Not all emperors like to pretend to beep, but there is no doubt that Li Gan belongs to this kind, at least Liu Yu thinks so.

He has long been eyeing foreign academicians of the Russian Academy of Sciences.

For the next twenty years, the West French Party, the Old Conservative Party, the German Party, the Russian Party, foreign women, foreign women's mistresses, native aristocrats, ...... It would turn the Russian political situation into a mess, especially when the Privy Council invited the German widow back to be the Tsar as soon as the little tsar died.

Scientists also need to eat and live a good life, and research also needs a stable environment.

Since this group of people can go to the wild Russia, if the Dashun side offers better conditions, they will definitely be willing to come.

It's not that Liu Yu is not confident, but in front of real cattle, his strength does not allow him to be confident.

Euler is the kind of person...... The light shines on the blind.

A strongman who has instilled the mathematical tradition in the Russian Academy of Sciences and made Russian mathematics strong for hundreds of years can be deceived or hired in the capital, and it will undoubtedly be extremely beneficial to realize the idea of Leibniz's Beijing Academy of Sciences.

To be more realistic, Dashun wants to open up the South Seas and prosper the navy, and in the last afterglow of the Age of Discovery, he needs Euler even more.

Because...... Navigation.

Newton and other "older generations" came up with a sextant, and latitude navigation was no longer a problem.

There is the Southern Cross in the south, the North Star in the north, and where the north-south direction is, you can know by looking at the stars.

If you know the north and the south, and then the east and west, you can know your specific position on the earth.

This is indispensable for navigation without a reference object, and it is also the only way for Dashun's navigation to break away from the needle road song and island jumping method.

Euler is the key figure in solving this problem.

If you want to solve the problem of longitude, there are three schools of thought as a whole.

Wichow.

Technocracy.

School of Mathematics.

The UK is now offering a £20,000 bounty for those who can solve longitude calculations. It is equivalent to about eight thousand taels of gold.

The solution given by the Witchcraft School is as follows:

The Wicca sect believes in telepathy between twin brothers, both humans and dogs. So, get a litter of dogs and let these puppies grow up together. Then when you go to sea, let the crew bring a dog. Every day at midnight in London, he pricked the dog brothers who were left on land with needles.

They believe that the dog brothers on the ship will be telepathic and will then scream.

The crew heard the dog barking and judged the accuracy of their own position by observing the sun, judging the local time, and judging by the time difference.

Obviously, the Wiccans couldn't get twenty thousand pounds. Because it's pure.

The technocrats think that this is a simple matter, as long as I build a clock that can be accurate in the face of turbulence, heat and cold, sea erosion, salinity, ship steering, etc., according to the time difference between local time and London time, wouldn't it solve the problem of longitude measurement?

However...... It's not simple. At least at this time, no one has done it yet.

Dashun's mechanical manufacturing process is backward, and this thing is also counted as "strange and ingenious" within the scope.

Besides, Liu Yu didn't think that he could convince the emperor to take out 8,000 taels of gold from the treasury, a reward of 20,000 pounds, and royal honors to recruit such a slut craftsman.

In this way, it will undoubtedly cause an uproar, and it will be regarded as Dashun learning from Mengyuan, and let the craftsman climb to such a high height.

Liu Yu didn't dare to put this fire at this time, and it was easy to burn himself to death at this time.

Moreover, it is useless to put the estimate, the level of Dashun's clock manufacturing is too far behind.

The witchcraft school is not good, and the technical school Dashun is not playful, so only the mathematical school is left.

There is always a "number" in the six arts of Confucianism, and this opposition can be much smaller.

It is said that Lord Niu came into contact with this problem at the beginning and thought that this problem was very simple, as long as he drew an accurate star map and drew the orbit of the moon, wouldn't it be solved? And then...... So he went to work on theology and stock trading.

The school of mathematics now has a solution.

And this solution requires three things.

Accurate star map of the Northern Hemisphere.

Accurate star map of the Southern Hemisphere.

Calculation of the moon's orbit and calculus.

There is a way, if you are not crazy, you will not be holy.

The pursuit of science has made many scientists a little crazy.

Framsteed, who founded the Greenwich Observatory, looked up at the starry sky for twenty years, stood on the shoulders of giants, and drew a highly accurate map of the northern hemisphere.

But he is a "true Virgo perfectionist obsessive-compulsive disorder", believing that the star chart he has drawn is not extremely perfect enough, so he has always refused to publish it, and must be flawless.

It is said that in mechanics and mathematics, the sky does not give birth to Newton, and eternity is like a long night. But Lord Niu's character is really a bit ......

In order to get his hands on the chart, Newton asked Halley's Comet Halley to steal Flamstede's Northern Hemisphere chart.

As a result, Framsteed, out of his perfectionist obsessive-compulsive personality, burned a lot of the northern star map with a fire.

It wasn't until he died a few years ago that his descendants and disciples published the chart. Lord Niu plagiarized some of the results, and decisively deleted Flamsteide from the list of citations when the second edition of the Principia Mathematica of Natural Philosophy was published.

Now, Newton is dead, and the Northern Hemisphere Catalog of the Northern Hemisphere, which has just been sorted out by his descendants, has just come out.

One of the three problems of the school of mathematics was solved.

The star map of the southern hemisphere, as the second problem of the mathematical school, there is a French "madman" Lacarlet, in order to draw an accurate star map of the southern hemisphere, a person ran to this fashionable and desolate Cape of Good Hope in Cape Town.

This person lived there alone for more than ten years, and finally completed the Southern Hemisphere Catalog.

The second problem of the school of mathematics was also solved.

All that remains is the third problem: the exact orbit of the Moon.

If these two star charts had come out 30 years earlier, perhaps Newton would have been able to calculate the lunar problem.

But these two pictures have just come out, Newton just died last spring, and they all say that the butcher eats hairless meat without Zhang, but in science, sometimes it is really difficult to eat hairless meat without Zhang.

In the calculation of the lunar orbit, it is inevitable to consider the "three-body problem", because in addition to the moon and the earth, a sun is also involved.

The three-body problem is difficult.

Euler was the first person to try to solve the three-body problem, and he was plagued by the three-body problem for forty years, and finally felt that the three-body problem had no solution.

But he found several special points in the paper, which were carried forward by the next generation of Lagrange, and also provided the basis for the calculation of the lunar orbit.

It can be said that without Euler's study of the three-body problem, there would be no way to accurately calculate the lunar orbit.

There is no way to accurately calculate the orbit of the moon, and there is no way to make an astronomical almanac and a map of the phases of the moon.

You can't make an astronomical almanac and a moon phase chart, and even if you have a chart of the stars in the northern hemisphere and a chart of the stars in the southern hemisphere, there is no way to calculate the longitude of this place.

I can't calculate the exact longitude, dominating the seven seas is a pipe dream, and dominating Nanyang Australia is a black dream, it's all a dream.

Liu Yu knew that his two brushes were very beep-free, and he was not qualified to study the three-body problem.

Only rely on Ora, a big bull who makes future generations of college students hate before exams.

Once the exact orbit of the moon is obtained, all that remains is to hire a group of "mental laborers" to calculate the moon phase diagram and orbit and write tables like "trigonometric tables" and "logarithmic tables", so that sailors and navigators do not need calculus levels and memorize by rote.

Look at the table, look at the moon and stars, and look up the table to determine the longitude at this time.

Once Dashun was the first to make the moon phase chart and astronomical almanac, it was not only the benefit of navigation, but more importantly, the right to speak in the world in the future: Greenwich Observatory, what is zero degree longitude? Because Britain made a marine clock, it was the first to make an astronomical almanac moon phase chart.

If it is done here in Dashun, it is natural that Quanzhou or Guangzhou or Ningbo is the prime meridian.

If you want to sail, you have to have a copy of the moon phase chart of the astronomical almanac of the Beijing Publishing House, which naturally affects the naming of many rules. For at least fifty years, marine clocks were a luxury item that ordinary people could not afford and could not be made by ordinary craftsmen.

If Euler can be lured to the capital, it will be a wealth that is difficult to calculate, both for practical benefit and for a long mathematical tradition.

It is not a problem that can be solved with money, but it is not a problem to spend a thousand taels of silver and ask someone to bring two copies of the star chart from Europe.

Spend a few thousand taels of silver to hire a group of Western brain workers to calculate the moon phase chart and longitude comparison table, and there is no problem.

But there are many more, which money can't solve.

In the war against Russia, Liu Yu wanted to squeeze out all the benefits that could be squeezed, not those few pieces of land.

He himself didn't care much about those few pieces of land, and if he got it at this time, if the reform was not successful, he would have to lose it in the future; At this time, it is lost, as long as the change is successful, it is still in hand. The true belonging of the Outer Northeast and Siberia lies in whether the first railway station built there was written in Chinese or in Russian.

Therefore, Liu Yucai attaches great importance to the Rakshasa mission this time, squeezing the last bit of juice from Russia, hoping that the mission can send some signals.

With the help of the once-in-a-lifetime chaos of the Russian political situation for 20 years, a figure like Euler has one more choice: maybe he can go to Dashun.

The death rate of navigation is too high, and the average scientist will not choose to take a boat, after all, there are wives and children.

If you go to Siberia, you will be much safer.

As soon as you can send an envoy to the Rakshasa side and the Rakshasa Tsar ascends the throne, you will go to celebrate, as long as the opportunity allows, the political situation in Russia is in chaos, you can try to fool Euler and others.

Of course, there is another premise:

Euler has to think that Dashun's side is not a desert of mathematics, but someone who can discuss mathematical problems with him.

It just so happens that the emperor is another character who likes to pretend to be a beep in Liu Yu's opinion, and this is a perfect opportunity.

He said that if he is 100% sure, he really has 10% certainty.

There are still no problems in asking a few questions and embarrassing the group of Academy students who came with the envoy group.

If a few questions can be produced and transmitted back to Petersburg, Euler's interest will be aroused, and the foundation will be laid for fooling Euler in the future.

Thinking that since the emperor blurted out how sure Liu Yu was, Liu Yu knew that the emperor was moved.

"Your Majesty, I heard that the Rakshasa Mission intends to perform martial arts, so you can ignore this. Our dynasty has won in the north, and the martial arts are already there, even if they have the intention to show their strength, what can I do if I don't wait to see it? Anyway, it is our dynasty that expands the land, and it is they who retreat. ”

"Wenzhi martial arts, Wenzhi martial arts. There are both martial arts, and there should be civil governance. Your Majesty can 'test the name of learning', and deter the 'erudition' in the Rakshasa Mission, so that the name of our dynasty will spread far away. It also made them dare not think again. ”

"If it is a martial exercise, the Rakshasa will see that our dynasty still uses arquebuses, thick arrays, and cold weapons to protect it, and then he knows that our dynasty is backward in armament. On the contrary, they may be contemptuous, and in the follow-up negotiations, they may also dare to ask for a price. ”

"And if the inscription is deterred, people of insight in its country will know the depth of our dynasty."

"Why? If mathematics is strong, artillery is strong; If science is prosperous, armament is prosperous; If the geometry is strong, it is easy to build a city and attack a fort. ”

"My dynasty is ten times richer and five times more taxed than the rakshasas. Even though the Beijing camp is still using arquebuses, the Rakshasa will be able to understand that as long as you have money and heart, you will not be able to reach the Rakshasa in a few years. In the future negotiations, there will be more concessions. ”

"As for the scriptures, the Rakshasas don't understand it, and they don't know the prosperity of our dynasty. So we can only make a fuss about this matter. ”

Since Jinshuiqiao asked right that day, Liu Yu has been saying that Dashun's military system is backward.

This Li Gan originally didn't know where the backwardness was, and he didn't see the regular army tactics of the Rakshasa in the first battle in Northern Xinjiang, but the siege of the fort confirmed what Liu Yu said was true.

Later, Liu Yu also made a diagram to explain the significance of the bayonet, the benefits of the rapid maneuver of the unarmored line private, and ...... Save money.

At this time, Liu Yu talked about this again, and Li Gan felt that it was the same in his heart.

If you play martial arts, those who don't know how to do it will be lively, and those who know how to do it can see that there is something wrong with Dashun's military system.

In the previous battles in the northwest, there were problems with the coordination of the huge thick phalanx and the cover of hot and cold weapons, which caused the Dzungars to seize the opportunity.

At that time, it was originally a "big reading" to show the military might, but it was seen by the Rakshasa people who knew how to do it, and then gave an evaluation of "80 years behind", it would be self-defeating.

A few days ago, Yi Guogong also said this problem, and he resolutely could not agree with the Rakshasa to demonstrate the skills and artillery skills of the Western military formation, and it was also because of this, I was afraid that no one would see the beauty after the demonstration, and I was even more afraid of what kind of reading would make the Rakshasa people see the bottoms clearly.

Although Li Gan said that he likes to pretend to be a beep, this preference has always stood in the perspective of an emperor to pretend: attacking the fort, it is Liu Yu who gives advice, in the emperor's opinion, it is not the prince's minister, Liu Yu is a courtier, borrow it and let the emperor pretend to beep, which is acceptable.

caught the godson of the Rakshasa King, and wanted to learn from Li Er to get a foreign big man to be a good man by his side, this was caught by the courtiers, which is equivalent to catching it himself, and this beep can also be pretended a little.

But he is not a person who hides his ears and steals the bell, and he doesn't do it where he or his courtiers don't have the strength to pretend to beep.

At least this time, when the Rakshasa envoys visited, he strictly ordered all localities: It is forbidden to hang colorful flags on the carts of the Rakshasa envoys and write the word "tribute". Whoever does this is to be judged as "blinded and listening."

Because people really didn't come to pay tribute, Western missionaries said that they were "tributes" for various purposes, and they could pretend not to know, after all, they didn't take the initiative to let them say that those gifts were "tribute".

Just like one day in the future, if you really hit the Rakshasa tribute, it may not be the emperor, but at that time, it is natural to enjoy the glory of the tribute, and you can feel at ease.

Now Liu Yu proposes to pretend to be a beep on the "Wenzhi", this sycophant is very placed, Li Gan is still very itchy about this, the courtiers are their own, the idea of imperial power, it is like this.

The emperor wants to be cool, Liu Yu wants to make real profits, and they just use each other to take what they need.

Now Liu Yu has used the content other than sycophants to talk about future exchanges and negotiations, which makes Li Gan have no choice but to refuse.

Liu Yu is relieved to do things.

said that it was 100% sure, that is, 10% sure, I saw it a few times before, he didn't need to ask, Liu Yu would naturally handle things well.

Now Liu Yu was waiting for him to nod, Li Gan groaned slightly, and then said, "Qingyan is very true." The Rakshasa mission has now arrived in Zhangjiakou and will arrive in Beijing soon. ”

reminded Liu Yu that the time was coming soon, and Liu Yu didn't say a word, that is, he told the emperor by default: There is no problem with time, it is enough.

The two tacitly completed the conversation.