Xiao Shixuan had come to the General Military Mansion before, and came with his father Xiao Weigong.

After Fei Ruhe led his troops to drive away Sailubu and seize the entire Taihe County, the father and son came to inquire about the policy of returning to their hometown.

As a result, the living Xiao family is as normal as the people. Real estate, shops, workshops and so on, as long as the deed can be produced, all of them will be returned to the Xiao family. If the deed cannot be produced, it will be confiscated.

Zhao Zhenfang went all the way unimpeded, and when the officials saw it, they would stop and greet him.

Xiao Shixuan saw such a situation, where could he not guess the truth?

Zhao Zhenfang must be the family of a big official!

Don't think that some people who do research have low emotional intelligence, they just have different focuses, in fact, they also understand many things, and they don't care so much.

At this time, although Xiao Shixuan guessed the truth, he didn't have any special ideas. He just came to discuss academics, and if he was happy, he continued, and if he was not happy, he left, and he didn't ask for anything anyway.

"Miss."

"Please let me know, just say that I brought a big one back. This is his math manuscript. ”

Zhao Han was handling official business, and suddenly heard that the little sister brought someone to ask to see. He first turned out the data manuscripts, and was immediately attracted by various algebraic symbols, because he was born from cursive writing, and he could still recognize A, B, C, D when he looked closely.

After a few casual glances, Zhao Han said, "Please let them in." ”

Not long after, three girls came in with Xiao Shixuan.

"Ahh

Liu Miaotong immediately covered her mouth, and she recognized Zhao Han at a glance, because Zhao Han had been to the girls' school to give an inscription speech.

The identities of Zhao Zhenfang and Fei Rumei were not kept secret, nor were they deliberately publicized, and few people in the entire girls' school knew about them.

"Second brother, Xiao Gongzi's mathematics research is good," Zhao Zhenfang said with a smile, "Xiao Gongzi, this is my second brother, and the Taixi number was introduced by him." ”

Second brother?

Xiao Shixuan thought that Zhao Zhenfang was the daughter of a big official, but he didn't expect it to be Zhao Han's sister. He finally showed a surprised expression on his face, and then clenched his fists and said, "Tai and Xiao Shixuan, please meet Mr. Zhao." ”

"Mr. Xiao, it's a good luck!"

Zhao Han smiled and returned the salute: "Please take a seat." ”

Xiao Shixuan found a seat to sit down, and subconsciously looked at Zhao Zhenfang, but Zhao Zhenfang winked at him mischievously.

Zhao Han flipped through the mathematical manuscript and asked, "These formulas and theorems were all discovered by yourself. ”

"Occasionally." Xiao Shixuan answered.

"Well done and continue to work hard in the future." Zhao Han encouraged.

Xiao Shixuan originally wanted to discuss mathematics, but after finding out that the chat partner was Zhao Han, he immediately said: "Mr. Zhao, I think that what is more important than formula theorems is to change the fundamental concept of studying mathematics. ”

"Oh, please." Zhao Han felt a little surprised.

Xiao Shixuan said: "Take equations as an example, only the calculation of complex equations, and it is easier to calculate with Tianyuan with calculations. However, even if the Tian Yuan Technique is more convenient to calculate, it will definitely be replaced by the equation algorithm in the future. ”

Using arithmetic chips to solve Tianyuan Technique, as long as you get started, it is really easier than solving equations in many cases.

Zhao Han asked, "Why do you say that?" ”

Xiao Shixuan began to talk eloquently: "The biggest difference between Tianyuan and equations is the unknown. The "Nine Chapters of Arithmetic" is actually a text to describe the system of ternary equations, but there are no algebraic symbols and operation symbols. The ancients omitted these symbols and expressed them directly in the form of arithmetic chips (laying out a matrix). There is a strange book called "Dongping Sutra", which has long been lost, but it can be inferred from Li Ye's writings...... Qin Jiushao in the Song Dynasty already used symbols such as double lines and single lines to represent addition, subtraction, multiplication, and division ......"

Zhao Han listened very carefully and carefully, although he had never even heard of these ancient arithmetic books and mathematicians.

According to Xiao Shixuan's elaboration, Zhao Han roughly understood that there was a book of "Dongping Sutra" in ancient times, which was based on "immortals, Ming, Xiao, and Han...... Nineteen characters such as death, spring, darkness, and ghost" to represent the unknown power. If we add A, B, C, D, we can use the arithmetic matrix to express the equation within the nineteenth power.

During the Southern Song Dynasty, Qin Jiushao created operation symbols.

However, the invasion of Jin and Yuan led to an abrupt halt in the development of mathematics in the Song Dynasty.

Although the Yuan Dynasty mathematicians came up with the quaternion, which seems to be an improvement over the ternary technique of the Song Dynasty, it is a regression in terms of mathematics itself.

Because the path has gone wrong, more and more ignorance of the unknown, more and more neglect of the expression of arithmetic, and completely abandon the notation of arithmetic. Tian Yuan Shu has completely degenerated into a mechanical operation, which can be understood as a mathematician who makes up a certain program, and later generations can directly use this program to solve problems.

Li Zhi, a mathematician in Jinguo, was afraid that the scumbags would not be able to understand the program, so he wrote a book called "Measuring the Circle of the Sea Mirror", and forcibly gave the calculation matrix a practical meaning, which was equivalent to detaching mathematics from abstract operations.

After Xiao Shixuan appreciated modern equations, he immediately noticed that Chinese mathematics had gone astray.

From the perspective of a few hundred years later, from the Han Dynasty to the Two Song Dynasty, the development route of Chinese mathematics is not a big problem, and there is still the possibility of developing higher mathematics.

However, the invasion of the Jin Kingdom and the Mongols led to a great regression in mathematical thinking.

Finally, at the end of the Ming Dynasty, European mathematics was introduced, and the Manchu Qing Dynasty came to do it again, completely blocking the development of Chinese mathematics.

Xiao Shixuan said: "In the traditional Tianyuan technique, solving the four elements is already the limit. And the mathematics of the town has endless possibilities. ”

Zhao Han, a liberal arts student, had almost forgotten about high mathematics, and he said shamefully: "I just put forward some superficial ideas, my talent is limited, and the development of mathematics still needs the joint efforts of people all over the world." ”

Xiao Shixuan is a nerd, and he seems to suddenly be a sycophant: "The Suiren clan drills wood to make fire, which is also superficial, how can he have diluted his merits?" ”

"Hahahaha," Zhao Han took out the "Mathematics" and "Geometry" sent by Xu Ying, handed them to Xiao Shixuan, and said, "From next year, schools at all levels must study." There are no problems in the first part of Math, and you can compile the theorem formulas you have found into the second half of Math. In the future, mathematics will also be a compulsory subject. ”

Xiao Shixuan was overjoyed when he heard this, carefully took the manuscript, and said, "I will definitely do my best to compile the book!" ”

Zhao Han asked, "Where is your hometown?" ”

Xiao Shixuan replied: "Taihe County." ”

Taihe County was harmed by the anti-thief Sai Lu Bu, and the gentry and wealthy families either fled or died, and Zhao Han no longer interrogated the other party's origins.

"Is there a shortage of silver?" Zhao Han asked again.

Xiao Shixuan replied: "There is no shortage of money, the family returned to Taihe County and got back three shops and an oil mill. My father is also the head of the prison in Anfu County, so it is not inconvenient to live in my uncle's house. ”

Zhao Han thought for a while and said, "In this way, I will give you an official position, hang it in the Department of Missions and Education as a doctor of mathematics, and receive a salary according to the grade of the county Cheng." In the future, you can study mathematics with peace of mind and no longer have to worry about daily chores. ”

"Thank you, Headquarters!"

Xiao Shixuan is very happy, he likes to read idle books since he was a child, and he has never been recognized by the world, but now he is valued by Zhao Han.

What excites him even more is that he was only a doctor of the Five Classics before, but now he is appointed as a doctor of mathematics, obviously considering mathematics as a subject as important as the Five Classics.

The two chatted until the General Soldier's Mansion got off work, and the girls were almost asleep, and they didn't dare to leave on their own in advance.

In the end, Zhao Han personally sent Xiao Shixuan's gift out of the door, which made the officials of the General Military Mansion look sideways.

After the pair of cousins left, Zhao Zhenfang smiled and said, "Second brother, did I make a meritorious contribution this time?" ”

"You're credited with a great credit." Zhao Han said happily.

Fei Rumei was puzzled: "Is it also a talent who understands arithmetic?" ”

Zhao Han said: "This person not only understands arithmetic, but also has such knowledge at a young age, and will definitely become a generation of mathematicians in the future." ”

Zhao Han is still very confident in the development of mathematics in China, or the development of science. As long as mathematics is included in the imperial examination, with China's population base and the wisdom of its people, it will definitely be able to catch up with and surpass Europe.

Now all we have to do is sow the seeds and carefully nurture the seedlings.

Back in the inner house, it's not time to start eating.

Fei Rulan greeted with a smile: "I met something good today, and I was so happy on my face." ”

"You can see that?" Zhao Han couldn't help but laugh, "I'm happy to get a young talent." ”

Zhao Han was very happy, but Chongzhen was overwhelmed by the finances.

At the end of the year, he finally found a place to start, because the salt tax had not been collected.

From Chongzhen's ascension to the throne to Chongzhen's six years, the national salt tax owed more than 3.2 million taels, and the two Huai salt taxes alone owed more than 2 million taels. At that time, the provinces were ordered to make up for it as soon as possible, but now that the three-year period has expired, some provinces still have not made up the full amount.

Investigate and deal with it fiercely!

At the same time, this year's tax payment is also a mess, because there are military disasters everywhere, and the magistrates always ask for a year to be in arrears.

If you suffer a military disaster, you won't be taxed?

Then what kind of money does the court use to train soldiers and suppress thieves!

As a result, provinces such as Henan, Huguang, Nanzhi, Jiangxi, Guangdong and other provinces were making trouble with anti-thieves and being urged by the imperial court to pay taxes, so they could only step up their exploitation of the people.

As for the two provinces of Shaanxi and Shanxi, Chongzhen was embarrassed to urge, and these two places have been in drought for ten consecutive years.

In the blink of an eye, the first thing the imperial court did was to send a large number of tax collectors.

Chongzhen was also frightened by the eunuchs, and did not dare to let the eunuchs collect taxes again, and this time the tax envoys were all seven-grade civil officials.

At the same time, Yao Yongji, the political envoy of Zhejiang Zuobu, Zeng Daowei, the political envoy of Huguang Zuobu, Chen Hongmi, the prefect of Suzhou, Han Wenjing, the prefect of Yangzhou, and Zhou Guangxia, the prefect of Huai'an...... Because he could not pay his taxes in full, he was deprived of his rank and office, but he continued to work until he had paid all the taxes and then resumed his official position.

Ding Kuichu, who thought he had succeeded in slipping away, was still held accountable by the imperial court because Jiangxi had been in arrears for many years. This goods returned to his hometown, and just after the Lantern Festival, he was arrested and sent to Beijing to be imprisoned for questioning.

Then, Chongzhen and Zhao Han were stupid together.

The spring drought is severe across the country, and this year is destined to be a year of great disaster.

On Zhao Han's side, there is a severe drought in the whole territory of Jiangxi.

From the beginning of spring to the end of spring ploughing, it has not rained in various provinces in Jiangxi, and officials in various places have even begun to pray for rain.

In fact, there was a drought in Jiangxi last year, and there is only one sentence in the "History of the Ming Dynasty": "Nine years...... Jiangxi is also hungry. ”

Chongzhen ten years, Shaanxi and Shanxi will not be mentioned, and the most terrifying thing is that it has spread to Zhejiang, which is the world's wealth: "Ten years, Zhejiang has been hungry, and fathers and sons, brothers, and husbands and wives cannibalize each other." ”

Later: "Twelve years, Lianggi, Shandong, Shanxi, Shaanxi, Jiangxi hunger." There was a great hunger in Henan, and people were cannibalistic. ”

This is a nationwide drought, known as the "Chongzhen drought" in history, and the drought in Jiangxi will last for three to four years.

The time to test Zhao Han has come, and the disaster is far more difficult to deal with than the officers and soldiers.