Wanli Xinming

Chapter 150
Zhu Yijun and Zhu Zaiyu entered the alley talking, and they were so excited that they asked the eunuch to take out some paper, rulers, and some charcoal pens, and said to Zhu Zaiyu: "Sir, look at this, this is what I think about. math problems."

Zhu Zaiyu heard that the emperor did not always say "arithmetic" but "mathematics", he turned his mind and had a general feeling about how the emperor viewed this subject in his heart.He didn't know what Zhu Yijun had accomplished in this regard, so he calmed down to see what the emperor was thinking about.

Zhu Yijun took a ruler and drew on the paper a coordinate system that junior high school students in later generations would draw, and then wrote a formula of "A=B2", and easily drew a standard parabola.

Putting down the pen, Zhu Yijun smiled and said to Zhu Zaiyu: "Sir, please take a look. I have seen artisans and laboratories researching problems. Graphics are graphics, and arithmetic is arithmetic, but there is no technique that connects the two-this is something I came across by accident. method, named 'coordinate system', can also make?"

Zhu Zaiyu took the paper and looked at it, then opened his mouth wide open, his face full of shock.The equations written by the emperor are nothing special. There are linear equations in the "Nine Chapters of Arithmetic". Mathematicians in the Song and Yuan dynasties have advanced Chinese classical mathematics to more than four yuan.

This Cartesian coordinate system is nothing special. You can easily draw it with a ruler.

However, this simple rectangular coordinate system is the first time that humans have unified "number" and "shape", marking that mathematics has truly become a modern science from today.Before that, it was divided into two disciplines, called algebra and geometry.

In the history of China, because of the huge population and the need for the management of the great empire, the development of algebra is not much behind the world at this time.But in geometry, because it did not get the introduction of Egyptian geometry like ancient Greece, it has been in a backward position.Until Western learning spread eastward, the Chinese were unable to draw a regular pentagon.

However, with the expansion of water conservancy in the empire and the production and construction of major imperial factories, the application of geometry is also expanding.On average, Zhu Yijun takes at least a quarter of an hour every day to solve various problems summed up by craftsmen and laboratories, and also brings a few disciples.

Although these disciples could often approach Zhu Yijun, he didn't have time to teach them hands-on, so he could only leave a few words and let them study the rest by themselves.

To tell the truth, mathematics is a subject that desperately needs genius, and Zhu Yijun's so-called "disciples" in the laboratory cannot even absorb the knowledge he taught.

Finally, Zhu Zaiyu, the top smart man in the contemporary era, appeared. When a native genius and a traveler met, the chemical reaction produced was earth-shattering. Just like that, Zhu Zaiyu, who was kneeling on the ground with his five bodies on the ground, showed the general expression.

Later, Zhu Yijun used charcoal on white paper to demonstrate to Zhu Zaiyu the use of negative numbers to draw graphs and solve equations; he proposed related concepts such as sequence, prime number, set, complex number, function, probability, irrational number, operations research, etc. It's all about junior and senior high school knowledge - an hour later, seeing that Zhu Zaiyu's eyes were already spinning in an irregular spiral, he stopped.

Zhu Zaiyu was 40 years old at the time. He learned astronomy and arithmetic from his uncle He Tang in his early years. Later, when he was a son, he visited famous scholars and teachers.

However, after listening to Zhu Yijun's lecture for a long time today, Zhu Zaiyu always wanted to cry with a flat mouth.He kept shouting in his heart: I have lived in vain for half my life. Compared with the emperor, my uncle can't even match the hair on his legs.

Zhu Yijun was startled when he saw that his face was ashen, as if one of the pillars he was most proud of and made him independent of the world had been cut down.Can not help but comforted:
"Sir, you don't need to belittle yourself. What I'm talking about today is all based on blind thinking. You know, I don't have much time to study."

After saying this, Zhu Zaiyu seemed to be pumped up and couldn't sit still on the pier. Seeing this, Zhu Yijun hurriedly said: "I just listened to the prince's arithmetic, and I don't know much about it. You and I will be two days later. How close, let's study together. I think that this knowledge still needs you to continue to study, and I am beating the drum next to me. "

When Zhu Zaiyu heard this, his eyes froze.Then he moved his lips, hesitating to speak, his face tangled.Seeing this, Zhu Yijun asked, "Does the prince have anything to say?"

Zhu Zaiyu finally couldn't hold back his tears and cried: "The emperor just said, not for the sake of art, but for the Dao! The minister saw that he was happy, and he wanted to follow the emperor to go to school and be the emperor's servant, but the ancestral system hindered— —”

In the Ming system, the minimum status of the imperial clan is above the lieutenant of the auxiliary country. It is also illegal to leave the fief and enter the capital. Zhu Zaiyu thought that he would leave the capital after the emperor's wedding, where can he learn from the emperor, so he was full of grief.

Zhu Yijun listened, smiled and said, "Sir, you don't have to worry about this, I'm thinking—"

Before he could finish his words, Zhu Zaiyu, who was already out of excitement and incoherent, interrupted: "This minister can give up his clan status and refuse to accept the king. Please be kind to the emperor and keep the minister at your side!" To kowtow.

Before the emperor finished speaking, it was a crime of disrespect for the courtier to interrupt, and Wei Chao, who was standing beside him, moved his lips slightly, wanting to reprimand.Zhu Yijun glanced at him, and Wei Chao hurriedly bowed his head and stood silently.

Zhu Yijun said with a smile: "I know that the prince is eager to learn. The clan problem has become a chronic problem in the Ming Dynasty, and I also have the intention to make some revolutions. I just happened to chat with the prince about this." He turned to Wei Chao and said, "You go to Wenyuan Pavilion and call Mr. Zhang, come here."

Zhu Zaiyu listened, and then he sat down.His father and son had discussed the clan issue facing Daming countless times at home. Seeing that the emperor paid attention to this issue, Zhu Zaiyu put down all the formulas and theorems in his head and echoed:

"Your Majesty is holy. My minister's family is in Henan, and there are no more vassals in the country than Henan. Zhou, Tang, Zhao, Zheng, etc., at this time, there are already seven vassal kings here. Zhou Wang's family, the minister heard that the court gave The salary is 19 shi per year; for the family of ministers, the imperial court gives [-] shi every year, so the imperial court can't be said to be generous to the clan."

"However, the clan, the county king and above, can get the full annual salary, and there are those who occupy the land to pay for the extravagant expenses. But the generals and below are in arrears every year, and the poor clan cannot survive. There are people who have only one loaf of bread and cannot feed their stomachs; there are people who have no room or house to live in; there are people who die without a coffin, there are women who are forty and cannot be married, and there are people who cannot marry a single woman all their lives.”

When Zhu Yijun heard this, his face showed a miserable look, and said: "I know about this matter, and I have read the memorial that the general Fengguo of the Daifu reported to King Sejong, saying, 'The ministers and others are under the closure of the city, their movements are prohibited, and there is no matter of birth. There is no one to rely on, there is no food and clothing for several days, the old and the young are wailing, and there are many difficulties. Some have been exposed for ten years but cannot be buried, some are begging in the market, some are servants, some are living in other places, and some are starving to death. Compassionate."

When Zhu Zaiyu heard it, his face became sad, and he replied: "What the emperor said, it is true, what the ministers saw in Henan, it is far worse. They are all descendants of Taizu and Miao, and they are not able to feed themselves today. It is pitiful and pitiful. The so-called poverty makes evil, and in recent years, many generals and lieutenants of the auxiliary country have been robbed on the road, and even killed civilians, humiliated the officials, and the country has been destroyed."

After saying this, Zhu Zaiyu gave another example: "Before my minister came to the capital, I heard from the people in the mansion that the lieutenant of Luzhou Wangfu Zhenguo repeatedly robbed the road and was arrested and questioned by Yousi, and the Zongren's mansion sentenced several people to hang at one time. Sin, what's your stomach?" After saying this, Zhu Zaiyu gave several examples of clan crimes in recent years, saying that his life was miserable.

Zhu Yijun listened patiently, and then asked sternly: "In the view of the prince, how can we solve this chronic disease of the clan?"

After listening to the question, Zhu Zaiyu replayed: "The minister and the father are at home, and they sighed and sighed for the clan's burden day and night, and discussed many times. With the knowledge of the minister and the minister, the court should take a multi-pronged approach, and let one go. The imperial clan was forbidden to engage in agriculture, commerce, engineering, and military affairs, so that food and clothing no longer depended on the court for food and clothing; the two opened the ban on the clan’s entry into officialdom, and those with literary talents were allowed to enter officialdom, but they were not allowed to hold positions in Beijing and hold military power; three Re-open sectarian studies and give the clan a way to improve in reading."

Zhu Yijun listened, noncommittal, and asked again: "These are all set up by the poor sect, but the prince knows how much the sects in the world devoured the sum of money last year?" Zhu Zaiyu shook his head and said he didn't know.

Zhu Yijun said: "In the fourth year of Wanli, the annual salary of the clan was 550 million shi, which accounted for one-third of the world's food tax! If things go on like this, all the royal revenue will be used to support the clan, and it will not be able to support it at all!"

(End of this chapter)