Tracks were invented before trains came out.

As early as the pre-Qin period, the Chidao appeared. The so-called "all vehicles on the same track" means this.

However, the trajectory of later generations is upward, while the trajectory of the pre-Qin period is downward.

Animal-powered tracks, as the name suggests, use horses as the power source to pull the carriages.

"For now, don't think about rails. The current output of refined iron in the Ming Dynasty is insufficient, so we can only make wooden rails first. We can replace them when the output of iron increases in the future."

Zhu Ying thought somewhat helplessly that building railway tracks was simply not feasible for the current Ming Dynasty, but making wooden cabinets would definitely not be a problem.

"If we have wooden tracks, the speed of transporting the capital of the Ming Dynasty to other places will be greatly improved, especially for the transportation of logistics and soldiers. It will feel like the trains of later generations."

"The most important thing is that the soldiers can maintain sufficient physical strength when they enter the vicinity of the battlefield and can immediately engage in battle. At least within the territory of the Ming Dynasty, they can be quickly mobilized and transferred."

"Logistics can also keep up at all times, and there won't be too much loss on the road."

Zhu Ying's eyes began to brighten. Once the animal-powered track was built, it would be like telling the entire Ming Dynasty to start running.

The benefits are so numerous that they are hard to imagine.

There is a saying in later generations: If you want to be rich, build roads first.

Once the track is completed, the troops and supplies from the capital can reach the border directly in a very short time, and the blow to the enemy will be beyond imagination.

This is just the military aspect, there is also food transportation and post station documents.

It would be equivalent to building a railway line in the Ming Dynasty today, which would be an earth-shaking change.

Thinking of this, Zhu Ying could no longer contain his excitement.

He stood up and walked towards the door.

"Where is grandpa now? I have something important to discuss with you immediately." Zhu Ying asked the eunuch Guo Zhong who was waiting outside the door.

"Reporting to Your Highness, His Majesty should be reviewing memorials in the Huagai Palace at this moment."

"Lead the way ahead."

"I obey your order."

…

"It is indeed comfortable to have our eldest grandson in the palace. Otherwise, how could we eat such delicious food every day."

In the Huagai Hall, Zhu Yuanzhang was enjoying his dinner. Now, Zhu Yuanzhang's meals were all brought to the chef by Zhu Ying.

Each of Zhu Ying's chefs was carefully trained and brought with him. It's not that there is no delicious food in the Ming Dynasty, but the use of many seasonings can only be understood by those who use them frequently.

Zhu Yuanzhang had not revealed his identity earlier, so it was not easy for him to directly ask his eldest grandson for the person.

Even if it is just to add some seasoning, it requires constant experimentation, and then you will understand each other.

But Zhu Yuanzhang was too embarrassed to speak.

After all, Zhu Yuanzhang was a grandfather and an emperor who ruled the world, but he had to ask his eldest grandson for a cook. He really couldn't bring himself to do this.

But now that the eldest grandson has entered the palace, it is only natural that the cook has followed him in.

"Liu, tell me, how can our eldest grandson be so capable? It seems that there is nothing we can teach him in any aspect. This makes me feel bad."

Zhu Yuanzhang was eating with a helpless look on his face, and said to Liu He who was serving him.

At this time, Zhu Yuanzhang felt that it was not a good thing for his eldest grandson to be too outstanding, which made Zhu Yuanzhang lose a lot of sense of accomplishment.

A grandson who was eight years old went out and when he came back, he was so outstanding that even the royal family could not cultivate him.

Some fantastic ideas may not be thought of even if one seeks guidance from the most famous teacher at the time.

In the end, it can only be the eldest grandson who is destined by heaven.

Those who survive a great disaster will surely have good fortune in the future. He survived the disaster at the age of eight and grew up to be a grandson, and then he soared into the sky.

"Your Highness Changsun is your Majesty's bloodline, and has inherited the excellence of your Majesty, the Queen, and the Crown Prince. He is also blessed by God. This old servant thinks that it makes sense."

Liu He said respectfully, and this time he did not follow the words of His Majesty. Instead, he hinted that Zhu Ying's excellence came from inheritance.

Hearing this, Zhu Yuanzhang said with a smile: "Now that you put it this way, I think there is some truth in it. The temperament and appearance of our eldest grandson are like his grandmother and father."

"But his personality is indeed very similar to mine. He looks lazy at ordinary times, but when he gets things done, he never lets me down."

Zhu Yuanzhang was quite happy and said that ever since his eldest grandson started reviewing memorials, he found that he had never been slack.

Even though it was so hard to train with the soldiers in the military camp, the memorials he reviewed were always submitted on time.

Judging from the comments made by the eldest grandson on the memorials, they were very complete in many aspects, and he even gave specific implementation plans for the memorials submitted by his ministers.

The details can be seen.

Just when Zhu Yuanzhang was about to say a few more words, the young eunuch outside came over to report.

"His Royal Highness Chang Sun requests to see you."

Zhu Yuanzhang frowned slightly when he heard this, and ordered: "When our eldest grandson sees us in the future, he doesn't need to report to us, just come directly."

"I obey your order."

Zhu Ying came in and saw the old man having a meal. He sat down next to him without any hesitation, grabbed a roujiamo and started eating.

Zhu Yuanzhang felt very happy to see his eldest grandson being so "impolite".

He couldn't remember how long it had been since he had been this close.

No matter who it was, even the old boss Zhu Biao was always respectful to him and abided by the royal etiquette.

The only person who was close enough to him to ignore his status as emperor was Empress Ma.

The eldest grandson is different. If he grew up in the palace, there would be no need to say more. But the eldest grandson grew up outside, which is completely different.

At first, Zhu Yuanzhang was worried that his eldest grandson would not be able to adapt or would feel restrained.

Finally, through observation, it was discovered that the eldest grandson treated this place just like his own home. Even when he first entered the palace, apart from being curious about some of the buildings, everything else was normal.

"Grandpa, I came here this time because I have something important to discuss with you." After eating a few bites and feeling that there was something in his stomach, Zhu Ying did not hesitate and spoke directly.

"Big deal?" Zhu Yuanzhang was a little surprised.

This was the first time that the eldest grandson said that there was an important matter to negotiate. Before this, other strategies, each of which could affect the foundation of the Ming Dynasty, had a sense of understatement when heard from the eldest grandson's mouth.

Zhu Ying nodded slightly, and then began to talk about the track and production.

In a sense, the track is not much different from the current Ming Dynasty post station system, but the process of track production is not as simple as a sentence.

The difficulty of laying rail tracks within the Ming Dynasty is almost the same as that of Qin Shihuang building the Great Wall.