Space Food Storage: Daily Travel

Liu Yuhan orally described the methods of extracting fine salt from coarse salt, making ice from saltpeter, and making gunpowder from saltpeter.

Liu Zhiyuan recorded it in three parts.

Huo Dong listened from the side and asked questions whenever he had any questions. He already knew the methods of extracting crude salt and making ice.

It’s this gunpowder recipe that’s so shocking!

He was a soldier. If it could really be made as Liu Yuhan said, and if it turned out to be so powerful after testing, it would truly be a super-powerful weapon that would shock the Central Plains!

He could submit the extracted crude salt and high-yield corn varieties to the court in exchange for amnesty for the Liu family.

Since he didn't meet a good monarch, he didn't want to give too much at once, otherwise the Liu family might not get pardon but fear.

He would reserve the ice-making method for now. This kind of method that could create huge profits was so needed by Fu'an City and the Huo Family Army! Of course, this profit group also included the Liu Family and the Liu Family.

He needs to think carefully about how to proceed.

Regardless of whether the recipe for gunpowder can be developed in the end, he will never tell it to others easily.

Even the secret recipe cannot be revealed to the imperial court. If it is known to others, this little girl, the Liu family, and the Huo family will never have peace!

How many people would be afraid of such a weapon? Would many forces want to take possession of it?

Liu Yuhan talked to his grandfather privately, and his grandfather affirmed the character of the Huo family.

He praised Huo Dong highly and said that he was a trustworthy person.

Liu Yuhan wrote down the method of gunpowder.

Gunpowder was not only a military weapon in ancient China, but also had a wide range of applications in many fields, such as road and bridge construction, and mineral mining.

It involves various aspects such as culture, religion, medicine and folk traditions.

To make gunpowder, first crush the materials: crush potassium nitrate, carbon powder, sulfur powder and other materials into powder of about 30 mesh.

Sulfur was also called Shiliuhuang, Liuhuang, and Liuhuang in ancient my country. Sulfur mines already existed in this dynasty.

Proportioning adhesive: Accurately weigh and mix the above powder materials according to the drug formula, and add the adhesive and stir evenly to ensure uniform mixing of various materials.

Forming: The mixed material is pressed into the desired shape, such as rods, balls, etc. Degassing is carried out at the same time.

Drying: The prepared gunpowder is dried at low or room temperature in a drying room to make it completely dry, so as to reduce the gunpowder's water absorption and unstable combustion during operation.

Precautions for gunpowder: The manufacture of gunpowder is a high-risk operation, so relevant regulations and operating procedures must be observed to ensure personal safety and production quality.

When making gunpowder, the quality of the various raw materials, the proportions of the various materials, and the manufacturing process must be strictly controlled to avoid errors and deviations. At the same time, rigorous inspection and testing must be carried out at every stage of the manufacturing process to ensure that the finished gunpowder meets the requirements for safety and effectiveness.

In addition to strictly controlling manufacturing quality, it is also necessary to pay attention to the fact that there must be no open flames and no static protection during the production process to avoid accidents.

In short, even a small flaw in the production process of gunpowder can cause an accident.

Liu Yuhan described the consequences as very serious and hoped Huo Dong would pay attention to it!

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Liu Zhiyuan gave all three copies of the prescription to Huo Dong, who carefully put them away.

He said to Liu Yuhan, "Miss Xiaohan, before these prescriptions become popular, I hope you will use them with caution. Even if you do use them, you must not let others find out, so as to avoid unnecessary trouble. Do you understand what I mean?"

"Well, I know Brother Huo Dong, I will be careful."

"Xiao Han, this is also what Grandfather meant. Being over-wise can lead to premature death. I will also instruct my family not to spread the news. Everything should be done according to what we discussed before."

"Nephew Huo, it was Uncle Liu who put pressure on you. He insisted on letting you take the lead for the sake of the Liu family. Uncle Liu really has no face to see General Huo."

"Uncle Liu, there's no need to be like this. The Huo family has always been on the cutting edge of the market. These prescriptions have provided my family and the Huo family army with great convenience and benefits. I should be grateful to you. Don't worry, I will do my best to fight for what I should fight for you."

"Brother Huo Dong, as long as you can help my grandfather's family escape exile, nothing else matters. I told you when I gave you the corn seeds that I don't care about these things, and I don't want to be the first. We are just ordinary people who just want to live a stable life. If these prescriptions can bring blessings to the people, we will also be happy to see it happen."

"Miss, you are righteous." Huo Dong bowed to her as a peer.

Liu Yuhan dodged by leaning sideways.

Alas, this boy wants to embarrass me, but I feel relieved when I think about it. Her soul is already 26 years old, and this boy is said to be only 19 years old. Putting aside their identities, she can afford him to salute her.

In a blink of an eye, Liu Yuhan and the others had been on Haiyu Island for 10 days. Tomorrow they would return with Huo Dong.

After dinner, the father, his two daughters and their two daughters sat in the courtyard, quietly listening to the instructions of their great-grandmother, grandfather and grandmother.

"Grandson-in-law, I'm relieved to have you take care of Yan Xi."

"Xiaohan, when you come of age next year, if your great-grandmother is still alive, she will naturally comb your hair for you. I also want to meet the rest of your family, your grandparents, brothers and sisters. If I can personally thank them for taking care of your mother over the years, I will have no regrets."

"Grandma will surely live a long life. I will be coming of age next year and I am looking forward to you combing my hair."

"Grandma, Father, Mother, Yan Xi will come to see you again, you must all take care of yourselves."

"Xiao Han, I won't say much else to your grandfather. Being too smart isn't necessarily a good thing. Remember to hide your shortcomings, okay?"

"I will keep in mind what my grandparents said."

"Everyone, go and rest. We have to get up early tomorrow to travel. We will meet again next time. There is no need to be sad."

"Good Grandmother"

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After breakfast, Liu Yuhan, Huo Dong and others carried the gifts sent by the Liu family and the dried prey furs back home.

This time they took Huo Dong's private wooden boat to the Haiyu Port. The wooden boat was small but quite fast.

The most primitive ancient large ships mainly relied on three sources of power for propulsion: wind power, human power, and water power.

By this dynasty, the stern rudder had developed and become increasingly perfect and mature.

Based on the vertical rudder, the hole rudder and the balanced rudder were developed. The hole rudder has diamond-shaped holes on the rudder blade to allow water on both sides of the rudder blade to flow, thus reducing the resistance when operating the rudder.

A balanced rudder is one that expands the area of the rudder blades so that they extend in front of the rudder stock, and the rudder blades before and after the rudder stock are nearly consistent, thereby making the water pressure more balanced, which can also reduce the resistance when operating the rudder.

During this dynasty, ships had already developed elevators that could be raised and lowered according to the depth of the water. When the water was deep, the rudder could be lowered to improve its efficiency; when the water was shallow, it could be raised to protect the rudder.

There were many types of ship rudders during this period, and the ancients could choose different rudders according to the needs of navigation.

Liu Yuhan once again marveled at the wisdom of the ancients.

After getting off the boat, Huo Yi pulled their previous carriage out of the inn.

By noon, they had returned to Changping County. After having a quick bite to eat at a restaurant, Huo Dong, Liu Yuhan, and the others parted ways.

The master returned to Fulai Village with Liu Yuhan. Grandma Qin, who wanted to stay on the island to look after Madam Liu and the others, was asked to return with Liu Yuhan and the others. Grandma told her to teach Liu Yuhan and the sisters about manners and behavior, based on their status.

Liu Yuhan was not opposed to this. Since she was already in this dynasty, she might as well follow the local customs. It would always be good for her and her sisters to understand more rules.

The sun sets in the Liu family courtyard.

The return of Liu Yuhan and the others surprised the family! Mrs. Li hurriedly cooked a few more dishes with the two little girls.

Xiao Si and Xiao Wu happily circled around their parents and sister, chattering about what had happened in the past few days.

They are actually still six-year-old children, and their emotions are only shown on their faces. They really miss their parents and sister so much!

Liu Yuhan listened to them quietly, answered their questions patiently, and agreed with them from time to time.

She was very relaxed and felt very comfortable in this family atmosphere.