After a pause, Li Ziyuan looked at Guo Laosan in front of him, and said calmly: "You talked to me about this matter today, to be honest, I am really happy, because you really regard me as your friend." Brother Guo, the past is over, don't mention it in the future. What you said today is known to God, you know and I know. Even Xiaoshan, don't tell her. ”

"Xiaoshan's mind is as pure as a pool of clear spring water, and I don't want anything bad to be contaminated. Since you have never mentioned it in front of him before, I hope you will not let her know about it in the future. Moreover, Xiaoshan's 'sexual' personality belongs to the kind of child who is strong on the outside but fragile on the inside, and this incident can easily have a great impact on her mentality. ”

"As for the rest, I don't want to make any big senses. Brother Guo, when you left the career of a horse bandit, didn't you just want to give your wife and children a peaceful life? But think about it, will the little devil come to China to burn, kill and rob, will it make your peaceful life continue, and can you let Xiaoshan live a peaceful life? ”

"If it weren't for the Japanese invasion, Xiaoshan would not be in the army, but would have continued to study in the classroom. With Xiaoshan's qualifications, he may be admitted to a good university in the future, and he may even go abroad for further study. But now I can't even put down a calm desk, let alone a peaceful life. ”

"Hundreds of thousands of compatriots who were killed by devils in Nanjing in 37 years, do they have guns in their hands? The hundreds of people in Wangjiagou, do they have guns in their hands? Who of them wants to live under the fire of war and live a precarious life? Who wants their children to live under the sound of gunfire or even fleeing? ”

"Are they demanding? But did the devils let them live a peaceful life because they didn't have weapons in their hands? Devils don't need a reason to kill people. Brother, if you don't get rid of the little devils, your peaceful life is just a bubble that will be broken at any time. Your brother Guo's ability, do you really want the devil's butcher's knife to be put on your neck before you come out to resist? ”

"We don't put down the guns in our hands, not only for ourselves not to be enslaved, but also for our descendants like Xiaoshanzi, who will not suffer the hardships we have now, so that they can live the peaceful life you fantasize about. Brother Guo, I hope you can take out all the skills you have and help us fight devils together. ”

"As for what the future holds, who can say for sure? Brother Guo, your ability, are you really willing to sit idly by when this national crisis is at hand? Brother, this is not for me, but for Xiaoshan and his descendants to live under the sky of freedom and live a truly peaceful life. Their lives don't have to be interrupted by guns. ”

After Li Ziyuan said this, Guo Laosan was silent for a long time but didn't say anything. just nodded faintly, indicating that he listened. Regarding Guo Laosan's silence as always, Li Ziyuan just smiled and didn't say anything. He knew what he was saying, and the person in front of him really listened to it.

After today's conversation, Li Ziyuan, who knew that he had completely opened the knot in Guo Laosan's heart, understood that he could already achieve the most fundamental, even the most bottomless trust in Guo Laosan. With today's conversation, Li Ziyuan believes that this person will not be mindful.

With Guo Laosan's help, Li Ziyuan can be regarded as a powerful helper in preparing gunpowder and making mines by himself. At least you don't have to do everything, you have to do it yourself. Guo Laosan's assistance made him feel like he would get twice the result with half the effort.

And now the wounded have basically healed, and there is basically nothing to do. In addition to teaching the soldiers some battlefield self-help knowledge, it is to take Guo Xiaoshan to run all over the mountains, collect Chinese 'medicine' and engage in some game to improve their lives. also participated from time to time, using the chemical knowledge he learned in Xiehe to help Li Ziyuan.

It's just that Li Ziyuan's sister has a really limited grasp of chemistry. Although the 'medicine' used by Western medicine at this time was basically derived from chemical products. But a doctor does not mean that at the same time a qualified chemist. Although Li Ziyun can help a certain amount in this regard, this help is also very limited.

And Li Ziyuan also knows that not to mention this kind of local refining chemical products that lacks the most basic protection measures, even a chemical plant with such a sound system in his previous life will produce some harmful toxins to the human body. Li Ziyuan didn't want to bring any kind of trouble to his sister's body. Therefore, Li Ziyuan still mainly relies on himself.

In particular, the use of 'urine' liquid to boil white phosphorus, and the soil method to boil potassium nitrate and sulfur, the most uncomfortable and painful, and quite dangerous things, Li Ziyuan can only do by himself. Li Ziyuan, who was worried that his inferior process would produce toxic gases and bring physical harm to the people of Li Jiawa, was desperate to find a suitable production site.

The ignition point of white phosphorus is low, and the smell is not good when it is added to the 'urine', and the taste is even worse when heated. After Li Ziyuan searched for it several times, he could only choose the place where the white phosphorus was boiled in a 'yin' place that was a certain distance away from Lijiawa and close to a mountain stream. Before boiling, Li Ziyuan personally led the soldiers to build a small embankment with river pebbles and sediment on the stream.

There is no way to have a low ignition point of white phosphorus, and if you don't choose a place that can cool down quickly, you won't be able to get out of white phosphorus, and it will burn out by itself before it is used. And Li Ziyuan still wants to see if he can make some nitric acid and sulfuric acid to make a more powerful ammonium nitrate explosive 'medicine'. This requires the ability to cool down in a short period of time, so choosing the edge of the mountain stream is the best choice.

After Li Ziyuan turned this stream into a small pond, he began to boil white phosphorus. Li Ziyuan took the vat Chang Juan bought and managed to drill an eye. Install a thin piece of wood with a red soldering iron in the middle to burn a round hole, and make a pipe to collect water vapor.

Then the large vat is piled with river sand, charcoal and an appropriate amount of millet, and the 'urine' liquid is poured into it and sealed and heated. After water cooling, the required white phosphorus is obtained. It's just that this method is also Li Ziyuan's previous life. A chemistry book that he got by chance was to be precise, describing what he saw in the books of ancient Western alchemists, and as for the actual 'manipulation', it was the first time he had done it.

In addition to the fact that the smell of ammonia volatilized by the 'urine' liquid is really unacceptable. Li Ziyuan, who was '' for the first time, also lost a lot of raw materials because of his poor technology. Although I can't say how much or how much I need for this 'urine' thing, the source of raw materials is relatively sufficient.

After losing a lot of raw materials, Li Ziyuan, who summed up his experience and made persistent efforts, finally made some white phosphorus. However, the price is not only that everyone is desperately drinking water to raise raw materials for Li Ziyuan to boil white phosphorus. Even though Li Ziyuan himself brought a mask that Li Ziyun used a 'wool' towel to temporarily remake for him, he was also smoked because he was dizzy and didn't want to eat for a few days. At this time, Li Ziyuan knew that it was easy to say that it was easy to do it yourself, but it was really not easy to do.

In the end, in order to solve the poison gas pollution, Li Ziyuan could only reluctantly bring the captured Japanese army gas mask, which made him feel better. It's just that although this method finally extracts the much-needed white phosphorus, the consumption of raw materials is too great. It often takes a long time to accumulate 'urine' liquid in order to boil out a little bit of white phosphorus.

While boiling white phosphorus, Li Ziyuan also used the collected nitrate and plant ash to boil nitrate. All of a sudden, under Chang Juan's mobilization, the entire second district was digging up the soil at the foot of the old house, especially the soil of the urinating places and the pigs and cattle pens. Guo Laosan also took a few soldiers and traveled all over the mountains to find mountain 'caves' and nitrate.

As for the source of sulfur, it has also been solved with Guo Laosan's efforts. Of course, there is no local natural sulfur in the southeast of Shanxi, and it is too far away from Datong. But Guo Laosan found pyrite, the main raw material for industrial sulfur production, in the mountainous area to the south, close to Huguan. Although it is a little more difficult than natural sulfur ore, it finally solves some of the raw material problems.

Although most of the Chinese folk soil method of boiling sulfuric acid and nitric acid has been lost with the development of modern chemical industry, Guo Laosan has some skills in boiling nitrate. After the problem of raw materials was roughly solved, Guo Laosan took over the work of boiling nitrate.

Even though I haven't studied it systematically, I don't even know what chemistry is. However, relying on many years of horse bandit career, he prepared his own black fire 'medicine', as an earthen gun and earthen cannon to 'shoot' and 'medicine'. When Guo Laosan was boiling nitrate, his skills were much more proficient than Li Ziyuan, who was a beginner.

As soon as Guo Laosan got started, Li Ziyuan saw that this old man's method of boiling nitrate, he was definitely an expert in this area. After thinking about it, Li Ziyuan was not surprised. This guy comes from a family of horse bandits, and for horse bandits, a standard rifle is very expensive, and the price of bullets is not cheap.

Arming all the bandits with standard firearms alone is too expensive for any armed bandits. Especially for a poor and backward place like Suixi. In his team of horse bandits, steel guns should only have backbones. As for those pony bandits, they still mainly use black fire 'medicine' as a musket for firing 'fire' and 'medicine', and even fire guns.

Since there are a large number of muskets, it is inevitable to prepare their own black fire 'medicine'. The best formula for black fire 'medicine' is based on nitrate, and it is strange if you are not skilled in boiling nitrate. Moreover, Li Ziyuan found that Guo Laosan not only boiled nitrate, but also boiled potassium nitrate with a high purity.

Guo Laosan took over the boiling nitrate, and Li Ziyuan was dual-purpose. While using the collected 'urine' liquid, he boiled as much white phosphorus as possible using the soil method. While using pyrite found in the mountains to the south, he began to 'make' sulfur by soil method. On the one hand, Li Ziyuan kept desperately recalling the chemical knowledge he had learned in his previous life, and on the other hand, he kept repeating experiments.

Although it is limited by raw materials and site, the key is that it can only be equipped with large tanks and clay pots, and the manufacturing of Li Ziyuan's earth-fire 'medicine' is slow. But fortunately, after repeated experiments, Li Ziyuan still got the black fire 'medicine'. Moreover, among the black fire 'medicine' he made, because the potassium nitrate in it was more pure, the power was much greater than that of ordinary black fire 'medicine'.

The black fire 'medicine' that Li Ziyuan made was a method recorded in a book he had read in his previous life. There is a modified method for making black fire 'medicine' on it. After Guo Laosan made potassium nitrate with relatively high purity, Li Ziyuan put a large pot on the fire and kept stir-frying carefully.

Until the white potassium nitrate is fried into a yellow color, add sulfur and pine charcoal to stir. After carefully grinding it into a fine powder with a stone mill, add 3% of the batter and stir it, put it in the stone scoop and beat it continuously with a mallet. Until it turns blue-gray 'color', it is then sifted into the size of a grain of rice with a sieve, and it becomes a granular black fire 'medicine'.