"Some research institutes that can conduct research in secret places such as factories can be set up in industrial zones, but they are divided into special research areas and kept secret."

"Understood."

While walking, he explained to Yang Wu.

"Mingyue, when you are responsible for the security of your side, you must mobilize the masses, use the masses, and publicize the sense of confidentiality to all ordinary people, so that if there are strangers coming, teach them to ask about the origin of some strangers, etc., and people with strange whereabouts, or people who inquire indiscriminately, report to some village chiefs or patrol and arrest departments as soon as possible." Huo Gang also gave an explanation to Mingyue's side.

In the future, everyone has seen the strength of the Chaoyang masses, and similarly, in this era, Huo Gang's foundation for mobilizing the masses and the people is higher, you must know that the people now worship Huo Gang, and many of what Huo Gang said, the people are really concerned.

"Understood." Mingyue also nodded, it is actually relatively simple to carry out counter-espionage operations in Dahan, at present, no one dares to steal the secrets in the industrial city, Datang will not and cannot for the time being, but it is more likely to be private, after all, these commercial houses, as well as various family gate valves, after seeing the textile machinery and other money-making industries.

It's not inconceivable to take a risk, and there haven't been any cases of espionage yet, but it's not news that they're trying to hire some workers who work in industrial cities.

Huo Gang didn't care about these things, because these workers didn't understand technology, and there were too many technical faults between Dahan's technology and the outside technology, and many technologies were no longer a problem of technical faults.

After the development of die forging and free ends, the basic two-axis machine tools have appeared, and these machines and processing tools are necessary to make new textile machines and other components.

It is no exaggeration to say that in Datang or other places, they can't even make screws now, and they can't produce them if they are given drawings, and the final choice can only be to buy them here.

But even if they can't produce it, Huo Gang can't take the initiative to expose these technologies, these are two different things, the principle of confidentiality and the confidentiality system must be carried out.

While speaking, Huo Gang and the others had already walked to a large research workshop of the research institute, and when they entered the workshop, Huo Gang saw several large cannons at a glance that looked very similar to the style of later generations.

And there are many different artillery components next to it, Huo Gang walked to the side of the gun and took a closer look, the gun is a rear-loading gun, and the rear gun latch uses the spiral gun bolt that has been very common in post-modern times, as well as the wedge-shaped gun bolt.

"Tell me about it." Huo Gang didn't speak, but spoke directly.

"Yes."

"Chief, according to the idea you gave us, we have thoroughly completed the research on the gun bolt, and the casting of the gun barrel is not a problem for us, but we found in the later tests that there is a big problem with the ignition of the artillery, and the propellant you mentioned has not yet completed mass production, and can only be produced on a small scale in an experiment, and the cost is very high."

"And the gunpowder that we can use on a large scale can't hit the ignition, so we haven't developed a rifled gun for the time being. The main thing is that our shells can only fire solid iron balls. Chen Min quickly pointed to the artillery ballistic next to him.

The volume of this shell is not small, Huo Gang took a look, and there were at least a dozen centimeters in diameter of solid iron balls.

"However, because you told us that the more advanced shells should be rifled guns and cylindrical shells, for the time being, we have no way to make rifled guns and cylindrical shells, because we don't have many bronze mines, so we later came up with a way to add a wooden base under the solid iron ball." Chen Min pointed to the second shell and said.

Looking at this second cannonball, Huo Gang was a little surprised, this cannonball was still a solid iron ball, but there was one thing, that is, its bottom was placed on a special cylindrical wooden block about 10 centimeters thick.

The round iron ball is then fixed by a very thin piece of iron in a cross shape, and if you don't take into account the gap between the iron ball and the wooden stock, it already looks very much like a cylinder.

"Then we tested it again, and then we found that with the addition of a wooden stock, the shell could travel a much longer range and its accuracy was actually quite improved." Chen Min said quickly.

Looking at this shell, Huo Gang was a little speechless, if he remembered correctly, this thing actually seems to be available in later generations, and after the wooden cartridge is installed, it is indeed more accurate than a simple iron ball, and the flight distance is farther, the reason is that after it is equipped with a wooden cartridge, the principle of disemboweling is close to the principle of badminton,

As for the gunpowder, they also followed Huo Gang's reminder, and the gunpowder became a sealed cartridge similar to a cylinder.

When firing, the cannonballs are directly stuffed into the shells first, and then into the cylindrical cartridges, which is a bit like the firing method of the main guns of battleships during World War I and World War II in later generations. It's just that this cartridge still needs to be ignited.

"How is the ignition going?" Huo Gang asked curiously. He didn't see a fuse on the cannon for a special ignition, which was supposed to be something they had improved.

"We invented a woodpipe fuse, we sealed a specially blended gunpowder with paper and put it in a woodpipe, this black powder we modified the proportions and the composition of it, and it burned very fast, not too fast and not too slow. In this way, we can easily calculate the time it will take for it to burn for a certain length. Chen Min immediately took a finger-length wooden pole next to him.

"As soon as we lit the woodpipe fuse, we started the timer, and then we inserted it directly into the device reserved for the cartridge, and then we quickly bolted the bolt within the allotted time, and then waited for it to ignite the gunpowder."

"It has been tested more than a hundred times without any problems, and we have tested the burning rate of this gunpowder thousands of times." Chen Min said seriously.

"Not bad." Huo Gang gave them a thumbs up directly, this thing is already very much like a detonator in later generations, but whether it has appeared in history or not, Huo Gang is not clear, but as long as it is easy to use, Huo Gang does not have to pursue the kind of fuse in later generations.

Besides, before the mass production of gunpowder, it was already very awesome to have such an efficient launch method.

It's much more reliable than in history, estimating the distance on the spot, and then cutting the length of the fuse with scissors.

"Test it out." Huo Gang said directly.

"Yes!" Chen Min immediately began to greet the soldiers next to him, these soldiers were transferred from the Tiger Ben Army, and the artillery unit used for training was transferred a total of 500 people.

The whole gun was quickly pulled out of the warehouse, it has to be said that this gun was obviously designed for transportation, there were wheels under it, and not only that, when it was pulled down the test firing training ground, the two steel frames on both sides of it were quickly released, and at the same time the wheels were raised, and it was immediately fixed more stable.

Huo Gang and the others were arranged more than ten meters behind the artillery, and in front of the artillery was a very thick wall, about ten meters high, and about ten meters thick, but it was not reinforced concrete, but the most common city wall in the Western Regions, a city wall of masonry and earth. However, on the other side there is also a steel-concrete wall.

"Ready!" With Chen Min's roar, a group of five artillerymen on this side instantly entered a state of preparation, one box next to them contained neatly arranged shells, and the other box contained a box with medicine cartridges and wooden pipe leads.

"Let's go!" As Chen Min's voice fell, these two artillerymen immediately took out a shell from the side and stuffed it directly into the barrel from behind, while the other artilleryman picked up the cartridge at the same time and rushed directly to stuff it in.

At the same time, an artilleryman immediately took out a special fire fold and directly ignited the woodpipe lead, and then stuffed the woodpipe lead directly into the gap reserved behind the cartridge, with a "bang" sound, the artillery bolt was directly closed, and then with the rapid rotation, the gun bolt quickly returned to its position.

Then the artillerymen next to it had already begun to adjust the angles of the artillery.

Huo Gang probably estimated in his heart, as the artillery ignited the woodpipe fuse, in about 15 seconds, with a loud "boom", the entire artillery instantly emitted a huge fire and explosion.

Then, in the distance, a huge roar of dust erupted from the thick walls.

The people around Huo Gang were all taken aback, most of the ministers here had never seen gunpowder, they didn't know what it was at all, even the red cloud around Huo Gang was in a commotion, it was obviously taken aback, but when it raised its head and looked at it, it quickly quieted down.

Huo Gang observed Huo Zheng and their war horses by the way, although there was a commotion, but they soon quieted down.

It seems that if artillery is used, the artillery training of war horses will also be on the agenda.

"Let's go and have a look." Huo Gang pointed to the distance and said, after speaking, Huo Gang directly turned over and got on the horse.

The others followed, and when they reached the side of the wall, the shot had been aimed at the center of the wall, and now the whole iron ball was fiercely embedded in the wall, and a huge hole had been blasted out around it.

Although the city wall has not yet been shot through and collapsed, a considerable area has fallen from the center of the entire city wall, and a huge pit has appeared in the city wall. Huo Gang was a little staggered, he had never seen the power of modern artillery in his later life, and he didn't know much about this.

But the power of this backward artillery is far beyond his imagination, and this is still a solid shell.