June, the twelfth year of Yongle in the Ming Dynasty.

Zhu Gaochi did not quite agree with Zhang Xin's idea.

But Zhang Xin has been in good condition recently, so Zhu Gaochi agreed to wait a little longer.

During this period of waiting.

Zhu Gaochi felt that he could make better preparations for going out.

Zhu Di and Xu were both old, while Zhu Zhanji and Tang Sai'er were still young.

Zhu Gaochi was also afraid of his leaving because he would not be able to come back in time if something happened at home.

He certainly can't ride a horse.

Therefore, the means of transportation is very important.

For example, customizing a steam-powered vehicle that can travel a thousand miles a day.

The steam boiler that could be used on treasure ships could also be used on horse-drawn carriages for land travel, so there should be almost no difficulty in terms of technology.

It's just a matter of reducing the size of the steam boiler and moving the bearing connection from the impeller to the wheel.

Neither Zhu Gaochi nor Zhang Xin, even the person who made the steam boiler, had expected that making a steam boiler car would be several times more difficult than installing a steam boiler on a ship. So when everyone saw the latest steam boiler car, they were all shocked.

"What is this?"

Zhu Di was the first to express shock, and was deeply grateful that he had the foresight to not conduct the test run in the imperial city.

Otherwise, where would I put my old face?

"Your Majesty, this is a little ugly. For now, we can only make it like this. We can slowly improve it later."

Minister Shang’s face turned red.

This group of people never thought that it would be so difficult.

As for the system used on the treasure ship, the whole process went extremely smoothly and there were almost no insurmountable difficulties.

So when they heard that Zhu Gaochi wanted a steam-powered car, they all tried their best to create another glory.

As a result, we found many problems as soon as we started.

First of all, the size of the carriage is limited. The entire carriage is smaller than the smallest treasure ship. Therefore, there is no space to place a large steam boiler.

Secondly, the boiler needs to be equipped with coal for boiling water, a large amount of clean water, and personnel to serve the boiler.

Furthermore, the steam boiler makes a very loud noise. If it is integrated with the car body, the people in the car will have to endure the huge noise and smoke when adding charcoal.

The above three points determine that the size of this car must be larger than an ordinary horse-drawn carriage. In order to improve the comfort of the passengers, the boiler and the body must be separated and can only be made into two sections.

Minister Shang and the people from the Shenji Camp agreed on a preliminary plan and started working on it.

In order to have sufficient driving force, the size of the steam boiler is a huge water tank, with space for people to stand and for storing charcoal on the side. The whole thing is placed in the front, replacing the position of the horse and serving as the front end.

There is a single wheel under the steam boiler, which mainly serves to support the weight of the steam boiler.

At the back is the smallest royal carriage that can accommodate six to eight people.

With these two sections added together, the entire car is an astonishing twenty-one feet long and nearly seven feet high.

In addition, the possibility of failure has not been completely ruled out.

The horses should still be brought along as backup power.

Once the steamer truck comes out, the entire road will be filled to capacity.

The royal carriage is always majestic and elegant, and when paired with a fine horse, it looks beautiful no matter how you look at it.

But mixed with the steamer, it was so ugly that it was unbearable to look at.

"Isn't this ugly in the slightest?"

Even Xu, who came out to see new things and was the most receptive to new things, couldn't help but complain.

"So ugly that it's horrible?"

Zhang Xin was pulled out by Zhu Gaochi to join in the fun. He pulled Zhu Gaochi's sleeve and asked.

"Well, it's ugly and hurts the eyes."

Zhu Gaochi had never expected that after a month of hard work, he would come up with something like this.

It has a big head and light feet, and is extremely huge. If I have to describe it, it would be even more bizarre than a monster.

"Your Highness—"

Minister Shang’s voice sounded like he was about to cry.

"It's okay. My dad and my grandfather are mean-spirited. I think it's good. I don't lack anything."

Zhu Zhanji felt that Zhu Di and Zhu Gaochi had already made harsh comments, so he had to make up for it, so he stepped forward and patted Minister Shang on the shoulder.

"Yes, Your Highness, there really is nothing missing. It takes a lot of effort."

Minister Shang's eyes were filled with tears.

They were passionate about research, working day and night, even though the babies they gave birth to were a little ugly.

But he is my own child, I feel so sorry for him!

"I'm sorry to trouble you. You should look at more of the beautiful things our ancestors have made and improve your taste."

Zhu Gaochi didn't want to criticize him too harshly, so he just gave him some advice.

"Your Highness, I will definitely improve myself!"

Minister Shang nodded his head and said yes.

"Try?"

Zhu Gaochi looked at Zhu Di and made a proposal.

"try."

Despite all his complaints, Zhu Di was still very interested in new things and pulled Xu, who was also very interested, into the car.

As the water in the boiler boiled, the driver pulled the valve.

The whole steam engine started up with a rumble, just like a horse-drawn carriage. After a period of slow acceleration, it disappeared from everyone's sight in a short while.

Zhu Gaochi took Zhang Xin by the hand and settled them in the pavilion.

Zhu Zhanji also took Tang Sai'er to sit opposite them.

Several people drank tea and ate snacks, waiting for Zhu Di and Xu to come back.

After waiting for about an hour, the sound of horse hooves was heard outside the courtyard, followed by a burst of noise.

Zhu Di came in with a face as black as the bottom of a pot.

Xu couldn't help laughing.

Following behind him was Minister Shang, who looked like he was in mourning.

"Speechless!!! The car had to stop every quarter of an hour to add water. The car only traveled ten miles in an hour. Ten miles and it broke down!"

Halfway through his walk, Zhu Di turned back and roared at Minister Shang.

"Yes, Your Majesty, I deserve death!"

Minister Shang was sweating profusely.

"Tsk, tsk, tsk, you deserve to die at every turn!"

Zhu Di hated to hear this sentence the most.

"Yes, Your Majesty, I am guilty of this crime and deserve death."

Minister Shang had little contact with Zhu Di, and while he was shaking with fear, he weakly added the word "wan".

"..."

Zhu Di glanced at Minister Shang, then looked at Zhu Gaochi, pulled Xu and left.

Zhu Gaochi touched his nose and walked over to wipe his father's ass:

"Minister Shang, come and have a rest. My father is like that."

"Well, serve tea to Minister Shang."

As a junior, Zhu Zhanji also stepped forward to support the somewhat shaky Minister Shang, and helped him sit down before letting go and asking for tea.

"It's okay. We can slowly improve the shortcomings. In the past, the sugar making process at Baotangfang was similar to this steamer."

Although Zhang Xin couldn't see, he knew from Zhu Gaochi's description and Zhu Di's words that the first version of the steam car was not satisfactory, so he spoke to comfort him.

"Yes, thank you for your comfort, Your Highness."

Minister Shang did not dare to take his seat. He stood up and bowed in return for every request. It was Zhang Xin's turn when he spoke first.

"It's not a relief, it's a good job. It's always difficult at the beginning when something has never happened before."

Zhang Xin smiled and answered again.

"Thank you for the compliment, Your Highness."

Minister Shang stood up and replied before he even sat down.

"Hahaha, mother, please leave some food for me. I will accompany Minister Shang."

Zhu Zhanji smiled and pulled Minister Shang to sit down and made a suggestion.

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