"I met with Prime Minister Cheng just now, and he asked me to take care of Du Hu. Go back and make arrangements for you to let the brothers on Quang Nam East Road try their best to rescue him, you must be careful. After saying this, Fang Zhixing said again. Although Du Hu is also an official in the imperial court, he can also be said to be a person from the rivers and lakes, even if there is no Tianxiang's instructions, it is the right thing to save him.

When the "Prime Minister" Guo Poyu heard this, he was not very excited. After all, although today's Tianxiang also insists on resisting Mongolia, Xiang Lu Hideo, Zhang Shijie, Chen Yi and others are not necessarily more famous. He just blamed himself for his master leaving just now and went to see this person. After all, Tianxiang, as the right prime minister of the dynasty, must have been extremely tightly guarded, and Fang Zhixing must have taken a risk when he went to see him.

Fang Zhixing didn't say much about this, but just instructed, "I met with Zhang Hongfan and killed Li Heng easily, after the news is transmitted back, the Tartars will definitely not give up, you should be careful in the near future." ”

"Zhang Hongfan, Li Heng" Guo Poyu was extremely surprised when he heard this. Immediately, he was a little puzzled, and asked, "Master, why don't you kill it?"

"Don't kill Zhang Hongfan" Fang Zhixing didn't know what this disciple thought, so he took his words and said.

Hearing this, Guo Poyu immediately nodded. If it weren't for the fact that he hated Zhang Hongfan very much, Guo Poyu would not have asked. After all, Fang Zhixing is his master, and he has his own plan for how to act, and he doesn't need to be taught by his disciple.

Turning his head to look in the direction where Zhang Hongfan was, Fang Zhixing said lightly, "This person has an old relationship with your Xuantong master, and he is seriously ill, so he doesn't need me to do it." He met Zhang Hongfan just now, and he could already see that he was seriously ill, if there was no miracle doctor to heal him. I'm afraid it won't be able to survive a year. With a little friendship with his senior brother Xuantongzi, Fang Zhixing can't be a villain anymore.

"He is seriously ill, so what disease does he have?" asked Guo Poyu. Although he still wondered why Uncle Shi and Zhang Hongfan had an old master and still didn't save him, he didn't ask after all. Zhang Hongfan did it. It seemed to him that it was a word. And the relationship between Zhang Hongfan and his uncle. Presumably, it won't be deep, and it is not worth the master's rescue at the risk of the world's disapproval.

Fang Zhixing said, "The miasma has penetrated deep into the bone marrow," he said and sighed faintly, not knowing what to think. No matter what, Zhang Hongfan can be called a generation of heroes, and he is about to pass away at such a young age, which makes Fang Zhixing's heart a little complicated.

When Guo Poyu heard this, he was in a trance for a while, as if he remembered the time when he was pioneering more than ten years ago. At that time, although he and Fang Yuxia had already explored Liuqiu once. However, there were still many unpreparedness, and many of the people who were brought over for the first time suffered from miasma and other epidemic diseases, and finally had to ask Fang Zhixing for help. Because of this, Fang Zhixing and Li Mochou stayed in Liuqiu for several years, and they have been guiding him and Fang Yuxia in various matters, establishing various health norms, and building a city, so that they finally established a foothold in Liuqiu, and later brought in the people of Xiangyang, and successfully unified the whole island. Because of this, Guo Poyu remembers the miasma very well. This kind of thing, which is almost extinct in the original densely populated area, is by no means as easy to deal with as similar, let alone mosquito-borne diseases.

"yes, miasma, he shouldn't have gone south. It's a pity," Fang Zhixing said. In terms of the doctor's ethics, he can relieve his pain regardless of his status as a patient, but from his own standpoint, he cannot do so. And if Zhang Hongfan is saved and then killed, Fang Zhixing can't do it if he asks himself, so he can only turn a blind eye. "It seems that I am not a doctor after all," Fang Zhixing laughed at himself. Even if he is a profound doctor and does not have that kind of benevolence, he is not a real doctor.

Guo Poyu didn't have so many ideas. Hate and hate, "Such a traitor, such a death is cheap for him" words. Still a little hateful.

Xin shook his head, and Fang Zhixing didn't explain much. Just stand still on the bow of the ship, looking out at the sea in the distance. The Battle of Yashan Sea, although he had expected it in his heart, and he was not as sad as he imagined, but it was impossible to say that he was completely untouched. What he was thinking at this time, even he couldn't explain clearly, it was really complicated.

After a long time, seeing that the sun was about to set, Fang Zhixing sighed lightly, said "Let's go" turned around and asked Guo Poyu to order someone to sail away.

Guo Poyu answered, ordered someone to pull up the sails, and turned around and begged. This kind of ship is heavier in wind, and the Song and Yuan sailors are different from today, it can be said that Fang Zhixing recalled some vague shipbuilding knowledge in his mind, and explored and discussed with a group of shipbuilders, and it was not until a few years ago that it was finally finalized and became like this. Although 2,000 stone is not a big one, it is limited to manpower, materials, etc., and there are not many warships such as Liuqiu Island, most of which are still being debugged, otherwise, there will not be only a few ships this time.

It was getting dark, and the group naturally couldn't turn around immediately, so they found a small island nearby, rested for the night, and then had to return the next day. At night, Guo Poyu sent someone to Lu to deliver the news, so that the people of Wuyang City could rescue Du Hu, and arranged it again.

Two days later, Fang Zhixing, Guo Poyu and others finally returned to Liuqiu, and as soon as they arrived on the island, everyone heard a good news, but it was the method of casting cannons with iron molds that Fang Zhixing said, and now it has finally been successfully explored. With this method, the cannon cast by Liuqiu Island is not only more time-saving, but also less costly, and it is far better than that of Meng Yuan.

"Once the sky was dark, the wind and rain were evil, and the artillery fire, thunder, flying arrows and stars fell. Fang Zhixing remembered the verses he heard from Tianxiangkou the day before yesterday and whispered. The method of artillery and rockets, since the invention of gunpowder, is not too rare. Even the primitive musket of the assault musket, Xiangyang City also made a huge bamboo barrel as the body of the gun, which was filled with gunpowder and bullets, so the principle of the artillery can be said to be no secret. A few days ago, during the Battle of Yashan, the Mengyuan Navy Division also used artillery and other gunpowder weapons. But today's artillery has almost no crosshairs, and its power has increased, so it is more used as a trumpet gun. The most important way of naval warfare is still to seize ships and fight closely.

As for the artillery on Liuqiu Island, it is also thanks to the skilled craftsmen who moved to Liuqiu after the Battle of Xiangfan, including the people who made the assault rifles in front of them. Fang Zhixing also learned from them that firearms at this time had developed to this point. It was only then that he began to study artillery with these people and gradually normalized it. It becomes a weapon that can be used in real combat, especially in naval warfare. Over the years, there have been some achievements. But when it comes to large-scale manufacturing, it is still difficult. Technology is secondary. The most important point is the copper required for casting cannons. Nowadays, most of the cannons are cast with copper, but copper is mainly used to cast money, so every copper cannon can be said to be cast with money. There is not much copper ore to seek, let alone meet the needs of casting cannons, and if you use iron casting cannons, it is easy to have problems such as porosity and sand holes. On the contrary, it is a life-urging thing, so Fang Zhixing and others have always been trapped here, unable to cast cannons on a large scale. The reason why Fang Zhixing asked these people to explore the iron mold casting method is also because of this.

After hearing the good news, Fang Zhixing, Guo Poyu and others arrived at the place where the cannon was cast. Seeing this, the presiding craftsman immediately introduced it in detail, and said, "It is true that casting cannons with iron molds is faster and stronger in the past." But the cast iron cannon. It's still a little undurable, and it's a little dangerous. Therefore, Lao Yu discussed it with everyone, and still felt that it was better to have an iron core copper cannon. The gist of it, or still"

"You still need copper, right?" Fang Zhixing said. Since he wanted to develop artillery, Yiliuqiu Island was far inferior to the financial and material resources of the Yuan Dynasty, so he naturally wanted to make the technology of artillery immature and the Yuan Dynasty unable to chase it all at once. Otherwise, the people on the side of the Yuan Dynasty will be able to explore and imitate it when they see it, which will enhance the enemy's strength. Compared with the closed and self-defended Manchu Qing Dynasty, the Mongols were much more pioneering and more receptive to firearms. The first cannon unearthed in later generations was built by the Mengyuan court twenty years later. Once you know that artillery is a siege weapon that is better than return artillery. The Mongols will never let go. Therefore, Fang Zhixing not only perfected the hollow mud mold casting method, iron mold casting method, iron core copper body casting method, and pure copper manufacturing method. In addition to the method of casting cannons such as the pure iron cannon casting method, it also standardizes the barrel, caliber, double diameter, rifling, front sight, illumination door, gun carriage, and turret of artillery, and constantly improves the gunpowder formula that he knows, develops the weight and charge of the cannonball, and develops the solid bullets, flowering shells, shotguns, etc., which have been heard of by later generations, and formulates the corresponding artillery techniques from there. So far, it is only a small success, and it will take a while to really put it into actual combat.

The craftsman nodded when he heard this. He also knows that the flow of money is not abundant, and the copper material is even more lacking, but today's iron cannon is really not reassuring, and the most secure is the so-called iron core copper cannon. However, although the cost of this pure copper cannon is much smaller, it is still very expensive, and it is difficult to cast on a large scale on Liuqiu Island today. Fortunately, a few days ago, a new batch of copper was obtained, and it can be temporarily supported.

The iron cannon has not been put into practical use for a long time, but Fang Zhixing did not blame, technological progress has always been accumulated bit by bit, these people can find out the method of casting the cannon with an iron core copper body and an iron mold, which can be said to be hundreds of years ahead of today's era, and it is really impossible to force it. As far as he knows, in addition to the need for special cannon steel, the artillery of later generations also needs equipment such as giant hydraulic presses, which is really not something that can be done in a moment, and the current situation can only use iron-core copper cannons first.

"The method of casting iron cannons, you can continue to explore in the future, and start to make iron core copper cannons in the future. The previously verified cannons were put on the batteries on the Penghu side to guard against the Tartars. The Song Dynasty has been destroyed, and I am afraid that the Tartars may pay attention to Liuqiu in the future, and they must be prepared first. Fang Zhixing said. Penghu is the first line of defense and the most important transfer station for Liuqiu, and Liuqiu has spent a lot of effort in the face over the years, and nearly half of the forces of the sailors of Liuqiu Island are there.

Hearing this, everyone should be. The battle of Xiangfan, has made Liuqiu Island into the sight of the Mongols, these years Liuqiu everywhere to recruit displaced people, but also let many people know about this place, if the Yuan Dynasty court does not know, then it is a little strange Now the Song Dynasty This great enemy has been completely eliminated, and it is not impossible for the Mongols to send sailors to attack Liuqiu. Not to mention Zhang Hongfan's sailors, after the failure of the conquest of Japan five years ago, the Mongols have been building warships, and now there are more than 3,000 ships. Therefore, the matter of artillery ships is urgent. Fortunately, the preparation of technology has been preliminarily completed, and a number of warships have been built, and now it is ready to be tried.

"Is the ship sent to Luzon back, is there any news?" Fang Zhixing asked again. Since calculating the copper needed to cast the cannon, he has sent people to collect bronze from various sources, in addition to collecting bronze objects on the mainland, that is, on the surrounding islands. The most important place is Luzon. The first is that this island is very close to Liuqiu, and there are many Chinese who have moved to it, and the second is that Fang Zhixing vaguely remembers that there seem to be many copper mines, which can be described as a treasure land. In the past few years, he has been sending people to explore, hoping to obtain the copper ore of the surface.

"I'm back, I'm back, I'm back, I've brought back a lot of copper," the man said with joy. If it weren't for the copper materials brought back by these people, they wouldn't still choose the iron-core copper cannon. Although it is not known whether copper mines can be found in Luzon, the copper materials brought back alone are enough for Liuqiu to cast a hundred cannons, and can also meet the needs of the moment.

"That's really the case," Fang Zhixing raised his eyebrows and said. After three lifetimes, he could understand the meaning of copper better. Once there was copper, Liuqiu could not only cast cannons on a large scale, but also mint money on a large scale, not only to buy more supplies, but also to disrupt the economy of the Yuan Dynasty. If it is used well, it can also accelerate the decline of the Yuan Dynasty, and its significance is no less than hundreds of cannons.

Seeing that Fang Zhixing rarely showed joy, Li Mochou smiled and said, "Of course, will we still lie to you." It is said that there may be copper mines there, but it is far away from overseas, and it is deep in the mountains and dense forests, so it is inconvenient to mine, and I don't know when it will be shipped back. "In this Yashan Sea Battle, neither she nor Fang Yuxia went to watch, and stayed on Liuqiu Island.

Haha laughed, Fang Zhixing said, "If it doesn't work in a year, it won't work in ten years, as long as you explore the place, you can always mine it." At that point, Liuqiu will really be able to take off," he said, gazing north, as if thinking of the sight of expelling the Tartars. The two news he heard today made him finally convinced that it was no longer a dream to drive the Tartars out of the country in advance, and he would be able to see this scene in his lifetime

ps Everyone said they wanted to cast a cannon.,I'll cast it too.,But the technology tree is not so easy to climb.,It's just a rough write.,Deficiencies.,Please forgive me.