"Father-in-law, please rest assured, the train is actually not big, the width is only about one zhang, but it is relatively long, it is connected by multiple carriages, and the length of each carriage is about one and a half zhang to two zhang."

"And in the carriage, there is only one aisle, and the rest is the seat, so it can accommodate a lot of people."

Zhao Yin had to explain to Li Er carefully, although he let go, this matter is up to him, but there is no holy decree, and he expects the treasury to pay for money, which is undoubtedly a fool's dream.

After his explanation, Li Er was finally able to think of the general appearance of the train, but he still couldn't believe that relying on the steam of boiling water, it would have such a great power?

"Father-in-law, the main purpose of my son-in-law's visit this time is to discuss with you, the train has been successful in theory, but this kind of car has a demand for the road, which is in demand, ordinary roads, and cement roads, can not be exercised, it needs a special road to be able to operate normally."

"That's the only way it can reach an incredible speed."

Zhao Yin said, his hands were still rubbing, obviously asking for money from this old man.

"How much does it cost to build this purpose-built road?"

Seeing this kid's expression, Li Er knew that he was planning to ask him for money.

However, if this train is really developed, it must be an artifact for the benefit of the country and the people.

"Ahem......! Father-in-law, it depends on where and how far you plan to build the railroad to know the exact price. ”

Zhao Yin said with a little weakness.

In fact, there is no need to calculate, if the entire Datang is built on the railway, then the little silver in the treasury is definitely just a drop in the bucket.

"What? Railway? Don't you kid tell me that this road is going to be made of steel? ”

After hearing Zhao Yin's words, Li Er almost jumped up on the dragon chair.

If it were another person to say this, Li Er would definitely pull him out and cut him without hesitation.

I've seen a loser, but I've never seen such a loser, and I actually want to use iron to pave the way?

"Father-in-law, did you misunderstand something? Although it is called a railway, this road is not all made of steel, but it requires two parallel rails! ”

Zhao Yin hurriedly opened his mouth to explain, if he didn't hurry up and make his words clear, I am afraid that this old man would directly reject him.

The reason why the railways in later generations will lose money is entirely because of poor management, but it is different in the Tang Dynasty, as long as the people understand the advantages of the train, it is difficult to lose.

"Father-in-law, please look!"

Zhao Yin hurriedly laid out the map that had been prepared on the table, he didn't go out these days, he just sketched this map at home.

Moreover, he connected several prosperous cities closest to Datang, and walked on a route that avoided the crop fields as much as possible.

As long as these places are temporarily opened, the carriage originally had to travel for more than ten days, but now the train can run one round trip a day.

"If the carriage is here, it will take about half a month to come and go here, and once the train is opened, it will only take a day to come and go, so it can also directly promote the economic development of my Datang......

Zhao Yin stretched out his hand and pointed to the place he marked with his pen, and quickly explained, "These are just the routes I have sketched out temporarily, and our steam engine and train have not yet been developed, so I only plan to build a few miles of railway, and when the train research is successful, we can try it directly, so as not to run without a railway when we get it!" ”

"That's right, you kid have to move quickly, I'll let Dai Xuan assist you!"

It shouldn't cost too much money to build a few miles of road, you have to give it up first, and then you can get it in the end, Li Er sees this very clearly.

"Yes!"

Zhao Yin hurriedly surrendered his order, and after abusing such a tongue, he finally achieved his goal.

……

"Master Pony, why do you have time to come here today?"

Hubu Shangshu Dai Xuan looked at Zhao Yin with a puzzled expression.

This kid is definitely a rare guest, and he also has nothing to do in the Three Treasures Palace, and he actually took the initiative to come here today, presumably there must be something important.

"This horse needs some land, about ten miles long and one zhang wide, in order not to affect the people's farming, this horse has already marked the location!"

Zhao Yin carefully pointed out the route he wanted on the map to Dai Xuan to see, anyway, he had a holy purpose, and he was not afraid that this guy would not agree.

"What's the use of such land?"

Dai Xuan's eyes were straight, and he couldn't have imagined that the pony had come to him just to get a place where the birds wouldn't.

"Build a railway!"

Zhao Yin said directly.

There is nothing to hide about this, and it will not be long before it is estimated that the matter of the railway will spread throughout Datang.

"Huh?"

Dai Xuan almost didn't bite his tongue, because of the production of weapons and artillery, the iron ore in the entire Tang Dynasty was in short supply.

What does this kid say now?

To build a railway?

Isn't that a joke on him?

looked at Zhao Yin carefully again.

"Any questions?"

Zhao Yin looked at him very puzzled.

Isn't it just about building a railway? As for being so surprised?

"Horse, although Datang has just won a battle now, it shouldn't be such a waste!"

Dai Xuan had a bitter face and persuaded him.

Datang has just built a lot of cement roads, which cost a lot, and if the railway is built at this time, won't it cause a great burden on the national treasury?

"Once the railway is opened, do you know how big the transportation problem will be solved?"

Zhao Yin had to explain to him the purpose of the railway.

"Yes...... The effect of the concrete road is already very good, why add snakes? ”

Dai Xuan was still very puzzled.

The benefits of cement roads are becoming increasingly apparent, which has greatly improved the smooth travel of the people of Chang'an.

"Your Majesty has agreed, if you don't understand something, you can ask Your Majesty."

Too lazy to talk nonsense with him, Zhao Yin directly handed over the holy decree.

"It's ......!"

Dai Xuan almost choked to death.

Your Majesty already knows about feelings?

Still messing around with the horses?

If you don't approve it to him, you will be resisting the decree, and in the end you can only sigh, do business, what do you love!

When everything was ready, Zhao Yin personally led people to a vacant lot outside Chang'an City and began to point out the laying of the railway.

In the prison, the research on the steam engine is also in full swing.

Trains are one of the modern means of human transportation, which are divided into two types: carrying passengers and carrying goods.

The original railroad was made of pig iron to transport ore, and then gradually changed to rigid rails over time, because pig iron was too easy to corrode and consumed a lot.

Datang's resources are still relatively rich, but the exploration technology is extremely backward, so it is very difficult to find various minerals.

Occasionally, some ore is found because of landslides or accidentally discovered, and then it is slowly developed.

As for the quality of steel in this period, there is no need to worry, because of the existence of Zhao Yin's golden finger, he can point out the shortcomings anywhere.

Because the main purpose of the construction of the railway this time was for future experiments, only ten miles were built.

At the beginning, Zhao Yin was still very uneasy, and he would find time to watch it every day, but as time went by, he found that it was really redundant for him to do so.