The summer is scorching, on the east side of the Handan section of Taihang Mountain, in the middle of the Yellow Cliff Village, the grass hall is in the house.

This was originally a cottage when Dong Ping and his group were entrenched in Taihang Mountain, since the development of the iron factory in Hebei, it has become a fixed cottage of the loyal army, and Li Shishi went to Hebei and lived near here.

At this time, it was already late at night, and the fire was still revealing in the grass hall, and Wang Song was sitting at a table in front of the window, writing hard.

Everything is hastily created, and the furnishings of the room are quite simple, with a bed, a desk, and a rectangular bookshelf full of books. The blue brick floor is fairly flat, but the walls are mottled and uneven, and there are two worn-out New Year paintings pasted on them.

The choking smell of smoke came from outside the house, making Wang Song cough.

Big brother, are you alright? ”

With a squeak, Zhao Ruolan pushed the door in from the outside, she walked quickly behind Wang Song, and hurriedly whipped Wang Song on his back.

Although Wang Song has recovered from his external injuries, the injuries are too serious, and it will take some time for his body to recover. Zhao Ruolan was afraid that Wang Song would not recover well, and whether Wang Song had anyone around him, so she had been taking care of his life.

"Girl, what did you order? Why are you so choked!"

Wang Song finally stopped coughing, turned his head and asked.

"It's realgar and wormwood that repel mosquitoes, and they may have lit too much and choked you. ”

Zhao Ruolan was sweating profusely, and his face was bitten by mosquitoes and a few pimples. She said regretfully: "If it is in Tokyo City, we can buy incense, so that you will not be afraid of mosquito bites." Now that there are wars going on everywhere, it's hard to buy these things anymore. ”

"Sister, big brother, thank you!"

Wang Song said sincerely. Zhao Ruolan ran for him, and worked tirelessly, if she didn't take care of her, I'm afraid her body wouldn't have recovered so quickly.

"Sister", Zhao Ruolan's heart has already blossomed. This title was unique to her, and he had never seen Wang Song call other women like this.

Before she could reply, Wang Song involuntarily coughed again. He continued, "What is the incense you just said?"

"Big brother, the incense is duckweed, the duckweed is dry during the Dragon Boat Festival, add realgar, make paper wrapped incense, if it is burned, it can get rid of mosquitoes, and the effect is good!"

Wang Song suddenly realized, isn't this the mosquito coil of later generations! However, listening to Zhao Ruolan's description, it's just that the powder is wrapped in paper and burned, which is too inconvenient to use.

If it can be made in a spiral shape like the one in later generations, it will not only be much more convenient.

"Girl, you don't need duckweed, and you don't have to go to Tokyo City to buy it, we can do it ourselves. ”

Wang Song shook his head and said, thinking of the mosquito coils of later generations. As a graduate of chemistry, although he does not have formaldehyde, acetaldehyde, or benzene, he can also look forward to choosing some methods that know how to make them.

He quickly wrote down the recipe for the mosquito coil on a piece of paper and handed it to Zhao Ruolan.

"A mixture of rosin, wormwood, tobacco, a very small amount of sulfur, and sawdust. ”

Zhao Ruolan raised his head in surprise and asked, "Big brother, can this really work?"

"No problem!"

Wang Song nodded, and then drew a spiral shape on the paper, and even the jack hole was marked on it.

"When the time comes, you ask Lin Tianyou and them to make a mold to produce "mosquito coils", and the business will be very good at that time!"

Wang Song pointed to the mosquito net made of summer cloth hanging on his bed, and said with a smile: "If you have this mosquito coil, you won't have to hang this tent in summer, it's too hot!"

Zhao Ruolan also smiled: "If that's the case, that's great!" In the north and south of the Great Song Dynasty, if we use the mosquito coils we make, I don't know how much silver we will make!"

She laughs as delicate as a flower, and with long hands and long legs, her figure is a little thin, but very straight.

Wang Song praised: "Sister, you are so good-looking, if you are placed in the future generations, you will definitely be a supermodel, and you will be loved by those otaku." ”

Although he didn't understand the meaning of "supermodel" and "otaku" in Wang Song's words, Zhao Ruolan also knew that Wang Song was praising her for her beauty.

She couldn't help but feel overjoyed, half of her face turned red, and she asked shyly, "Big brother, do you think I'm really beautiful?"

Wang Song nodded heavily and said: "It's really beautiful, the skin is like jade, the figure is graceful, and the beauty is beautiful, graceful and luxurious." I'm sorry, big brother can't find a good word. ”

"Big brother, it's better to say "When the mountains are full of flowers, she laughs in the bushes"!"

Zhao Ruolan suddenly became emotional, and hugged Wang Song tightly from behind.

"Big brother, when I was in Henan Mansion, I fell in love with you at a glance. At that time, I was not sensible, but now more than three years have passed, and I know that I can't live without you for the rest of my life, so you want me!"

Zhao Ruolan clinged to Wang Song's back, and the two straightness on his chest made Wang Song confused. Zhao Ruolan hugged Wang Song's neck and kissed him on the face.

The girl's fragrance bursts, tenderness and sweetness, and no one disturbs the night, Wang Song has long been addicted. He hugged Zhao Ruolan, put it in his arms, hugged her tightly, and put his hands up and down.

If there was no Zhao Ruolan, he would probably have been destined for Huangquan at this moment!

The most difficult to accept the grace of beauties, is it really as Chen Blind said, relying on women all his life to turn evil into good fortune?

"Big brother, how do you say I compare with the little lady and Princess Roufu? ”

Zhao Ruolan, who was intoxicated with the gentle township, suddenly asked this sentence.

The news came that Zhiyuexiu fell into the river and died, and Zhihu and others searched all the way, but they never found her body. In the chaos of war, the specific circumstances are unknown.

As for Princess Roufu Zhao Duofu, Wang Song has broken off with Song Muen, and I am afraid there will be no intersection between the two.

Seeing that Wang Song was silent and felt that his body was a little stiff, Zhao Ruolan kissed him lightly and left his embrace.

"Big brother, I know you can't let them go!"

Zhao Ruolan came to the table, picked up a stack of papers on the table, and looked at it.

"The land of Yanyun is the life and death of China, and its momentum must be recovered, and it is what China and the rest of the world have been looking forward to for 200 years. However, if you want to strengthen yourself and regain the old things in the hands of your enemies, you must first seek self-improvement, and then you can help. The national policy of the Song Dynasty adopted the policy of Gou'an internally, so the country has always been weak, and externally it has long hoped to recover its homeland ......"

Zhao Ruolan raised his head in surprise and asked, "Big brother, what are you writing here, are you going to write a book?"

In the Song Dynasty, a large number of books were published, and there were bookstores everywhere, that is, bookstores in later generations. In order to seek fame, many literati naturally took the shortest way to publish what they knew.

"This is written for all the people of the occupied areas and the land of the two rivers. ”

Wang Song said in a deep voice: "If everyone in my Great Song Dynasty rises up to resist, how can thieves be so rampant!"

What he regretted all along was ignoring the newspaper as a powerful propaganda tool. Changing people's minds is the most powerful weapon.

In the past, he was subject to the Great Song Dynasty, but now he can finally let go of his hands and do it without worrying about constraints.

Wang Song raised his head and said to Zhao Ruolan: "Tomorrow, you send someone to find Liang Xing and ask him to come to see me, I have something important to discuss with him!"

Zhao Ruolan nodded, saw Wang Song bury his head in writing again, gently pulled the door, and quietly walked out.

After a long time, Wang Song sighed, the past should be over, why bother to take it to heart again.

Zhao Ruolan's affection for him, how could he not know.

It's just that......

He shook his head, leaned over and began to write again.

In the office of the iron factory, Lin Tianyou took a fire gun and handed it to Wang Song.

"Xianggong, this is what you want to fire, but it needs to be improved. ”

Wang Song took it with a trembling hand, looked at it carefully, and felt that the barrel was too thin.

"Xianggong is right. I'm also working on improvements, expanding the tubes, and increasing the dosage of medications. There are not many problems with bullet iron, iron stone, and powder pools, just wait for the improved new products. ”

"Have you tried it, how far can you hit, can you break the armor?"

Wang Song nodded, Lin Tianyou was already in front.

He estimated that this firearm was about four feet long, and the weight in his hand was basically suitable.

"Xianggong, this fire gun is four feet long, with a diameter of 14 mm, an outer diameter of 20 mm -30 mm, and it can break heavy armor within 30 steps with one or two medicines. ”

After dealing with Wang Song for a long time, Lin Tianyou's mouth is full of Wang Song's professional terms.

"Thirty steps, then my soldiers are not all shot by the opponent's archers!"

Wang Song shook his head and said solemnly: "If you want to improve it yourself, if you want to go farther and more powerful, you must increase the amount of medicine, and you must also ensure that the fire gun cannot be exploded." The firing range should be at least sixty or seventy paces! ”

Lin Tianyou nodded and said: "Don't worry, the villain has already been reunited with the craftsmen, and this matter will be done as soon as possible!"

Wang Song put down the fire gun and looked at his hands.

There was so much oil and rust on his hands, but he couldn't wash it clean, Wang Song sighed and wiped his hands.

"Xianggong, this is no way!"

Lin Tianyou smiled bitterly: "The craftsmen working in the iron room have black faces, black necks, and black hands all year round, and there is really no way to wash them!"

"How can there be no way!"

Wang Song was stunned for a moment, can't you just have soap!

It's not just a saponification reaction, there is nothing high-tech, it's just that people in this era don't know it.

Soap, fatty acid metal salts, metal mainly if sodium or potassium and other alkali metals. The simplest soap can be made with plant ash and vegetable oil.

In the chemical industry, sodium hydroxide or potassium hydroxide is mixed with fatty acids to obtain sodium/potassium salts of higher fatty acids, which is soap.

All the raw materials needed for soap manufacturing are available in nature, but they need to be collected and purified by reaction.

I already have sodium hydroxide, and I just need to produce it on a large scale.

"Big brother, this oil is not enough for people to eat. Isn't it too bad to use it this way?"

Seeing that Wang Song poured a bucket of oil directly into the sodium hydroxide solution in the pot, Zhao Ruolan said distressedly.

"Don't talk nonsense, hurry up and start the fire!"

Wang Song poured in a 30% sodium hydroxide solution and stirred it gently.

This step is called alkali precipitation and is an important process in the manufacture of soap. Use an excess of lye to further saponify a small amount of unsaponified oil in the soap.

Wang Song cut off a piece of yellow transparent semi-solid with a knife and handed it to Lin Tianyou, who was watching stupidly next to him.

"God, try again, see if your hands and face can be cleaned, and take off your clothes by the way, try too. ”

After a while, Lin Tianyou's surprised voice sounded in the courtyard.

"Xianggong, this is really a good thing you made, the grease and dirt on your hands have been washed, and the clothes are clean!"

Zhao Ruolan also got his hands dirty and washed them in disbelief.

"Big brother, what a good thing you made, you have to leave some for me! It's so much better than that soap!"

The Song people used honey locusts to wash and clean their faces, which is a kind of long soap called fat beads, also known as soap, and may also be the origin of the name of soap in later generations.

"Don't worry, there will be more in the future!"

Wang Song nodded, he pondered for a while, and said to Lin Tianyou: "Tianyou, you find me a few carpenters, I want to make some molds, otherwise no matter how good this thing is, it will not look good, and I can't afford to buy it." ”

Zhao Ruolan said with a smile: "Big brother, I didn't expect you to have the potential to be a profiteer!"

Wang Song smiled, profiteers and profiteers, no traitors and no businessmen. It's just that what he wants to do is for the safety of the people of the Great Song Dynasty. With money, you can hold up the stall in front of you.