"Father, there's a dead rat here too!" Jiang Yin stopped by the pyre and shouted loudly. This is the fifth dead rat they have found.
In Yu Village on the outskirts of the county, several peasant families have been infected with typhoid fever in a row. According to common sense, everyone would avoid it, even the witch doctor Shenhan could not be invited. The Jiang family and their sons came over early and carefully searched the nearby houses. Sure enough, several dead rats and two domestic dogs were found in a row near the patient's house, which also died inexplicably.
"Is there really an epidemic?" Jiang Taiyi heard the sound and rushed over. Although he was nearly seventy years old, his figure was not clumsy, and he was still in high spirits.
After years of practicing medicine, Imperial Physician Jiang's eyes were so vicious, he could see at a glance that there was no trauma on the dead rat. Obviously not injured, but a large number of deaths, other than the "epidemic object" that Liang Feng said, Imperial Physician Jiang really couldn't think of a better answer.
Jiang Yin took a step forward and wanted to take a closer look at the dead rat, but was stopped by Jiang Taiyi: "Don't be careless. Liang Zixi said that this thing can be transmitted to people through blood-sucking bugs. If there is a flea , but it's dangerous."
It's only April now, and there are no mosquitoes yet. No wonder typhoid fever is high in summer and autumn. If the "epidemic" is really carried by mosquitoes, shouldn't it break out in summer
"How many mosquitoes, rodents and ants are there in the world, and if the disease is really attached to this kind of thing, how to prevent it?" Jiang Yin frowned and asked in a low voice.
Imperial Physician Jiang shook his head, but he couldn't think of a way. If there is no way to prevent it, even if you know the source of the epidemic, what is the use
With a sigh, he said, "Wait for the news from Da'er. Since the matter of the epidemic was taught by the Buddha in a dream, that Liang Zixi should know how to solve it."
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Hurrying all the way, it only took six or seven days to get from Jinyang to Liangfu, but when Jiang Da saw Liang Feng, he was still surprised. His father had clearly diagnosed and treated him before, why not only did he not get better, but he was so sick? The person on the couch had sunken eye sockets and was as thin as a wood. No matter how amazing his face was, he couldn't hide the heavy sickness on his body. Could it be that the medicine is not symptomatic, what happened
"How did Liang Langjun become so sick!" Jiang Da didn't care about etiquette, stepped forward quickly, grabbed Liang Feng's wrist, and felt his pulse.
"In the past few days, the danshi has been activated, and it has been wasted." Liang Feng's answer was gentle and polite, and he could not hear much emotion.
After closing his eyes for a long time, Jiang Da also let out a long sigh: "It's true that Danshi is activated, and most of them will suffer from such symptoms. Medicine stones are difficult to cure, so you can only suffer. However, you have never taken it without authorization. It is also symptomatic, and after this month, the body will gradually recover."
With that said, Jiang Da glanced at the man lying on the couch again. You know, there are many patients who are addicted to Wu Shi San. Once Danshi attacks, no matter how high your status and how good demeanor you are, you will inevitably twitch all over your body and bark wildly. Even minor ones can be violent, insane, and inaccessible.
Because of the terrible symptoms of Danshi attacks, those who take Wushisan are rarely able to cut off drug addiction. Even if the doctors told them thousands of times, they would take the medicine again, killing their own lives. However, the person in front of him, even if he was only half ill, never recovered. What is even more rare is that his fingers have been trembling slightly, but the clarity of his eyes has not been reduced by half, and he can answer questions fluently without any gaffe.
This is not something ordinary people can do. No wonder he can make Wang Zhongzheng so rewarded.
Seeing Jiang Dana's slightly approving expression, Liang Feng sighed in his heart. What he wants is not the admiration of others, but to stop this damn withdrawal reaction. I haven't been able to eat or sleep well these days, my hands never stop shaking, and I have to pretend that nothing happened to comfort those close to me. Fortunately, the hidden dangers of the Liang Mansion have been eliminated one by one, and the pace of life in ancient times is frighteningly slow, otherwise he will be exhausted.
However, he did not doubt what the young doctor said. If there is any placebo or special medicine for Wushi San, can it still be poisoned for a hundred years and harm generations of people? It seems that there is no other way than to fight hard.
With a slight snort, Liang Feng replied, "I feel at ease with Brother Jiang's words."
Looking at Liang Feng's appearance, Jiang Da couldn't help but add: "But Liang Langjun can't be careless, he has to rest well recently and eat some medicinal food. By the way, Wang Zhongzheng also asked me to bring some medicinal materials this time. There are a few flavors in it that can soothe the nerves, and I will write a recipe in a while and mix it into a fragrance powder, which can also help you fall asleep at night."
"It's so good, thank you Brother Jiang." Liang Feng's eyes lit up, he could have some sleeping pills to make him less nightmare.
Seeing the relaxed expression of the person in front of him, Jiang Da also felt a little more relaxed in his heart, coughed lightly, and said, "This time I have something to do, stay in Tongjiao and send me to diagnose Liang Langjun. Except for the oral administration before. In addition to the medicines, acupuncture and medicated baths are also used to help detoxify the medicine. However, Liang Langjun is too weak, and he is afraid that he will need to recuperate for a few days before he can use acupuncture. "
Unexpectedly, this doctor Jiang is not only a follow-up consultation, but also serves as a physical therapist. This treatment is much more than the last time! Did the letter that they sent make a difference, or did they uncover the key question about the source of the plague's transmission
As soon as his mind turned around, Liang Feng smiled and said, "I didn't expect Imperial Physician Jiang to come here. I don't know what the 'epidemic' said last time. Have you found any clues?"
Jiang Da coughed lightly: "To be honest, I came to Liang Mansion this time not only to diagnose Liang Langjun, but also for the 'epidemic' matter. My father and brother have been searching around the county town recently, and they are indeed suffering from typhoid fever. A dead mouse was found in the patient's home. In fact, a long time ago, I suspected that the epidemic was not just foul air. Those nobles and dignitaries all avoided typhoid fever like snakes and scorpions, but even if there were no patients around, they would unknowingly contract typhoid fever, which is really suspicious Now that I saw the dead rat, I suddenly realized."
This is also where Jiang Da is most interested in the theory of epidemics. Logically, as long as you don't come into contact with typhoid patients and keep your door closed, you can prevent infection. However, after an epidemic broke out in one place, no matter the rich or the poor, the patients always appeared one after another, and it was hard to prevent. Even if they move out, some people will be infected one after another. Many people say that this is the plague, but now that I think about it, I am afraid that there are sick mice in the team, and mosquitoes suck the blood of the patients and spread it to other people. It's just to prevent contact between people, who would have thought that there are still these little voles at work
"But if the plague really comes from insects and rats, how can we eliminate the plague?" This is what Jiang Da is very confused about. Could it be that the Buddha still passed down some secret methods to kill all insects and rats
"Just control the source." In the past few days, the pain was unbearable. In order to divert his attention, Liang Feng also carefully recalled the key matters about epidemic prevention. Now that someone who understands medical skills has finally arrived, he naturally picked up his energy and said, "First of all, you can sprinkle lime water made from lime in the affected area and sprinkle it on the place where the patient has been. The lime water must be used immediately. , can't be left for too long."
"Lime? But the kind of white ash that builds tombs?" Jiang Da was stunned for a moment, and immediately understood. The so-called lime is white ash. There are also many ash training grounds among the people, which produce white ash for wall painting and tomb building. This thing can prevent insects, and I want to have this effect.
Liang Feng nodded slightly: "Not only can lime kill insects and lice, but it can also be put into water to get rid of mosquito larvae.
Quicklime mixed with water can generate heat, and too much seems to be harmful to the human body. But in the face of the plague, these little things are nothing. He continued: "There are still people who died of illness. It is best to burn their bodies. If not, use white ash to cover them and bury them as soon as possible. All clothes that have been contaminated with feces, vomit, and blood from patients should also be burned."
Jiang Da could naturally understand that in the event of a serious disease such as smallpox, it is also necessary to burn the clothes contaminated by the patient. As for burning the corpse, it's a bit difficult, but being able to bury it with white ash is enough for some people to be buried.
"By the way, whether it's a doctor's visit or epidemic prevention, it's best to cover your face with a cloth towel to cover your mouth and nose. In case of filth, you can also resist one or two. Also, don't touch those items that carry the disease, and wrap a bag on your hand. A layer of cloth towel, or a wooden clip or something like that, will be much better." Masks are a major invention in the history of medicine and are of great help to medical staff. Talents are rare. If these doctors are also infected with the plague, it will be bad.
This is entirely for the sake of doctors. While nodding, Jiang Da couldn't help but speculate to himself, are all these instructions given by the Buddha? I am afraid that there is also the appropriate thought of this Liang Langjun
"Finally, it's the chores. Wash your hands before meals to prevent the entry of poisons. Take a bath, clean the house, and reduce insects and lice. Bury the drains to prevent mosquitoes and flies from multiplying, or use herbs like wormwood to keep mosquitoes away. Get close. Kill some Ye Xiaoxiao and vegetable snakes less, and let them kill voles. Over time, typhoid fever will probably be under control." Liang Feng finished speaking in one breath and took a deep breath.
In this era, I am afraid that epidemic prevention can only do this. Although I don’t know how much it can be used, but to control the source of the disease as much as possible and reduce the spread of the plague, if it can save a life, it is a life.
Is this the only way to get rid of typhoid fever? Jiang Da was a little unbelievable. However, when you think about it, it makes sense. Even if typhoid fever cannot be completely eliminated, if states and prefectures can implement one or two measures, they may be able to control the number of people infected with typhoid fever. This is a great act of kindness!
Looking at Liang Feng's pale and thin face, Jiang Da sighed: "If Liang Langjun's method is really feasible, it will save countless lives."
Liang Feng smiled and said, "It's better that the book "Treatise on Febrile Diseases" compiled by the master can make Zhang Changsha's medical books handed down. A truly effective remedy."
There is indeed a prescription for plague in traditional Chinese medicine, which Liang Feng is very clear about. But he didn't know when and who found out. Instead of working behind closed doors for generations, it is better to find more people to exchange research results, which may promote the birth of special drugs. It's just that medical skills can be regarded as a secret that is not passed down, and I don't know how many people can really break it.
Jiang Da hesitated for a moment, and finally nodded: "Do your best."
That's enough. Liang Feng leaned back on Pingjie again and took a breath: "Brother Jiang is here."
Looking at Liang Feng's haggard face, Jiang Da couldn't help but say again: "Liang Langjun still needs a lot of rest. Danshi attacks are no trivial matter and should not be ignored."
This matter, Liang Feng is much clearer than him. It’s just that I don’t find something to do for myself, I’m afraid that I’m going to be free from depression. The withdrawal reaction is not a joke. However, the other party was also kind, Liang Feng smiled slightly: "With Imperial Physician Jiang and Brother Jiang looking after him, what's there to be afraid of?"
This smile is simply heartbreaking. Jiang Da couldn't help showing a smile on his face: "Don't worry, I won't leave Liang's mansion recently. Write a soothing prescription first, Liang Langjun will try it at night..."
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That night, Jiang Da's soothing prescription came in handy, and the spices with the medicinal fragrance quickly calmed Liang Feng's nerves, causing him to fall into a deep sleep.
That night, there were neither night terrors nor seizures. When Liang Feng opened his eyes again, it was already bright outside the window. Both Lvzhu and Yiyan had happy expressions on their faces, and they seemed even happier than Liang Feng himself.
Briskly helping his Langjun clean his face and changing clothes, Lu Bamboo said happily: "This benzoin really works! The medicinal food has also been cooked, and the servant will bring it to Langjun!"
Yi Yan moved faster, and was already standing in front of the couch with a bowl in his hand, as if he wanted to help Liang Feng get up to take medicine.
"This is a medicated meal, you should use it slowly. Give me the bowl!" Lu Zhu said angrily.
"I know." Yi Yan didn't move, because he was taller than the little girl, he held the bowl high on the ground, as if he would not give in an inch.
"You bastard..." Lvzhu clenched his fists tightly, looking like he wanted to kick him.
Looking at the two little guys who seemed to be fighting with cats and dogs, Liang Feng blinked and laughed: "Put it down, I'll drink it myself."
This sound immediately quieted the two of them, and the joy in Lvzhu's eyes became heavier, and he quickly moved a small case and placed it in front of Liang Feng. Yi Yan slowly put down the bowl, but his eyes never left Liang Feng's side.
Looking at the bowl of rice porridge with the smell of medicine, Liang Feng took a breath, slowly picked up the spoon, and started drinking the porridge. Although his hands were still trembling slightly, they were not as severe as they were a few days ago. I don't know if enough sleep played a role, or if the withdrawal reaction was relieved. This is obviously a good phenomenon, and the annoyance in Liang Feng's heart has dissipated a little. He drank half the bowl of warm medicinal food one by one before he put down the spoon.
"Lang Jun is really much better, it's time to reward that doctor Jiang!" Lu Zhu was overjoyed. Seeing Lang Jun getting thinner and thinner these days, and often with a gloomy face, she was frightened. I can't wait to do everything I can to make Lang Jun happy. Now that Lang Jun finally showed a smile, how could she not be happy.
Yi Yan looked at Liang Feng's slightly rosy complexion, but his mood was a little complicated. These days, he would feed that person's decoction and rub his body with his own hands every day. At night, he would occasionally encounter night terrors and nightmares.
Of course, Yi Yan knew that this was all caused by illness. This terrible disease could endanger the life of the lord at any time. But only at this moment can he touch the god-like lord well and narrow the distance between them. Shaking hands secretly, he suppressed the anxiety in his heart. It doesn't matter, as long as he trains his family soldiers well and builds an invincible part for the protagonist, he will naturally become an irreplaceable figure by the protagonist's side. More irreplaceable than Green Bamboo, or even Xiao Langjun!
After eating the medicinal meal, Yi Yan went to the barracks again. Liang Feng just got up from the couch: "Lvzhu, help me to the study."
"Lang Jun, you should rest for a while. Shall I go get a few books?" Lvzhu didn't want Liang Feng to be affected, so he quickly persuaded him.
"No. It's better to reply to Wang Zhongzheng as soon as possible." This time Jiang Da also brought a letter from Wang Wen, and the other party said a lot of words of consolation, and also sent valuable medicinal materials. If you don't reply carefully, you can't really justify it.
Hearing this, Lvzhu did not dare to persuade him any more, and carefully supported Liang Feng to the study.
Walking into the study, Liang Feng was the first to read not the book, but a little jade man sitting in front of the book desk.
"Father!" When he saw his father, Liang Rong jumped off the Hu stool excitedly, and then he remembered the matter of observance, he quickly turned his face, and obediently walked to Liang Feng to salute.
Since Chaoyu was promoted to the head of the weaving room, he couldn't be by Liang Rong's side all the time. So she thought of a way to ask Liang Feng to let Xiao Langjun use the study. Liang Feng didn't understand this thought, he clearly wanted to find more opportunities for Liang Rong to get closer to him. And staying in the study, there will be no problems, and she can feel a lot more at ease when she is away. Liang Feng naturally agreed, and Liang Rong began to read and write in the study.
Seeing the little guy's expression, Liang Feng raised the corners of his mouth, took Liang Rong's little hand at will, and walked towards the bookcase: "Is Rong'er in Lintie?"
Liang Rong blushed, and replied obediently, "My child is coming to calligraphy, and I have ten sheets today!"
So early in the morning to write ten big characters, the little guy really worked hard. Liang Feng smiled, walked to the table and looked at the other person's copybook carefully. He saw that the structure of the large characters on it was already rough, but Liang Rong was weak and his hands were shaking a little, so he couldn't be completely horizontal and vertical. There is also the law post, which is not a good product. It's a pity that it's still a little early to practice Liu Ti, and his calligraphy is not enough to practice posts, so don't make people crooked.
After thinking about it for a while, Liang Feng said, "I'll find you a few copies of Master Zhong's copybooks. Let's go to that first."
Zhong Yao's official script and regular script have nothing to say, it is a good choice for entry. It's just that the excellent copybooks are not easy to find. Maybe you can ask Wang Wen to help? Having contacts is the only way to make friends. For such top giants, keeping a distance too far is not a good way.
Touching Liang Rong's head, Liang Feng said, "Go, write a few more pages, and I'll let Green Bamboo play with you."
Children can't stay in the study every day, and that girl Lvzhu is also lively, so it's just right to play with children.
Liang Rong obediently obeyed and climbed onto the Hu stool again. This stool was also ordered by Liang Feng to be transformed. In fact, there are already stools that you can sit on at this time, but they are all soft-sided foldables, which are only for temporary use when people travel. He asked someone to change it, put it on a wooden seat, and let Liang Rong put it on, so that the child would not grow taller after a long time. The reason is also easy to find, just say the book case is too high, let him sit on a high stool.
There were no etiquette obstacles for children, and Liang Rong was very happy to use his father's bookcase, so the Hu stool was naturally placed in the study.
Seeing Liang Rong grabbing the pen again and looking like he was seriously starting to write, Liang Feng smiled and walked to the book desk on the other side, knelt down and sat down.
These days, I have been sick and confused, but I have not stopped remembering the "Diamond Sutra". One is to prepare a letter to Wang Wen, and the other is similar to all scriptures. , even if you meditate a little every day, you can a little restrain the madness in your heart. This is extremely important for Liang Feng's emotional control. It's just that my hands were shaking so badly a few days ago, and the words I wrote were not formed. Today, I finally recovered a little, which is a good time to copy the scriptures.
The table is naturally covered with Zuo Bo paper, and the green bamboo is lightly ground. After the ink thickened, Liang Feng picked up the pen and wrote the scriptures silently. This time, he wrote the fourteenth chapter of the sutra, which was about Subhuti's deep understanding of the meaning of the sutra, and he wept. It also expounds non-attachment to appearances and comprehends the true meaning of the Buddhadharma. For those who are devoted to Buddhahood and are extravagant, the appeal will only be stronger.
This passage is very long, and it was written word by word, and the restlessness in Liang Feng's heart gradually subsided. If you practice calligraphy, you will be able to meditate, not to mention the careful dictation of scriptures. Like flowing clear springs, winding paths, ink words fall on white paper, only rustling sounds are left.
Liang Rong is also writing, but no matter how calm the child is, it is only a child. After a while, his subordinates accidentally slanted and broke a copybook. This word was originally meant to be shown to his father, but it was broken in the last stroke, and the little guy couldn't help but feel annoyed. However, when he looked up, he found that his father was also doing something. The man on the opposite side was sitting in such an upright posture, his wrists were elegantly suspended in the air, and when he mentioned it and pressed it in a rhythm that seemed to flow, just watching it quietly made people admire him immensely.
Liang Rong looked down at the sticker he had written, and suddenly blushed, he secretly peeled off the page, and continued to bury his head in practice.
The father and son wrote quietly for half an hour. Liang Feng finally stopped writing and breathed a sigh of relief. After two silent readings, I finally have a word that I can read. After thinking about it, he attached another page to the letter, thanking Wang Wen for the medicine he sent, praising Jiang Da, and expressing concern about the epidemic prevention issue mentioned by the Buddha in the dream. I want to find some good words for my son.
Although he inherited the memory of the original owner, Liang Feng really couldn't write a colorful text, so he could only describe it as plainly as possible, and he couldn't make the text subtle, so let's keep it simple.
After finally finishing the writing, he looked at his son who was still working hard and said with a smile, "Lvzhu, take Rong'er out to play. I've been writing for too long, be careful that your eyes are broken."
Lvzhuba didn't want Liang Feng to stop writing and rest, so he naturally agreed and dragged Liang Rong, who was still reluctant, out of the door. After a while, the happy laughter of several children came from the courtyard. The sun was shining brightly in the spring, and there was only the fragrance of books and ink in the study. Without the choking pain, Liang Feng no longer kept sitting upright, and leaned on the table behind him. After a while, he fell asleep.
I don't know how long it took, the green bamboo whispered in my ear: "Lang Jun, are you tired?"
"It's okay." Liang Feng opened his eyes and smiled at the concerned green bamboo, "Is someone here?"
If there is no one, Lvzhu probably won't ask that, but let him rest in peace. Seeing through this little thought, a red cloud appeared on Lvzhu's face, and he said softly, "It's Liu Jiangtou and Jiang Jiangtou."
"Call them in." Liang Feng rubbed his face, turned his head to look, and found that there was no one in Liang Rong's seat, probably because he was afraid of disturbing his rest and was taken away by the maids.
Green Bamboo didn't dare to delay, and walked out quickly. After a while, Liu Jiangtou and Jiang Jiangtou walked into the study together and greeted Liang Feng.
"Has the bellows been developed?" Liang Feng's eyes were not on the two of them, but at a glance at the large wooden box that Liu Jiang was holding on his head.
Wind heating has always been a good way to increase the temperature of the furnace. Liang Feng naturally thought of the double-piston bellows first. This thing is found in almost every household in the countryside. The structure, but the general appearance is still known, so I told Liu Jiangtou about it and asked him to find a way to develop it.
Recently, Liu Jiangtou has also been very energetic. Not only has his son taken over the important errand in Zhifang, but his own wooden workshop also has the appearance of a dead fish turning over. The spear was well made, and it was praised, and the master gave the bellows job again. Liu Jiangtou didn't dare to be neglected, and went to the iron workshop to find Ding Da to borrow Picha, which almost didn't make Ding Da, a stubborn old man, turn his back on him. After accepting the other person's favor and saying that he must be replaced with a new one, he finally figured out the internal principle of this thing. Coupled with Liang Feng's reminder, the double-piston bellows didn't have any complicated structure, just a layer of window paper, which directly let Liu Jiangtou make the finished product.
Liu Jiang's face was flushed, and he replied excitedly, "Thanks to the guidance of the master, the young man made this bellows. As long as he pulls the rod, he can blow wind. It is much easier to use than Picha, and the wind is stronger!"
Jiang Jiang's excitement was no less than his, and he said, "This bellows is really useful! I tried it on a kiln once, and the fire was incandescent. It was indeed a legendary porcelain fire! But the original pottery kiln was really too big. , it is difficult to control the temperature of the kiln, I am afraid that another small kiln will have to be built. The money in the pottery account is enough!"
The higher the flame temperature, the more cooler the flame is. Jiang Jiang's head is an ancestral kiln burning skill. It seems that there is indeed some way to observe the temperature of the flame. As for other requests, Liang Feng will not refuse: "The pottery workshop can stop all the work at hand and concentrate on trial-making new porcelain. Also, I have heard that there is a kind of black stone in the mountain, which is flammable in case of fire. I wonder if you can Buy some back and try this one in the kiln."
Naturally this is coal. Bingzhou is located in Shanxi, but it is a province with large coal mines, and I am afraid there are many open-pit mines. If coal is used to burn porcelain, it may be less labor-intensive than wood, and the furnace temperature can also be increased.
Sure enough, Jiang Jiangtou thought about it for a while, and then asked, "Is the master talking about black stone? People in the mountains also call it charcoal. Big families rarely use it.”
now it's right. Liang Feng nodded and said, "I've also heard someone say it. Since few people use it, the price is naturally low. Go get some and give it a try."
After several beatings, Jiang Jiang's head was obedient to Liang Feng, and he nodded immediately.
Liang Feng said to Liu Jiangtou again: "You have done a good job with the bellows this time. Go to the account and withdraw 2,000 yuan as a research and development reward. There are still signs of severe drought this year, and I am afraid to do something. A tool for drawing water, can you make a waterwheel?"
Liu Jiang's head was almost smashed by 2,000 yuan. When did he get rewarded for hitting such a small thing? Still a full two thousand dollars! He didn't hear the second half of the sentence clearly, but Jiang Jiang's head was clever and pushed him a bit before he could react, and hurriedly said: "Small, small can make a car overturn! It's quite time-consuming and laborious..."
His family was originally from Fufeng, and Ma Dajiang was a Fufeng man. After the keel was overturned, it was widely spread in his hometown. Therefore, Liu Jiang's ancestors handed down the craftsmanship of overturning cars, and it is not difficult to do this. It's just that it takes time and a lot of money to build a rollover car, so the Liang Mansion only built a few rollover cars at the beginning, so they don't waste money anymore.
"Even if you go to build it, money is easy to talk about." Liang Feng made a decision directly.
In the previous paragraph, Wu Jiang's head was dealt with, and not only was he beaten up, he also copied his small home. Plain and simple more than a hundred thousand money. The cash is also moldy in the warehouse, so it is better to put it into production. The infrastructure should be upgraded, and the bonuses should be issued. Only in this way can the enthusiasm of producers be improved and greater economic benefits can be obtained. This set was taught to him back then, but unfortunately now, there is no such person around him.
Mood suddenly a little low. Liang Feng told the two to be more careful, and after keeping the bellows and porcelain firing a secret, he waved them back. He also asked Lvzhu to invite Jiang Da to talk about epidemic prevention in detail.
The author has something to say: Picha is a primitive blower, probably in the Spring and Autumn Period, and has developed by leaps and bounds in the Han Dynasty. Piston bellows appeared in the Tang Dynasty, which can effectively improve the blowing efficiency.
Regarding the use of coal, it was recorded in the Western Han Dynasty, and it should have been common to mine coal and make iron in the Jin Dynasty.
Ma Dajiang is a famous inventor Ma Jun during the Three Kingdoms period. He transformed the weaving machine, made the keel rollover, and also improved the continuous crossbow and the stone trolley invented by Zhuge Liang. It is precisely because of the sharp decline in population and frequent wars during the Wei and Jin Dynasties of the Three Kingdoms that many military inventions were used in agricultural tools, so in the early years of the Western Jin Dynasty, agriculture developed rapidly and the society was stable and prosperous. Luxurious.