Traveling through Du He, Li Chengqian's rebellion begins

Yunlong Cannon?

What is this?

When everyone heard this unfamiliar word, they scratched their cheeks, confusion written all over their faces.

Du He explained: "The cannon is a projectile device, you can think of it as a catapult."

"The Yunlong Cannon we are going to develop next is more accurate than the trebuchet and can project farther!"

That's it!

Everyone's faces suddenly showed a look of enlightenment.

Although they did not understand what cannons were, they were very familiar with catapults.

Du He took a piece of limestone and drew the shape of the gun barrel from his memory on a wooden board stained with ink.

"Everyone, this is the barrel that launches the gunpowder. Our next step is to develop the barrel."

"The principle of a gun barrel is to use gunpowder to burn in a confined space to generate a large amount of energy, which is then ejected from the barrel."

Gun barrel?

Combustion generation capacity?

Everyone looked at the tubular figures on the wooden board and heard Du He say unfamiliar words. They felt like they were listening to a foreign language.

Du He explained to everyone over and over again the knowledge he had acquired in junior high and high school, as well as the principles of artillery that he had learned on the Internet.

He doesn't care whether it's right or wrong, he just says whatever he thinks.

Two hours later.

Taoist Master Zhen Fengzi was confused and said, "Lord Han Guo, we understand every word you said, but when you put them together, we don't understand anything."

"We are all stupid people, without your intelligence. Can you explain it more simply?"

The other Taoists, blacksmiths and craftsmen also responded.

They listened for two hours, and although they knew the function of the Yunlong cannon, they had no idea how the barrel could launch the cannon.

If they don't understand this point, they won't be able to make a thunder bomb at all.

Think for a moment.

Du He said to Zhen Fengzi, "Master Zhen, rub a small thunder bomb with your hands and put it into the sealed bamboo tube."

"Remember that the gunpowder should only take up 20% of the bamboo tube, leaving the rest of the tube empty, and the wick should be placed at the bottom of the tube."

He planned to make the Chuan Tian Monkey so that these people could understand the principle of how gunpowder combustion generates propulsion.

"promise!"

Zhen Fengzi responded and then left quickly.

...

half an hour later

Zhen Fengzi, Yuan Keshi, Li Qingcheng and others surrounded Du He. They looked at the peculiarly shaped bamboo tube in Du He's hand with curiosity on their faces.

What is this?

What is the use of it?

Du He did not explain to them, but led them out of the open space and then stuck the bamboo tube version of the monkey into the sand.

"Zhang Shizheng, take the tinder and light the wick."

"promise!"

Zhang Shizheng responded.

He lit the wick under the gaze of everyone. As the wick burned out, a spark suddenly spurted out, and then the bamboo tube quickly rushed into the sky.

After a few breaths, the bamboo tube in the sky made a crackling sound.

"this..."

"The bamboo tube can actually fly!"

Everyone looked at the scene in front of them, their faces filled with disbelief.

Especially Master Yuan Ke and a group of craftsmen who had just joined the team, their mouths were wide open, and they admired Du He more and more in their hearts.

Du He looked at the ascending Heavenly Monkey and thought to himself that when Li Chengqian ascended the throne, he could hold a large-scale fireworks show.

By then, the news of the immortal's congratulations will surely spread throughout the entire Tang Dynasty.

Wait until they are done with their excitement.

Du He then asked Zhen Fengzi to rub a few sky monkeys with his hands, and then demonstrated them while explaining them to them.

"The burning of gunpowder in a confined space generates a tremendous thrust, which can send the bamboo tube flying into the sky."

"The principle of the gun barrel is similar to that of the bamboo tube, but the material needs to be stronger to prevent the barrel from being broken by the high temperature and high pressure generated by the burning gunpowder."

Although everyone still didn't understand these words, they had a clearer understanding of the gun barrel.

Du He handed the drawings of the gun barrel to a group of blacksmiths and carpenters, and explained the principles of the Yunlong cannon to them several times before leaving the manor with a tired face.

The next day, Du He came to the manor again and told them the story several times.

Only after this group of people had memorized it by heart did Du He stop popularizing the theory.

The entrance to the manor.

Du He instructed Wang Kang, "Wang Kang, you must apply for the materials needed to develop the artillery in a timely manner, and also find accommodation for the newcomers."

"The development of the Yunlong Cannon is quite dangerous. You should ask the Taoist priests to make the gunpowder smaller."

These Taoist priests are all gods who have been thwarted by huge thunder bombs. Their courage is greater than their age. If they are not restricted, something big will definitely happen.

"As ordered!"

Wang Kang responded respectfully.

After arranging the development of the artillery, Du He went to the Academy of Gewu in the next month to explain to the people from the five departments what they were going to do.

Du He can explain things like springs, refined salt purification, red brick firing, grafting technology and sow postpartum care quite thoroughly, after all, he has been exposed to all these things.

As for the keel drum, papermaking and spinning wheel, he could only provide the craftsmen with a general idea.

As for rubber tires, Du He could only say that there were rubber trees in Jiaozhou and the function of rubber. The specific research and development required craftsmen to try various methods.

Gewuyuan.

In the meeting hall.

Du He summoned Pei Xingjian and the heads of the five departments.

"Everyone, I have already assigned all the tasks to each department. Next, you must assist my craftsmen in producing the various tools."

"It's normal for many things to take three to five years to be completed. You don't have to worry."

There are many research things that the people in the fifth department cannot complete in the short term, so they can only conduct research and experiments in advance.

Even if they cannot accomplish it in their generation, they can leave valuable experience for the next generation.

Everyone responded with serious expressions.

"As ordered!"

They feel anxious because they have too much free time, but they and their craftsmen are also anxious because there are too many things to do.

The days ahead will not be easy!

Du He explained something to them again, and then left the Gewuyuan under the escort of the imperial guards and imperial guards.

in the afternoon.

Du He was reading in the Ministry of Revenue when suddenly Li Shimin's personal eunuch walked in and said something.

"Duke Hanguo, His Majesty summons you to the Liangyi Palace."

"Okay." Du He nodded, then followed the eunuch out of the Ministry of Revenue.

After a cup of tea.

Du He came to the Liangyi Hall. At this moment, in addition to Li Shimin, Li Chengqian, Sun Fujia, Tang Lin and Zhang Xingcheng were also inside the hall.

Not long after, Zhangsun Wuji, Fang Xuanling, Li Ji, Hou Junji and others also came over one after another.

After some greetings.

Li Shimin got straight to the point and said, "My dear ministers, the three divisions have been investigating for a month and have yet to uncover the identities of the five assassins!"

"According to the three courts' speculation, these five people are members of a certain aristocratic family, and their identities are not registered in the Ministry of Household Affairs!"

Sure enough, nothing was found!

After the incident, Du He guessed that the people from the Three Departments could not find out that Changsun Wuji was the mastermind behind it.

Even though Li Shimin and the people from the Three Departments suspected Changsun Wuji, they could not provide strong evidence to prove that Changsun Wuji had the intention to kill Yuan Tiangang.

There was a pause.

Li Shimin said in a deep voice, "To prevent such incidents from happening, I have decided to have the Ministry of Revenue register all the people of the Tang Dynasty, including the tenants, retainers, and slaves of officials and gentry, monks in temples, and refugees who have been taken in."

what!

Want to register all the people?

When everyone heard the news, they all showed expressions of shock on their faces.

Zhangsun Wuji immediately advised, "Your Majesty, no monarch in the past dynasties has ever ordered the registration of soldiers, slaves, monks, etc."

"Your Majesty, please take back your order!"