At the beginning of December, people from the Northwest Province came to bring two good news.

Early Dynasty, Taiji Palace.

"Your Highness."

"Your Highness."

At the gate of the Taiji Palace, people greeted him warmly when they saw Li You, who was not plain and faceless.

Wei Zheng asked, "Your Highness, what is the good news for you to come today?" ”

Li You smiled: "That's nature. ”

Gao Jingming asked, "What good news?" Let's give the minister a thorough look first. ”

Li You smiled: "Let's wait for the court to talk about it together." ”

Soon, the pilgrimage began.

Li Chengqian first called the name and asked Li You to announce the news from the Northwest Province.

Li You received a battle report from the Northwest Province last night, and he had already notified the military headquarters and Li Chengqian that night, and Li Chengqian specially asked Li You to announce the news in the morning court.

Li You didn't care about this merit, but he had to vigorously publicize it, and he couldn't bury the merits of the soldiers who fought bravely in the Northwest Province.

Li You announced that Cheng Yanjin, Xue Rengui and others had conquered the Kingdom of Gram and added tens of thousands of miles of territory and hundreds of thousands of people to the Tang Dynasty, and the ministers were very excited.

Recently, there have been frequent good news, and the territory of the Tang Dynasty has continued to expand, and every Tang Dynasty person feels extremely proud.

Li Chengqian instructed the Ministry of War, the Ministry of Officials, and the Zhongshu Province to draft a commendation for the officers and men of the Western Expeditionary Army, and to report it to Li Shimin for approval.

After the early dynasty, Fang Xuanling, the eldest grandson Wuji, Wei Zheng, Gao Jingming, Cen Wenwen, Chu Suiliang, Wei Chigong, and Huangfu Rui, who were important ministers of the court in Chang'an, were summoned to the Liangyi Palace, and Li You reported an epoch-making and astonishing news.

Li Duan led the students of the radio study class and placed a square box on the table, on which was a thin stick inserted, and on the top was attached something like a chicken claw. There is also a device with a crank handle, which is attached to the top of this square box with wire.

Li Duan pointed to these devices and introduced them separately: "This device is called a radio station, this one is called an antenna, and this one is called a hand-cranked generator. ”

Everyone didn't know anything about these new terms, and they were all confused.

The eldest grandson Wuji asked, "What are these things for?" ”

Li Chengqian had already received Li You's popular science in advance, and he was so excited that he was laughing. He hurriedly said, "Ladies and gentlemen, this is a good thing! It can be called a downwind ear. Thousands of miles away, they can communicate through this device, just like two people talking face to face.

For example, the news from my father can be transmitted in an instant through this radio station.

In the future, no matter where you are or what is happening, as long as you have this thing, you will know immediately. ”

Wei Zheng said suspiciously: "Your Royal Highness the Prince, what are you saying here, through this, Your Majesty will know immediately, is this the case?" ”

Li Chengqian said: "Yes. ”

The crowd was not convinced.

Li Chengqian smiled: "I know that all of you don't believe it. So be it, seeing is believing. ”

After speaking, he said to Wei Chi Gong: "General Wei Chi." ”

"The minister is here." Wei Chi saluted and said.

Li Chengqian said: "You can leave Chang'an with a radio station now, go to Fanglin Gate, and then we will make contact." ”

"Yes, Your Highness, the minister obeys." Wei Chigong led people away.

Taking advantage of the time spent waiting for Wei Chigong, Li Duan popularized the knowledge of radio communication to everyone.

Suddenly, the light on the radio station on the table went on, and the telegraph operator began to copy the telegram.

Soon he finished copying it and handed the telegram to Li Duan. Li Duan took out the code book and quickly translated the content on it.

Wei Chigong's telegram said: "The minister has arrived at Fang Lin Gate to greet His Royal Highness the Crown Prince and all the adults. ”

"Huh? It's true! The crowd was stunned.

Li Chengqian said: "Call General Wei Chi back and ask him to report the name of the official of the city gate of Fanglin Gate and the number of guards guarding the gate." ”

The operator tapped the electric keys in his hand, making a tick-tock sound.

After a while, the light on the radio came on again. The telegraph operator received the telegram again.

The telegram said that there were 50 guards at Hong Lim Gate, and there were 47 on duty now. One of them was on leave, and two were sick. The name of the city gate official is Liu Shouqing.

"Oh my God, that's amazing." The crowd was in an uproar again.

Fang Xuanling asked, "How far can the farthest contact distance be?" ”

Li You smiled: "Theoretically, it can reach infinity, but in order to ensure the clarity of the signal, it is necessary to limit a certain range." Thousands of miles are no problem. ”

When the radio station was first invented, the electromagnetic environment in the air was very good at that time, and a ten-watt radio station could transmit thousands of miles. In the modern sky, radio signals are as many grains of sand as the desert, and the transmission effect is much worse.

Wei Zheng said: "This is a big event that changes the entire human life, and it is of great significance. ”

Li You said: "Lord Wei is right, this is a great piece of equipment, with epoch-making significance. From then on, it will change the rhythm of human life and cause extremely major changes in the political, economic, military, and cultural affairs of the entire human race. ”

Li Chengqian said: "This is a great invention, with this kind of communication equipment, Datang will be invincible in the world." ”

Fang Xuanling, who was born in the Ministry of War, said: "With such communication equipment, it will have a major impact on the entire military strategy, and this technology must be firmly in the hands of the Tang Dynasty people, and it must be strictly controlled and kept secret." ”

Next, the people discussed the management methods and confidentiality matters of the radio station, and decided to establish the Datang Telegraph Administration, which was temporarily limited to the use of high-level military officials and departments directly under the imperial court.

At present, the number of Datang Radio stations is only 24, and the authorized use is limited to Li Shimin, Li Chengqian, and Li You.

Subsequently, Li Chengqian sent people to the Eastern Expeditionary Army with three radio stations to report to Li Shimin. In order to ensure smooth communication, one of the radio stations was set up in Jizhou as a backup relay station.

Qi Wangfu.

When Li You returned to the house, Xiao Wanyu took a telegram from Wu Xu and others, and said excitedly: "Brother You, take a look, the second sister and they all miss you, and ask when you will go back?" ”

Li You read the telegram and said, "You call them back, just say that we miss them too, and after a while, we will go back to Kabul together."

Also, you tell them to keep in touch with the radio at any time, and contact Chang'an in time if there is anything. ”

"Okay, I'll send the report." Xiao Wanyu left happily.

Soon after, Li Shimin called, and he said in the telegram that the invention of the radio station was an extremely important matter, and the significance of this matter was even greater than that of Goguryeo.

For Li Shimin, the supreme ruler, the importance of means of communication is self-evident. With such advanced means of communication, he can control the situation throughout the country, no matter where he is. Therefore, he attaches great importance to this matter.