Mr. Cicada said: "As far as I know, the Xuanmen monks are very particular about alchemy, before I start speaking, I want to know if your predecessors have discovered the gunpowder formula during alchemy?"

Yu Yunluo said: "Of course there is! Jinshi medicine is often very poisonous, in order to remove the toxicity, it is often smelted until it no longer changes, we call it Fuhuo." The gunpowder formula was discovered by accident when trying to remove the toxicity of the goldstone drug using the fire method. Later, alchemists would deliberately use gunpowder when ambushing fires, with the help of its ability to burn violently, in order to enhance the effect of detoxification. Over time, the gunpowder formula was improved as a result. ”

Yu Yunluo's master, Ge Hong, is a famous pharmacist and alchemist, and he has a deep knowledge of fire alchemy.

Mr. Cicada said, "Oh, what's your gunpowder recipe?" ”

Yu Yunluo hesitated for a moment and said: "After the family master ascended, he changed to alchemy with spiritual objects, although he refined the fire essence medicine, it is the secret recipe of the sect, and it is inconvenient to pass it on. As for the gunpowder formula he found in the mortal world, he did not improve it, but he was afraid that Mr. would laugh. ”

Mr. Cicada said: "It's okay, I just want to see how well you have studied gunpowder in pure engineering, so that I can choose the most effective method of explanation, your masters must be everyone, how can I laugh at their early achievements?"

"In the "Secret Record of the Green Capsule" annotated by Sun Simiao, there is the Danjing Inner Sulfur Method, which should be the best gunpowder formula in the mortal world at present. I'll show it to Mr. right away!" Feng Luqi hurriedly took out the "Secret Record of the Green Capsule" from the dimensional satchel, turned to the page that recorded the sulfur method in the Dan Sutra, and handed it to Mr. Cicada Flower.

The book is written in Taoist cloud seals, and it is also a common text in the spiritual world, and Mr. Cicada has no obstacle in reading it: "Well! Except for the soap horn, it is almost the same as the original gunpowder formula of the Six Poison Island, and with only a little improvement, it can make a powerful firearm, at least enough to beat the magic weapons of many mortal monks! However, this kind of gunpowder is very outdated on the Six Poison Island today, and it is the formula of two thousand years ago. ”

Zhang Yuyun said: "Just look at your firearms, you can think of them with your toes, I'm afraid that no one in the mortal world can even think of grenades and arrows until now, let alone that rotary machine gun, it's really powerful! But the structure must be very complicated." It's a grenade arrow, and if a mortal wants to explode when he hits the target, it's definitely very difficult, and I can only think of using spells to achieve it. ”

"Hehe, we didn't use a spell to detonate a grenade arrow, but a mechanism called a bump fuse. We'll talk about this later, but let's talk about gunpowder first. Mr. Cicada Flower returned to the topic, "I guess the fire essence in Miss Yu's door is a kind of spiritual gunpowder that is infused with mana during refining, right?"

Seeing Yu Yunluo nodding yes, he said again: "Then do you have a firearm that uses gunpowder?"

Yu Yunluo shook his head and said: "There are no firearms, except for medicinal use, they will be added when refining the flame magic weapon." ”

Mr. Cicada said: "We also have gunpowder that fuses mana, but it will be used on firearms, and it is one of the strongest gunpowder at present. However, famous pharmacists did not bother to refine this gunpowder. Only by refining gunpowder with equal power by pure engineering methods can one prove one's attainments. ”

The Demon Sword of the Prime Minister seconded: "It is easy for this kind of person to appear in the civilization of magic engineering, especially in ancient times, because some things are much more complicated to do with labor than spells, so some people like to strive to achieve all their wishes with technology, so as to show their extraordinary knowledge and intelligence." ”

Mr. Cicada said with a smile: "Hehe, what you said is very accurate! Since you all have a certain amount of research on gunpowder, I will not talk about the history of gunpowder development on the Six Poison Island, but directly talk about the strongest gunpowder that has been refined purely with engineering knowledge." ”

Sima Chengzhen and his entourage were all attentive and ready to listen carefully.

Mr. Cicada thought for a moment and said, "In fact, the secrets of gunpowder are all hidden in the hexagram, whether it is refined with mana or not, only the medicine with a microstructure that conforms to the meaning of the hexagram has the potential to become gunpowder......

"What is microstructure? The younger generation doesn't quite understand, so I ask my husband for advice. Sima Chengzhen took advantage of the fact that he hadn't continued to speak, and hurriedly asked questions.

Mr. Cicada said: "Everything in the world is subtle, whether it is engineering or metaphysics, we must penetrate into the subtleties in order to reach the mysteries." The infinitesimal must accumulate to a certain extent before it can be seen, and until then, the accumulation of the infinitesimal remains subtle. The accumulation of the infinitesimal into the subtle, like the accumulation of parts into a machine, is not without discipline, but has its own composition. Machines have structures, so subtleties also have structures, so subtle structures are called microstructures. ”

"The change in the tripod, the subtle microfiber, the mouth can speak, and the ambition cannot be described. Sima Chengzhen couldn't help but feel it, and after a moment of afterthought, he said, "Then may I ask, why does the microstructure of gunpowder have to conform to the hexagram and the reason?"

"That's a very good question!" Mr. Cicada explained, "The Yi hexagram is composed of yang and yin lines, and in the microstructure, each hexagram can represent a subtlety with a corresponding microstructure.

As far as Bagua is concerned, the upper and lower lines represent the infinitesimal and the middle line represents the subtle and subtle invisible force, so the middle line is yang, which represents the stable binding force, and the yin is yin, which represents the unstable binding force.

Our research has found that the microscopic binding force of all kinds of gunpowder is unstable, and all of them do not conform to the structure of the hexagram, and once ignited, the subtlety of gunpowder will quickly decompose, and at the same time a huge number of qi will explode.

Therefore, we call the gunpowder that is most in line with the structure of the separation hexagram and is completely refined by engineering methods and is extremely powerful as the separation sand. ”

Xu Yibing smiled knowingly: "This name is quite similar to sand magic weapons, such as Jindan Sand, Sky Blue Divine Sand, Lei Ze Divine Sand, Tianxuan Star Sand, and so on." ”

Mr. Cicada Hua nodded and said: "However, to deeply analyze the microstructure of different gunpowders, it is far from enough to use the separation hexagram of gossip, and even the sixty-four hexagrams are still a little worse, and further hexagrams need to be performed ......."

Xuanmen practice often uses Yi hexagram to interpret the mystery of magic, and Mr. Cicada Hua uses Yi hexagram to interpret the microstructure of gunpowder, which can be said to be very appropriate, so that Sima Chengzhen and others quickly understand this kind of gunpowder refined by advanced engineering.

The bullet is the most closely related part of the firearm to gunpowder, and the structure is not very complicated, so Mr. Cicada also talked about the structure of the bullet by the way: "The early bullets were all pellet-shaped, there were no cartridge cases, the loading and firing speed were very slow, and the gas generated by the explosion of gunpowder could not fully propel the bullets and shells.

In order to solve the above problems, firearms craftsmen invented the cartridge case, from which the bullet consisted of two parts, the warhead and the cartridge case, and the shape of the bullet was changed to a cone.

There are two kinds of gunpowder used in bullets with cartridge cases, which are divided into ignition powder and explosive powder, the amount of ignition powder is small and sensitive, and it is enough to burn when hit;

Ignition powder is also used in the bump fuse of grenade arrows, with the difference that one is used for arrows and one is used for tails. As for the structure of the shells and bullets, I will not repeat them. Is there anything else you would like to add, Mr. Yuguang?"