That night, Ling Hao repaired a book, and the crow finally realized its mission, fluttered lightly, and flew away in the darkness of the night.

"Childe, do you still want to write today?"

"Write, how can this not be written?"

The two of them are now a bit like Cao Xueqin and Yan Zhai, Ling Hao is polishing the manuscript while letting Yao Rong read the story, so the two of them often discuss it until late at night before going to bed.

But it's a shame that this is the case, otherwise you might not be able to finish this story.

"Seven Weapons", the fifth part has been written, with Yao Rong by the side to help me deal with it, and the control of the feelings of female characters in the story is better than in the previous "Yue Nu Sword".

The rest of the second is estimated to take some time to complete.

"Childe, are you going to start writing the sixth now?"

"That's nature, and to write this, it's about inspiration. ”

"Looks like Childe has already figured it out. ”

"That's not all, there's more to write about in the future. ”

"The manuscript of "Yu Minglu" is ready?"

"Well, there's a story here, you read it. ”

"Okay. ”

......

Half a month later.

"I have confirmed with South Korea that since you are now a noble child, you will be allowed to enroll. Bachelor Zhao looked at Han Ling seriously.

Han Ling was already happy at this time, and now, she finally got back her former aristocratic status.

However, in this process, Ji Qing helped her a lot, and she will definitely have to repay her in the future.

"Great, Master Zhao, I don't know which hall I will be assigned to?

"Well...... this"

An hour later, the same temple.

“...... Why did the mountain chief forcibly stuff me with a disciple this time, or is it a girl with such a bad qualification?"

This has accepted two disciples, is the mountain chief overwhelmed, he has never done this before.

"Teacher, this son is talented and proficient in alchemy, with me, I will definitely not disgrace you in the future, and the disciple will definitely work hard to make this Tongjin Hall shine and become the most powerful hall in the entire school palace!"

"Okay, okay, don't talk too much to me, it's annoying enough. ”

"New here, I don't have much of this doctor's token for the time being, you just follow your senior brother to share it first, and I'll go to the mountain chief to ask for a piece in a few days, and now I have an important thing for you to do......"

"Before you came here, there was already a hairy boy who was a student with me, Ji Qing's hairy boy, he should be in the storage room now, you go and call him back, there should be no one in the storage room now, you just go in and catch the stupidest and most stunned kid back." ”

"Oh, it turned out to be ...... Ji Qing!" Han Ling was a little confused.

"This king's teacher is really different, he just arranged such a character for this king, obviously testing this king, but I really didn't expect it to be so coincidental, and he would be assigned to the same school hall with loyal ministers. ”

"Why are there still students coming in at this time? Go in, ordinary students can only browse for an hour, and they are not allowed to borrow books. "The caretaker of the storage room was obviously a little surprised when he saw Han Ling running in at this time.

It sounded a little weird, she had heard some rumors before, and it sounded like there seemed to be something important in the school palace today, so the students didn't come to the storage room.

"This is the storage room! Even if you stay here and are reluctant to read books day and night, it is estimated that you will not be able to finish the books here! Maybe you can still find the "Taigong Danpu" ...... that has not been circulated outside."

Taigong's "Book of Dan" is rare in later generations, and Huang Lu is straight to the book of rites to get its inscriptions and books (1), but not its original (2).

Read the "Da Dai Li, King Wu Jian (3)" is very well prepared, so it is recorded to leave a good ancient gentleman Yun: "Wu Wang practiced the three days, summoned the scholar and the doctor and asked, saying: 'Evil has a hidden covenant, and the line (4), can the eternal life be for the descendants of the constant?'"

"Taigong Danpu" was originally in the lattice in Jiazi District, but I don't know who borrowed it last time, and it hasn't been returned until now, and the grid is still empty. ”

"Since you can't find Taigong Danpu, you can first learn from the Yellow Emperor Danjing and the Huangshi Vein Nourishing Method in the Yizi District. ”

"Thank you for your advice, I haven't asked the senior brother to ...... yet."

"Ouch, isn't this Senior Brother Zhao of the Wufu Palace? Suddenly, a familiar voice came.

"Ling Hao?!!Why are you here!"

"Of course, I'm here to remind my senior brother that many students from the Wufu Hall are looking for her everywhere. ”

"Senior Brother Ling, are they already ......?"

"Yes, they will find this place soon, oh, by the way, I promised my senior brother the "Island Sutra" last time, and I also brought it by the way, you see......" Ling Hao said and took out a roll of bamboo slips.

"Island Calculations" is a mathematical work of measurement written by Liu Hui during the Wei and Jin dynasties. It is also the earliest work of surveying mathematics compiled by Chinese scholars, and also provides a mathematical basis for cartography.

Zu Chongzhi, a mathematician of the Northern and Southern Dynasties, once annotated the "Nine Chapters of Heavy Difference Diagram". The Tang Dynasty separated the "Nine Chapters of Heavy Difference Map" from the "Liu Hui Nine Chapters of Arithmetic Notes" into a separate book, and named it "Island Calculation" after the first question, "Hope for the Island Today".

In the first year of Emperor Gaozong of the Tang Dynasty (656), mathematician Li Chunfeng and others annotated the "Ten Books of Calculation", as a book for the study and examination of Guozijian, "Island Calculation" is one of the "Ten Books of Calculation", and stipulated that the study period of "Island Calculation" is three years, which is three times the study period of other calculations, which shows the degree of importance of "Island Calculation" in the Tang Dynasty.

It was engraved twice in the seventh year of Yuanfeng in the Northern Song Dynasty (1084) and in the sixth year of Ningzong Jiading in the Southern Song Dynasty (1213). However, the Song carved version of the "Island Sutra" was later lost.

The Southern Song Dynasty mathematician Yang Hui's "Algorithm for Continuing the Ancient Extraction" discussed four kinds of measurement problems, including the island problem from the "Island Calculation", and pointed out that "climbing high and looking at the pine, looking at the wave mouth from afar, is not the art of three hopes?

During the Yongle period of the Ming Dynasty, it was included in the "Yongle Canon", but only Liu Hui's text and Li Chunfeng's notes remained, and Liu Hui's original drawings and Liu Hui's annotations no longer exist.

The Yuan Dynasty mathematician Zhu Shijie's "Quaternary Jade Jian" and "Pythagorean Measurement" are the fourth, sixth, seventh, and eighth questions of the door and use Tianyuan to expound the "Island Sutra" of "Wanghai Island", "Wangshen Valley", "South Wangfangyi", and "Wangqingyuan".

In the Qianlong era of the Qing Dynasty, the scholar Dai Zhen compiled the text of "Island Calculation Classic" from the "Yongle Canon" and included it in the "Siku Quanshu".

The Qing Dynasty mathematician Li Huang wrote "The Detailed Sketch of the Island Arithmetic Scripture" and Shen Qinpei's "The Diagram of the Difference of Weight", both of which were based on Euclidean geometry, but they had lost the original meaning of Liu Hui.

The "Island Sutra" was introduced to Korea and Japan in the Tang Dynasty. The first person to introduce the "Island Sutra" to the West was the 19th-century missionary Wei Liali who came to China.

In 1852, he published a paper in the Beihua Jiebao (the predecessor of the Zilin Xibao): "Notes on Chinese Mathematical Sciences". In the article, he introduced the Book of Island Calculations, saying that it was "a book of nine questions on practical trigonometry......

Although Ling Hao's own mathematical thinking is not good, but he can follow this manuscript to copy the rigid script, this science tyrant likes arithmetic, and if he wants to make friends with others, of course he has to do what he likes.

"Thank you, Senior Brother Ling, but now it's time for me to go, Senior Brother, if you see them, just say, I've never been here, you know?"

"Don't worry, brother. ”