I

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

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

As a result, the surviving Xiao family distributed land as normal as the common people. Real estate, shops, workshops, etc., as long as they can produce a deed certificate, all will be returned to the Xiao family. If the deed cannot be produced, it will be confiscated.

Zhao Zhenfang's journey was unimpeded, and the officials who came and went would stop and greet each other when they saw her.

Seeing such a situation, Xiao Shixuan couldn't guess the truth?

Zhao Zhenfang must be a family member of some high official!

Don't think that some researchers have low EQ. They just focus on different things. In fact, they understand many things and don't seem to care that much.

Take this moment as an example, although Xiao Shixuan guessed the truth, he didn't have any special thoughts. He just came to discuss academics, and he continued the chat if he was happy, and left when the chat was not happy, and he didn't ask anyone to do anything anyway.

"Miss."

"Please inform me that I brought a big one back. This is his mathematics manuscript."

Zhao Han was dealing with official business when he suddenly heard that his younger sister brought someone to see him. He first dug out those mathematics manuscripts, and was immediately attracted by various algebraic symbols, because they were born out of cursive script, and he could still recognize A, B, C, D after careful observation.

After a casual glance, Zhao Han said, "Please come in."

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

"ah!"

Liu Miaotong immediately covered her mouth, she recognized Zhao Han at a glance, because Zhao Han once went to a girls' school to write an inscription and speak.

Zhao Zhenfang's and Fei Rumei's identities were neither deliberately kept secret nor publicized, and few people in the girls' school knew about them.

"Second brother, Mr. Xiao is good at mathematics," Zhao Zhenfang said with a smile, "Mr. Xiao, this is my second brother. He introduced Taixi numbers."

Second brother?

Xiao Shixuan thought that Zhao Zhenfang was the daughter of some high official, but he didn't expect it to be Zhao Han's younger sister. A surprised expression finally appeared on his face, and he cupped his fists and said, "Tai and Xiao Shixuan, meet Mr. Zhao."

"Mr. Xiao, nice to meet you!"

Zhao Han replied with a smile: "Please sit down."

Xiao Shi chose a seat to sit down, subconsciously looked at Zhao Zhenfang, but Zhao Zhenfang winked at him mischievously.

Zhao Han flipped through the math manuscript and asked, "You discovered these formulas and theorems by yourself."

"Sometimes." Xiao Shixuan replied.

"Good job, keep working hard in the future." Zhao Han encouraged.

Xiao Shixuan originally wanted to discuss mathematics, but when he found out that the person he was chatting with was Zhao Han, he immediately said, "Mr. Zhao, I believe that what is more important than formulas and theorems is to change the fundamental concept of studying mathematics."

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

Xiao Shixuan said: "Take equations as an example. We only talk about the calculation of complex equations. It is easier to calculate when using Tianyuan technique together with calculation chips. But I am sure that even if Tianyuan technique is more convenient to calculate, it will definitely be used in the future. Equation algorithm instead."

Using calculation chips to solve Tianyuan Technique, once you get started, it is often easier than solving equations.

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

Xiao Shixuan began to talk eloquently: "The biggest difference between Tianyuan surgery and equations is the unknown number. "Nine Chapters of Arithmetic" Qiuhe is actually a description of three-dimensional linear equations in words, but there are no algebraic symbols and operation symbols. The ancients omitted these symbols, and expressed them directly with counting chips (putting out a matrix). There is a strange book called "Dongping Suanjing", which has been lost for a long time now, but one or two can be inferred from Li Yezhi's works...Qin Jiushao in the Song Dynasty had already used Symbols such as double lines, single lines, etc. to represent addition, subtraction, multiplication, and division..."

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

According to Xiao Shixuan's explanation, Zhao Han roughly understood that there is an ancient book "Dongping Suanjing", which uses nineteen characters such as "Xian, Ming, Xiao, Han... death, spring, darkness, ghost" to represent unknowns power. If A, B, C, and D are added together, equations within the nineteenth power can be expressed with the calculating chip matrix.

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

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

Although mathematicians in the Yuan Dynasty developed the Quaternary Art, which seemed to be more advanced than the Song Dynasty's Sanyuan Art, it was a step backward in terms of mathematics itself.

Because of the wrong path, the unknowns are ignored more and more, the expression of expressions is ignored more and more, and the operation symbols are completely abandoned. Tianyuanshu has been completely reduced to mechanical calculations. It can be understood as a certain program compiled by a mathematician, and future generations can directly use this program to solve problems.

Li Ye, a mathematician in the Kingdom of Jin, was afraid that the scumbags would not be able to understand the program, so he wrote a special book "Measuring the Circle and Sea Mirror", which forcibly gave the calculation matrix a practical meaning, which is tantamount to breaking mathematics away from abstract operations.

After Xiao Shixuan had a taste of modern equations, he immediately noticed that Chinese mathematics was going astray.

From the perspective of hundreds of years later, from the Han Dynasty to the Song Dynasty, the development of Chinese mathematics has not been a major problem, and there is still the possibility of developing higher mathematics.

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

After finally introducing European mathematics in the late Ming Dynasty, the Manchu Qing came to do it again, which completely blocked the development of Chinese mathematics.

Xiao Shixuan said: "Traditional Tianyuan technique, the solution to four elements is already the limit. But the mathematics of Zongzhen has infinite possibilities."

Zhao Han, a liberal arts student, had almost forgotten about high mathematics. He said in shame, "I just put forward some superficial ideas. My talent is limited. The development of mathematics requires the joint efforts of all people."

When Xiao Shi chose this nerd, he seemed to be flattering all of a sudden: "Suiren's drilling wood to make fire is also superficial, why did he ever underestimate his merits?"

"Hahahaha," Zhao Han took out the "Mathematics" and "Geometry" that Xu Ying sent, handed them to Xiao Shixuan, and said, "From next year, all schools at all levels must study them. There is no problem with the first part of "Mathematics". You can compile the theorems and formulas you have discovered into the second half of "Mathematics."

Xiao Shixuan was overjoyed when he heard the words, carefully held the manuscript, cupped his hands and said: "I will definitely do my best to compile the book!"

Zhao Han asked, "Where is your native place?"

Xiao Shixuan replied: "Taihe County."

Taihe County was severely damaged by the rebel Sai Lubu, and the gentry and wealthy families either fled or died, so Zhao Han stopped questioning him about his origins.

"Are you short of money?" Zhao Han asked again.

Xiao Shixuan replied: "There is no shortage of money. The family returned to Taihe County and took back three shops and an oil mill. My father is also the head of the criminal house in Anfu County. It is not inconvenient for me to live in my uncle's house."

Zhao Han thought for a while and said, "Well, I'll give you an official position in the Department of Mission and Education as a doctor of mathematics, and receive a salary according to the rank of county magistrate. From now on, you can study mathematics at ease and don't have to worry about daily trivial matters."

"Thank you Chief Town!"

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

What excites him even more is that before, there was only a Ph.D. in the Five Classics, and now he is appointed as a Ph.D. in Mathematics, which obviously regards mathematics as an equally important subject as the Five Classics.

The two chatted until the General Military Mansion got off work, and the girls almost fell asleep listening to it, and they didn't dare to leave early on their own.

In the end, Zhao Han personally delivered Xiao Shixuan's ceremony out of the house, causing the officials of the General Military Mansion to look sideways.

After the pair of cousins ​​left, Zhao Zhenfang smiled and said, "Second Brother, have I done meritorious service this time?"

"Remember your great service." Zhao Han said happily.

Fei Rumei was puzzled: "Is knowing arithmetic a talent?"

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

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

What to do now is to sow the seeds and carefully cultivate the seedlings.

Back in the inner house, it's not time for dinner.

Fei Rulan greeted her with a smile: "What a good thing happened today, and I actually have a happy face."

"You can see that?" Zhao Han couldn't help laughing, "I'm delighted to have a young talent."

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

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

From Chongzhen's accession to the throne to Chongzhen's six years, the national salt tax owed more than 3.2 million taels, and the Lianghuai salt tax alone owed more than 2 million taels. At that time, all provinces were ordered to make up the amount quickly. Now that the three-year deadline has expired, some provinces still have not made up the full amount.

Investigate severely!

At the same time, this year's taxation is also in a mess, because there are military disasters everywhere, and local officials always ask for a year's delay in arrears.

No tax due to military disaster?

What kind of money does the imperial court use to train troops and suppress bandits!

As a result, provinces like Henan, Huguang, Nanzhi, Jiangxi, and Guangdong, while agitating for rebels and being pressed for taxes by the court, could only step up their efforts to exploit the people.

As for the two provinces of Shaanxi and Shanxi, Chongzhen was too embarrassed to urge them. These two places have been suffering from severe drought for ten consecutive years.

Ten years into Chongzhen in a blink of an eye, the first thing the court did was to send a large number of tax censors.

Chongzhen was also frightened by the eunuchs, and he didn't dare to let the eunuchs collect taxes again. This time the tax envoys were all seventh-rank civil servants.

At the same time, Yao Yongji, Zuo Buzheng of Zhejiang, Zeng Daowei, Zuobu Zheng of Huguang, Chen Hongmi, the prefect of Suzhou, Han Wenjing, the prefect of Yangzhou, and Zhou Guangxia, the prefect of Huai’an...Because they could not pay their taxes in full, they were deprived of their grades and positions, but they continued to work. Until the taxes are paid in full, the official position will be restored.

Ding Kuichu, who thought he had successfully escaped, was still held accountable by the court because Jiangxi taxes were in arrears for many years. This guy retired from his old age and returned to his hometown. Just after the Lantern Festival, he was arrested and sent to Beijing to be imprisoned for questioning.

Then, Chongzhen and Zhao Han went stupid together.

Spring droughts are severe across the country, and this year is destined to be a catastrophic year.

On Zhao Han's side, there was a severe drought throughout Jiangxi.

From the beginning of spring to the end of spring plowing, there was no rain in Jiangxi's prefectures, and officials from all over the country even began to pray for rain.

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

In the ten years of Chongzhen, Shaanxi and Shanxi will not be mentioned. The most terrifying thing is that it spread to Zhejiang, which is the most wealthy place in the world: "Ten years, there was a great famine in Zhejiang, and father and son, brothers, and husband and wife ate each other."

There is also: "Twelve years, Liangji, Shandong, Shanxi, Shaanxi, and Jiangxi were famine. Henan was famine, and people ate each other."

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 officers and soldiers.