Great Ming National Teacher

The two first visited the rubber factory, which was small in scale, but it was already in operation. The workers wore neatly painted blue overalls and were mixing rubber in the factory building. This rubber factory was also owned by Feng Yuan, and Li Yunya was building I came to the factory once at the beginning, and this is the second time I came to the factory. Overall, I seem to be quite satisfied.

After leaving the rubber factory, the two went to the post office. At the beginning of this year, a new telegraph office was established under the Tianjin post office.

Li Yunya brought electromagnetism to the Ming Dynasty. Under the name of Xu Guangqi, he specially opened up a school of electromagnetism to conduct in-depth research. From the most basic such as power supply, voltage, current, and resistance, gradually to capacitors, transformers, potentiometers, inductors, Research on semiconductors, etc.

The initial use of electric energy was limited to converting mechanical energy into electrical energy through generators, and then converting electrical energy into mechanical energy through electric motors to drive various textile machines, water pumps, mixers, mills and other machinery to work.

Later, Li Yunya remembered the telegram, and went to tell Xu Guangqi that he didn't know the principle of the telegraph, he only knew to determine a string of numbers by the length of the sound, and then find the corresponding Chinese characters through the numbers.

After Xu Guangqi heard about it, he said "it's simple" and handed it over to his two assistants. It took those two assistants three months to meet Li Yunya's request.It is very simple to say, that is to add an iron bell with an electromagnet, the releaser presses the switch, the electromagnet is energized, the hammer is drawn to strike the iron bell, and a sound is made, the releaser releases the hand, the electromagnetic disappears, and the hammer is raised, and so on. The length of the beating interval and the number of times determine the number, and then the number is restored to Chinese characters through the code book.

In fact, the simplest and original transmitter only took those two assistants one day to complete, and the rest was to compile the code book. Wood, water, fire, and earth are divided into five categories, and every five numbers represent a Chinese character. A total of nearly [-] Chinese characters can be accurately described, which is enough for use.

Li Yunya built railways, trains and ships to solve some traffic problems. This time the invention of the telegraph was used to solve communication problems. He rewarded the two stoppers with a thousand silver dollars each, and promoted them to a higher level, making them flattered In fact, they are not very willing to do this kind of telegram. For them, this thing is too simple, and there is no sense of accomplishment when it is completed. The reason why they work so hard is that they want to finish it as soon as possible and return to Xu Guangqi's group To continue to study "Thousands of Miles Transmission".

At first, Xu Guangqi thought that the various miraculous objects Li Yunya brought out were fairy arts, and he only admired and marveled at them. Later, with the deepening of research, he understood their principles and functions, and turned to deciphering imitations.

He set up a project to disassemble the two walkie-talkies for research, trying to figure out how they echo each other and communicate through the air. Li Yunya explained the principle to him, and Xu Guangqi then decomposed it into two parts, a separate project, and one part is radio , part of which is sound-to-electricity conversion. After a long time of radio research, there has been no progress, but sound-to-electricity conversion has gradually begun to take shape.

Through Li Yunya's dictation and practice, it was confirmed that the sound was generated by vibrations. When people spoke, the coil was driven to vibrate in the magnetic field to generate a constantly changing current, and the acoustic signal was converted into an electrical signal and transmitted to the other side. Conversely, depending on the different changes of the current, the coil vibrates in the magnetic field to produce sound. This is the basic principle of the microphone and the speaker.

There are two main difficulties that have not been overcome at present. One is the human speech vibrating the coil. The current generated by moving in the magnetic field is too weak. How to amplify it is a very difficult problem. The second is the end of the speaker. The coil receives the electrical signal. How to make a sound when vibrating in the magnetic field is also quite difficult. Once these two problems are overcome, they will create a sound transmission comparable to fairy art. Although they still need wires to be unable to speak through the air, they will also be famous in history. , Eternal fame!

For this reason, neither Xu Guangqi nor the two assistants were interested in the telegram Li Yunya said, and they just wanted to finish it quickly so that they could go back and study Qianli Transmission.

Li Yunya is very concerned about the telegram. He doesn't expect the Academia Sinica to come up with a phone so quickly. It is good to have a telegram. These days, the main means of sending letters is to send letters by flying pigeons, and to expedite them by horses. The speed is too limited, and the risk is very high. For example, carrier pigeons are caught by eagles and kites at every turn. , You can receive it there, whether it is for the central control area or the horizontal communication between various places, there is a qualitative leap.

More than 2000 years ago, Qin Shihuang unified the country, no longer divided the feudal system into feudal lords, and changed to centralized power, integrated the whole of China into a whole, unified weights and measures, coins and characters, built roads across the country, and laid horse-drawn carts to run. According to the track, China ended the feudal society 2000 years earlier than the West.

At this time, Europe in the eighth year of Chongzhen is experiencing a 30-year war of chaos. The feudal social system cannot be ended until the end of this all-European war, which is 2000 years later than our Qinhuang!

Ending the feudal system early can make the country more integrated and avoid future splits. In the thousands of years of history in China, most of them were in a unified state, and in the end they were not as fragmented as Europe. It can be said that Qin Shihuang contributed a lot.

However, although Qin Shihuang established the system of prefectures and counties, the lowest governing unit is as far as the county, and the village level is almost self-governing, mainly because of the constraints of transportation and communication methods. China is too big, and officials from Guangzhou go to Beijing. It takes two or three months for the report to arrive, and it takes half a year to come and go. The time is spent on the road, and the most effective and accurate management cannot be achieved.

From the beginning of the reform, Li Yunya asked officials to build roads across the country, and even planned several railways connecting the most important parts of the country as the main transportation arteries. The north-south travel is much faster than before. If you drop the money, you can immediately connect thousands of miles away, which has a decisive effect on the development and operation of the country!

The telegraph poles from Beijing to Tianjin had already been set up, and the wires had been connected. Li Yunya and Zhu Youjian came to the telegraph office. The director here, Liu Yun, also came from a military academy, and brought people out to greet them.

Li Yunya asked: "What's the matter? Can it be used?"

Liu Yun said excitedly: "After four days of continuous debugging, it can be used normally."

"Okay, you contact Beijing now, just say that the emperor and I are here, and ask them to send another official message."

Liu Yun immediately asked the dispatcher from the Academia Sinica to sit on the chair. The dispatcher was Dou Xiaobao, who was only fifteen or sixteen years old. The two most powerful men in the empire were so nervous that there was no place to put their hands. Li Yunya patted him on the shoulder: "Don't be nervous, just do as you usually communicate."

The boy was so excited that tears filled his eyes, and he didn't know what to say. His lips moved, and finally he bowed to Li Yunya, and then to Zhu Youjian, then sat on the chair and started pressing the button on the transmitter. of the knife switch.

First press and hold for half a minute, then press back for 15 seconds after hearing the ringtone in Beijing. The half-meter-high desk clock counts the seconds by long-pressing or short-pressing. After a while, he stopped and started to receive. He picked up a pen and paper, waited for the bell to ring, and began to record the numbers.

"Ring! Ringing..."

The electric bell rang constantly, and Li Yunya and Zhu Youjian were sitting on chairs drinking tea. Zhu Cixuan looked left and right curiously with wide eyes: "Father, what is this..."

"Hush..." Li Yunya looked serious and motioned him not to speak.

The child hurriedly folded his small hands to cover his mouth, his big eyes murmured and looked at Li Yunya and the sender in puzzlement.

It took about half an hour. After the reception was completed, the transmitter turned off the transmitter, took the recorded paper and compared it with a dictionary to start deciphering.He is the son of a criminal official. After the coup d'état in the fourth year of Chongzhen, Zhu Youjian started killing people, with heads rolling and blood flowing like rivers. He committed a major crime of rebellion, implicated nine clans, and countless families were torn apart. Li Yunya took in more than 2 people who were not sentenced to death. The family members of the prisoners, including men and women, old and young, were sorted and resettled. Most of them went to the Fengyuan Theater, and some went to the factory.

Dou Xiaobao was only ten years old at the time, and followed his sister into the theater to act. Later, Li Yunya asked their children of the right age to study in the new school, and Dou Xiaobao went. He studied hard and graduated from elementary school ahead of schedule. When the academician of the Academia Sinica came to find an assistant, he saw that he was clever and recruited him, and this time he was sent to Tianjin as a dispatcher.

He has regained his official household registration from his original slave status as a prisoner. He earns ten silver dollars a month, and the unit provides food and housing. He has already planned that when he saves enough money in the future, he will go to the theater to redeem his sister's body, let her get out of the actor's profession, and find someone to marry.

After the numbers were obtained from the telegram, they corresponded to the Chinese characters in the dictionary. According to the law of the five elements, a series of formulas were compiled. Economy 21.

Dou Xiaobao flipped through the dictionary and deciphered all the contents of the telegram in just 5 minutes. It was a poem written by Wang Bo of the Tang Dynasty: "The city gate assists the Sanqin, and the wind and smoke look at the Wujin. The meaning of parting with the king , the same official traveler. There are confidants in the sea, and the world is like neighbors. Inaction is on the wrong road, and the sons and daughters share the towel."

Zhu Youjian took the translated note and was very happy: "Okay! Good! The world is like a neighbor, with this telegram, it is really a world! Yun Ya, I will repair the telegram to Ningyuan in the future, and I will directly report to Lu Xiangsheng. Ask about the battle at the front!"

"Well, this is easier than the railway, as long as the poles are erected and the wires are connected, not only in Ningyuan, but also in Chang'an, Nanjing, Zhengzhou and Guangzhou in the future!" The telephone has been developed, so the telegraph is still the main thing for now. He wants to set up a project at the Academia Sinica to develop and improve the telegraph, and strive to connect the main state capitals of all provinces and provinces in the country within three years. When the conditions are ripe, it will be opened to civilian use. , One silver dollar per word is also a big gain.