Because if Zheng Qingzhi had learned the news in advance, he would not have gone to Tianzhu to persuade him to surrender.

Judging from the time when Wu Hui was beheaded, it must be that before going to court in the morning, all the court officials had made plans and unified the caliber in advance to kill Song Yulin.

After that, the Golden Palace discussed matters, the court issued an order to take the people in the Heavenly Prison and behead them at noon. The time was just right! So this time is very important. Wuxuan asked the Haimu Hall to record the date and time of yesterday in detail.

After that, Song Wuhui learned about the development of gunpowder weapons in the Heavenly Prison.

As for the confidentiality measures of the Song Dynasty, there must be many holes and air leakage in front of the teacher.

However, these weapons were obviously developed secretly, and I am afraid that the samples were just made and not put into mass production, so no regrets were still important.

Based on his memories, Wuhui explained the various parameters of the most important tiger-running cannon in detail.

In the cabin on the lower floor, the sound of Wuxuan is low and clear, smooth and simple.

Showing his meticulous thinking and amazing memory, Hai Mutang's pencil also jumped rapidly on the paper.

After Song Wuhui finished talking about the size parameters of the Hub Bin Cannon, he immediately continued: "That cannon, judging from the bronze color outside, should be pure copper and tin-zinc alloy."

"I guess the metal ratio and zinc content are about the same as our naval brass, but the tin content is much higher... When Wuhui said this, Hai Mutang raised his head in surprise, as if he was about to ask something.

But he saw Wuhui laughing and said, "Continue to record... Since the light was not strong at that time and the lights in the cell were dim, it was difficult to judge the distribution from the metallic color."

"But there is no doubt that the tin content in the material is so high that the bronze surface has an off-white luster."

At this time, Hai Mutang nodded, looked at Wuhui, and couldn't help but feel secretly surprised.

The girl thought to herself, "I don't know how the teacher trained her, but she knows such an unpopular knowledge?"

"And he could actually judge the rough components inside by the color of the metal surface... What did this kid learn when Tianjiao was in school?"

Hai Mutang continued to write while thinking in her heart.

Then Song Wuhui continued, "The saltpeter content in the gunpowder that Zheng Qingzhi showed me was close to three-quarters, almost reaching the golden ratio of gunpowder ratio."

"However, the raw materials of gunpowder are not purified enough, the grinding and powdering process is not fine enough, and the gunpowder particles have not been polished by drum..." When Haimutang heard this, the girl couldn't help it.

She knocked on the notebook with a pencil and asked Wuhui in wonder: "How do you know the content ratio of this gunpowder?

Just look with your eyes?"

"I secretly hid a little and stuffed it into the cracks of my fingernails. Then I tasted it when Zheng Qingzhi left..." Wuhui was interrupted at this time, and he explained with a smile.

"I see!"

At this time, Hai Mutang sighed with a frustrated look, and then when she picked up the pen and was about to continue writing, she suddenly burst out with a "poof".

"You don't know where the saltpeter in the Great Song Dynasty gunpowder came from?"

He saw Hai Mutang smiled and said to Wuhui: "They use the feces, urine, and salts!"

Seeing Senior Sister Haitang staring at her gloatingly, looking overwhelmed, Wuhui couldn't help but smile helplessly and shook his head.

"Of course I know the source of saltpeter, but for the sake of intelligence, what can this matter count?"

Wuhui smiled and said to Hai Mutang, "After the matter is over, I will find a way to forget the smell."

"Can you forget it?"

Hearing this, Hai Mutang looked at the heroic junior brother in front of him curiously.

"Of course not all the flavors can be forgotten."

At this moment, Wuhui looked elsewhere as if nothing had happened, while pretending to be casual: "Like the taste of that bowl of wontons, I can't forget it for the rest of my life..."... At this moment, in this cabin, the two people's slightest voices suddenly stopped.

In this tranquility and tranquility, there seemed to be a hint of warm affection in the air, flowing slowly between the two.

...Li Muyuan led the Lin'an army and took his position again under the city of Lin'an.

But even though he fought back and forth one hundred and seventy miles away, the million-dollar army brought by Zhao and Ju was still moving slowly towards Lin'an more than a hundred miles away.

At this time, everyone in the world was waiting for the moment when this war began.

I don’t know who can win this victory with a massive number of advantages and the most powerful army in the world?

...At the same time, Xingyuan Prefecture, 3,400 miles away, was located on Lizhou East Road, 3,400 miles away.

Xingyuan Prefecture is the neighborhood of Hanzhong, Shaanxi in later generations. If you still remember it, Shen Mo had the first time in the case of Guifanlou, when Shen Mo had confronted Xiang Chang'er, a spy from the Western Xia secret.

He stopped the Xixia people from invading spies into Xingyuan Mansion in Xiang Chang'er's hands.

Lizhou East Road is vast and sparsely populated. Except for the Han River Basin, the rest of the area is sparsely populated and the land is desolate.

At this time, Zhang Dongyu, the governor of Xingyuan Prefecture, was running towards the city panting.

This guy lifted his robe and ran in a mess.

Before the person could reach the city, a heavy breathing sound came up.

Zhang Dongyu, we are in our forties, have a face as beautiful as jade, five long beards, phoenix eyes and long eyebrows, and are very elegant.

This guy looked very similar to the Jade Emperor on the Underworld Coin... But he ran away in a mess at this time and had already thrown his graceful demeanor far away.

When he climbed up the city wall and looked down, he immediately came from the official boots to the hat wings, and his whole body trembled! He saw a team of heroic soldiers lined up in front of the city, and a stern and majestic aura in the team soared into the sky!... The number of people in this army was not large, but at first glance it was a clean military appearance, and the smell of an iron-blooded army was emitted from the inside out.

And the most scary thing is the military flag in front of the team! I saw that the largest flag read "Huaiyang Legion on the East Road of Huainan of the Song Dynasty".

At the same time, on the military flag in the team, the three big characters "Break the camp" are written in a tense way and are moving with the wind.

In front of the team, a general riding on a horse was wearing black iron armor.
Chapter completed!