Hearing Wang Hongyu's words, the two of them seemed to grasp a life-saving straw, turned around abruptly and kowtowed desperately: "Live!" I want to live! ”

The head knocked like pounding garlic, why did you bother in the first place?

"Want to live? Then tell me in detail about the process of adding iron cores when you cast copper cannons. ”

Wang Hongyu doesn't plan to hide the technology of the iron-core copper cannon, Huang Kezhang and Xu Guangqi also belong to the kind of powerful people who know a lot about technology and hide that they will be discovered sooner or later.

"This ......"

"What? Do you really not want to live? ”

The two of them didn't hide it, and they talked about it all in detail.

It turned out that in order to seek personal gain, they first cast the gun core with wrought iron, and after the gun core cooled, they wrapped the gun core with a casting mold, and poured a layer of bronze on the outside of the gun core in the casting mold. This is faster and looks like other bronze cannons.

"The iron cannon itself can also be used, how are the two cannons you cast, how are the cast iron?"

Wang Hongyu's tone was very serious, how they answered this question actually determined how he planned to treat them in the future.

"Alas...... Because when rushing to work, the mud film was not repeatedly polished when casting the gun core, it is estimated that there are some cracks and gaps, and the iron is not expensive and good, so it is ......"

"So, these two cannons can't be used ......"

The first one honestly said about the casting situation, and the latter honestly admitted the result.

"Then you guys cast well, is there a way to make an iron-core copper cannon that can be used in actual combat?"

"Yes! Enough time, with good materials, we could! ”

"That's right! What can be made! ”

The two swore they could make it.

Wang Hongyu made up his mind and gave Huang Kezhang and Xu Guangqi a look, and then look at these two people, they look similar, and they are estimated to be brothers, relatives, etc., it is really not easy to go to sea to master this technology, and it is really a waste to kill them.

"You will be spared the death penalty, but the living sin will be forgiven! He was used as a coolie in the army. Only here is the Sichuan Army Zhou Guerrilla and Wang Jiangzong here, you can live, otherwise you will kill and teach the world! "Huang Kezhang, the secretary of the Criminal Department, is not angry and self-assured, and now he is showing anger, which is even more terrifying.

The two finally lived, and they were moved to cry and kowtow, vowing that they would never dare again in the future.

Wang Hongyu asked, "What's your last name?" Where did it come from? ”

The one with a lot of wrinkles on the face of the two replied: "Our surname is Lu, we are from Fujian, and I am old. ”

Another chimed in: "I'm a senior. ”

"My name is Lu Laoqi."

"My name is Uncle Lu."

All right~

After chatting for a while, the uncle and nephew of the Lu family were very good, and they left a specially cast iron-core copper cannon, which happened to let Li Tiezhu have two subordinates.

Li Tiezhu can also learn from the uncles and nephews of the Lu family and other artillery craftsmen, so that the gunners can explore and manufacture artillery according to this method.

In fact, the casting method of the iron-core copper cannon was an invention in the late Ming Dynasty, and only the casting method was superior to that of Spain, Portugal and the Netherlands in the same era. In the case of workmanship can be achieved, it is very leading in the world.

Compared with the copper cannons widely used in Europe, as well as the lighter Gustav "leather cannon", the iron-core copper cannon has the advantages of firepower and the advantages of saving materials and making it easy to maneuver. Relatively saving expensive copper, reducing the weight of the gun, while the higher melting point of wrought iron and better wear resistance improve the life of the gun.

This technology has a significant impact on the actual battlefield.

During the same period, before and during the Thirty Years' War in Europe, the proportion of artillery was even lower than 100 years earlier, due to the heavy weight of bronze cannons, the increasing size of armies, and the increased demand for logistics and mobility.

It wasn't until Gustav, the king of Sweden and a generation of military gods, came up with the "leather cannon", a bronze and leather mixed light field gun, that the proportion was increased again.

However, the proportion and variety of artillery in the Songjin War of the Ming and Qing dynasties were high, and the situation of large-scale artillery battles between hundreds of franc machines, general cannons and 37 red-coated cannons was rarely achieved in Europe in the same era.

This is more or less included, the red-coated cannon and the general cannon at the end of the Ming Dynasty are the reasons why the iron-core copper cannon is relatively easy to maneuver.

Wang Hongyu didn't expect that this time, after his special training, he would be cut off by mistake.

Not only that, but also a high probability to solve the tragedy of the cannon explosion during the fierce war in Shenyang.

In this way, the balance of the battle against Nurhachi is being reversed little by little, and I really don't want the other party to occupy the two big cities of Shenyang and Liaoyang in Liaodong. If they are not allowed to occupy these two big cities, the Ming army will gather in Liaodong, and they can also rely on local supplies, otherwise they will have to levy Liaodong salaries, and most of the food, weapons, and supplies will have to be transported from the Guannei......

That's a different kind of war.

However, there are also two sides to the matter, and now a large number of soldiers and horses from the south and the northwest have gathered and eaten a lot of grain from the hands of the people of Liaoyang and Shenyang, and the high degree of local dissatisfaction with the guest soldiers is also an objective situation.

Nurhachi and Huang Taiji seem to be very good at using this......

There is a long way to go, and Wang Hongyu knows that the current preparation is not enough, especially since he is not the opponent of Nurhachi and Huang Taiji.

What special training will you do next?

Although I really want to learn martial arts from Zhang Shenwu, I have arrived in the army, and the most important thing is command, strategy, and tactics.

With firm determination, he came to Zhou Dunji's camp again.

When I first arrived here, I saw Huang Kezhang, Xu Guangqi, Chen Ce, Tong Zhonghua, Qi Jin, Qin Liangyu, Zhang Shenwu, and Zhou Dunji inspecting the armies together.

After Wang Hongyu clasped his fists and saluted, he followed and walked at the back of the queue.

Huang Kezhang, as the secretary of the Criminal Department, was very, very heavy in the case of the serious absence of officials in the late Wanli period, but even so, he made a special trip to the southern army camp and specially sent cannons and personnel, in fact, to express that he would try his best to support this strong army.

There were frequent party disputes in the imperial court, and some people squeezed their heads to attack dissidents; Some people chase after the wind and catch the shadows, and when the wind blows, they will attack them like vultures on the grassland; There are also some people who are confused and don't do anything for the corpse vegetarian meal.

Huang Kezhang is completely different, insisting on being in the middle, impartial, focusing on doing things and respecting generals and craftsmen, and in the future, he will have the reputation of "being an official without taking refuge, establishing a dynasty without building a party, and disregarding selfishness".

He stood up for these southern troops, Yao Zongwen, Ma Wenqing and other ghosts, so they didn't dare to make trouble easily.

Maybe there is a hint from Emperor Wanli that there is today's result, but among the current important ministers in the court, only Huang Kezhang is willing to put down his body and contact the martial artists.

After his inspection, he said that he would do his best to allocate food, winter clothes, gunpowder, and weapons, and everyone knew that the imperial court's finances were not easy, and it was very rare to have such support.

Huang Kezhang was about to return to Beijing, and turned to everyone: "The old man is waiting for you in the capital!" ”