Listening to the gongs and drums, and listening to the voices, Xu Zizhen suddenly understood that what Zhao Gou wanted to listen to was not a detail, but to give him an explanation himself.

He had no choice but to respond, first let Gao Pet send his wives home, and then follow Zhao Gou through the crowd back into the city, as for Mu Dongbai, who was "watching the play", let him hang it first, anyway, the vultures are just a temporary retreat, and the good show is still to come.

Zhao Gou's drink was selected in the inner hall of the prefect's yamen, the wine and food were not ready, and there was news that King Kaiping and Lord Zhang Shuye were back, and the two of them were familiar with each of them and fought a beautiful ambush battle.

Gao Zhang's two veterans came to see Zhao Gou with blood stains all over their bodies, and after explaining the battle situation, they began to praise Xu Zizhen, and Zhang Shuye, who had a very good opinion on Xu Zizhen, was even more mouthless to boast, after all, these two enemy planes were the credit of Xu Zizhen's big black ball.

The Great Song Dynasty has been weak for a long time, and now it is even less than half of the country, fighting and losing, I don't know how much I lost in the silver land, and the two veterans were brave and loyal, and they were aggrieved for so many days, but today there were two big victories in a short period of time, and they were so happy that the folds on their faces were less than a dozen.

Zhao Gou smiled and comforted them with a few words and picked up the teacup, and the two veterans retreated with a very eye-catching look, in their opinion, His Royal Highness King Kang wanted to discuss confidential military affairs with Xu Zizhen, and no matter how old they were, it was inconvenient to participate.

Huang Huali's small round table put a few small dishes, and there are two pots of wine, Zhao Gou has not yet developed into an An Yi Emperor who hides in Lin'an and steals his life, he is still an ambitious hot-blooded young man, but he is a little picky, he said that the drink is really a drink.

Xu Zizhen didn't care about this, but secretly thought about how to explain, if it was half a year ago or earlier, he might have told it all without reservation, but now, he has to think about it.

Zhao Gou personally poured him a full glass of wine, with a smile on his face, and raised his glass: "Zizhen, thanks to you today, I have retreated the 100,000 Jin army, this cup, I respect you." ”

Xu Zizhen picked up the wine glass and said with a smile: "Seventh Master, you said that this honorific word can slap me in the face, it's better to be simpler, let's go one." After speaking, he raised his neck and drank it clean.

A hint of obvious unhappiness flashed in Zhao Gou's eyes, but he concealed it well and disappeared quickly, and then smiled as well, but he didn't finish the wine, only took a sip.

Xu Zizhen drank and drank, but the corner of his eyes kept looking at him through the edge of the wine glass, and the fleeting changes in Zhao Gou's eyes were caught by him, which made his heart move slightly, sure enough, this time is different from the past, Zhao Gou is no longer the easy-going and friendly seventh master before, after experiencing so many things and becoming the generalissimo of the Yingtian Governor's Mansion, his mood has obviously changed, and now he has begun to faintly have the temperament of a superior.

"Okay, there's no outsider here, let's talk about it." Zhao Gou put down the wine glass and looked at him with burning eyes.

Xu Zizhen thought about it, ran to the desk next to him and took out a piece of paper, took out a charcoal pen and said: "There is nothing to say about that cannon and crossbow, it is made for the siege soldiers of Wushu, but it has been changed on our original firearm rocket, and that black ball is a bit particular." ”

As he spoke, he drew a rough shape on the paper, looking like a pot, with an elongated bottleneck emerging from a big belly and a handle that could be shaken on the side of the belly.

"The ball is sewn from sheepskin, polished and then blistered, and there is a thing underneath, which is filled with black fire oil transported from Tibet, and the spout is lit, and the handle shakes to suck the oil out, and the fire will always burn, and the heat will steam, and the big ball will fly into the sky, and then tie it with a rope, and it will become the thing you see now."

After Xu Zizhen explained Zhao Gou, he understood: "Could this be changed by Kong Mingdeng?" ”

"Uh...... That's pretty much what it means. Xu Zizhen didn't bother to explain, Kong Ming Lantern is Kong Ming Lantern, the concept is a bit similar.

Zhao Gou asked again: "Then how is your clairvoyant mirror made?" ”

This is a difficult problem, Xu Zizhen scratched his head for a long time and didn't know how to explain it, so he could only say: "This is what I learned when I was a child in Nanyang, and I don't understand the specific principle." ”

Zhao Gou nodded, didn't ask, just looked at him.

Xu Zizhen understood, and drew a big-bellied thing on the paper, which was the big fireball device at the head of the city that could hit the distance with a parabola.

"Seventh master, look, this thing looks scary, in fact, it's worthless, this big belly is filled with water, firewood is on the bottom shelf, and then ......"

Xu Zizhen tried his best to explain the principle of the steam engine in a simple and easy to understand, in fact, he only knew a rough idea, because he used to fail physics when he was in school, and now he can make the steam engine thanks to Du Jin and a group of other friends pondering and experimenting day and night, he actually only provides a concept.

Zhao Gou frowned slightly, listening very seriously, but he could see that he was completely in a fog.

"Are you saying that such a long pole weighs a weight on the end of the pole, lifts it up with steam, and then bounces it back when the gate is released?"

Xu Zizhen said: "It's almost inseparable, that's what it means." ”

Zhao Gou nodded again: "What about the explosion outside the city?" Did you dig a tunnel and bury gunpowder? ”

Speaking of this, Xu Zizhen was full of tears, in order to avoid the intelligence network of the Jin people, these tunnels were dug by him and Wen Baer, in addition to the two of them, only a few science and engineering students he trusted helped transport the earthwork, even if they relied on Wen Baer's professional gold tools and the level of defying the sky, they were busy for more than half a month to complete, but they were tired like dogs.

Zhao Gou guessed correctly, it was indeed a tunnel with gunpowder, but dozens of passages crisscrossed like a chessboard were dug underground, and then explosives were placed on those intersections, and all the fuses were connected, and the underground had to be ventilated, otherwise the fuses would be extinguished due to lack of oxygen before they were halfway pointed, so there were more than a dozen vents in the tunnel, and in the sparse fruit grove that Wushu saw, the vents were so open on the ground, only blocked by a mesh made of bamboo strips, to prevent hare rats or something from falling in.

This mechanism was inspired by Xu Zizhen when he was in Xu Mo's house, and the old Xu family's medicine was put underground, and it was done in order to keep it dry and ventilated, but it was learned by Xu Zizhen to be used to fight wars, and the effect was surprisingly good.

Wushu was a little more confident, so he didn't send anyone to inspect the forest, and as a result, he suffered a big loss, and almost all of the 23,000 people were gone.

After listening to Xu Zizhen's explanation of everything, Zhao Gou nodded for the third time and said with a smile: "Zizhen is really a genius with unparalleled wisdom and talent, could it be that you are really an immortal envoy sent by God?" ”

Xu Zizhen laughed, and was about to follow these words with two jokes, but heard Zhao Gou say again: "Zizhen, there are dozens of teenagers in my house, all of whom are talented and intelligent, I wonder if you can teach them for me and let them learn your gunpowder skills?" ”

Zhao Gou had a gentle and kind smile on his face, but Xu Zizhen couldn't help but feel a chill in his heart.