When Princess Yuzhen Li Zhiying appeared in front of Pei Min, Pei Min didn't recognize her at that moment.

In his memory, Li Zhiying should be a very cute little Lori, but he doesn't want the eighteenth change of the female college.

In the blink of an eye for four or five years, Li Zhiying turned out to be a slim girl. She has long hair and a shawl, a blue and glamorous robe all over her body, and a gold belt tied to her hair, which shines brightly, and her skin is better than snow, and she is extremely beautiful.

Looking at the look of Princess Taiping between the eyebrows, Pei Min couldn't help but secretly praise in his heart: "The fine bloodline of this handsome man and beautiful woman of the Li family is indeed very good." ”

Princess Taiping is forty or fifty, still beautiful and incomprehensible, and according to legend, Princess Li Bao'er of Anle was the first beauty in the Tang Dynasty in the past. And the princess Yuzhen in front of him is not very old, but she also deserves the praise of her beautiful appearance.

"Pei Min has seen Princess Yuzhen!" Although Pei Min is the most powerful minister, when he sees the emperor's sister, he still needs to salute and say hello.

Li Zhiying also gave a thousand blessings at the first time, for a virtuous general like Pei Min, even if she is a princess, she can't help but give respect, and said with a light smile: "The prince doesn't need to be polite!" Guogong is still a life-saving benefactor who holds the profit! If there is no Guogong, I am afraid that I will die at the hands of the assassins. ”

Pei Min was ashamed and said: "The matter started because of the below, how dare you ask for credit below?" The still tired Jade Zhenguan was almost damaged......"

Li Zhiying frowned slightly, two contacts with Pei Min left a deep impression on her heart, once for her gentle forehead injury, once to save her life, the relationship should be more harmonious, so unfamiliar, she was extremely uncomfortable, thinking of her identity, she sighed slightly in her heart: "Zhiying has investigated, the damage of Yuzhenguan has nothing to do with Guogong." It was the Assassin who set fire to the alchemy room, causing an explosion. Like black powder, a terrifying cloud of black mushrooms sprung up, causing the fire to spiral out of control. ”

It was the first time for Pei Min to hear this speech, and he couldn't help but be surprised.

Li Zhiying said: "Zhiying is extremely curious, the Dan room is full of flammable things such as sulfur and saltpeter, and it is not surprising that they burn with the trend." But the refractory alchemy furnace has cracked open for it, which is strange. Zhiying wanted to understand the reason, so she kept flipping through the ancient books and found many interesting things. For example, if you fill the bamboo with saltpeter and light it inside, the bamboo will burst. Then there is the sulphur, liquor, and hay that are thrown into the sun, and over time they will burn themselves...... There are many, many strange phenomena that I don't know why, but I just think it's very interesting. I've been wondering if I can research something that will blow up the alchemy furnace......"

She was a little unhappy at first in her heart, Pei Min's too much raw content made her particularly awkward.

But the more she spoke, the faster she spoke, the more excited she became, her big eyes full of curiosity about all the unknown.

She didn't dare to say these words to outsiders, even her closest father and brother.

After all, she is the princess of the Tang Dynasty, and she will affect her identity when she spreads out. At present, only her closest maid knows her special fetish. However, for Pei Min, she has no scruples.

As a confidant and confidant, Li Zhiying felt that Pei Min, who discovered black powder and developed it for use in the world, must be able to understand her feelings.

Pei Min was dumbfounded when he heard this, and looked at Li Zhiying with a little dumbfounded, with a shocked and shocked face.

He understands Li Chiying's feelings too well, and when he was in college, he had a small hair who grew up wearing the same pair of pants and was admitted to the chemistry department. Since then, he has been out of control and has become an experimental maniac, obsessed with experiments all day long, unable to extricate himself.

Pei Min asked him to go out to play with girls and experience college life, and what he got was always the sentence "Do experiments, there is no time".

Li Chiying's expression at the moment is no different from his small hair, just like a demon, obsessed with all kinds of chemical reactions.

Li Zhiying also knew that he was too excited, so he didn't say anything, looked at Pei Min with a little apprehension, and asked, "Guogong won't feel that Zhiying is enchanted, right?" ”

Pei Min shook his head and said, "No, how could it be, it's just a little surprised, too surprised, and a little admired." ”

He knows that the ancient is different from the modern.

Most of the chemical reactions in modern times have long been understood, at least in school. According to book experiments, there is little chance of failure. Now it's different, there was no accumulation of this in ancient times, everything was zero, and it needed to be pondered little by little.

This follower will never be able to appreciate the joy of the founder's success and the hardships of failure again and again.

Li Chi Ying can be said to have started from scratch, and it is not easy to maintain this enthusiasm.

Li Zhiying listened to it, and said with a bright face: "I know that Guogong can understand Zhiying, but Zhiying is stupid by nature, and after a few years, he has not gained anything." On the contrary, Guogong is busy with affairs, and in his spare time, he still successfully studies black powder......" she said this, a little frustrated.

Pei Min hurriedly comforted: "Princess, this is a high opinion of Pei, black powder is indeed not developed by me." I knew the formula from ancient books, and then developed it by many alchemists such as Qingxuzi and Gu Hongzi. Pei didn't dare to take the ......"

Li Zhiying felt a little better.

Without waiting for her to ask about the formula of black powder, Pei Min asked with a smile: "I wonder what the princess's research results have been over the years?" The birth of black powder involves a completely new science. This kind of knowledge is extremely difficult to grasp by relying on the strength of only one person. But I don't know how much the princess studied alone and understood. ”

Li Zhiying asked her henchman Linglong to go to the car, fetch what she had studied, and said with a low sigh: "There are no effective results, since the imperial brother learned that Guogong invented black powder, he has associated it with gunpowder in his heart." Gunpowder is based on saltpeter, which must be the main material. From this aspect, the results of holding profits have a violent reaction, but it has not been effective. ”

Linglong took a small wooden box at this time and handed it to Li Zhiying.

Li Zhiying handed it to Pei Min and said, "This is the limit of Zhiying's current burning!" The reaction is indeed great, but it is a pity that it is flashy, so gorgeous and beautiful, and when it is lit at night, it is like countless fireflies flying around. ”

Pei Min took the wooden box curiously, opened it, and his eyes were full of shock: the box contained tiny black particles, black and shiny, like sesame seeds and rice grains.

"Granular!"

These three words appeared in Pei Min's mind, and he always knew that there was still a lot of room for improvement in black powder.

One of the fatal shortcomings is that the combustion is too slow, so that the expansion of the gas is too slow, resulting in a lot of difference in power and applicability.

This point can be made up for by granulation, the pure black powder mixed with saltpeter, sulfur, and charcoal is powdered, and it is also because of the powder that it causes the characteristics of burning too slowly and expanding too slowly. However, as long as the black powder is made into granules, this defect can be compensated for to the greatest extent.

It's like the experiment of the military department, because the space is a hut, so it takes a certain amount of time to burn before it explodes. If the black powder at that time was granular, Pei Min might not be able to run to Li Longji's side, it would not take more than ten seconds, it would be able to explode in five seconds, and it would be even more powerful.

It's just that Pei Min knows the convenience brought by granulation, but he doesn't know how to make black powder granular.

This is also the goal of the next research and development of black powder.

It's just that this research and development takes a certain amount of time, and it is imperative to open Longshan Mountain and repair Wusheling Ridge, and the power of powdered black powder is enough to deal with it, so there is no need for the development of granularity for the time being.

Pei Min never imagined that Li Zhiying would develop the effect of granulation in advance, which is a big leap forward in black powder, and looked at Li Zhiying in surprise and said: "How did the princess do it, I mean granular." Saltpeter or something should be in the form of powder, right? ”

Li Zhiying didn't know why, but he still said truthfully: "Saltpeter, soaphorn, arsenic, and cinnabar are mixed together, and they are not easy to burn. Many times when the nitrate is burned, the soapcorn, arsenic, and cinnabar are still there. I came up with a method, just like making ink, pounding, hammering, pressing, bringing all the materials together, then drying them, and cutting them into these grains. Sure enough, it's useful, it's not saltpeter, it's saltpeter, it's soaphorn, it's all mixed together, burning and extinguishing together! ”

Pei Min didn't know how to describe his mood at the moment, and only praised half-loudly: "Princess, you are really a genius!" ”

Li Zhiying praised inexplicably, although she didn't know why, she was also very happy.

Pei Min explained: "Princess's granular innovation is a big step forward, you just don't know the formula of black powder. If you know, the black powder you make in this granular way is much more powerful than ours. As he spoke, he bowed deeply to Li Zhiying and said, "I wonder if the princess can explain in detail how to granulate it, so that it can be used on black powder, and granulate the black powder together to make it powerful." ”

Li Zhiying seemed to be hit by a pie in the sky, his original whimsy made Pei Min pay so much attention, his little vanity was greatly satisfied, and he was even a little frightened, and said with his hands dancing: "What's the problem, Zhiying tells Guogong." It would be even better if Guogong could lead Zhiying to visit the black powder workshop. ”

"What's so hard about that?" Pei Min directly made a gesture of please, and said, "If the princess wants to go and see it, I'll take you there." It just so happened that the princess also taught our people the method of granularization to increase the power effect of black powder. ”

Li Zhiying's big eyes shone with excitement, and at Pei Min's invitation, they went to the Shence Army camp together.

After entering the barracks and walking on the way to the black powder workshop, Pei Min and Li Zhiying walked side by side, explaining the materials of black powder and the principle of explosion.

"I see!" Li Zhiying suddenly realized: "It turned out that the explosion was formed by the qi support, and I thought the wrong way." Zhiying understood that powdered black powder was like sand, too dense and not easy to burn deeply. And granular black powder, each of which is a whole, is connected to each other and can be ignited one after another. Burst more gas in the shortest amount of time, making the faster explosion of black powder more powerful! ”

"Princess, you are such a genius!"

Pei Min once again felt so emotional.