Guide to Traveling through the Northern Song Dynasty.

Chapter 118 0113 [When durians are ripe]

Influenced by his teacher Yang Shi, Chen Yuan specialized in water conservancy, shipbuilding, and military strategy.

If you want to be proficient in these three things, you must have a good mathematical foundation.

Zhu Guoxiang, Zhu Ming and his son took out simple numbers (Arabic numerals) and threw out a bunch of arithmetic symbols.Chen Yuan didn't pay much attention at first, but after only a few minutes, he realized how practical these things are.

He already knew addition, subtraction, multiplication and division, the principle of fractions, and even the simple method of opening alchemy (the method of increasing, multiplication, and opening and Tianyuan technique were not invented until the Southern Song Dynasty).

After memorizing the new numbers and symbols, it only took Chen Yuan half a day to practice mathematics from elementary school to junior high school.It's not how genius he is, but those things, he has already mastered them, and it's just a new way to express them.

By the second day, the principles of geometry had already begun.

This is what Chen Yuan has learned long ago, but the method of Zhu's father and son is more intuitive and concise than the traditional expression.

The changes and formulas of plane geometry finally slowed down Chen Yuan's learning speed.

During lunch, Chen Yuan couldn't help but said: "Although arithmetic is miscellaneous, it is close to Taoism, and it is of great benefit to the family, the country, and the world."

Zhu Ming has been digging through the library these days, trying to find sage endorsements for the promotion of mathematics.The first thing to read is the annals of the history books of the past dynasties, because miscellaneous studies are all in it.

He said at this moment: "Arithmetic is not close to the Tao, but it is a part of the Tao. "Hanshu" and "Houhanshu" Lv Lizhi, a word: the world is first formed, and the characters are created, then the number will follow. Things happen. It is also said: Counting is ten million, so counting things follows the principle of life and fate. "Yi Shu" (ancient text Shangshu) also said: first count their fate."

Chen Yuan said: "The "Book of Han" is the words of historians of later generations, and it cannot be regarded as the teaching of sages. The words of "Yi Shu" are sufficient and can convince the public."

Although some people in the Song Dynasty suspected that "Guwen Shangshu" was a forgery, it has not yet become the mainstream view.

Therefore, the four words "first count your fate" can be used as an argument for promoting mathematics.

These four words are not meant to tell someone's fortune. "First" refers to the ancient sage kings, Yao, Shun and Yu governing the country, they must first establish calculations to order all things, and establish calculations to regulate the world's personnel.When Ban Gu was still annotating the "Shangshu", he said that "Ming Baishi" means the unified law of weights and measures.

Therefore, the promotion of mathematics is not to indulge in miscellaneous learning, but to go back to the past, and to trace the way of the sage king!

Zhu Ming continued to throw out the argument: "Confucius also said in the "Book of Changes" that in ancient times, people tied ropes to rule. After the word, it becomes a number. The ancient sage kings used arithmetic to govern hundreds of officials and people. Are we ordinary people more powerful than sages? Can we abandon arithmetic to pursue the Dao and govern the country?"

"Of course!"

Chen Yuan was easily persuaded because he was proficient in mathematics, not to mention "Shangshu" and "Yi Zhuan" as evidence.

In ancient and modern China and abroad, if you want to spread new ideas, you must use the guise of "retro".

There was the ancient Chinese movement in the Tang Dynasty, the Six Classics Annotated Me in the Song Dynasty, the revival movement in the Ming Dynasty, and the Renaissance in Europe.They are all a group of thought pioneers, using retro to break the confinement, and using retro to express new ideas.This can be quickly recognized by the public, thus forming a trend of thought and widely accepted in society.

Zhu Ming then came to the conclusion: "The Dao is in the books of sages. Confucius explained very clearly how to govern a country, and the "Shangshu" also explained very clearly. It is necessary to 'establish the number first'. Times change, and in ancient times , The country is small and the people are few, and you can remember things by knotting a rope. During the time of the Three Kings, the country became larger and the people more, and numbers were needed. Now, in the Song Dynasty, the territory is vast and the population is billions. More complex numbers must be used. Today's sages and great scholars have extensively annotated the Six Classics, but no one has improved the algorithm. We should work hard to make up for it!"

This point of view establishes the rationality and necessity of improving mathematics, and it also uses Confucius and "Shangshu" as endorsements.

Chen Yuan agreed with this very much, but sighed: "It's a pity that the imperial examination to obtain a scholar has already abolished Mingshu."

When the imperial examinations were reformed in the Song Dynasty, all subjects were merged into the Jinshi subjects, and the Mingshu subjects, which were specialized in mathematics, were cancelled.Today, only Ming Fa has been restored, which mainly examines the law, with a few math problems along the way.

The imperial examination is not taken, and mathematics is not prosperous.

Unless someone succeeds in rebelling, mathematics is forcibly added to the imperial examination.

After dinner, the janitor came to clean up the dishes, and Chen Yuan continued to do geometry exercises.

Zheng Hong came to see him: "Zhu Xianggong, Dalang, the family ancestor hosted a banquet and invited the two of you to discuss the sale of Junzi tea."

"Yes," Zhu Guoxiang asked, "when will we have the banquet?"

Zheng Hong said: "The next few days will do, it just depends on which day the two of you are free."

Zhu Guoxiang said: "It's noon tomorrow."

"Waiting for the two great drivers." Zheng Hong said happily.

Fatty Zheng has left, but Chen Yuan is still immersed in the questions, asking for answers from time to time.

Father and son, with golden fingers in their bodies, have a clear memory of what they have learned.But it was inevitable that they forgot to teach a certain formula, Chen Yuan asked a question, and they added the formula.

As far as Chen Yuan's learning speed is concerned, he can basically master plane geometry in a month or two at most, after all, he already has the relevant knowledge base.

The next morning, the father and son went down the mountain together.

As soon as I walked to the gate of the academy, I saw two bamboo vehicles parked there.

Zhu Ming said casually: "A gentleman does not replace animals with humans, he can just walk down the mountain."

The students of the academy who heard this remark all praised him as a real gentleman, and quietly pretended to be coercive.

If Zhu Ming became the emperor, he would definitely not say this again. At most, he would restrain officials not to sit in sedan chairs.Because carrying a sedan chair belongs to the service industry, which can solve the employment problem, and governing the country is not a gentleman.

All the way to Zheng's house, the front door was wide open.

The father and son walked in through the main entrance, Zheng Lan and his children and grandchildren greeted them in the front yard.

Big businessmen like the Zheng family already adopted a three-meal system, and it was not time for meals at this time, so they were invited to rest in the garden.

The early-blooming flowers have already bloomed, the garden is beautiful, and snacks are also served. Zheng Lan brought out the best group tea to entertain.

Zheng Lan added charcoal to make tea herself, and said: "My grandson is naughty, and he learned a lot of serious skills from Dalang in the past. I thank you here."

Zhu Ming said with a smile: "Little officials are smart, not stupid."

"There are small cleverness, but no great wisdom," Zheng Lan said flatteringly, "The two of you use the way of a gentleman to make a gentleman's tea. This is called great wisdom. This old man admires it."

Zhu Guoxiang said: "Occasionally, it is just a start-up. Wait until next year, the tea-frying technique will be more mature, and the taste of Junzi tea will definitely be better."

Zheng Lan happily said, "We'll wait and see." Then he asked, "How many catties can I produce this year, and how much can I produce next year?"

Zhu Guoxiang said: "It is definitely no problem to produce a few hundred catties this year, and it is unknown how many thousand catties will be produced next year."

"Excellent, this old man can rest assured." Zheng Lan stroked his beard and smiled.

In modern tea mountains, the annual output of one mu can reach two to three hundred catties, but that is due to the addition of technology.

Converting both mu and jin into modern units, in the Tang and Song Dynasties, the yield per mu of tea mountains was generally below 150 jin, and very few could reach 180 jin.Daming Village has more than 300 mu of tea hills. Due to poor management, the average yield per mu is only 120 catties, all of which are used to make fried tea, and the annual output is more than 3 catties.

Don't look at the high price of good tea in big cities, that is the market price after taxation.

The ex-factory price of tea garden owners is countless times lower, and first-class tea only sells for more than 80 yuan per catty.Even if the tea in Daming Village is all first-class tea, and the tea tax is not paid, the annual income can only be more than 2000 guan.

This is of course impossible. There are only a few first-class teas, and most of them are second- and third-class teas. An annual income of more than 1000 guan is enough.

The tea tax also has to be paid. After all, Zhu Ming is not a bandit. He has to take part of the tea and go through the procedure of the tea horse company just like the old Bai Yuanwai.The government in Xixiang County is easy to bully, but the tea and horse department in Xixiang County can't ignore it. It's very troublesome to offend those people.

After deducting the tea tax, freight, and production costs, the annual net profit is estimated to be below [-] guan.

This is because the cost of frying tea is lower. If you steam the tea like the old Bai Yuanwai, the net profit of two to three hundred per year will be the sky-high - the old Bai Yuanwai only makes money by selling private tea. If you sell it, you will lose [-]% of it.Because in addition to tea interest, there is also tea garden tax, which is also charged according to the proportion of tea production.

"Wong Weng!"

A girl suddenly ran in, grabbed Zheng Lan's arm, and kept shaking and coquettishly: "Ms. Min's family sent someone to ask me to go for a spring outing on March [-]rd. My mother won't let me go, so I'm going, I'm going!" go..."

"Okay, you go, you go." Zheng Lan smiled.

The girl said happily: "I still want to bring a lot of delicious food, so I'll call the sister of the Li family."

Zheng Lan nodded and said, "Call everyone, let your brother stay with you, don't have any accidents."

The grandfather and grandson were talking there, and the father and son were also chatting privately.

Zhu Guoxiang said in a low voice: "This little girl, do you feel like any celebrity?"

Zhu Ming asked: "Who do you look like? Di Lieba, Guli Nazha, or Malzaha?"

"What a mess," Zhu Guoxiang said, "I mean she looks like Li Lizhen."

Zhu Ming looked puzzled: "Who is Li Lizhen, I have only heard of Li Shizhen."

Zhu Guoxiang was very speechless. After all, there are two generations. There is no common topic in this regard, so he can only popularize science: "Li Lizhen is a Hong Kong star and has made many good movies."

"Oh," Ju Ming seemed to be opened up in memory, "I remembered, did you film "When the Durian Is Ripe"?"

Zhu Guoxiang's face turned black, and he could tell that his son was making fun of him.

"Isn't it 'When the Durian Is Ripe'?" Ju Ming was still pretending, "It must be "When the Cherries Are Ripe", or "When the Bananas Are Ripe"."

Zhu Guoxiang stopped talking.

Zhu Ming had a smirk on his face: "Dean Zhu, you must have seen this movie, what kind of fruit is ripe?"

"You can shut up!" Zhu Guoxiang glared at his son.

(End of this chapter)