Yu Wenkai's work efficiency was very fast, so he started his experiment directly in front of Wang Mang.

"This black thing, it will burn to produce high temperatures, the temperature in the core area is very high, not lower than the temperature in the center of the iron-making furnace, and it is easy to burn, and the degree of danger is extremely high. ”

In just a moment, Yu Wenkai told Wang Mang about his research results.

"What's in it?" Wang Mang said again, he vaguely felt that this thing was probably the one he knew.

"There must be sulfur, saltpeter and things like that. Yu Wenkai said directly: "As for the ingredients, this is very easy to identify, as long as you find the craftsman who made this thing at that time, you can quickly know the composition of this thing." ”

Call!

Gunpowder, black powder!

Wang Mang exhaled often, judging from the composition and basic functions, it must be the thing that changed the history of human warfare to a certain extent in his previous life.

Yu Wenkai looked at Wang Mang a little strangely and said, "Your Majesty, what's wrong?"

"Yuwen Kai. Wang Mang looked at Yu Wenkai and said seriously: "Now I tell you that the thing in your hand is officially listed as one of the top secrets of Great Qin, this thing, now I name him black powder, from now on, go to the secret workshop to make black powder in large quantities, regardless of the cost, I am useful." ”

Yu Wenkai was stunned at that time, he had never seen Wang Mang talk to him so seriously, he couldn't understand it for a while, so he said: "Your Majesty, this is just a burning ball, is it really so important?"

Wang Mang glared at Yu Wenkai and said, "There is a high temperature in an instant, I ask you, what will happen if this thing is compressed and stored in a confined space?"

"Explosion!" Yu Wenkai said directly: "High-temperature fryers are common sense. ”

"Very well, then I ask you, what will happen if you drop this explosive thing on the battlefield?" Wang Mang said again.

Yu Wenkai looked stunned, he had never considered using it in war, and now that Wang Mang said this, with his level, he naturally quickly thought of the huge destructive power that this "black powder" would cause when used on the battlefield.

Regardless of Wang Mang by his side, Yu Wenkai directly took out a pen and paper, quickly listed the formula on the paper and calculated it, and after a while, Yu Wenkai gasped, looked at Wang Mang with a shocked face and said: "Your Majesty, this black powder really has to be listed as a top secret." ”

"You figured it out?" Wang Mang said.

"Chen just calculated, calculated the heat generated by each kilogram of black powder, calculated the explosive power generated by these heat in the confined space, Chen found that if ten kilograms of black powder burned at the same time, the explosive force generated by it will threaten the martial artist of the skin refining realm, if it is carefully handled, the minister calculated that twenty kilograms of black powder can directly blow up the martial artist of the leather training realm, and after a rough calculation, the minister found that the explosive force generated by one thousand kilograms of black powder is enough to threaten the innate master. Yu Wenkai said with a shocked face: "This black powder must not exist in the hands of the people, this thing is too lethal." ”

Twenty kilograms of black powder can blow up a martial artist who practices the Skin Realm, and a thousand kilograms of black powder can threaten an innate master?

Wang Mang only knew that the black powder was powerful based on his previous knowledge, but how powerful the black powder was, Wang Mang didn't know, and now let Yu Wenkai say this, Wang Mang's attention to this black powder has risen to a new level.

After thinking about it, Wang Mang said: "Secretly collecting materials for refining black powder and refining a batch of black powder at the fastest speed, I have a lot of use." ”

Yu Wenkai nodded seriously, as a technocrat , Yu Wenkai has always been meticulous in completing the tasks issued by his superiors, not to mention this black powder, Yu Wenkai faintly feels that this is a great invention, as a witness to the invention of black powder, it is likely to go down in history forever, and at the same time, as a technical man, Yu Wenkai's mind is already thinking about a hundred ways to use black powder.

Thinking of the black powder, thinking of the straight road that was being built recently, Yu Wenkai took advantage of Wang Mang's absence and asked: "Your Majesty, can this black powder be used to build a straight road, the minister feels that if this black powder is used to build a straight road, the construction speed of the straight road can be doubled." ”

"Yes, it can also be used for water conservancy, in short, it can be used in places that can be used for people's livelihood, but the technical materials must be kept secret and not let people know. Wang Mang said: "Of course, don't use it now, you just have to refine, and I want to give South Korea a big surprise." ”

Yu Wenkai's expression was solemn, and he immediately understood why Wang Mang would list this black powder as a top secret, the biggest reason was South Korea, thinking of the sudden appearance of such a big killing weapon on the battlefield, Yu Wenkai couldn't help but shake his head, and then picked up a pen and paper, and quickly calculated the composition and production method of black powder.

This black powder was obtained by Yuwenkai when he was in Chang'an, and now he is stepping up his work, Yuwenkai naturally can't ask about the ingredients in Chang'an, so he can only study it by himself, and Yuwenkai heard that those people made this black powder at that time was also an accident, and the formula may not be correct, and with his identity as the first craftsman of Yuwenkai Daqin, Yuwenkai believes that in less than an hour, he will be able to decrypt the formula of this black powder, and at the same time further improve and strengthen.

South Korea attacked Hangu Pass, committed my Great Qin, and influenced this Lord to do research, so it is time to teach a good lesson!

Yu Wenkai thought in his heart, and then the pen in his hand calculated faster.

Wang Mang knows Yuwenkai's character, and knows that after handing over the task to Yuwenkai, Yuwenkai will at least 12% complete the task he assigned.

When Wang Mang returned to the tent, Lin Yuxin was already waiting in the tent, and when Lin Yuxin saw Wang Mang, he said: "I have already looked for Hua Jieyu, and Hua Jieyu only said that Shi Dangdang's son Shi Hu was sent to study in Jixia School Palace a month ago, and as soon as he entered Jixia School Palace, he became a personal disciple of a university scholar. ”

"Is it Jixia School Palace again?" Wang Mang's face turned cold, he had also heard of Shi Dangdang's name, he would never do this kind of indiscriminate thing, the world's famous generals are all based on their ability, and they really haven't heard of winning with their ability to do it, but now Shi Dangdang has done it, there must be a reason for this.

Although Hua Jieyu didn't say that this matter was related to Jixia Academy, there has never been such a coincidental thing in the world, and Wang Mang said: "Do you know what kind of poison Wang Yi has?"

At that time, Hangu was closed, although Wang Yi was suddenly assassinated, but Wang Yi still escaped the fatal point at a critical time, originally with Wang Yi's strength, there was no big problem, but the problem was that the dagger that stabbed Wang Mang at that time brought poison, as soon as the poison entered Wang Yi's body, Wang Yi felt bad, directly closed his facial features and six senses, and entered a deep sleep with the secret method of the Wang family, but Wang Jian also said that since Wang Yi directly used the secret method, it means that the poison is a poison that seals the throat with blood, and this secret method will not last long, and there is no antidote within three days, then Wang Yi will definitely die。