After coming down from the podium, Guan Yi took King Ganling and others to visit the two full-time teachers of Longshouyuan Academy.

One is the famous Huangfu Mi. This master is the "originator of acupuncture" in the field of traditional Chinese medicine. His medical skills are well-deserved to be the first in the world in this era when Hua Tuo and Zhang Zhongjing have passed away.

As the great-grandson of Huangfu Song, Huangfu Mi is of course a child of a family. Fortunately, he is an alternative among the children of the family: he is not interested in being an official, but likes medicine and literature. Therefore, after Sima Yan ascended the throne, he was repeatedly recruited as an official, but he did not accept it. After Guan Yi only briefly described the concept of cowpox prevention of smallpox in a letter, Huangfu Mi willingly came to Chang'an and signed a ten-year deed of sale for Longshouyuan Academy.

And the other, if you're not a math major, it's not strange to know him. If you are a student majoring in mathematics, then his name cannot be bypassed: Liu Hui, the author of "Nine Chapters of Arithmetic Notes" and "Island Arithmetic", and the founder of the ancient Chinese mathematical system.

General division, reduction, four operations, opening squares, opening to generate irrational numbers, systems of linear equations, methods for finding the area of various irregular geometric figures, formulas for the area of spheres, gravity difference, circumcision method to find pi, etc., are all pioneered by him or summarized by him as theories......

Mathematics is the foundation of all natural sciences. The greatest mathematician of this era, Guan Yi, of course, had to bring him under his command.

It is different from Huangfu Mi, who is a son of a family and specializes in medicine and literature when he has no food and clothing. Liu Hui is a commoner and has a hard life. Therefore, the invitation to Liu Hui is much easier than Huangfu Mi: after Si Wencao brought Guan Yi's letter, promising to hire him with a high salary and unlimited funds to support him to do scientific experiments, Liu Hui was happy.

"Your Majesty, everyone, this one is Mr. Huangfu Jing'an. In Yi's view, Mr. Jing'an was the world's first doctor. ”

China, as an official-based society. It has always been the case that officials belong to the superior people, and below the officials, teaching is the second most respected profession. As for the doctors......

Zhu Danxi, a medical master of the Yuan Dynasty in later generations, is a super master who has made pioneering contributions to the theory of traditional Chinese medicine. What did the Ming people say about their biography? In "The Biography of Danxi Weng", although the author Dai Liang uses a lot of pen and ink to introduce Danxi Weng's medical skills. But the last paragraph still exposes the disdain that Chinese scholars have for the profession of doctors: Zhu Danxi is a man who studied Confucian classics when he was young, so strictly speaking, he is the same kind of person as us. Don't look down on him because he's a doctor.

In a word: you are not an official, you are ......

Therefore, when Guan Yi introduced Huangfu Mi as a doctor, Liu Yong was not particularly enthusiastic.

"Jing'an is not only a doctor with divine skills, but also a very noble family. He is the great-grandson of Huangfu Yizhen. ”

"Ouch, it turned out to be after my Han God of War Emperor Fu Yizhen. No wonder the doctor is superb! ”

"Don't dare, what kind of medical skills are like this, I can't stand it. It is the idea of preventing smallpox proposed by Da Sima to the next is really amazing! ”

"What? Zifeng? Do you have a way to prevent smallpox? ”

Of course, there is, although on a historical level, Dr. Chenner has gone through a lot of hardships in researching and promoting the cowpox method. But the technology content in this is not high. Once you understand the theory, it's actually very simple to replicate it.

In the Three Kingdoms period at the end of the Han Dynasty, the decline in population due to war was actually limited. The real, biggest murderer is actually the disease. Specifically, plague (infectious disease).

Open the history books of this period, and the records of the great epidemic and the death of the city are vivid.

Because of the backwardness of medical technology and epidemic prevention concepts. The damage caused by ancient plagues is not comparable to that of modern epidemics. SARS in 2003, I believe that modern people have deep memories, at that time the atmosphere of panic in the country was extremely strong. Beijing, Guangdong, Hong Kong and other hard-hit areas are like purgatory. In the end, the World Health Organization's statistics show that there are 8,422 cases and 919 deaths worldwide. And in 1232 AD, on the eve of the Jin Dynasty's imminent destruction, there was a plague in Kaifeng City, what did the history books say at that time: more than 900,000 people died from all gates, and those who were poor and could not be buried were not counted. In other words, just Kaifeng is a city, and the death toll is far more than one million! Almost the entire city is dead! Because of this, the Jin dynasty was no longer able to resist the Mongol attack. Eventual perdition.

Therefore, in ancient societies, all kinds of virulent infectious diseases were the biggest enemies of population growth!

As a traverser, Guan Yi certainly knows how to solve the problem of cowpox cultivation. Not only that, but Guan Yi has read some basic biological knowledge. Know that the best way to tackle infectious diseases is not in treatment, but in prevention.

How can it be prevented? Different diseases have different methods of prevention. For all kinds of infectious diseases caused by viruses, it is the most economical and effective way to vaccinate people who are not sick in advance.

is still the same sentence: In the past, Shu Han was the weakest, and it was self-defeating to widely promote various epidemic prevention methods. Many tech trees only dare to go to this point at this time. After taking Yongliang, Guan Yi unlocked agricultural technology points such as potatoes, new rice, and Quyuan plows. The first skill in medicine is smallpox prevention.

"Hehe, my lord, I just have a little bit of an eyebrow at the moment. Some human trials are still needed to verify whether this inference is correct. ”

"Eh, what's so difficult about this, this king is in charge, the house slaves in the palace of Ganling, you want as many as you want. As long as smallpox can be truly prevented, all the house slaves in this king's palace will be dead, and this king will not complain......"

Why does this sound so sad? Well, in this era, the opinion of the superior on ordinary people is about the same as looking at ants......

"Thank you, Your Excellency, for your kindness. However, the house slaves in the palace are also Han Chinese, so the ministers are not ready to use these people. Some time ago, General Pingbei exterminated the remnants of the beggar department in the front set and sent about 500 prisoners of war. Mr. Chen and Mr. Jing'an are ready to use these people for experiments. ”

"Hehehe, good! Oh, what a surprise! If smallpox can be prevented, then the annual population of our Han can increase by at least half a percent! Mr. Jing'an, this king pleases you for everything, I didn't say it, I want someone to give it to people, and I want money to give money! ”

"Thank you, King Ganling! This matter also needs to be continued by Da Sima. ”

"Hehehe, don't dare to be a guide, study together, and prove each other!"

After introducing Huangfu Mi and the topics he was going to carry out in the near future, Guan Yi turned around slightly and pointed at Liu Hui: "King, everyone, this is a native of Donglai, Qingzhou, Liu Hui and Liu Ziyi." Mr. Ziyi is the world's first mathematician, and his attainments in mathematics, in the opinion of the minister, are not inferior to Zhang Pingzi (Zhang Heng). ”

"Oh?"

There really wasn't anything to say except an "oh". For an idle prince like Liu Yong, what the hell is mathematics? Zhang Heng is of course famous, but in the minds of Liu Yong and others, the geodynamic instrument is just an ornament. Zhang Heng deserves respect for the good writing of other people's Han Fu. But what Guan Yi introduced here is that Liu Hui's mathematical level is not inferior to Zhang Heng. This, how high is Zhang Heng's math level? I don't know.

"Hui is just a commoner, how dare he be on a par with Zhang Gong. Da Sima was tormented. ”

"Hehehe, Mr. Ziyi, don't be humble." Doesn't it mean that intellectuals are arrogant? Why is this Liu Hui a little inferior. "This, Mr. Ziyi, what do you know about the trigonometric functions that Ri Yi and you mentioned some time ago?"

"Da Sima!" As soon as he mentioned academic issues, Liu Hui's demeanor immediately became vivid: "Da Sima is really a celestial man, and he actually put forward such an unprecedented theory. With this thing, many structures that could only be done by experience in the past will become traceable! I have the confidence to improve it within half a year, and then I can use it in practice and guide production according to what Da Sima said! ”

Mathematics, the foundation of the natural sciences. Trigonometry is one of the more basic things in the huge discipline of mathematics. But even so, with it, surveying and mapping, architecture, cartography and even the future navigation of the Great Navigation have the most basic theoretical and scientific basis.

"My Majesty, colleagues. Mathematics contains a lot of content, and it is also closely related to our actual life and even national politics. In the simplest way, without mathematics, the house cannot be built, and the royal bearing cannot be revealed. Without mathematics, land cannot be measured, and taxes cannot be discussed. Without mathematics, the proportions of the map are distorted, and it is impossible to guide the march to battle...... Based on this, physics, chemistry, astronomy, geography, etc. were developed. It is the guarantee of the prosperity of our Han in the next thousand years. And the founders of all this are on the shoulders of Mr. Ziyi. ”

After listening to Guan Yi's explanation, everyone who didn't pay much attention to Liu Hui changed their attitude in an instant, and everyone gave up their hands to Liu Hui again and again, making Liu Hui, who had always been humble and used to it, very uncomfortable.

"Mathematics and medicine, the two most important subjects in the natural sciences, I can be regarded as the best leader of this era. It's just for the real harvest, I don't know when. Anyway, it's better to plant the seed than to do nothing. ”

Cleaning up his mood, Guan Yi said to everyone: "Everyone, this is almost the case here. Let's hurry up and eat, and then let's go to Gojogahara! ”