter much, because after he cut off one piece of cotton cloth, he lit it with a flint, and the strip of cotton cloth burned very quickly like a lit fuse.

It shows that most of the filtered crystals are potassium nitrate, which can be directly cooled and crystallized. After that, the output is naturally very high, after all, the ore thrown into Aqua regia is very pure and extremely large.

Next to Shino, he used a small stove to burn a thick stone slab that had been erected, carefully controlling the slate to keep it in a slightly hot state, and the recrystallized saltpeter should be baked here, and not only should the fire be stopped for a while, but also the state of the saltpeter.

After drying, the saltpeter should also be ground finely, and then it is time to start blending.

Speaking of which, mechanical scales used to weigh heavy goods are not available in the store, and Wang Shui spent a lot of money to buy their old scales because he was more familiar with the blacksmith shop NPC on the first floor.

Since you have spent time and effort to do it, don't be too petty.

In the first step, the same finely ground sulfur is added to the charcoal powder, and the cake is shaken and kneaded thoroughly with a fine sieve, and the possible lumps are sieved away. The ingredients are baked well and pure, so there are no lumps.

After that, potassium nitrate and dried white sugar are added and stirred thoroughly, and the process is carried out in dry wooden barrels.

Then, add water in a dough way, mix slowly and soak slowly, stir carefully to make it puree, and then transfer it to a warm slate to bake, but the open flame must be stopped, the water will greatly affect the effect, but you have to be careful during the baking process.

The mud of the mixture is relatively viscous, and when it is slightly dried, Aqua regia brings a wooden porous sieve, and the size of the hole is the uniform size of a fine drill, and the diameter is about 1 mm by eye.

Put the medicine mud into a porous sieve, then gently squeeze it with a mallet to let it emerge a little, and then scrape off the outcropping medicine with a wood chip to form a flat cake-like small granules.

During the granulation of aqua regia, Shi Nai had already re-burned a concave slab in another room, and when the temperature had cooled down a bit, aqua regia poured small black particles into a small wooden bucket and gently turned it to dry it with a wooden shovel.

No way, there is no professional drying equipment, and I am not in the mood to wait for it to dry, the amount is small and the space is large, but it is not too dangerous.

The above process is constantly going on, and in the first batch of black medicine that has been dried, Wang Shui has a little bit of it and puts it on paper, and then takes it outside to ignite.

The black medicine erupted with a bright red and white light, dazzling and fast, and the thick paper underneath was only a little charred at first, but the residual heat still made it burn with it.

The good news is that there are very few impurities after combustion, but there is quite a lot of white smoke rising, and Shino's eyes are full of excitement.

I was busy until late at night, and the two people who made it added materials many times, but I didn't expect that the first material to be exhausted was charcoal.

The final results were piled up in five huge sealed glass jars, yes, the glass jars, very clean, thick and super large, Wang Shui was speechless at the mysterious technology tree of this world.

At three o'clock in the morning, the two sat across from each other in the dining room, with a few copper shells sealed at the bottom and a few steel-tipped bulletheads on the table.

"How complete can we be now? Is it possible to build a gun? Shino's tone was not very eager.

"Now? 50% of it. As he spoke, Wang Shui took out a few drawings, with simple lines drawn on them, and the appearance looked like a vice, Wang Shui pointed to the drawings and said,

"Lever vices, blacksmiths have something like that, they say they made it themselves, so I made one. In addition, the shells were also pressed out by borrowing their waterwheel power press, and I brought back the custom-made molds, and we may need a fixed site in the future. ”

At this time, Wang Shui paused - he received a text message, and after carefully reading the short content above, Wang Shui first replied to the message, and then confirmed the reply, before continuing to say to Shi Nai:

"With that, the completion is 60%, and the final step can be troublesome, don't rush."

Shino wanted to say something else, but her mind was a little confused, and she kept her excitement going, and now she was idle and sleepy.

"Let's go rest first, the market has been very hot recently, and the demand for strengthening equipment is inexplicably high, and the wasp poison needle needs to be processed in batches, so I won't level up first. I'll finish writing today's lab notes before going to sleep. ”

Shino nodded in a daze and swayed back to her room.

Wang Shui took out a pen and paper, and began to quickly write today's observation records on the dining table, there is no professional test and measurement equipment, weighing data is also very important, the five batches of black medicine he made seem to be about the same, in fact, the formula is somewhat fine-tuned, these records are the basis for the control effect in the future.

Ten minutes, of course, Wang Shui didn't finish writing, he was just stuck in the time of ten minutes, and he guessed that Shi Nai was probably asleep now.

Wang Shui was still wearing home clothes, but he changed into a long coat for going out, and he put away the materials and pushed the door out.

At night, the village of Talan was dark and unusually quiet, the village was built in a hollowed-out mountain, and Wang Shui's rented house was on the outskirts of the village, closer to the edge of the second floor, so they could see half of the night sky.

The stars are shining.

Wang Shui walked out of the village without hurry, and came to a large rock in the middle of nowhere, where he felt the breeze to help soothe his spirits.

"Is that where you picked?" A low, flat male voice came from the side, and Wang Shui couldn't help but look at the person.

He was wearing black trousers and a white shirt that was out of place in this world, covered with a thick white coat, his short brown hair looked very casual, and his appearance was even more ordinary, like a weak office worker.

"What a great lab coat, all I remember are thin chemical fiber products, which are obstructive and uncomfortable."

"Is that what you're trying to say?" The middle-aged man glowed faintly like a ghost and continued to ask questions.

"It's just a little emotional, I'm actually being targeted by you again, are you ready to give me any reward this time? Or is it just forbidden me to make guns? ”

Wang Shui's eyes were fixed on Akihiko Kayaba, and he took the initiative to hide his true emotions, and he guessed that the man in front of him would not be boring enough to learn conversation skills.

Kayaba Jingyan just glanced at Wang Shui, and then looked away without any abnormality, and said:

"What caught my attention was the rapid increase in the level of you and your teammates, although it is indeed an exaggeration, but this method is an old setting, but after SAO was officially operated, the world became a hundred times larger, and under the maintenance of [Autonomous Intelligent AI], the number of wasps was abnormal."

"But these are still within the controllable range, the wasps didn't cause too many additional casualties, and the method of using toxins to farm insect monsters will become very bad in the future, probably because the monster's blood volume will become much higher, and there will be an increase in abnormal resistance."

The latter sentence is an addition to Wang Shui, but his clever way of showing off did not get any feedback from Kayaba Jinghiko.

"Yes, so you can still farm Vespas, you can accumulate money, you can help a lot of players accumulate weapon enhancement levels, but you can't continue to complete that attempt."

Why! Wang Shui wanted to ask out loud with such enthusiasm, and then persuade Kayaba Jingyan with his mouth cannon like the protagonist of a hot-blooded comic.

But he's not that kind of person, and Kayaba isn't that kind of villain.

"Just now, I thought I could convince you, I thought you were the kind I imagined, created this world for hobbies and interests, wanted to watch it grow, watch history happen and deduce, I thought you would be a little emotional, but I seem to have guessed wrong, you are still a rational researcher, you don't want your experiment to be unexpected, heh, there seems to be no difference between an idealistic madman and a rational scientific madman?"

"You seem to want to provoke me? It won't do you any good. ”

"Yes, great creator god, you trapped me here with death and let you observe at will, and how much do you want me to think of you? I used to have a lot of bosses, some of them made me work hard, some made me work hard, that is, they didn't stand in front of me, and if they were standing here like you, I would curse them to death in my heart. ”

"You seem to be only 14 years old?" Kihiko Kayaba suddenly digressed.

"Wow, you're peeping at me, figuratively, just figuratively, I'm just, very unwilling, I'm already trying to get stronger, and then I just suddenly found something I'm interested in, and I want to work hard, I'm just for fun! That's all, why from childhood to adulthood, you so-called adults, just want to stop me from playing! Prevent me from doing something of interest! What about you! Kayaba, aren't you also playing! Use the lives of more than 200,000 people as materials to play! ”

The Kayak was silent for a while before he said:

"I can't refute it, but I can't empathize with it, but I can roughly understand what you mean."

"Thank you so much for understanding that, after all, you are the creator of this world, you are a genius. I just want to do some more of my own creation in the world you have created, I just want a piece of the pie, and even bring more possibilities to your world, but you still want to kill me. ”

Wang Shui entered his true emotions as he spoke, he is now like making a mod for a game, but the author of the game doesn't like it, so he is going to be blocked.

"Anyway, the appearance of thermal weapons here is not just a change in the style of the world......"

"Are you worried that the heavy firepower will cause the Raiders boss to become child's play? Don't worry, probably no one in the world knows that level about firearms, and automatic fire and large-caliber weapons are not so random to build. ”

In the face of Wang Shui's defense, Kayaba Jingyan waved his finger, and a two-meter-tall huge metal tower pillar fell heavily to the ground, and Wang Shui instantly broke out in a cold sweat.

"Well, listen to me."

Kayaba Jinghiko said lightly: "I wouldn't have gone through the specific data of any player, nor would I record a video of a certain player, although it seems a bit contrived, I still have to explain my position, I am the creator and controller of the world, but not the owner of your soul." ”

"What do you mean?"

"I mean – you're so creative. So I checked your data, and in the normal data, I found this thing. Although I don't understand chemical engineering, but now the Internet is very developed, and you can find similar results just by pictures, a lead room with a reduced ratio, are you going to engage in an industrial revolution in my world? ”

"Of course not!" Leave the problem alone, deny it first. "I'm still in the same position, my teammates and I just like guns, and some basic chemicals are missing, so I have to do it myself, if you provide thick acid, why would I bother to do this?"

Okay, throw the pot back first.

On the surface, Wang Shui was still struggling to quibble, but what Kayaba Jinghiko didn't know was that Wang Shui had already won and was already happy enough to ascend to heaven.

A few minutes ago, I received a message from Kayaba Jinghiko, Wang Shui almost died of cardiac arrest at that time, of course he was not afraid of Kayaba looking for guns, anyway, they are all things in your world, anyway, Wang Shui is just playing with tickets to make guns, and if it is sealed, it will be sealed.

Wang Shui's weakest heart is his BUG-like skill bar......

Then Kayaba Jinghiko said that Wang Shui's data is normal - good, stable, although Wang Shui doesn't know why the data is normal, just like he doesn't know why the helmet made by Kayaba can make people completely stealth, but it doesn't matter, it doesn't affect his ability to protect himself.

Wang Shui was very happy, but the grass field was quiet, and he seemed to be stopped by Wang Shui's request to provide a thick acid.

What is he hesitating about? You don't really want to provide industrial products, do you? No......

"Wait, Brother Kayaba, I have a very bold guess, a lot of the output in your world is refreshed, and many industrial products are directly stuffed in, and then your world is managed and maintained by [Autonomic Intelligent AI]...... Isn't it going to complete the output setting and start to lead the industrial revolution?! ”

Then in Wang Shui's shocked gaze, the embarrassed old brother Kayaba Jinghiko nodded.