Please ask me to be the emperor

It was said that Wang Zheng's lie was exposed by Zhang Shun, and he was immediately ashamed and embarrassed.

However, after he stabilized his mind, he still said: "The Far West is only thousands of miles away from me, and the numerical tables and conversions are incomplete" and "The weights and measures are not the same as those of China, and the conversions are wrong" and so on.

Zhang Shun is very familiar with this. When he didn't finish his homework and was checked by the teacher, he made the same excuse.

However, he did not intend to expose Wang Zheng.

For one thing, in Zhang Shun's previous life, "Western France" was able to develop and expand, crushing other civilizations in one fell swoop, which naturally has its advantages.

Secondly, science will inevitably develop because of exchanges and fall behind because of isolation.

Zhang Shun is not so arrogant that he can lead the world into a new era with his own strength.

Thirdly, Zhang Shun also planned to take the opportunity to find out where China is relatively backward and which areas are more advanced in this era, so as to use it as a reference for formulating the next policy.

Thinking of this, he couldn't help but laugh and said: "In short, it is not a good idea to say that the father-in-law is right and the mother-in-law is right."

"Well, let me give you some time first. You can prepare the content of your relevant theories and let me hear which one makes sense!"

"Ah? Okay, this is good!" Wang Zheng was stunned when he heard this and quickly replied.

As an expert who wrote "Pictures of Strange Weapons of the Far West", he certainly knew the importance of actual verification.

However, in the previous competition between Xifa and Qin Tianjian and the Eastern Bureau, the results were quite ugly. Now that Xu Guangqi is dead, the Xifa Party has become increasingly desolate, which forced him to give up his intention to compete with the other two bureaus through verification.

As for explaining and boasting, this is what missionaries are good at, and Wang Zheng is still extremely confident in this.

However, something must have gone wrong, and he quickly added: "Due to the language barrier between Far West and me, there are many words in it that do not convey the meaning."

"Please allow me a few days, Your Majesty, and then I will explain it to Your Majesty in detail."

"Easy to say, easy to say, let's go like this. I'll ask Qin Tianjian and Dong Bureau for their opinions first. If they don't have any opinions, let's start with them first!" Zhang Shun chuckled, pretending not to know what Wang Zheng was thinking, and directly He agreed immediately.

You want to avoid "checking", how is this possible?

Let me first feel the truth and reality before making any calculations.

Zhang Shun's plan was settled, and as soon as Wang Zheng left, he immediately ordered to make preparations with Qintian Supervisor Zhengge Chengke and come to "lecture".

As a result, Ge Chengke got the order and rushed over with a copy of "Zhou Bi Suan Jing".

This Ge Chengke looks to be in his thirties and is wearing a light crimson official robe.

Due to the "change of clothes" in the new dynasty, he added a few golden stars on the chest of his official robe.

""Zhou Bi Suan Jing"?" Zhang Shun looked at the title of the book he submitted and almost thought he had read it wrong.

"Yes, the main task of astronomy is calculation. If you don't calculate, you don't know the distance. If you don't calculate, you don't know the size. If you don't calculate, you don't know the length!" Ge Chengke explained seriously.

"Okay, then you continue!" Zhang Shun frowned when he heard this and couldn't help but decree.

According to his learning experience in his previous life, isn't it usually right to talk about the theory first, then the axioms and theorems, and finally the calculation methods?

What kind of teaching method are you doing?

"So, let's first explain the Pythagorean algorithm." Ge Chengke couldn't help but flip through the book.

"Yes, I've learned this before!" Zhang Shun gave the order expressionlessly.

"Okay, then I'll talk about the double difference technique again." Ge Chengke didn't dare to say anything, turned the book over and said.

"Yes, I have learned this too!" Zhang Shun continued to issue the order without joy or sorrow.

"Okay, let's do some math." Ge Chengke had no choice but to close the book.

"How high is the sky?" Zhang Shun suspected that he was arrogant about himself, but he was not angry.

The so-called weight difference technique is to set up a table pole and then use the triangular proportion relationship to calculate the distance, height and size.

For example, the artillery firing chart originally formulated by Zhang Shun was calculated using this method, so he confidently said, "I have learned this."

Thinking of this, he couldn't help but smile and said: "Please continue!"

Say I don’t know the heights of the sky? I think you just don’t know the heights of the world!

"It is known that the shadow of the sun is one inch, and the distance between the earth and the earth is thousands of miles. Now we know that the watch pole is eight feet, what is the distance between the sun and the earth?" The supervisor, Ge Chengke, was not polite and asked directly.

"Uh, it should be 80,000 miles, right?" This was a very simple triangle of equal proportions, and Zhang Shun immediately figured out the answer.

"Now the height of the standing table is eight feet to look at the pole. The sentence is one foot and three inches. From this point of view, how far down is it from the northern part of the Zhou Dynasty to the pole?" Ge Chengke smiled when he heard this and couldn't help but ask again.

This sentence means to stand up an eight-foot-long watch pole and look at the North Star in the distance. Its projection is one foot and three inches long. Find the distance from the North Pole to the North Star.

"The shadow of the sun is an inch, and the ground is thousands of miles away. So the distance is one hundred and three thousand miles?" Zhang Shun said with some uncertainty.

"Of course, as expected, His Majesty's talents are beyond comparison with others!" Ge Chengke nodded with satisfaction and couldn't help but compliment.

No, what about you cheating me?

Zhang Shun was originally quite conceited when he heard this, but after thinking about it, he immediately discovered the fallacy in it.

Polaris is more than a few hundred light-years away from the earth. You calculated it to be a hundred and thirty thousand miles away. Are you fooling me?

Thinking of this, he couldn't help but laugh and said: "Although this method is good, there are many omissions. I'm afraid that it will be wrong!"

"Your Majesty, what do you mean by this?" Ge Chengke couldn't help but smile and asked.

"This assumption must be as accurate as the floor and the light as straight as a line!" Zhang Shun laughed.

Brother, your assumptions are wrong!

"It turns out that Your Majesty is already proficient in astronomy, but it seems that the humble minister is showing off!" Ge Chengke smiled sheepishly, and then replied.

"The sky is round and the place is flat. This is what was said in the past when we covered the sky, so there are many fallacies."

"As for Zhang Heng, he said, 'The sky is like a chicken's chicken. The celestial body is round like a pellet, and the earth is like the yellow inside a chicken's chicken, living alone in the sky.' This is what Huntian said."

"As for a group of monks in the Tang Dynasty who 'compared the northern and southern sun shadows and calculated them using the Pythagorean method', they traveled all over the north and south, and finally measured 'the maximum rate is three hundred and fifty-one miles and eighty paces, and the extreme difference is one degree'."

“It is also calculated that ‘the North and South poles are eighty thousand miles apart and their diameter is fifty thousand miles’, which proves how thin and thick the earth is!”

"Wait, wait, wait while I do the math!" Zhang Shun always felt that something was wrong when he heard this.

There was a poem in a previous life called "Sitting on the ground and traveling eighty thousand miles in a day." This means that the earth's equatorial circumference should be about eighty thousand miles.

After coming to this life for so many years, Zhang Shun probably realized that this era is almost the same as that of later generations.

If this is the case, then the distance between the North and South Pole should be about 40,000 miles. How could it become more than 80,000 miles?

After he took out a pen and paper, he made some calculations and found that if it was "one degree of extreme error" and "three hundred and fifty-one miles and eighty paces", then the distance from north to south should be more than 120,000 miles.

Putting aside the issue of whether the calculation is accurate or not, the monk and his line are contradictory on this point alone.

At this point, Zhang Shun couldn't help but look at Ge Chengke again.

"Your Majesty is indeed extremely gifted. His Majesty is still aware of the things that are easily overlooked!" Ge Chengke first complimented Zhang Shun and then explained with a smile.

"The former uses a new ruler, while the latter uses an old ruler, so there is a contradiction."

"The current ruler is six minutes longer than the old ruler, and one mile is measured at three hundred paces; the old ruler is shorter than today's ruler by six minutes and five, and one mile is measured at two hundred steps, so the lengths are different!"

"Oh?" After hearing this, Zhang Shun first removed the slight differences between the old and new feet, and roughly calculated that two-thirds of the more than 120,000 miles was exactly the number of more than 80,000 miles. He was immediately shocked.

Good guys, you guys are engaged in "technical blockade" here!

Zhang Shun finally believed that this guy was quite capable, and he quickly continued the discussion with him.

Originally, Zhang Shun thought that the basis of the astronomical calendar was very simple and he could learn it by himself.

As a result, as the discussion between the two parties gradually deepened, Ge Chengke slowly talked about the "Arc Arrow Technique" used in "The Time Calendar".

The so-called "Arc Arrow Technique" is generally about the method of arc calculation.

It turns out that the Huntian theory has been developing and changing since its establishment.

At first, people still had objections to the sentence "The earth is like a chicken's egg." Some people also thought that the earth was flat or a semicircle.

But as astronomers continued to measure and calculate, they finally proved that the earth is round.

Since then, when making astronomical calculations, it is natural to use the arc calculation method, and then we have deeply studied the so-called "arc arrow technique".

It's just that Zhang Shun didn't expect that Ge Chengke would pull out the fourth-order equation and solve it after calculation, which made his eyelids jump.

However, as Zhang Shun learned more and more, he gradually understood.

Traditional Chinese astronomy is actually a discipline based on the "Huntian Theory" as its basic principle and a large number of observations and calculations.

According to Zhang Shun's understanding, the so-called "Huntian theory" is actually a geocentric theory to a certain extent.

Of course, due to the problem of human perspective, the astronomy of most civilizations actually started with the geocentric theory, which does not matter.

But traditional astronomy is extremely weird. They don't seem to be very interested in building celestial models. The main thing is to work hard to create miracles.

One is a large number of observations. For example, Monk Yixing and later Guo Shoujing set up a large number of observation points from south to north, from west to east, and calculated many staggering things.

For example, the length of the meridian, and the diameter of the earth, so Chinese astronomy established the concept that the earth is round very early.

The other one is hard calculation, no matter what model or model, our main focus is "big data".

What solar eclipse is not right? Calculate!

What lunar eclipse doesn’t match? Still counting!

Of course, Mercury and Venus are all included!

Even Tang Shunzhi in the mid-Ming Dynasty believed that the most important things to study the calendar were "calendar theory" and "calendar numbers", among which calendar numbers include dead numbers and living numbers.

The former refers to various number tables, while the latter refers to various algorithms.

To put it bluntly, in one sentence, let’s forget it!

Under the guidance of this idea of ​​working hard to achieve miracles, Chinese algebra has developed greatly.

As a result, he was many years ahead of his contemporaries in Europe in solving higher-order equations and algebraic equations. I am afraid this is also the fundamental reason why European missionaries have repeatedly suffered in calculations.