Great Tang princess

June [-]th, dusk.

The orange-red glow covered the Eastern Capital City, and in the eyes of the common people, the huge airship painted with sharks landed slowly on the Xuanwumen Square.

Standing on the city wall, Li Xian and his wife watched the hatch open and their son came out with smiles on their faces.

However, Li Chongrun's words stunned the two of them: "Grandfather, hurry up and announce the people from the medical school into the palace, Yaoyao may be pregnant!"

Hearing these words, Li Xian and Wei Lian'er looked at each other, and they both saw a look of excitement in each other's eyes, they were going to hug their grandson!

Then he waved to Sun Jingbang: "Go!"

The Crown Princess was pregnant, Sun Jingbang didn't dare to delay such an important event, and quickly sent someone to notify the medical school.

At the same time, I felt a little troubled in my heart. If the medical school could be closer to the palace, there would be no need to send someone to notify, and a phone call would be enough.

……

At the same time, Li Yuechen was testing the electron tube just made in front of them with them in the Engineering Academy.

Of course, there is a problem with this name, and it can't even be called a real electron tube. To be precise, it is just a simple electronic signal amplifier.

After more than half a month of hard work, with the help of a vacuum pump, this transparent fist-sized thing was finally made.

If you have the first one, you are not afraid of not having the next one. Today is the day to test it.

Two separate wired telephones were tested. For the first test, the wire length reached ten kilometers.

On the Engineering Academy side, everyone gathered around the phone, waiting for the ring to ring.

When the bell rang, Pei Bishu quickly answered the phone: "Your Highness!"

"Well, very good, I can hear you clearly!" Li Yuechen's voice also came from the receiver.

The improvement this time is not only the length of the telephone line, but also the microphone.

Although the radio effect is still not very good, at least I don't have to shout like before.

Pei Bishu turned his head, looked at the expectant crowd behind, and said slowly, "It's done!"

"Alas--"

Cheers erupted from the crowd, and many craftsmen in the front row clapped each other's hands and kept shouting.

The young apprentices were even crazier, shouting to the sky non-stop: "It's done! It's done!"

The huge cheers made Li Yuechen on the opposite side couldn't help but move the microphone away a lot. After digging out his ears, he continued: "Okay, the ten-kilometer test is fine, continue the test!"

"Yes!"

After testing back and forth many times, I finally came to the conclusion that the farthest call distance of this kind of phone using electronic tubes can reach [-] kilometers!
This is to ensure that the call is clear. If it exceeds [-] kilometers, the call will become intermittent.

In this way, the communication distance of the phone will be greatly increased, and even the palace can be directly connected to the medical school.

In other words, within the Eastern Capital City, including some places outside the city, you can talk freely without any hindrance!
In this way, a telephone can even be installed in the Qianniuwei barracks, so that the emperor can directly contact the army.

In other words, if a rebellion occurs one day later, the emperor can directly contact the army to rescue him in the palace, which is equivalent to an extra layer of insurance.

So far, the experiment has been truly successful!

When Li Yuechen drove back to the engineering institute, the craftsmen applauded spontaneously.

The applause completely submerged Li Yuechen like ocean waves, from which one could feel the admiration and worship of the craftsmen.

However, Li Yuechen just smiled and waved his hands to make them stop applauding, and then said: "The success of this phone call is not only due to the efforts of one person in this palace, but also has the inseparable credit from all of you! I sincerely hope that in the future I can continue to work with you, keep moving forward, and create greater glories!"

"We will follow His Highness to the death!!!" The craftsmen present replied in unison.

……

After leaving the Academy of Engineering, Li Yuechen drove to Xuanwu Gate, intending to enter the palace to tell his brother the good news.

However, when they came to Jixian Temple, they found that Li Xian and Wei Lian'er were talking to Lu Yao.

"During this time, don't be too busy and take care of your health." Li Xian held the health ball with a dignified look on his face.

"That's right. There's no need to go to the hidden guard for now..." Wei Lian'er also chimed in.

Lu Yao's expression was somewhat embarrassed, and she quickly nodded in agreement.Li Chongrun sat alone and drank tea with a smirk.

"What happened?" Li Yuechen asked.

"Well, why is Yuechen here?" Li Xian turned his head.

"There are new developments at the Engineering Institute, and I plan to come and talk to my brother, but it seems that there is something going on here too?"

Li Xian smiled: "Just now I called Liu Shenwei to come for a checkup. The Crown Princess is pregnant. Congratulations!"

"Oh? That's a good thing! It's worth celebrating!" Li Yuechen came to Li Chongrun with a smile, and slapped him on the shoulder: "You are going to be a father."

"Hey, yes!"

Li Chongrun replied with a silly smile: "I'm going to have a child..."

It seemed that he hadn't recovered from the surprise, Li Yuechen shook his head with a smile, and didn't say much.

In any case, the coming of a little life is indeed something worth celebrating. Li Xian immediately announced that he would keep his sister for dinner tonight.

Originally, he wanted to entertain the officials, but Li Yuechen stopped him.

"Okay, I just got pregnant, why worry? Let's talk about it after I'm born."

Then he said to Lu Yao: "Listen well, before the baby is born, you must not drink alcohol! Also, stay away from those who smoke!"

"Yes, rest assured, Your Highness!" Lu Yao quickly agreed.

"Speaking of which, you don't have many servants in your Eastern Palace, right? How about..."

Li Xian was going to find a way to get a few people to serve the pregnant woman.

"Okay, pregnant women can't sit still all day, just live according to the usual habits!" Li Yuechen told them not to make a fuss too much.

For this younger sister's words, Li Xian believed unconditionally, so he didn't continue to insist.

But I couldn't wait to call my mother to tell the news.

And Wu Zetian just responded flatly, without any other emotions.

In fact, it is also understandable that she didn't have any special feelings for grandchildren, let alone great-grandchildren.

The law of intergenerational parenting does not seem to be so obvious in the mother, of course, it may also be related to her own personality and the environment in which she lives.

……

During dinner, Li Yuechen told his elder brother about the latest experimental results of the Academy of Engineering.

Although Li Xian was surprised, he seemed to be gradually getting used to it. He just felt that the longer the call distance would make his life more convenient in the future.

Then, under Li Yuechen's suggestion, the construction was agreed.

Of course, this construction is not simple. In order to maintain the greatest degree of secrecy, prisoners were not used, but active-duty engineers were used to do it.

At the same time, during construction in the city, both sides must be covered with wooden boards, and the road must be closed.

Fortunately, the streets in the Eastern Capital extend in all directions, so it is not a big problem to seal one or two roads.

However, the construction period is not short. When the new telephone line is laid, the time has come to October.

Since October, a large number of hang gliders take off and land in Dongdu every day, and there are also a large number of carriages coming in and out.

This is the beginning of the autumn harvest reports from all over the country, as well as tax collection, transportation and so on.

In the south and northeast regions, they were sent directly by airship.

The household department has entered the annual busy period, calculating the harvest and taxes of various places.

The good news is that this year's tax revenue has once again hit a record high.

Because of the improvement of the commercial law, the collection of commercial tax has also been clarified, and the taxes paid by major family businesses have increased a lot this year.

For the convenience of tax payment, it is better to exchange it with Datang Jinyuan banknotes to pay taxes.

According to what Princess Xuancheng saw with her own eyes, many people gritted their teeth when paying taxes in the household department.

……

In mid-October, in the newly built driving school, more than a dozen trucks and eight off-road vehicles were parked steadily in the middle of the square.

A hundred or so young people lined up in a square, standing straight in the middle.

There are 73 men and 27 women. These people are all drawn from various military regions. They have relatively flexible minds and good physical and psychological qualities.

In front of them was Li Yuechen in a bright red round collar robe.

Seeing this legendary princess, the young soldiers felt a little excited and looked at her uncontrollably.

Nowadays, many soldiers in the military region have seen her photos, so they are naturally more excited when they see the real person this time.

As in the photo, tall, tall, waterfall-like hair, heroic temperament...more real than the photo.

"From now on, you, as drivers, will participate in training here and learn to drive these big guys behind me!"

Li Yuechen raised his hand and pointed at the car behind him with his thumb: "As a driver, it is a very difficult position to transport military supplies and soldiers... Do you have confidence?!"

"Yes!!!" The soldiers shouted in unison.

"Very good, very energetic!" Li Yuechen nodded, "The dormitories are all allocated, and we will be disbanded again today, and we will officially start tomorrow!"

Because he didn't want to waste too much time here, Li Yuechen planned to give them a closed training session for [-] days.

They must be trained to be qualified drivers within [-] days!
The plan is very simple. The first 30 days are theory plus practice classes, and the next 30 days are all practice plus exams.

At the same time, the printing factory is already stepping up the production of the driver's license, and directly used the camera, and there must be a photo on it.

So the driver's license in this era will be relatively large, but it doesn't matter, it's all for the army anyway, so don't care so much.

……

The next day, the soldiers got up to the sound of drums, ran ten kilometers of morning exercises, cleaned up, and then went to eat.

After breakfast, the class officially started.

In order to accommodate these 100 people, the classroom of the driving school is modeled on the stepped semicircular classroom of the future university.

Li Yuechen stood in front of the blackboard and explained the content to them.

"The engine is the core of a car's operation. The specific principle is to transmit the kinetic energy of the engine to the rear wheels through the gears to drive the truck forward... In addition, off-road vehicles are four-wheel drive..."

"The faster the speed, the smaller the turning range of the steering wheel must be, otherwise there is a risk of overturning..."

"It's not a particularly big curve, try to cut through it, and if it's too big, you need to learn to drift... As for what drift is, I will demonstrate it to you personally in the practical textbook..."

While Li Yuechen was lecturing, the soldiers were also carefully taking notes below.

This group of soldiers are all carefully selected, each of them can write and count, which is also an indispensable ability to become a driver.

After all, what they have to learn is not only driving itself, changing tires and simple fault repairs, etc., are what they have to learn.

……

One month passed quickly. After the theoretical and practical classes, subject two has been completed, and the next month is practical.

In the driving school in early November, thirteen trucks lined up and were driving on the road marked out in the square.

Li Yuechen stood on the square and watched their driving with a simple brass horn.

He suddenly raised his horn and shouted to the soldiers driving: "Okay, now the right rear tire of car No. [-] has blown out! Replace it immediately!"

The drivers stopped immediately, and several soldiers leaned over and climbed into the bottom of the car with the jack that the Academy of Engineering had just completed a few months ago.

With the jack in place, the soldiers relayed back and forth, turning the inserted lever to jack up the right rear wheel of the car.

The soldiers next to him had already started to loosen the screws, then quickly took off the tires, replaced them with new ones, and then tightened them.

The soldiers at the bottom of the car put down the jacks, then returned to their positions, and the convoy continued driving.

Looking at this group of young soldiers who moved neatly, Li Yuechen showed a gratified smile.

After two months of closed high-intensity training, their growth rate is very fast.

At the same time, I couldn't help thinking that now the engineering institute has started experimenting with light bulbs. After the experiment is successful, the car lights can be arranged.

The only problem is that tungsten is too troublesome to make, and its melting point is too high.

Although it is said that it is already entering the experiment, it is not so simple to melt it even in the blast furnace of the Engineering Academy.

That's right, today's cars don't have headlights, so driving at night is very dangerous.

And the horn is still similar to bagpipes, which is still very different from future cars.

But in any case, at least the capacity has been improved, and it is many times stronger than the horse.

On the 26th of the twelfth lunar month, it stands to reason that there should be some stewed meat, but this matter has nothing to do with the driving school. Today is the day when the driver's license is issued.

One hundred trainees, wearing clean camouflage uniforms, lined up on the square to receive their driver's licenses.

The driver's license is a flat wooden box. After opening it, the photo on the right is placed in the glass frame.On the left is the name and military rank.

The following is a line of words: After the motor vehicle driver skills training of the logistics headquarters, the test results are passed, and the graduates are allowed to graduate. This certificate is hereby issued!

And there is the seal of the logistics headquarters on it.

The new drivers excitedly waited for the roll call, then stepped forward to take the certificate from Li Xian, and saluted him and Li Yuechen beside him excitedly.

From today onwards, they are the drivers of the army, and they will drive big guys that are incomprehensible to the outside world, across the battlefield!