"I just met the Prime Minister, and he asked me to take care of Du Hu. When you go back, you can arrange it and let the brothers from Guangnan East Road try their best to rescue him. Be careful." After saying this, Fang Zhixing said again. Although Du Hu also serves as an official in the court, he can also be said to be a man from the martial arts world. Even without Tianxiang's instructions, it is a matter of saving him.

"Prime Minister" Guo Polu was not very excited when he heard this. After all, although Tianxiang is still insisting on resisting Mongolia, the prime minister Lu Xiufu, Zhang Shijie, Chen Yi and others may not be more famous. He just blamed his master for leaving just now and went to see this person. After all, Tianxiang, as the right prime minister of the court, must have been extremely strict. Fang Zhixing must have taken some risks when he went to see him.

Fang Zhixing didn't say much about this, but just instructed, "Jack Zhang Hongfan and I met and killed Li Heng. After the news came back, the Tartars would not give up. You should be careful in the near future."

"Zhang Hongfan, Li Heng" Guo Polu was extremely surprised when he heard this. He immediately became a little confused and asked, "Master, why didn't you kill me?" He hesitated a little and did not ask.

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

Upon hearing this, Guo Polu nodded immediately. If Xin hadn't hated Zhang Hongfan very much, Guo Polu wouldn't have asked. After all, Fang Zhixing is his master, and he will have his own plans for his actions, and he would not need advice from his disciple.

Turning his head and looking at the direction where Zhang Hongfan was, Fang Zhixing said lightly, "This person has an old age with you, Master Xuantong, and you are suffering from a serious illness, so I don't need to do it." He just met Zhang Hongfan and could see that he was suffering from a serious illness. If he had no magic doctor's skill, he would be unable to last a year. With the friendship of his elder brother Xuantongzi, Fang Zhixing would not have to be a villain anymore.

"When he is suffering from a serious illness, what disease did he suffer?" Guo Polu asked. Although he was still wondering why his master and Zhang Hongfan had an old master and he refused to save him, he never asked. What Zhang Hongfan did was doing, and what Zhang Hongfan did was said to him. And the little relationship between Zhang Hongfan and his master must not be deep, and it is not worthy of the master's rescue of the world.

Fang Zhixing said, "The miasma has penetrated into the bone marrow." He sighed quietly, not knowing what he thought. No matter what, Zhang Hongfan can be called a hero of a generation. It is a bit complicated to die at such a young age.

"Miscity" Guo Polu heard this and felt a little dazed, as if he remembered the time when Liu Qiu was pioneering Liu Qiu more than ten years ago. Although he and Fang Yuxia had already explored Liu Qiu once, there were still many unprepared points. Many of the people who brought him for the first time suffered from malaria and other epidemics, and finally had to ask Fang Zhixing for help. Because of this, Fang Zhixing and Li Mochou stayed in Liu Qiu for several years, and kept instructing him and Fang Yuxia in various matters, establishing various sanitary norms, and building cities. Only then did they finally set their feet on Liu Qiu, and after they came to Xiangyang, they successfully unify the entire island. Because of this, Guo Polu remembers a lot of miascity. This kind of thing that was almost extinct in the original densely populated areas is not as easy to deal with, let alone the epidemic diseases transmitted by mosquitoes and other people.

"Yes, he shouldn't have gone south because of the malaria. What a pity," Fang Zhixing said. If the doctor's medical ethics is to say, he could relieve his illness without regard to the patient's identity, but from his own standpoint, he could not do this. If Zhang Hongfan was saved and killed him, Fang Zhixing asked himself but could not do it, so he could only ignore it. "It seems that I am not a doctor after all," Fang Zhixing said mockingly. Even if he has profound medical skills and does not have that kindness, he is not a real doctor.

Guo Polu didn't have so many thoughts. He said hatefully, "It's a good idea to die like this." He still felt a little hateful.

Xin shook his head, and Fang Zhixing didn't explain much. He just stood quietly on the bow of the boat and looked at the sea in the distance. Although he had expected the battle of the Yashan Sea, he was not as sad as he imagined, but it was impossible to say that he had no feelings at all. What he was thinking at this time could not even explain clearly, which was really complicated.

After a long time, seeing the sun was about to set, Fang Zhixing sighed lightly, said, "Let's go", turned around, and asked Guo Polu to order people to leave on a boat.

Guo Polu responded and ordered people to lift the sails and turn around Liuqiu. This kind of ship is more wind-heavy, which is different from the current Song and Yuan navy. It can be said that Fang Zhixing recalled some vague shipbuilding knowledge in his mind and came to explore and discuss it with a group of shipbuilding craftsmen. It was not until a few years ago that he finally formed and became like this. Although two thousand stones are not large, it is limited to manpower, materials, etc., there are not many warships like Liuqiu Island, and most of them are still debugging them. Otherwise, there would not be only such a few ships this time.

It was getting dark, so the group naturally could not turn around immediately, so they found a small island nearby and rested for a night before returning the next day. At night, Guo Polu sent someone to Lu to convey the message, asking the people from Wuyang City to rescue Du Hu, and made another arrangement.

Two days later, Fang Zhixing, Guo Polu and others finally returned to Liuqiu. As soon as they arrived at the island, everyone heard good news, but the method of casting iron mold cannons that Fang Zhixing said was finally successfully explored. With this method, the cannons casting on Liuqiu Island were not only time-saving, but also cheaper, which was far better than the Mongolian Yuan side.

"Once the sky is dizzy, the wind and rain are bad, and the cannon fire and thunder are flying arrows and starrymen." Fang Zhixing remembered the poem he heard from Tianxiang's mouth the day before yesterday and whispered. Cannons and rocket methods have not been too rare since gunpowder was invented. Even Xiangyang City, a primitive musket such as the rifle, had made a giant bamboo tube as the gun body, and the gunpowder and bullets are loaded inside. Therefore, the principle of artillery can be said to be no secret. During the Yashan naval battle a few days ago, the Mongols' navy also used gunpowder weapons such as cannons. However, the power of the cannons is almost no sight, so it is more used as a cannon. The main method of naval battle is to grab the ship on the side 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 firearms in front of them. Fang Zhixing also learned from them that the firearms had developed to this point. Since then, he began to study artillery with these people and gradually standardize it. It has become a weapon that can be used in actual combat, especially in naval battles. Over the years, it has achieved some achievements. However, it is still difficult to talk about large-scale manufacturing. The technology is

Secondly, the most important point is the copper material required to cast cannons. Nowadays, copper is mostly used for casting coins, but copper is mainly used for casting coins. Therefore, each copper cannon cannon cannons are not many, let alone can meet the needs of casting guns. If iron casting cannons is used, problems such as pores and sand holes are likely to occur. On the contrary, it is a death-driven thing. Therefore, Fang Zhixing and others have always been trapped here and cannot cast cannons on a large scale. The reason why Fang Zhixing asked these people to explore the iron mold casting cannon method is also because of this.

After hearing the good news, Fang Zhixing, Guo Polu and others arrived at the place to cast the cannon. Seeing this, the craftsman at the host immediately introduced in detail and said, "Casting cannons with iron molds is indeed faster and stronger in the past. However, the cast iron cannons are still a bit undustable and dangerous. Therefore, I discussed it with everyone and still thought that it is better to have an iron-hearted copper-body cannon. The key points are still."

"It's still necessary to use copper, right?" Fang Zhixing said. Since he wanted to develop artillery and seek islands from the flow, he naturally had to make the artillery technology unmature and make it impossible for the Yuan Dynasty to pursue it all at once. Otherwise, people from the Yuan Dynasty could explore and copy it when they saw it, which would enhance the enemy's strength. The Qing Dynasty, which was closed and self-defense, had a stronger pioneering nature and a stronger acceptance of firearms. The first cannon unearthed in later generations was built by the Mongolian Yuan court twenty years later. Once he learned that artillery was a powerful weapon that was better than Huihui cannons.

The ancients would never let it go. Therefore, in addition to improving the hollow mud mold casting gun method, iron mold casting gun method, iron core copper body casting gun method, pure copper manufacturing method, pure copper manufacturing method, etc., Fang Zhixing also standardized the body tube, caliber, diameter, rifle, sightseeing gate, gun stand, turret, etc. of the cannon, and continuously improved the gunpowder formula he knew, developed the weight, charge, etc. of the artillery shells, and developed solid bullets, flowering bullets, shotguns, etc. that later heard of, and formulated corresponding artillery techniques. Now, it is only a little successful, and it will take some time to truly invest in actual combat.

The craftsman nodded immediately when he heard this. He also knew that Liu Qiu was not rich in financial resources and lacked copper materials, but the iron cannons today really cannot reassure people. The most reliable one is the so-called iron-core copper-body cannon. However, although this method consumes a lot less money, it still costs a lot. Liu Qiu Island is difficult to cast on a large scale. Fortunately, a new batch of copper materials was obtained a few days ago, which can be supported for the time being.

The iron cannon could not be put into practical use for a long time, but Fang Zhixing did not blame it. The technological progress has always been accumulated bit by bit. These people were able to explore the method of iron core copper body and iron mold casting cannons, 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 special gun steel, the artillery in later generations also needed equipment such as giant hydraulic presses, which was not possible in a moment. In today's situation, we can only use the iron core copper body cannon first.

"The method of casting iron cannons can be continued to explore in the future. Let's start building iron-core copper-body cannons in the future. The cannons that were verified before can be used were placed on the forts in Penghu to guard against the Tartars. The Song Dynasty has been destroyed, but I am afraid that the Tartars may pay attention to Liuqiu in the future, so they must be prepared first." Fang Zhixing said. Penghu is Liuqiu's first line of defense and the most important transfer station. Liuqiu has spent a lot of effort on the surface in recent years. Nearly half of the power of Liuqiu Island's navy is there.

Hearing this, everyone said that. The battle of Xiangfan had already brought Liuqiu Island into the sight of the Mongols. Over the years, Liuqiu recruited refugees everywhere, and many people knew about this place. If the Yuan Dynasty court did not know, it would be a bit strange. Now that the great enemy of the Song Dynasty has been completely eliminated, it is not impossible for the Mongols to send a navy to attack Liuqiu. Not to mention Zhang Hongfan's navy, after the failure of the conquest of Japan five years ago, the Mongols had been building warships, and now there were more than 3,000 ships. If all of these ships were sent to conquer Liuqiu, the consequences were unpredictable. Therefore, the matter of artillery ships was urgent. Fortunately, the technical preparations had been initially completed, and a batch of warships were built, and now we can start trying.

"Is the ship sent to Luzon back? Is there any news?" Fang Zhixing asked again. Since he calculated the copper materials needed to cast the cannon, he sent people to collect them from many places. In addition to collecting copper ware on the mainland, he also collected them from the surrounding islands. The most important place was Luzon. First, the island was very close to the river, and many Chinese moved to him; second, Fang Zhixing vaguely remembered that there seemed to be many copper mines on the surface, which could be said to be a treasure land. Over the past few years, he has been sending people to explore and want to obtain the copper mines on the surface.

"I'm back, I've already come back, I've brought a lot of copper materials back," the man said happily. If it weren't for the copper materials brought back by these people, they wouldn't have chosen the iron-core copper-body cannon. Although I don't know if copper ore could be found in Luzon, the copper materials brought back alone would be enough for Liu Qiu to cast a hundred cannons and could meet the temporary needs.

"It's true," Fang Zhixing raised his eyebrows and said. After three lifetimes, these people understood the meaning of copper better. Once there was copper, Liu Qiu could not only cast cannons on a large scale, but also mint coins on a large scale. Not only could he buy more materials, but he could also disrupt the economy of the Yuan Dynasty. If used well, he could also accelerate the decline of the Yuan Dynasty. The significance was no less than hundreds of cannons.

Seeing Fang Zhixing showing 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 they are far away from overseas and in deep mountains and forests. There is so much inconvenience in mining, and I don't know when it will be transported back." She and Fang Yuxia did not go to watch this Yashan Battle, and stayed on Liuqiu Island.

Haha, Fang Zhixing said, "If you don't have a year, you won't have a ten-year plan? As long as you explore the place, you can always mine it. At that time, Liuqiu can really take off." As he stared at the north, he seemed to think of the scene 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. In his lifetime, he would definitely see this scene to be continued.

PS Everyone says they want to cast cannons, so I'll cast them too, but the technology tree is not that easy to climb. This is just a little bit short. I'll forgive me for the shortcomings of the book friends.

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Chapter completed!