Otaku Engineer in Great Tang Dynasty

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The construction of Yanhuang Academy is in full swing, but Li Zexuan is not idle, and he is still very hard.

"Hey~! This speed is not good~! It's been almost half a month, and I have only written two textbooks. It's a bit daunting at this speed~!"

Li Mansion, West Courtyard, Study Room.

Li Zexuan sighed while looking at the two textbooks "Mathematics" (Volume 2) and "Physics" (Volume 1) on the table.

If someone hears his words, they will definitely give him a slap in the face. You must know that compiling textbooks is a matter of learning from Confucian scholars. It is not bad to compile one book a year, and this one has been compiled in half a month. Two, I'm still not satisfied, this is going to heaven~!

But Li Zexuan was not satisfied at all. The textbooks he wrote were all about using perverted mental power to recall the relevant subjects he had learned in school in his previous life. The speed was naturally unmatched by others, but even so, Li Zexuan still felt that it was too slow. , because in half a month, the academy is about to start, and he originally planned to offer four courses to the students, but now there are still two missing textbooks - chemistry and geography~!

Of course, not all the textbooks he wrote were improvised, not to say what the first grade of a modern primary school learns, and what the first grade of Yanhuang Academy learns. The different educational systems on both sides determine that the content of their learning at each stage is also different.

At the beginning of the "Mathematics" (Volume 1) he wrote in Yanhuang Academy, the content in it already covered the whole content of the first and second grades of primary school, but the students in the School of Mathematics had already learned the mathematics in the first volume. It's almost halfway through, so Li Zexuan will write the mathematics of the second volume.

The two textbooks that are still lacking, chemistry is good to say, but it is estimated that it will be very troublesome to teach, because when he read the chemical symbols in his previous life, he read it according to the English alphabet, but now it is the Tang Dynasty...

You can imagine the scene at that time:

"Students, this is the chemical formula of the water molecule, "h2o" (h2o), come and come, remember it~!"

2333333, this picture is simply too beautiful, I dare not think about it~!

As for the textbook of geography, Li Zexuan didn't know how to start, because he didn't know what the current territory of the Tang Dynasty included, how should he compile it~? Don't say give him half a month, he can't make it up even if you give him half a year~!

But he didn't set up this course and he couldn't do it. Aside from the issue of territory, many concepts in this course are very useful, such as the concept of scale in the map, the direction of north, south, left, west and right east. Concepts, latitude and longitude, the concept of contours, contours, etc.

(Ancient maps are not based on the upper north, lower south, left west and right east. Many ancient Chinese maps adopt the setting of upper south, lower north, left east and right west. This may not be unrelated to the emperor's "sitting north and facing 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 regulation for this)

Regarding longitude and latitude, no one has defined the prime meridian in this era (in modern times, the longitude passing through the original site of the Greenwich Observatory in London, England is called the 0-degree longitude, also called the prime meridian). The prime meridian is defined as the meridian that a typical building in Chang'an City passes through, so hundreds or even thousands of years later, everyone will look at the map according to the meridian and latitude defined by the Tang Dynasty.

In addition to these, the most important role of geography is to let the students recognize the world and let them know that the Tang Dynasty only occupies a palm-sized piece of land on the world map, which will be very useful for the future era of great navigation.

"Hey~! How should I compile this "Geography" textbook~? The rest are easy to say, they are the mountains and rivers in the Tang Dynasty. Where should I go to find information~?"

Li Zexuan twitched his chin and fell into thought.

"Xianggong~! Are you still busy~? This is the iced mung bean soup that the concubine just made, stop and try it first~!"

At this moment, the door of the room was pushed open from the outside with a squeak, and Han Yuxi, who was wearing a thin white dress, walked in with a small bowl with the slightest chill. She saw that she was lying on the table. Li Zexuan, who was thinking hard, couldn't help but feel a little distressed.

"Oh~! The lady is here~!"

Li Zexuan came back to his senses, then stood up and looked at Han Yuxi and said, "Heh~! What are you doing so hard on this hot lady~? Look at you hot, let the people below do all the work~! Come over here! Sit~!"

Han Yuxi smiled, put the mung bean soup on a few cases, and then said dissatisfiedly: "Xiang Gong, you also know that it is a hot day~! Then you have been locking yourself in the house every day recently~! My mother and I are worried. You will make yourself sick~! My concubine knows that my husband is working on the academy, but I can't get tired of it~!"

Li Zexuan's heart warmed, he stepped forward to grab Han Yuxi's soft weed, and smiled slightly: "Miss, don't worry, the husband has a kung fu, and the mere heat can't help me~! You just take care of yourself~!"

Han Yuxi rolled her eyes and said angrily: "Xiang Gong is lying again~! Who said that people with kung fu are not afraid of heat~! Lu Guogong and his old man have pulled several carts of ice cubes from our house before, and you still want to fool me. ~?"

"Cough cough~! This..."

Li Zexuan suddenly concluded, Han Yuxi was right, although they practiced martial arts, although they were not afraid of severe cold, they were generally quite afraid of heat, unless you practiced the relatively rare cold-type internal skills.

Han Yuxi picked up the small bowl, put it in Li Zexuan's hand, and said, "Okay~! My concubine knows that Xianggong is busy, but you should drink this bowl of mung bean soup first~!

"

How can Li Zexuan disagree~? He nodded quickly and replied, "Okay~! I'll drink~!"

After that, he drank the mung bean soup in the bowl like a cow, and a wanton coldness and coolness exploded from the inside out in an instant, making him couldn't help shouting "Refreshing~!"

Han Yuxi smiled, put away the bowl, and then turned to go out, but she paused at the door and hesitated:

"Xianggong seems to have encountered something difficult, and his concubine's ability is limited, so I'm afraid I can't help you. However, Xianggong can go out for a walk and relax, or, doesn't Xianggong have so many friends~? You can ask them for help. Ah~! There is no need to work behind closed doors~! Since I was a child, my concubine has entrusted the help of many people, otherwise, I will not be able to become husband and wife with my husband~!"

After listening to Li Zexuan, he was silent for a long time, and suddenly laughed: "Yes~! Haha~! Madam, you are really my lucky star~!"

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