Gunpowder was spread to Europe through war, and the invention of gunpowder promoted the process of world history.

Engels once highly evaluated the influence of gunpowder invention. He said that there is no doubt that gunpowder was introduced from China to India and then to Europe. It was confirmed that China was the place where gunpowder was invented. Gunpowder shook Europe's feudal autocratic rule, and it was Europe that entered the age of hot weapons and bid farewell to the previous era of cold weapons. The knight class that used to win by cold weapons declined. The invention of gunpowder promoted the process of world history. From a long-term perspective, it promoted the development of the European Renaissance.

Of course, Li Yan knew that if he could figure out gunpowder now, if those Westerners attacked the territory of the Tang Dynasty, they would not be afraid of it. They would be indifferent to life and death, and if they were not convinced, they would do it.

"I'm not to be hiding this, I have made some progress in this secret weapon through these Taoist priests. Once these things are equipped on our navy, our navy will definitely be more wings. Since we have said this today, I will naturally have to say good things to you."

After Li Yan finished speaking, he took out a few books from under his seat, hoping that everyone would read it.

First of all, what comes to everyone's eyes is a weapon called a rocket. It binds some flammable substances such as grease, rosin, and sulfur to the arrows. After ignition, it is shot out with a bow to burn the enemy's position. If gunpowder is used instead of general flammable substances, the effect will be much better. Before the invention of gunpowder, a stone thrower was often used to throw stones and grease fireballs to destroy the enemy. After the invention of gunpowder, gunpowder bags were used to throw gunpowder bags to replace stones and grease fireballs.

Everyone was amazed at this thing, and was once again impressed by Li Lan's wonderful ideas.

But what they didn't know was that Li Qing showed them these things, which was quite cautious.

The emergence of gunpowder weapons on the battlefield indicates that a series of changes will take place in military history. The transition from the stage of using cold weapons to the stage of using firearms. The initial form of gunpowder used in weapons was mainly to utilize the combustion performance of gunpowder. The early gunpowder weapons recorded in "The General Yao of Wu Jing" have not yet left the category of arson weapons in traditional fire attacks. With the development of gunpowder and gunpowder weapons, the explosive performance of gunpowder has gradually become excessive.

Because of his previous career, Li Yan still has a little say about this piece. The gunpowder made of potassium nitrate, sulfur, and charcoal powder is called black gunpowder or brown gunpowder. This mixture is very flammable and it burns quite violently. If the gunpowder burns in a closed container, it will explode. When the gunpowder burns, it can produce a large amount of gas (nitrogen, carbon dioxide) and heat. The volume of the gunpowder that was originally very small suddenly expands and increases to thousands of times, and the container will explode. This is the explosive performance of gunpowder. Various firearms can be made using the properties of gunpowder combustion and explosion.

Li Neng's book was indeed summarized by him combining the knowledge of his previous life with many things from this era.

Those gunpowder weapons with different uses are made using the principle of black gunpowder combustion and explosion. The thorny fireballs and poison smoke balls are firearms with relatively less explosion power. In the late Northern Song Dynasty, the firearms with relatively more explosion power, which also appeared in the "thunderbolt cannon" and "thunderbolt" of the sky.

This type of firearm is mainly used to attack or defend cities. When Li Gang of the Song Dynasty defended Kaifeng, he used thunderbolt artillery to repel the siege of the Jin soldiers. The war between the Jin and the Northern Song Dynasty further improved the artillery. The Zhentian Thunder was an iron firearm, an explosive weapon of iron crust. When the Yuan army attacked Nanjing (now Kaifeng, Henan), the Jin soldiers used this weapon when they defended the city. "History of Jin" has the following description of Zhentian Thunder: "Gunpowder erupted, sounded like thunder, heat reached more than half an acre, people and cowhide were broken and there was no trace, and armor and iron were all penetrated." This description may be a bit exaggerated, but this is a true portrayal of the power of gunpowder.

The development of firearms depends on the research and production of gunpowder. Three gunpowder formulas are recorded in "Wu Jing Zongyao". The content of the Datang gunpowder contains sulfur and the nitrate is the same, 1 to 1, 1 to 2 in the Song Dynasty, and even close to 1 to 3. It is similar to the formula in which nitrite accounts for three-quarters of the black gunpowder in later generations. A small amount of auxiliary ingredients are added to the gunpowder to achieve the effects of flammable, explosive, poisonous, and smoke screens. Gunpowder is constantly improved and developed during the manufacturing and use.

Especially in the Song Dynasty in his previous life, the demand for firearms increased. During the reign of Emperor Shenzong of Song Dynasty, the military weapon supervisor was set up to manage the manufacturing of military weapons across the country. The military weapon supervisor hired more than 40,000 workers, and the supervisor divided into ten workshops, producing gunpowder and gunpowder weapons each as one workshop, and occupied a very important position. Historical books recorded the production scale at that time: "On the same day, seven thousand crossbow gunpowder arrows, ten thousand bow gunpowder arrows, three thousand truncannons, and twenty thousand leather gunpowder gunpowder gunpowder weapons." These all promoted the development of gunpowder and gunpowder weapons.

Another thing Li Neng mentioned in the book is a very important weapon in later generations.

In this era, muskets were made of long bamboo poles. Gunpowder was first placed in the bamboo poles, and when fighting, they ignited gunpowder and sprayed it on the enemy. Chen Guishou of the Song Dynasty in his previous life, used "more than 20 long bamboo poles muskets".

Li Yan also mentioned that a kind of storm is made of thick bamboo tubes. The difference between this type of tubular firearm is that the musket can only spray flames to burn people, while the storm is filled with a "sub-nest". After the gunpowder is ignited, it generates strong gas pressure and shoots the "sub-nest". The "sub-nest" is the original bullet. The storm set a precedent for tubular firearms to launch projectiles. Modern guns and cannons have gradually developed from tubular firearms. Therefore, the invention of tubular firearms is another big leap in the history of weapons.

It is particularly worth mentioning that Li mentioned a firearm called "Fire Dragon Out of Water" used in water wars.
Chapter completed!