I formed the strongest swordsman group

——I am really stupid! Such a simple truth, why have I never thought of it?

A self-deprecating smile appeared on Qingdeng's lips.

This is probably the so-called "darkness under the light".

Clothes, cosmetics and jewelry - they are indeed to women what fertilizer is to crops - although crops can grow normally without fertilizer, they will not grow strong enough.

However, apart from these three, there is one thing that is essential for women.

That's the mirror!

How can you try on clothes without a mirror?

How do you do your makeup without a mirror?

How can you wear jewelry without a mirror?

At this thought, the self-deprecating look on Qingdeng's face became even more intense, and he laughed at himself again: Why didn't I think of that?

He had been competing with clothes, cosmetics and jewelry before, and his thoughts were spinning in dead ends. It was not until he saw Ziyang's silver mirror that he suddenly noticed this inconspicuous "golden mountain"!

Bronze mirrors are still widely used in RB nowadays.

The so-called bronze mirror, as the name suggests, is a mirror made of copper with a high tin content and carefully polished.

With such a material and such a production method, you definitely don’t have to count on its clarity.

Although it can illuminate objects, it can only reach the level of "being able to distinguish between humans and gorillas", and it is impossible to see specific details clearly.

Therefore, compared to the bronze mirror, the silver mirror is basically a dimensionality reduction attack!

Whether it is clarity or beauty, silver mirrors surpass bronze mirrors by countless streets.

After Liebig discovered the "silver mirror reaction", silver mirrors began to become popular in Western countries.

Although silver mirrors are quite common in the West today, they are still a very valuable rarity in RB, which has not yet lit up the "mirror-making technology" technology tree.

After the founding of the People's Republic of China, some Western businessmen saw this business opportunity and shipped ship after ship of silver mirrors to the Republic of China.

However, because silver mirrors are fragile, it is difficult to preserve them. Coupled with the cost of shipping across the ocean, when the silver mirrors landed on RB Island, the price was sky-high!

In addition, the intensifying Zhengxing movement has further raised its price.

Regardless of other places, in the Gyeonggi area, which has become the forefront of the Zunban movement, Zunban patriots are hunting "national traitors" everywhere.

Any businessman who sells Western goods will be labeled as a "national traitor" by them. At worst, his shop will be smashed, and at worst, he will lose his head.

For this reason, in the entire Gyeonggi area, it is difficult to put products with Western labels on the shelves openly.

To be fair, from this aspect, the anti-imperialist movement has certain positive significance.

The strong resistance of patriots to Western goods invisibly increased the cost of selling silver mirrors.

So, just as Ziyang said today, if her Western silver mirror, which is less than the size of a palm, is sold in the market, it will definitely sell for a high price of 30 to 40 taels of gold.

Needless to say... silver mirrors hide huge commercial potential! At the same time, it is still a “blue ocean industry” that no one has entered!

No woman can resist a beautiful and clear mirror.

A mirror is not a necessity of life that cannot be lived without.

Its attributes dictate that only the middle and upper classes who are free from the pressure of survival have the need to use mirrors...and this is exactly what Qingdeng wants!

Making money from the poor is not what Qingden wants.

Due to layers of exploitation by the government and local gentry, the people at the bottom of today's RB have long been impoverished. The frequent peasant uprisings in recent years are the best evidence of this.

Making money from them is like scraping oil on a stone. No matter how hard you try, you can't scrape out a few ounces of oil.

Whoever has money gets it!

Looking around the entire Gyeonggi Province, the most indispensable thing is the rich.

Especially Osaka!

Osaka, which enjoys the reputation of "the kitchen of the world" and "the commercial capital", has gathered many wealthy people.

If you want to make money, make money from them!

The mirror is actually the most ideal product that meets Qingdeng's wishes.

If silver mirrors can be mass-produced, there is no doubt that he will monopolize the mirror industry in RB!

From now on, will the Shinsengumi's military spending still be a problem?

By then, he may even have money to build warships!

The method of making a silver mirror...or the difficulty of the "silver mirror reaction" is at the level of a "middle school chemistry experiment".

In modern times, you can find all the materials required for the experiment and easily complete the experiment in any chemistry practice room in a key middle school.

It's just that the chemistry knowledge in middle school... to Qingdeng, is an ancient memory buried deep in the brain...

Fortunately, Qingdeng had always been a top student with excellent grades in his previous life.

Don’t underestimate the value of top students!

Although the specific details were blurred, he still remembered the general content and important parts clearly.

Another lucky thing is that the four chemicals needed to make silver mirrors-glucose, sodium hydroxide, ammonium hydroxide solution, and silver nitrate-can be produced from civilian products that can be found everywhere.

After saying goodbye to Ziyang, Qingto led Mai Kinoshita to most of the markets in Kyoto and Fushimi, and finally bought all the required materials and equipment.

Glucose is made from the starch contained in corn and potatoes. At 100 degrees, dilute hydrochloric acid with a concentration of 0.25%-0.5% is used to hydrolyze the starch contained in corn and potatoes to generate an aqueous solution of glucose. After concentration, glucose crystals can be obtained.

After the opening of the country, corn and potatoes have appeared in the vegetable markets of major cities and towns in RB, so these two vegetables are not difficult to buy.

Sodium hydroxide [NaOH] is commonly known as "fire alkali". As early as ancient times, there was an indigenous method of making caustic soda. The component of hydrated lime used in building houses is calcium hydroxide [Ca(OH)]. Mix it with a solution of soda ash [Na2CO3], filter out the solid, and then evaporate and purify it to obtain caustic soda.

Ammonium hydroxide [NH3·H2O] solution is ammonia water. Add alkali to urine, heat the reaction to generate ammonia gas, and then dissolve it in water to produce ammonia water.

As for silver nitrate, you need to use carbonized saltpeter. First, carbonize saltpeter to obtain nitric acid. After making the nitric acid, immediately put it into silverware to make silver nitrate.

Theoretically, as long as the procedures are correct and the hands and feet are deft, a silver mirror can be made in just half an hour!

Of course, the above is always theory.

No matter how beautiful the theory is, it is still false.

If you want to implement these theories into real gold and silver mountains, you still have to rely on your own hands to gradually explore!

"call……"

Qingdeng let out a long breath, then took out the cuff band from his arms with firm eyes and tied his sleeves tightly.

"let's go!"

He lit the candle and buried himself in front of the case.

The "ding ding dong dong" sound of bottles and jars being knocked kept ringing.

…

…

About 2 hours later——

"Damn it! Not enough urine!"

Qingden lay on the ground in the "orz" position.

The first experimental goal he chose was to prepare ammonia.

Unexpectedly, I hit a snag just after I started.

Making ammonia requires urine.

This material should be the easiest to obtain, and Qingdeng can directly obtain it for his own use.

However, perhaps it was because the equipment was not sophisticated enough - it was difficult to buy professional experimental equipment such as test tubes and droppers, so I had to make do with pots and pans - I worked hard for a while, but the result was still the same. Ended in failure.

Not only did he fail to produce ammonia, but he also used up all the urine he had finally saved.

Although regrettable, the experiment must continue.

Qingdeng stood up and muttered:

"Gotta find new urine..."

After muttering like this, familiar faces passed through his mind.

Kondo Isamu, Hijikata Toshizo, Nagakura Shinpachi, Saito Ichi, Inoue Genzaburo...

Just after recalling 5 faces, he felt as if he had a nightmare, his face turned pale and his body trembled violently.

It's not that he dislikes his brothers...but...but...he really doesn't want to come into contact with these people's urine!

"Since you don't want to ask them to do anything, then you can only..."

Qingden fell silent in the middle of his murmur, with an indescribable strange emotion flowing between his brows.

The candlelight hit his body, drawing out a long, faint, and deep figure...

…

…

The next day——

In the third year of Wenjiu (1863), early morning on February 25th——

Kyoto, Mibu-go, Shinsengumi's headquarters——

"Hahaha~~~!"

Souji let out a big yawn.

I saw her half-closed sleepy eyes, her body swaying, walking in a "Z" shape, like a drunken drunkard.

This is her old problem - "waking up" is very serious.

Suddenly, she heard a "bang" sound... Because the path she was traveling was swinging violently, her head accidentally hit the wall of the corridor.

Judging from the volume, the intensity is quite strong.

However, she only rubbed the affected area a few times, then acted as if nothing was wrong, and then continued to drift towards the toilet like a wandering spirit.

At this time, Qingdeng's voice suddenly sounded from behind him.

"Xiao Si."

"Hmm...? Oh...it's Ji-kun (Tangerine-kun)...Zhao-ya (good morning)..."

Her speech was slurred because she had not fully regained her consciousness.

"Xiao Si, do you want to relieve yourself now?"

"..."

"..."

The sudden burst of questioning caused the other person to suddenly open his eyes wide, and his eyes suddenly became much clearer.

"Yes, I'm just about to relieve myself... Mr. Tachibana, why are you asking this? Do you have any important things that take up your time that you need to entrust to me now?"

"Well... I do have a very important thing to ask you, but it doesn't cost you any time. It's a small thing that you can do easily when you relieve yourself. It's just... how should I put it..."

Qingdeng hesitated and looked away.

He has never been an indecisive or procrastinating person.

Therefore, after only hesitating for a moment, he took a deep breath and said quickly:

"Xiao Si, can you give me your urine?"

"..."

"..."

Silence fell between Aonto and Souji.

At this moment, it seemed that even the sound of ants walking on the ground became as loud as thunder.

After about five seconds, the shock turned into sound.

"...Tachibana-kun, is your head okay?"

Souji's eyes seemed to see something bad.

The remaining sleepiness in his consciousness completely dissipated.

She reached out her palm and touched Qingdeng's forehead.

"I don't have a fever... What are you talking about so early in the morning?"

"I'm not sick, and I'm not mad. I'm serious."

"You still said you didn't have epilepsy? Aren't you seriously ill?"

"As I said, I'm not crazy. Xiaoji, I...no, the Shinsengumi needs your urine."

"Why are your words getting more and more outrageous! Okay, let me ask you, what do you want my urine for?"

"make money."

"How am I going to make money from my urine?!"

After roaring, the frantic Souji blushed and stretched out his hand to tighten his belt.

"This matter is confidential and cannot be disclosed to anyone yet. In short, I really need your urine now!"

After saying that, Qingden stretched out his hands and grabbed the Souji's shoulders with a serious and sincere expression.

Looking at the other party's expression, the girl's expression wavered.

However, with just a snap of his fingers, his rationality regained its high ground.

"Go, go away! Do you think I'm easy to talk to, so no matter how outrageous your request is, I will obediently agree to it?"

The general secretary tightened his belt tightly, so hard that even his joints turned white.

"All in all, I will never give you my...my...this or anything of mine!"

…

…

Ten days later——

Wenjiu three years (1863), March 10——

Kyoto, somewhere——

"Hey, do you think Mr. Tachibana is acting strange lately?"

Harada Sanosuke spoke to Nagakura Shinpachi beside him.

Nagakura Shinpachi nodded and said:

"Well, it's definitely a little weird."

Five days ago, the Shinsengumi officially started "daily patrols."

Every day, at least three squads patrol the streets to arrest or kill lawbreakers and suspicious persons.

In the eyes of the Shinsengumi team members, the days of patrolling the streets are undoubtedly like holidays - only when patrolling the streets, training is not required.

The teams responsible for patrolling today are Nagakura Shinpachi's Second Division, Inoue Genzaburo's Sixth Division, and Harada Sanosuke's Tenth Division.

As soon as the sky turned white, the three of them led their respective teams and bravely stepped out of the gate of the station.

The great achievement of "annihilating the Kusunoki group overnight" greatly increased the prestige of the Shinsengumi in Kyoto.

Although it is not enough to deter the major forces such as Satsuma and Choshu, the little fish and shrimps definitely no longer dare to blatantly cause chaos, and the public security environment in Kyoto has greatly improved.

In contrast, the daily patrols of the Shinsengumi have turned into dull "armed parades."

I could spend a whole day wandering the streets of Kyoto without encountering a decent case or a noteworthy suspicious person.

In order to pass the boring time, the three of them started chatting.

Harada Sanosuke: "Mr. Tachibana has been shutting himself in his room recently, and he is making noises about what he is doing. Uncle Gen, is there any inside information that you can share?"

Genzaburo Inoue smiled bitterly.

"I'm not sure either... I'm also very concerned about Tachibana-kun's recent weird behavior, so just two days ago, I went to the director and asked her about it, but she also said she didn't know."

Before he finished speaking, he paused as if he remembered something.

"Speaking of which... Souji has been acting strange lately."

His words immediately attracted the attention of Nagakura Shinpachi and Harada Sanosuke:

The two asked in unison:

"Oh? What happened to him?"*2

"Recently, I have always seen her secretly handing Qingdeng a porcelain pot containing something unknown. When handing over the pot, she acted like a thief, looking left and right. His expression was still very stiff, as if he was going to the execution ground."

*******

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After Baobaozi’s unremitting efforts, we finally succeeded in improving today’s update time! (Crying leopard head.jpg)

PS: After writing this chapter, Bao Baozi couldn't help but ask himself: Am I still in my right mind when I write such an outrageous plot?

After learning that "the preparation of ammonia requires the use of urine", he was able to quickly come up with such an outrageous plot... Bao Baozi is indeed a genius! (Baohan.jpg)

Thanks to book friends [AkiyamaTsuki] and [Sniper No. 11]!

The science content in this chapter is all copied by me...ah, no, I borrowed from these two people's comments.

At the same time, I would also like to thank my book friend [Heavenly Blade Messenger V]!

Thanks to the information and advice he provided, I was able to come up with the idea of ​​“getting rich with mirrors”!