"Fourth, I wonder if the prince can know Sinan?"

Front Hall of Li Mansion.

Li Zexuan looked at Li Xiaogong and asked.

"Of course I know how many of these things are in the Qintian Supervisor, what's wrong?"

Li Xiaogong replied strangely.

According to the Record of Ancient Mines, Sinan first appeared in Cishan, Hebei during the Warring States Period. It was originally used for feng shui, but there was no archaeological object. It took a long time from Sinan to the compass. At least the compass hadn't appeared in the early Tang Dynasty.

During the Kaiyuan period of the Tang Dynasty, Qiu Yanhan, a Kanyu artist in Shanxi, was praised by later generations of Kanyu as the founder of the earliest positive needle method among the three needles (positive needle, stitch needle and middle needle) of the compassion technique. This person may be the earliest inventor of the magnetic needle .

In the early years of the Northern Song Dynasty, our country created another guide tool-the guide fish, which was made of a thin piece of steel and shaped like a fish. It is two inches long and five minutes wide. The belly of the fish is sunken. It can float on the water like a boat. Fish made of steel sheets are not magnetic, so there is no guide. If you want it to be a guide, you must use manual magnetic transfer to make it a magnet with magnetism.

In the Northern Song Dynasty, Zeng Gongliang and others used predecessors' materials to compile the "Wu Jing Zong Yao", which introduced the preparation method of guide fish in detail. As for the method of making water-floating magnetic needles, it was first seen in "Mengxi Bi Tan" by Shen Kuo in the Northern Song Dynasty. The application of the compass in navigation was the earliest when Zheng He sailed to the West in the Ming Dynasty. In this era, the compass was invented, and it is estimated that no one would have thought of using it for navigation.

That’s right, the gift Li Zexuan wanted to give to these tens of thousands of teams was the compass. This thing was a navigating tool. During the Song and Yuan dynasties, the compass invented by my country spread to many countries in Europe and Asia, making it popular in modern Europe. Ocean expedition becomes possible. Of course, European countries have completely risen up through ocean navigation and established colonies, and we...

"Lord, Sinan's spoon handle can point to the south well no matter how it rotates. Through it, we will be able to distinguish the direction in the vast ocean! This way we won't get lost."

Li Xiaogong’s eyes lit up. Although he hadn’t been in the sea, he didn’t know how many water battles he had fought. He said excitedly: "Haha, you guys have so many spooky ideas. Only you can think of using Sinan for sailing. Now! But..."

Having said this, he frowned and said, "But Sinan is too large, and it might be inconvenient to put it on the boat."

Li Zexuan smiled and said: "The prince doesn't have to worry about this problem. The kid knows something and can point out the direction, and he is very light and easy to carry. If the prince needs it, the kid can make a few in the workshop today and send it to the palace. When the time comes, the prince will know at a glance."

"Is there such a fetish? Then you have to make it as soon as possible. It's not a few days before the start of the army!"

Li Xiaogong is really fortunate that he has come this time today, and the reward is so great!

Li Zexuan was about to nod, and suddenly remembered something: "The kid is very willing to help the prince. It's just that the kid is still in a full-term ban and can't go out or go to the workshop in person. In this way, the progress will be much slower."

Although the ban allowed him to leave for many days, it would be inconvenient if he needed to go out for something. For example, today’s revision of the "Datang Daily", when he thought of an idea yesterday, he had to bother writing to teach them. How to change it, how convenient is it to say it in person.

Li Xiaogong said nonchalantly: "This is not a big deal. This king will go to the palace in a while and ask your Majesty to postpone your ban on footing. The military situation is urgent. Your Majesty will be able to accommodate this small matter."

Li Zexuan joyfully said: "Thank you, Lord!"

"It's okay, then, Xiaoxuan, do you have anything else to say about the things you need to pay attention to when you go to sea?"

"There is a little bit more."

Li Zexuan groaned: "The prince, this time the 20,000 navy army, the kid suggested that the prince choose as many elite soldiers as possible. They can not only win the water war, but also the land war, and the weapons must be fully prepared."

Li Xiaogong's eyes flashed and she said coldly: "Xiaoxuan, what do you mean...we will not only encounter water battles, but also fight with others on land?"

Li Zexuan nodded and said:

"Well, it is very possible. There may be pirates on the water. As for the land... Lord, the goods you carry in the fleet are very valuable. Those gorgeous silks and exquisite porcelain are valuable to Nanyang. For the people outside of China, it is no different than gold, and it is hard to guarantee that they will not be malicious.

With a little carelessness, the 20,000 troops led by the prince will encounter those small countries, and the whole country will attack them, and the entire fleet will be embarrassed and embarrassed on all sides. The original intention of the fleet going south this time is indeed for trade, but the defensive heart is indispensable. If others are the first to use force to break the rules, I think of the time, the prince does not need to be merciful, right? "

Li Xiaogong wrinkled his brows and said coldly: "Fanwai Xiaoguo, if you dare to offend my celestial power, this king will definitely draw his sword and drink blood, and raise my Tang Tianwei!"

Li Zexuan exclaimed: "The prince is so bold! It's getting late, so why don't the prince and Uncle Qin have dinner at the kid's house!"

Li Xiaogong chuckled and said, "I heard that your kid is eating and drinking. You are quite accomplished. Then it happens that this king is at your house today, taste your food and wine, haha!"

Qin Qiong also nodded and smiled: "Haha, it should be so, count the days, Xiaoxuan, you and Yu Xi are about to get married, the old man, as Yu Xi's foster father, hasn't eaten in your house yet!"

Li Zexuan said with sweat: "Ahem, it's the kid who didn't think about it!"

"Haha!"

..................

the other side.

Meng Wenhao read the newspaper on the bridge pier for a while, and he naturally focused on the last few paragraphs of the newspaper. He was really excited about the generous rewards for writing, and he also thought of writing in his free time. ~lightnovelpub.net~ But he just thought about it, and immediately rejected it.

First of all, the school work in the school is inherently tense and the competition is fierce. He also wants to take the monthly exam to get the opportunity to take the family to the Zuixianlou for a free meal. Normally, if the family is Let go of eating and drinking in Zuixianlou, you can eat at least fifty or sixty pens. If you order a drink, it will be more expensive. This is more cost-effective than writing!

On the other hand, writing would definitely delay school, his father and his mother would definitely not allow it, nor would he allow it.

Shaking his head, dispelling this unrealistic idea, Meng Wenhao looked at the sun above his head, and then got up to go home for lunch. Only then did he realize that he was near Yongdafang, and he went blind all the way in the morning. Swinging, I came to a place so far away from home without knowing it.

Meng Wenhao sighed and walked to the house.

"Don't move! Rob!"

When he walked to Xuanyifang, Meng Wenhao suddenly heard a low man's voice in the lane between Xuanyifang and Feng'anfang. He was shocked, and quickly turned sideways to the corner of the wall, carefully taking a peek at the situation inside the lane.

I saw a big man in a gray shirt with a black cloth pulled from an unknown source on his face, holding a chilly kitchen knife in his hand, standing on the neck of an eleven or twelve-year-old girl, impressively It is a picture of robbery in broad daylight.

.........................

Let me tell you the bad news. Tomorrow Xia Ke is going to run a job fair again. Mu method, there are students around who have got offers. Xia Ke is anxious! If you don’t run, hurry up and get gg! Tomorrow's update will be late, but it will definitely not be interrupted! Sorry!

Thank you for your luck again and again twice!

(End of this chapter)