At this moment, those black things came out with fire and white smoke. Then there was a loud noise.

With a loud bang, more than a dozen black objects the size of pot lids flew towards the city walls, and several of them landed on top of the city.

The Goguryeo soldiers looked at it and smiled. They thought that such a slow flying thing, they just dodged away. It is simply ridiculous to rely on such a weapon to hurt people.

Suddenly, the black stuff exploded. With a loud bang, everything within a radius of 100 meters flew up. The Goguryeo soldiers were all unconscious.

Then, the second row of black things flew up to the tower, and the whole tower was razed to the ground.

The huge power of this weapon was not only the Goguryeo people, but even the Tang army was dumbfounded.

Li Shimin's eyes widened and he asked, "Qin Huaidao, what kind of weapon is this?" ”

Qin Huaidao hurriedly made a report to Li Shimin.

It turned out that Li Su came to the Tang Dynasty for nine years now. Before that, he had not been able to make up his mind to bring gunpowder to the Tang Dynasty.

After he became the crown prince, his horizons widened. He saw that in this era, war was the most frequent, the condition and the most basic means for the survival and development of the country.

The slow progress of the Goguryeo War finally made up his mind and made up gunpowder and explosives.

Making explosives is too simple, and there are ready-made recipes on Baidu. Black powder, one nitrate, two sulfur and three charcoal, needless to say. It is also convenient to manufacture explosives of the nitroglycerin series.

Among them, glycerin, the main raw material, is also very rich. Li Xiaogong has many soap and soap factories under his name, and the by-product of the first process is glycerin.

After the soap was produced, the remaining glycerin had been stored at the request of Li Su. After so many years of accumulation, the storage is large.

The Taobao system mastered by Li Su could not buy metal products, which made Li Su very depressed. This means that the machinery manufacturing industry, with the current level of science and technology industry in Datang, is almost impossible to develop rapidly.

Don't talk about bicycles, cars and airplanes, Datang can't even make a single screw now, let alone bearings and barrels.

The existing level of industrial machining in the Tang Dynasty was still competent for the manufacture of some coarse and bulky utensils.

So Li Su chose the drawings of the two weapons and processed them.

The first is the Flying Thunder Cannon that has just been used.

Flying Thunder is a homemade weapon created by the PLA. He also has an even more well-known name, the Conscienceless Cannon. During the War of Liberation, the People's Liberation Army had very little artillery, and when the weapons and equipment were inferior, the officers and soldiers created a terrifying weapon - an explosive pack launcher with a gasoline barrel as a barrel.

The main body of this weapon, also known as the explosive projectile, is an empty gasoline barrel, which is filled with propellant, and then the explosive package bundled into a disc shape is placed in it, and then the propellant is ignited, and the 10-kilogram explosive package can be ejected to a distance of 150-200 meters.

The caliber of this weapon is absolutely amazing - how thick the barrel is, how big the caliber is, and the powerful blast impact of the huge explosive bag will blow up everywhere it passes, pillboxes, people and horses. Many of the enemies who were blown down often did not find any wounds on their bodies, but they were bleeding from seven holes and were shocked to death. After figuring out this situation, the Kuomintang army simply called this kind of thing a "cannon without conscience".

The second weapon is the Furlong cannon.

The Franc cannon is an iron rear-loading smoothbore cannon, and the whole cannon is composed of three parts: the barrel, the belly, and the sub-cannon. When firing the cannon, the gunpowder projectile is first filled into the sub-cannon, and then the sub-cannon is loaded into the belly of the cannon, and the sub-cannon fire door is ignited for firing. Compared with the Hongyi cannon, the Franc cannon has a thinner barrel, a smaller caliber (the largest one is also under 85 mm), and much lighter. The belly of the cannon is quite thick, and it is generally equipped with a steering rod at the tail of the gun, and there is a front sight and a light door on the barrel.

The Franco cannon has 4 major advantages:

One. The rate of fire is fast. Take the heavy Franc machine cannon "Invincible General" as an example: "Each mother cannon is loaded with a gun cart and 3 gamete guns, and the sub-cannon is loaded into the mother cannon when firing, and taken out after shooting." Reload the second sub-cannon. "According to the actual exercise, the first three shots took less than 20 seconds in total, which was remarkable at the time.

Two. Fast heat dissipation. Because the rear gun is connected to the front and rear, the air circulates and the barrel is thin, which is easy to dissipate heat. Rapid heat dissipation allows the gun to increase its ability to fire sustainedly, and also reduces the possibility of spontaneous combustion of gunpowder.

Three. The capacity of the subcannon is determined. The capacity determines the amount of gunpowder to be charged, so there is no explosion accident due to overloading.

Four. The sub-cannon is cast iron, which can bear a part of the gunpowder pressure, so that the life of the cannon belly is increased, and in addition, the sub-cannon is damaged (mostly cracked), which does not affect the shooting performance of the gun.

After the bombardment of flying thunder artillery, the city tower and the city wall near the city tower were no longer guarded by the Goguryeo people. Except for those who were killed, the rest were also scared away.

The Tang army began to build a ladder to attack the city.

At this moment, the Furlong cannons also began to fire towards the city gate. The cannon fires solid iron eggs. A row of iron eggs passed, and the huge impact smashed the city gate.

Du He led the Flying Tiger Army and entered Anzhou City first. Xue Rengui led the army to follow immediately.

Li Shimin, Li Jing and others didn't care about the battle situation in Anzhou City. They hurried to the artillery positions of the Tang Army and looked at these powerful weapons.

Qin Huaidao was by their side, constantly explaining the questions they raised.

Subsequently, Li Shimin and others came to the city tower. They saw that in addition to the castle towers being razed to the ground, the ground was covered with the corpses of Goguryeo. Many of the soldiers had no scars on their bodies, they were shocked to death.

Li Shimin, Li Jing, Fang Xuanling and others were speechless with excitement.

After a while, Li Jing said: "Congratulations to the emperor, His Royal Highness the Crown Prince has created such a powerful weapon, who else is the opponent of the Tang Army in the whole world?" From now on, Datang will be invincible in the world. ”

Fang Xuanling said with some concern: "The drawings for the manufacture of this weapon and the formula for gunpowder are absolute secrets of Datang. It cannot be spread to other countries. Otherwise, it will be a great disaster. “

Li Shimin asked: "How are the secrecy measures taken?" ”

Qin Huaidao said: "Your Majesty, please rest assured, in accordance with the requirements of His Royal Highness the Crown Prince, we have taken absolute secrecy measures.

All but myself were selected slaves. There's no way they're going to leave the secret base alive. ”

After conquering Anzhou City, Qin Huaidao came to the art troupe and asked to see the crown princess Wu Cong.