Although natural glycerin was accidentally extracted when making soap.

But Zhu Yunfei did not immediately go to study gunpowder manufacturing. After all, his original intention was to make soap first.

Gunpowder is highly dangerous to produce and requires more financial investment.

Now Zhu Yunfei has no money, so he can only store the glycerin and continue making his soap with peace of mind.

But making soap didn't seem as simple as he imagined. He worked hard for several days without success.

On the contrary, the personal letter he wrote to his cousin Cao Bianjiao received a reply from him.

In his letter to Cao Bianjiao, he vaguely expressed his homesickness and hoped that his cousin would allow him to go home to visit relatives.

He also reminded him that after the war started, he must be careful of Wu Sangui holding him back, but he did not dare to mention Hong Chengchou.

There was no way, at this time, if he dared to say that Hong Chengchou would surrender and become a slave, not to mention Cao Bianjiao didn't believe it, Hong Chengchou himself probably didn't believe it either.

Today, Hong Chengchou has more than 100,000 soldiers of the Ming Dynasty, and he is fighting every step of the way on the Songjin battlefield. Although he did not defeat the soldiers and horses of Jiannuhuangtaiji for a while.

But there is a chance of victory for each other. As the governor of Jiliao in the Ming Dynasty and an important minister in the court, you said that Hong Chengchou would surrender and become a slave. Isn't this a slander?

But today Cao Bianjiao sent someone to send him a reply.

In his reply, Cao Bianjiao reprimanded Zhu Yunfei unceremoniously.

He said that he lacked the spirit of a man and even imitated the behavior of a woman and a child. He also warned him that if he dared to escape from the battle, he would definitely kill his relatives and catch him with his own hands and deal with him according to military law.

Moreover, he was said to be daring to act rashly and discuss private matters with the generals of the imperial court, which was a crime of disrespect...

In short, Zhu Yunfei, this cheap cousin, was very dissatisfied with his words and deeds in every word.

"You can do it for yourself..." Looking at this reply, Zhu Yunfei couldn't help but uttered a curse word: "I'm going to kill you, you don't know the heart of a good person."

"It seems that it is better to rely on yourself than to rely on anyone. I have to make explosives and save myself."

Seeing that Cao Bianjiao, his cheap cousin, could not be counted on, Zhu Yunfei had no choice but to save himself.

Since we can't escape now, we can only research a batch of gunpowder and wait until the war begins. If we have explosives in hand, not only can we defeat the slaves, but we can always escape to retreat and win more opportunities, right?

Zhu Yunfei has always been an activist. Since he wants to save himself, he has to take action, right?

On the same day, Zhu Yunfei asked Zhang Tianfu to help him prepare a batch of saltpeter, sulfur, charcoal, lime and other materials for making gunpowder.

Now he is ready to continue making soap while studying the gunpowder formula.

Fortunately, he had nothing to do in Lianshan, and the materials for making gunpowder were also available in the defense arsenal.

After all, in addition to red cannons, the Ming army also had many firearms.

For example, the three-eyed gun made by the Ming Army's Ordnance Bureau and the Franco gun made by the Portuguese were all muskets of this era.

However, these muskets did not gain people's expectations among the Ming army due to their manufacturing costs and their combat effectiveness.

As a result, it did not receive enough attention in the military.

But firearms are not uncommon among the ranks of the Ming army.

In the memory of the original owner Zhu Yunfei, there are many fragments of the use of firearms.

However, because front-loaded firearms are complicated to load and cannot be used in rainy days, they are far less popular than soft bows and long arrows, which are standard equipment of the Ming army.

But as a time traveler, Zhu Yunfei knows that although firearms are somewhat useless now, with the invention of breech-loading rifled guns, the era of firearms replacing cold weapons is no longer far away.

At least at this time in the West, the Portuguese and Spaniards are now committed to developing the reform and innovation of guns.

At Zhu Yunfei's insistence, Zhang Tianfu and Li Hu had no choice but to lead their private soldiers and follow Zhu Yunfei to work.

A few more days passed, and after countless experiments.

Although Zhu Yunfei did not research and manufacture nitroglycerin explosive.

But he made soap.

"Yunfei, this soap is really easy to use. Not only is it convenient to wash your hair, it also smells good." After using the soap made by Zhu Yunfei, Zhang Tianfu said with a look of amazement.

"You think if we take this soap to the capital and sell it, can we sell it for a hundred pence a piece?"

Zhang Tianfu is a little clever. After discovering the benefits of soap, he couldn't help but have the idea of ​​​​using it to make money.

"One hundred cents per dollar? How can anyone be willing to buy it?" Li Hu looked suspicious.

"The situation is too small. If we really want to sell this soap in the capital, it will cost at least three hundred coins."

Zhu Yunfei smiled faintly and immediately interrupted the two of them from making money.

"Now that the fighting is going on on the front lines, we definitely won't be able to go to the capital, so don't even think about selling soap."

"We have to make the explosives now, otherwise when the slaves come to kill us, we will all have to burp."

Zhu Yunfei makes soap purely to meet his daily needs.

Making money by making soap? For them now, it is obviously a fantasy.

Now they are on the front line of Songjin, doing business in this place, with the right time, place, and people, and they don't have any part in it.

Even if we want to produce soap to sell, we still have to finish the current battle and return to Datong.

"It makes sense. If you have good goods in hand, you don't have to worry about the business failing." Zhang Tianfu thought about it.

However, after discovering that Zhu Yunfei had made practical soap, he suddenly had some expectations about the power of the gunpowder created by Zhu Yunfei.

"Yunfei, are you sure you can make this explosive?"

Seeing Zhu Yunfei working in the kitchen for more than ten days without success, Zhang Tianfu asked with some uncertainty.

"Just wait with peace of mind." Zhu Yunfei smiled confidently, pointed to the soap in the clay pot, and said to Zhang Tianfu.

"Take these soaps and give them a few pieces to your brother, Wang Shou Bei, and Cao Guo Zhan. Each of them will give a few pieces."

"Yunfei, I noticed that you seem to have changed a lot since you were injured this time."

Zhang Tianfu looked at Zhu Yunfei with some surprise. In the past, Zhu Yunfei was arrogant and dissolute. With his martial arts skills and backing, he always had his eyes above his head.

Even his brother Zhang Tianlu was indifferent to him.

"How can I not enlighten myself after taking a trip to the gate of hell?" Zhu Yunfei laughed at himself and did not explain too much.

Just like when he made soap and wanted to make explosives, he just said the secret recipe he saw in an ancient book.

Making gunpowder is a dangerous thing.

No, in the next few days, Zhu Yunfei had three explosions during his experiments.

Fortunately, they were all semi-finished products, so they were not very powerful. They just shocked him and made him a little embarrassed.

"boom!"

During the last experimental loading, an accident happened again.

The loaded gunpowder suddenly exploded. Although Zhu Yunfei was on guard, he was already dizzy by the explosion, and Wufu's internal organs were churning.

He fell to the ground and rested for a while before recovering.

"Master, Master, are you okay?" Li Hu, who was outside the house, heard the explosion and rushed into the house. When he saw Zhu Yunfei lying on the ground, he was so frightened that he shouted quickly.

"Doctor, find the doctor quickly."

Zhang Tianfu, who came after hearing the news, was shocked when he saw the mess on the ground and Zhu Yunfei being picked up by Li Hu.

"Yunfei, Yunfei, please don't die."

After the two people struggled, Zhu Yunfei, who had regained his strength, said with a painful look on his face: "Can you two be quiet for a while?"

"Give me a glass of water, I'm thirsty."

"Water, pour the water quickly." Zhang Tianfu pointed at the soldiers at the door and shouted quickly.

The commotion Zhu Yunfei made in the cook's room alerted the general Zhang Tianlu, the guard Wang Zhu, the guerrilla general Cao Shiying and others.

When several people heard the explosion, they thought it was the slaves coming to kill them, and they were all shocked.

Until they learned that Zhu Yunfei was making gunpowder, everyone was dumbfounded.

"Yunfei, you've been injured for a few days, why don't you stop worrying about it?" Zhang Tianlu, who is thirty-six years old, has a square face, big ears, thick eyebrows and big eyes. He is tall and dignified.

This guy was able to defect to Cao Wenzhao as a warrior ten years ago. In more than ten years, he rose from a small pawn to his current position as a general, which shows that he is outstanding.

What Zhu Yunfei didn't know was that Zhang Tianlu was not an unknown person.

[In history, Zhang Tianlu, after Chongzhen hanged himself, led his troops to surrender to the Qing army in Jiangnan. Because of his repeated military exploits on the battlefield, he eventually became the founding general of the Qing court. 】

"Thank you Brother Tianlu for your concern. It was just a mistake today. I am confident that I can make practical gunpowder next time."

Zhu Yunfei took a sip of water and sat on the threshold, having already recovered.

"You are still so stubborn." Zhang Tianlu shook his head and said helplessly.

In Zhang Tianlu's heart, Zhu Yunfei was a naughty young man.

After all, Zhu Yunfei's predecessor was arrogant, willful, and arrogant. He spent a lot of money in a brothel and everything he did was the style of a playboy.

"Brother Tianlu, how about we make a bet?" Seeing that the other party was not optimistic about him, Zhu Yunfei did not argue, but calmly watched the other party initiate the bet.

"What kind of gambling method?" Zhang Tianlu looked at Zhu Yunfei and did not agree immediately.
To be continued...