"There's such a magical thing? Is it easy to make? "Li Longji finally understood.
It was called a telegraph. If two people were far apart, they could send messages to each other in the blink of an eye.
"It's not easy. Without the triode, the transmission distance is limited. We need to set up a telegraph receiving station in the middle of the road."
Li Yi shook his head gently. Semiconductors were developed to increase the transmission distance of telegraph signals.
Otherwise, if they set up a point dozens of kilometers away and received the message from the previous point, they would not need to translate it and send it directly.
The transmission would continue until the destination was reached.
This speed was actually quite fast. At least, it was faster than riding a horse.
The disadvantage was that there were too many relay stations. If one of them had a problem, the message would be inaccurate.
"How long will it take?" Li Longji became anxious again.
"One year if it's fast, two or three years if it's slow. It's easy to say. The main thing is the electronic components. Otherwise, I can make a simple one for you now. It uses batteries. "
Li Yi had a simple telegraph mechanism and did not need to amplify the signal.
"More advanced than surveillance technology?" Li Longji remembered the set in the palace and the one in Zhuangzi.
Li Yi opened his eyes wide and shook his head vigorously. "It's too far away. Even if you give me ten years, I won't be able to make that set."
If his technology had reached the level of making surveillance equipment, he would have made an atomic bomb long ago.
How many basic industries would that involve?
No, there was no need to make an atomic bomb. The munitions factory would make AK series rifles and remake bullets.
There was no need for cannons. A few thousand people with an AK each could destroy a country.
"Oh!" Li Longji was a little disappointed. He really hoped that there would be more of those things so that he could monitor the entire Chang 'an.
If the distance could be further, he would just throw it at the Protectorate General.
He did not know that what he was thinking of was already used by Li Yi at that time.
If he installed surveillance cameras at home, as long as there was a signal, no matter where he was, he would be able to see it on his phone.
"Right now, the most important thing is to build the relay station. Even if there is a telegraph, it's only for transmitting messages. The relay station is more important for the military and the people's livelihood."
Li Yi did not want to bite off more than he could chew. Starting from the basics, the only thing that the Tang dynasty did not need technology was the relay station.
"It should be completed before autumn. At the same time, the newspapers will be officially published."
Speaking of this, Li Longji seemed to be in a good mood.
In the Tang dynasty, relay stations were being set up. Other places were a little slower, but the border was about to be set up.
At the same time, the best horses were assigned to the courier stations from the border to Chang 'an, so that they could send messages using the extreme speed of the horses.
Where the horse could not go, the speed of the courier was tested. What the courier needed to do was to run from one point to another. By the time they reached their destination, they would have no strength at all.
Hand over the letter and relay it to the relay station.
Of course, he couldn't be alone every time. What if he fell on the road, was bitten by a snake, or was taken away by a tiger …
"Brother Yi, tell me about the goods that you want to sell to the Japanese Empire." Li Longji knew about the currency and was preparing to trade with the Japanese Empire.
The first time he went there, he bartered.
"Li Family Zhuangzi's tea leaves, embroidery, good kitchen knives, short curved plows, soap, rock sugar, chili powder, and dried diced carrots."
Li Yi thought for a while and said a few things.
Li Longji did not care about other things, but he was interested in plows. "Give them good farming tools?"
"For trade, they must be led by people from the Japanese Empire. They must replenish their water at some places before going to Ping Cheng or the capital."
Li Yi explained the reason. He believed that the envoys of the various states and countries had already collected the things that the people of the Tang dynasty used. If he did not give them to them, would they not say anything?
He could restrict the physical objects, but he could not erase their memories.
Since he could not stop them, he might as well be generous.
Currently, the capital of the Japanese Empire was in Nara, so they had to go around Kyushu.
There were coal mines in Kyushu, and another place with many coal mines was in Hokkaido.
There was a place on Kyushu that was specially used to receive envoys from other countries. It was Fukuoka Prefecture, and it was also an important military base.
However, trading with Kyushu would not make much money. Ping Cheng or the capital was the key.
The goods could be transported by sea to a place called Osaka by Li Yi in the Gyeonggi District. After traveling for dozens of miles, the goods could be transported to the capital of the Japanese Empire.
The capital there was like the capital of the Tang dynasty. The people there were relatively rich.
"What do you want?" Li Longji was indifferent. Anyway, since Li Yi said to prepare these goods, he would prepare them.
"Copper, silver, and ores are also fine. Adjust the price. In addition, I want raw silk, cooked silk, and silk fabrics from the Japanese Empire."
Li Yi gave him the things he needed.
The current smelting and embroidery technology of the Japanese Empire was still not good enough. Historical records showed that for decades, this was how the trade was done.
The Japanese Empire used silk to weave cloth and exchanged it for embroidery from the Tang dynasty.
Copper was also given to the Tang dynasty to exchange for copper coins from the Tang dynasty, Kaiyuan Tongbao.
Silver was even more so. If the technology was not good enough, they would be at a disadvantage in trade.
At the thought that the Japanese Empire was willing to exchange for Kaiyuan Tongbao, Li Yi added, "Bring Zhuangzi's exchange coupons over. The coupons are also very exquisite."
"They won't accept it, right?" Li Longji felt that if other countries gave him paper money, he would not accept it.
"Give it to them for free. When the next batch of goods is sent over, allow them to use the coupons to buy things." Li Yi thought of a good idea.
When the coupons were sent over, the people of the Japanese Empire would be curious about them and write the amount of money on them.
The key was that the paper money was beautiful and could not be copied.
If they knew that they could use it to buy goods from the Tang dynasty next time, would they try to trade it themselves?
Even if they did not trade, the paper money would not be thrown away.
The next time they went to the Tang dynasty, they would allow people with paper money to buy things. The credibility of the paper money would be guaranteed.
They would even bring some merchants and goods from the Japanese Empire to the Tang dynasty and let them see the use of the exchange coupons in the Tang dynasty.
Li Longji took this matter seriously. He learned how to use money to bully people. "This is a good idea."
Li Longji got what he wanted and left happily.
Two days later, Li Longji officially received the envoys from the Japanese Empire.
The Japanese Empire was not a vassal state of the Tang dynasty, so the letter of credence was equal.
The envoys gave something, and Li Longji gave something in return and rewarded the envoys.
The banquet continued. Everyone ate and drank. Li Longji asked some questions about the Japanese Empire.
After the banquet, the envoys from the Japanese Empire returned to the Four Quarters Embassy happily.
The Tang dynasty was not bad, and the emperor of the Tang dynasty was also friendly. Then, it was time to move on to the next step.
They found the person in charge and asked to write a letter to the Prime Minister.
They were anxious and wanted to confirm some technology as soon as possible.
They did not count on gunpowder. It was used for war, and the formula could not be given to their own country.
They should be able to print it, right? They said they were going back to print books and Buddhist scriptures from the Tang dynasty.
They did not know if they could give the hot air balloon. What reason could they give? Could they fly from Japan to the Tang dynasty? Could they pass the message quickly?
Also, it was best to send someone to teach them medical books. Reading books was not as good as having someone teach them.
Then, they asked Li Yi if he was willing to be the Japanese envoy of the Tang dynasty to Japan for an exchange.
When they passed by Henan, they were planting a new kind of rice. It was said that it had a short maturity period. Could they bring a ship of seeds back?
With these thoughts in mind, Abeda Nakamaro wrote a letter to Song Jing and asked an official to deliver it.
Song Jing saw the letter and shook his head helplessly. "Dream on. Li Yi will not agree."
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