On the day when Zhu Pingjin listened to the rain in Bifeng Gorge and started class, his wife Luo Yuhong was sitting at the desk in the rent collection courtyard and meditating. She plans the next step in production research.

It was late at night, and the dim oil lamp jumped and jumped, which made Luo Yuhong even more irritable, making it difficult for her to concentrate. With the strong support of the princess, the essential oil products were immediately sought after by the market as soon as they were launched. The main consumer groups are the various royal palaces. Princess Fushun started the fastest and most ruthlessly, buying five bottles at a time. Princess Taiping hesitated for a moment and only bought three bottles. As for the other palaces, only one bottle was bought. The essential oil even alarmed the prince. The reason is that a general of the town under King Deyang, because he couldn't stand the noise of the mother-in-law at home, so he turned around and inquired about the origin of the essential oil, and directly asked to see the prince, hoping that he would say hello. The prince asked the great eunuch Chen En to send a message to the princess, saying that everyone is a relative, don't hurt the harmony, and if there are good goods, they will be evenly matched with each other. The prince's words were transferred to Luo Yuhong by the princess, which made her embarrassed. The stock of dried flowers in the palace has been used up, and everything else that can be collected has also been used up. Luo Yuhong doesn't dare to offend her future in-laws now. In desperation, she asked Li Sixian to steal more than a dozen bundles of dried straw in the field, distilled the essential oil and mixed it with the Baihua essential oil for her own use, and then she barely made a difference.

But the same mother does not have the same fate. Essential oils were a success, but the follow-up essential oil soap project failed miserably. The reason for the fiasco is not that the quality and efficacy of the product have failed, but that the appearance is too poor. The essential oil soap did not look as clear and cute as expected, but looked gray and black, and it made people want to vomit when they looked at it. The reason is that Luo Yuhong replaced caustic soda with plant ash soaked in water, which caused the soap to be very dirty, and there was no ultra-fine filter material, and the soap was always gray. To this end, Luo Yuhong experimented with precipitation, adsorption and other methods, using good silk and rice paper, but the effect is still not ideal. There was no pure caustic soda, so Luo Yuhong had no choice but to announce that the project was temporarily suspended. In addition to the loss of manpower and material resources, two bottles of excellent essential oils were also put on board.

What product to develop next, Luo Yuhong began to be a little undecided. A business has just entered the market, and civilian chemicals are the most profitable. However, civilian products are the least needed at present, and the most needed are military products. For example, the main purpose of her production of essential oils is nothing more than to win the approval of her future in-laws, and it doesn't matter whether she makes money or not. Since the first lunar month, Zhu Pingjin took her younger brother Luo Jingyun to Mengding Mountain, and I don't know how they are training their soldiers now. Maybe in another year or two, he will lead his troops to the battlefield. The two have lived together for so many years, and Luo Yuhong knows Zhu Pingjin very well. This is a war about the survival of the Ming Dynasty, and it is also a war about his survival and his own survival. As long as Zhu Pingjin's surname is Zhu, then he has no room for compromise and evasion. As a time-traveler from the future world, he would never be foolish enough to let a soldier practice broadsword and spear. In the war of life and death, accompany Li Zicheng, Zhang Xianzhong and the fourth elder brother to play weapon upgrade games. From the very beginning, he had to use the knowledge that the two of them possessed that was ahead of this era, and use all the resources he had at his disposal, to create a weapon that was absolutely superior to his opponent, and then turn the other party into a corpse with no threat! She is very sure that if she can build an atomic bomb, Zhu Pingjian will not hesitate to use it on the battlefield!

If you want to fight, you have to die, this is something that can't be done, which made Luo Yuhong sigh and return to reality. The creation of murder weapons was a must, and she had no choice at all. When Zhang Xianzhong went north from Renshou County to attack CD Mansion, he passed by the rent collection house where Luo Yuhong now lives. So much grain in the granary disappeared at that time. To fight a battle like Zhu Pingjian, a large amount of gunpowder and explosives are needed, and there must be all kinds of pyrotechnics, such as firing powder, hair pulling powder, detonators, and so on. Luo Yuhong is not familiar with these things at all. But Luo Yuhong believes that for an undergraduate student majoring in chemical engineering, unfamiliarity is only relatively for people who have specialized in it. It is impossible for a chemical engineering major not to have studied nitro compounds. Besides, when she graduated 20 years ago, she also interned in a nitrogen fertilizer factory in China for half a month. Commonly used explosives are basically nitro compounds, such as thundermercury, fire cotton, ammonium nitrate, TNT and other pyrotechnics, only a few such as potassium chlorate are not.

"Little Red! Little Red! Luo Yuhong shouted a few times but did not respond, so she had to find the teapot and pour a cup of cold water.

"Dead woman, I don't know where to go!" Luo Yuhong scolded in a low voice, not noticing that the time had passed.

"A comprehensive research institute should be established immediately to bring together metallurgy, iron and steel, chemical industry, machinery, and other fields related to war science and technology!" The distraught Luo Yuhong finally sorted out a train of thought, found a piece of paper and prepared to write it down, but found that the tip of the brush and the ink had already frozen together.

"Little Red! Li Sixian! Luo Yuhong pushed open the door and shouted again.

"What is the matter with Miss Luo calling slaves?" Li Sixian ran out of the wing room in the front yard with his clothes on. Since the discontinuation of the essential oil soap project, the rent collection yard has been suspended. Luo Yuhong put the eunuchs on vacation, but Li Sixian refused to leave, saying that the prince specially asked him to come over to listen to Miss Luo's orders. Luo Yuhong was very unaccustomed to a man serving him, and knew that he was actually not a man, so he had no threat, so he had to stay as he wished, and he didn't want him to wait with him. Li Sixian had no choice but to continue to stay in the gatehouse in the front yard.

Luo Yuhong said: "Go to the stove to find a carbon bar, this girl wants to write!" ”

Li Sixian had already run closer, "The girl wants to write, and the slave will immediately study the ink." ”

Luo Yuhong said impatiently: "When will it be?" If you are told to go, go quickly! ”

Li Sixian hurriedly responded, turned around and ran to the stove in the front yard. After a while, he ran back with his hands in the dark, clutching a carbonized stick of wood in his hand.

Luo Yuhong was blown by the north wind outside the house, and the anger had already gone down, and when she saw Li Sixian's appearance, she was inevitably a little embarrassed, and hurriedly asked him to go back and continue to sleep.

Li Sixian said: "Since the girl didn't sleep, how could any slave go to sleep first?" The slave and maid waited outside the gate. The carbon strip was thicker, and the slave and maid sharpened it and the girl used it again. It is better to wrap it in another layer of paper so that the girl's hands do not get dirty. ”

Luo Yuhong can only be described as moved. She had never found such a dedicated employee before. They are always late for work hours and disappear when the end of the day comes. Now there is one who appears coldly, and he is still an artificial disabled person who is neither male nor female, which really makes her feel very admirable.

"You don't stand outside. It's windy outside, don't catch a cold. Come in and sit down! I'll probably have to work for a while. Luo Yuhong went straight back to her desk and began to write down her thoughts one by one with a finely polished carbon strip, completely ignoring Li Sixian's dark hands, trembling in the night.

“…… purification of potassium nitrate; natural gas desulfurization to sulfur; Charcoal is extracted by dry distillation method. Sulfuric acid is then produced from sulfur ......"

Luo Yuhong finished writing the last few words, put the carbon strip aside, and let out a sigh. Luo Yuhong has confirmed the focus of recent research. The first is the trial production of sulfuric acid and nitric acid; The second is the industrial production of black powder. At the same time as these two tasks, the preliminary preparations for the establishment of the institute began. However, the funds, land and talents required for this preparation will have to wait for Zhu Pingjin to come back, and the two will discuss it before proceeding.

Tomorrow, go home and bring some saltpeter and brimstone. Those things are in danger of exploding, so they have to be left here.

What is Zhu Pingjin doing? Will he miss me? Luo Yuhong looked out the window at the dark courtyard. There was not a single light outside, revealing a primal darkness; There was also not a sound outside, as if the world had stopped. The brazier in the room had been extinguished, Li Sixian was lying on the table and had fallen asleep, Luo Yuhong took a deep breath of real air, and said to himself in his heart: "It turned out that you sold fake drugs to kill people for money, and now you are making explosives to kill people." What the hell are you doing all your life! ”