(Sorry, the chapter number of the previous chapter is wrong, and the chapter name can't be modified, but the rest is fine, and it doesn't affect the reading.) ）

Shenyuan five years, spring, on the edict of all the people gathered in Chang'an station, 100 meters long, three meters wide, do not make animal power, can carry 10,000 stones day and night gallop, all the people take the same train, from the beginning of Chang'an, two hours and three minutes to Tongguan, the same car, the sunset returns to Chang'an, all the people sigh!

The matter of convening all the people to experience the train was carried out a month later, and this experience naturally included the participation of historians.

These historians shared the same train with the common people, experienced the benefits of the train firsthand, and recorded this exciting moment at the same time.

It's a pity that there is no video record at this time, so I can only use these dry words to record.

And there is a problem with the historian's record of historical materials, he does not write in detail like that, and the content they record is mostly a summary of one thing.

However, this passage has left several strong historical evidences for later generations.

First, as early as the fifth year of the Shenyuan Dynasty, the length unit of rice has been thoroughly promoted, and many historians believe that this point in time may be earlier, because this is the inevitability of history, and the promotion of a standard must go through a long period of testing and demonstration, so before that, it will inevitably be used internally for a period of time before promoting.

But the earliest record of the appearance of the unit of rice is the fifth year of Shenyuan, this record about the train.

In addition to this, this passage also confirms that the train can carry goods weighing ten thousand stones and can gallop day and night, and the other is his speed.

Two hours and three quarters, from Chang'an to Tongguan, two hours and three quarters, that is, five and a half hours, Chang'an to Tongguan, the straight-line distance is about 120 kilometers, the actual route distance is one hundred and fifty-two kilometers, that is, less than 30 kilometers per hour.

This kind of speed is turtle speed in later generations, but in this era, it can definitely be called god speed.

If you compare it, you will find that when the army marches, the daily distance is 60 miles, that is, 30 miles, under normal circumstances, and the train only takes a little more than an hour to complete this section.

If you convert it to a day, a night and a night, the train can run a distance of almost 300 kilometers, or that sentence, in ancient times, this is an incredible speed.

There is no way to surpass the speed of a train except for an 800-mile expedited, but an 800-mile expedited service requires countless people and manas on the way, and the energy expended is also innumerable.

But anyway, the appearance of the train has made many people feel a little puzzled.

Because later historians found that the Tang Dynasty was the first train, and then it was transformed towards industrialization on a large scale, which is difficult for them to understand, and even some do not conform to the laws of historical development.

But these are all issues that people will have to worry about in the future.

Now, under the protection of a large number of forbidden troops, Li Yuanji has come to Chang'an Station.

Chang'an station has begun trial operation, but at this time it has not been put into civilian use, at this stage, the railway is running, mainly military, that is, all kinds of military materials are transported to various camps by rail.

One is to test the feasibility and efficiency of this approach, and the other is to test the railway.

The effect is indeed much better than before, but to be honest, the improvement of efficiency is really limited.

In this regard, Li Yuanji also knows that the theoretical speed of the train will be greatly affected on the railway, not to mention the train pulled by horses.

And this time the test is not only the old men who have been recruited, but also another group of people in addition to a certain number of forbidden soldiers.

That's the cadets with red epaulettes on their shoulders.

The number is about a hundred, and naturally those who pass the exam are local students.

After half a year of military academy career, these student soldiers have basically undergone a metamorphosis and are going farther and farther on the road of soldiers.

And these 100 student soldiers were arranged separately in a carriage, the carriage was open-air, very simple, fortunately, the weather has warmed up, and sitting on the flatbed car at this time, it will not feel too cold.

Only the five cadet soldiers with the best grades were eligible to ride in the same car with Li Yuanji.

Of course, there are a few old men with a higher reputation, and a few ministers who can spare time.

"Your Majesty, after a period of actual measurement, it can be basically determined that the average time to arrive in Luozhou from Chang'an is about one day and two hours. And the biggest impact on time, is the load of the train, the lighter the load of the car, the faster the speed of the train, the fastest test speed for the empty car, a single trip down only takes less than eight hours, and the load test is up to 20 cars, in addition to a coal-fired car and a water car, the other 18 cars have a maximum load of 11,000 stones, the most one time takes a day and seven hours, the main reason is that there are some small faults in the train on the way...... "Lao Xu continued to report the test results during this time.

The test naturally simulates the operation in various situations, with empty vehicles and loaded goods, so the results will naturally not be the same.

In addition, the latest carriage has not yet been manufactured, so the current use is still the previous five-meter version.

Even so, it is still acceptable to control the one-way time to one day and two hours, and even that this result is already very good, which is enough to exceed Li Yuanji's expectations.

"Although the test has been a great success, you still can't relax, try to find as many problems as possible, and then solve it, so as to avoid all kinds of problems in the process of using it and affect the overall situation." Li Yuanji nodded, expressing his approval, and at the same time, he told them not to relax.

Today's Li Yuanji can be said to be in high spirits, the military victory is complete, the development of the country is so smooth, the important thing is that the construction of the science and technology tree is also very fast, although there have been all kinds of problems, but within three years, still came up with such a high-tech thing as a train.

Although the interior of the entire front of the car is very simple, it can even be described as rough, and it also includes the arrangement of some parts that are somewhat unreasonable, and the interior space is not enough to use.

But it always takes time to work out, doesn't it?

From scratch, from agriculture to industrialization, Li Yuanji only took five years, and even if the preparation period is added, it is only eight years.

Eight years, a long time, but also a short time, for a country to be able to do this in eight years, it's incredible.

"The appearance of the train, whether it is for the court, for the people, or for the military, this is a great thing." Li Yuanji continued, and this passage was addressed to everyone.

The best way to accept a new thing is to let them see the benefits that the new thing can bring to themselves.

The court and the army themselves are not worried, mainly the people.

The situation of the people chasing after the wind and shadows is much more serious than that of the imperial court, and some things have to be explained, even more delicately.

"For the imperial court, the train can carry more goods in the same time, at the same time, because a lot of manpower is saved, so the transportation cost will drop several times, in addition, because of the large capacity, the cost is small, so all kinds of raw materials can also be transported by rail, the combination of the two, the final result is the cost of goods decreased, which directly brings, the price of goods dropped.

This is what the people want to see the most, the price is low, the money in the hand is valuable, you can buy more things, in addition, if you want to go far in the future, you don't have to worry about what dangers will be encountered on the way, just a ticket, just one or two days, or ten days, you can arrive at any piece of land in Datang.

And with the railway, families can also take the train to the frontier and travel to various places to visit their relatives in the barracks, which is very convenient and safe. In the future, the imperial court will also build a special carriage, which cannot be blown by the wind or sun, and can even lie down to sleep.

As for military ......" Li Yuanji glanced at the five cadets, and Xue Rengui, who he cared about very much, was in the ranks, with a slight smile on the corner of his mouth, and said: "You guys think about it yourself, and when you go back, you will each write a report and come out, and I will personally inspect it." ”

"Students obey!" The five students nodded with a look of surprise and agreed, in fact, it was the first time they had seen the train, and the shock in their hearts was not much less than that of those people.

In particular, the stability of the train when traveling, whether it is smooth or fast, is much beyond their cognition, although there are some ideas in their minds.

Even before this, Li Yuanji had already said all kinds of benefits, but Xue Rengui knew very well that what Li Yuanji said before was actually not what he wanted.

And this question is a test for them, but also an opportunity.

"Your Majesty, the old man has lived this life, and I never thought that the Tang Dynasty would have such a grand occasion today, hey, I only hate the old man who was born decades early, otherwise I can see a more powerful Datang......" The old man who spoke was named Wang Ping, not the Wang family, but he was particularly famous in Huazhou, he was a teacher in his early years, and he also helped Li Yuan win Guanzhong in the late Sui Dynasty, although he was not the one who contributed the most, but for the stability of Huazhou, Wang Ping contributed a lot, He also saved the lives of thousands of people in a village in Huazhou.

Such a meritorious old man, plus he is particularly famous in the whole of Huazhou, so Wang Ping naturally got the qualification to ride in the same car with Li Yuanji.

Just looking at all this in front of me, feeling the stability under my feet, except for the cool breeze that kept blowing, I didn't even feel that I was moving.

"Birth, old age, sickness and death, human nature, there are some things I can't do, but please rest assured, the days will get better and better in the future!" It is very inappropriate to talk about life and death in front of the old man, but Li Yuanji has to talk about this topic.

Wang Ping's heart was also a little displeased, but the other party was the emperor, and he couldn't show dissatisfaction.

However, Li Yuanji continued: "There is not much I can do, the only thing I can do is to recruit famous doctors in the world, teach more students, study more advanced medical skills, and overcome as many incurable diseases as possible. ”