After the Sanjiadian hydropower project was launched and put into operation, the entire capital city cheered.

Meanwhile, several other research groups at the Institute of Electric Power, Chinese Academy of Sciences, are also working hard to study steam power generation and wind power generation projects.

After the success of the hydropower project, a generator factory was established specifically to produce generator sets.

In addition, the Institute of Hydraulic Engineering and the Institute of Electric Power of the Chinese Academy of Sciences jointly began to survey some rivers near Beijing, preparing to build more reservoirs and dams and construct hydroelectric power projects.

While these matters were in full swing, Li Xin, who was in a side hall of the Forbidden City, was not idle either.

As winter approaches, the entire capital city becomes rather cold.

After the grasslands were pacified, all affairs proceeded in an orderly manner.

Li Xin didn't stay idle because of these matters; instead, he hid in a side hall and busied himself with these tasks.

Nowadays, this side hall near the Wuying Hall in the Forbidden City has become a place where Li Xin often stays.

This is also Li Xin's current laboratory!

During this time, in his "laboratory," Li Xin has been searching for usable and practical technological knowledge in the field of intelligent technology.

Some scientific and technological knowledge was copied into books and sent to the Academy of Sciences for research by people from different research institutes.

For other important projects, Li Xin still personally took charge.

Li Xin is currently testing a very important invention.

Before long, Li Xin had assembled all the parts that had been prepared on the table.

Li Xin frowned as he looked at the somewhat rudimentary object in front of him. Although it looked rather simple, it was exactly the same as the model he had found in the intelligent technology section.

I just don't know how effective it will be.

Thinking it over, Li Xin connected several machines together and turned the crank of the hand-cranked generator. After a while, Li Xin reached out and pressed a few buttons beside him.

The machine emitted a clear "beep beep beep" sound.

Meanwhile, the machine on the table on the other side also emitted a "beep beep beep" sound, and then the robotic arm rose and fell, marking lines on a strip of paper.

Li Xin was stunned when he saw this.

Li Xin was overjoyed.

"It worked?!"

He reached out and tore the strip of paper off, carefully examining the distribution and spacing of the lines, a hint of joy appearing on his face.

However, after a short while, Li Xin decided to try again.

He opened a book on the table, looked at the characters written on it, and then somewhat awkwardly pressed the keys.

"Drip-drop, drip-drop, drip-drop, tap-drop..."

After the different sounds rang out, the machine on the other side also started running at the same time, with the robotic arm rising and falling, printing out intermittent lines on the paper.

After finishing typing, Li Xin stared blankly at the lines left on the paper.

After a long while, Li Xin burst into laughter.

"Hahaha... It's a success! It's a success!"

Li Xin laughed wildly and uncontrollably.

The two machines in front of him were the wired telegraph machines that Li Xin had found in the intelligent technology!

Moreover, it was the earliest wired telegraph machine!

Hand-cranked generators, telegraph transmitters, telegraph receivers, hole punchers...

These combinations formed the earliest telegraph machine!

When the first telegraph machine was invented, there were no indicator lights or earpieces. Instead, the switching on and off of electricity caused a mechanical arm to rise and fall, marking lines on a strip of paper. The length and spacing of these lines indicated the received message!

This is a telegraph machine!

The signal emitted was also an original code designed by Li Xin himself, which was an improvement on Morse code.

The original Morse code, which used five digits to represent twenty-six letters, ten numbers, and other separators, was too cumbersome.

For Li Xin, the twenty-six letters were completely unnecessary. And now, it was impossible to encode every single Chinese character; it would be too cumbersome.

Therefore, according to Li Xin's design, ten numbers were created, along with separators, start characters, etc.

Each digit is also one less than the original Morse code, and is represented by four digits.

Then, use the corresponding four-digit numbers to represent different Chinese characters and form sentences.

This is the telegraph code table that Li Xin improved.

Although it's not fully completed yet to correspond to Chinese characters, these tasks are relatively simple.

After his initial elation at seeing the telegraph machine in front of him, Li Xin regained his composure.

The current design only transmits signals within a palace; the transmission distance is unknown.

Thinking it over, Li Xin summoned Bai Fenglai and the members of the Women's Guard Team, instructing them to take the receiver out and bring it to Yuxiu Palace on the northeast side of the Forbidden City, which was also the office of the Women's Guard Team.

The two palaces, several hundred meters apart, were successfully connected by electrical wires.

Li Xin then handed the telegraph code table to Bai Fenglan and the female guards, gave them a brief explanation, and then explained how to use the telegraph machine and receiver.

These female security guards are quite intelligent.

Soon, I understood.

Long-distance transmission tests were immediately launched.

In the side hall laboratory, Bai Fenglan prepared to do it herself.

Li Xin picked up a pen and casually wrote a string of random numbers on a piece of paper: "6321, 3324, 6828, 1324..." He then handed the paper to Bai Fenglan.

Bai Fenglan took the paper, looked at its contents, and then, relying on the telegraphic code corresponding to each number in her memory, began to press the buttons in her hand.

Drip drip drip, tick drip, tick tick...

A series of crisp electronic sounds rang out throughout the side hall, and the signal was transmitted outwards.

Inside the Yuxiu Palace in the northeastern part of the Forbidden City, several female guards watched as the robotic arm of the radio receiver rose and fell, and lines appeared on the paper.

After all the signals had been transmitted, the female guards began translating them according to the Morse code.

The translation was completed very quickly.

"Go quickly and show this to His Majesty to see if it's correct!"

A female security guard carried the paper and headed toward the side hall laboratory.

After arriving here, Bai Fenglan and the other person carefully checked the contents of the document.

Before long, everything had been completely checked.

"His Majesty,"

Bai Fenglan's eyes showed a hint of surprise as she said, "All correct! All these numbers were transmitted accurately!"

"That's amazing!"

The female security guard laughed and said, "I never imagined that electricity could be used not only for lighting but also for transmitting signals!"

"Hahaha,"

Li Xin couldn't help but laugh, saying, "There are many more things you haven't considered..."