Chapter 590: Textbook issue~!

The construction of Yanhuang Academy is in full swing, but Li Zexuan is not idle, and it is very hard.
"Oh~! This speed is not good~! It's been almost half a month, and only two textbooks have been written. This speed is a little bit hang around~!"
Li Mansion, West Courtyard, Study Room.
Li Zexuan looked at the two textbooks "Mathematics" (Volume 2) and "Physics" (Volume 1) on the table, and sighed.
If someone hears this sentence from him, he will definitely be bitter. You have to know that compiling textbooks is done by a great scholar. It would be good to be able to compile one book a year, and this product will be compiled in half a month. Two books, I'm not satisfied yet, this is going to heaven~!
But Li Zexuan was not satisfied at all. The textbooks he wrote were all reminiscent of relevant subjects learned in school in the previous life with perverted mental energy. The speed is naturally unmatched by others, but even so, Li Zexuan still feels too slow. , Because the college is about to open in another half month, and he originally planned to offer four courses to the students first, but now there are two textbooks missing-chemistry and geography~!
Of course, the textbooks he compiled weren't all mechanically applied. It didn't mean what you learned in the first grade of modern elementary school. The first grade of Yanhuang Academy has different educational systems, which determines their learning content at each stage.
At the beginning, he wrote "Mathematics" (Volume 1) at Yanhuang Academy. The content in it already covers all the content of the first and second grades of elementary school, but the group of students in the School of Mathematical Studies have already learned the mathematics of the first volume. It's almost halfway, so Li Zexuan will write the mathematics of the second book.
For the two poor textbooks, chemistry is okay, but it is estimated to be very troublesome to teach, because the chemical symbols in them were read according to the English alphabet in the previous life, but now it is the Tang Dynasty...
You can imagine the scene at that time:
"Students, this is the chemical formula of water molecule "H2O" (H2O), come and come, remember it all~!"
2333333, this picture is so beautiful, I dare not think about it~!
As for the teaching material of geography, Li Zexuan didn't know how to start, because he didn't know what the current territory of Datang included, how should he compile it~? Don't talk about giving him half a month, he won't be able to make up even half a year~!
But this course can’t be established if he doesn’t set up this course. Regardless of the territorial issues, many concepts in this course of geography are very useful, such as the concept of scale in the map, the directions of up-north, down-south, left-west-right-east. Concepts, latitude and longitude, contours, contours, etc.
(The ancient maps were not based on the upper north and lower south, left west and right east. Many ancient Chinese maps adopted the setting of upper south and lower north, left east and right west. This may have something to do with the emperor's "sit north and south". This is just convenient for users to watch, but there are also many ancient maps that use the setting of upper, west and lower east. There is no uniform rule for this)
Regarding latitude and longitude, no one has defined the prime meridian in this era (in modern times, the longitude line that passes through the original site of the Greenwich Observatory in London, England is called the 0 degree longitude, also called the prime meridian). When he wrote the textbook, he could use The original meridian is defined as the longitude and latitude of a typical building in Chang'an City, so that after hundreds or even thousands of years, everyone will look at the map according to the longitude and latitude defined by Datang.
In addition to these, the most important function of geography is to let students recognize the world clearly, and let them know that Datang only occupies a large area in the world map, which will be very useful for the future era of navigation.
"Oh~! How should I compile this "Geography" textbook~? Everything else is easy to say, that is, the mountains and rivers in Datang. Where should I look for information~?"
Li Zexuan twitched his chin, lost in thought.
"Miangong~! Are you still busy~? This is the iced mung bean soup just made by my concubine, so stop and try it first~!"
At this moment, the door of the room was pushed open with a "squeak", and then Han Yuxi, in a thin white skirt, walked in with a small bowl braving the slightest cold air, and she saw condensation lying on the table. Li Zexuan, who was thinking hard, couldn't help but feel distressed slightly.
"Oh~! The lady is here~!"
Li Zexuan returned to his senses, then stood up and looked at Han Yuxi and said, "Heh~! What are you doing with this hot lady~? Look at you, let the people below do these tasks~! Come here! Sit~!"
Han Yuxi smiled, put the mung bean soup on a few cases, and then said dissatisfied: "My husband, you also know that it is a hot day~! Then you have put yourself in the house every day~! My mother and I are worried. You will make yourself boring and sick~! The concubine knows that the grandfather is working on the college affairs, but you can't get tired of it~!"
Li Zexuan's heart warmed~EbookFREE.me~ stepped forward and grabbed Han Yuxi's catkins, and smiled slightly: "The lady don't worry, the grandfather has time, so why can't I take care of yourself~! You can take care of yourself. ~!"
Han Yuxi rolled her eyes and groaned: "Meng-gong is a liar~! Who says that people with kung fu are not afraid of heat~! The old man Lu Guogong has pulled several carts of ice from our house before, and you want to fool me. ~?"
"Ahem~! This..."
Li Zexuan suddenly concluded, Han Yuxi was right. Although they practice martial arts, although they are not afraid of the cold, they are generally quite afraid of the heat, unless you practice the relatively rare type of internal gong with the cold attribute.
Han Yuxi picked up the small bowl, stuffed it into Li Zexuan's hand, and said, "Okay~! The concubine knows that she is busy, but you can drink this bowl of mung bean soup first~!"
How can Li Zexuan disagree~? He quickly nodded and said, "Good, good~! I'll drink it now~!"
After that, he drank the mung bean soup in the bowl as if he were drinking a cow. An arbitrary coldness burst out from the inside out, making him scream "Fresh~!"
Han Yuxi smiled, put the bowl away, and then turned to go out, but she paused slightly at the door and hesitated:
"The Xianggong seems to have encountered something difficult. The concubine's physical ability is limited. I am afraid that it can't help much. However, the Xianggong can go for a walk and relax, or, doesn't the Xianggong have so many friends~? You can go to them to help. ~! There is no need to work behind closed doors~! The concubine has come all the way with the help of many people, otherwise, she can't be married to the Xianggong~!"
After listening, Li Zexuan was silent for a while, and suddenly laughed: "Yes~! Haha~! Lady, you are really my lucky star~!"
………………………
(End of this chapter)