After reading these things, Huo Gang thought about it, and simply didn't take it to heart, if he wanted to come, let them come, anyway, Li Chengqian is the successor of the next Tang Dynasty, if you learn from Huo Gang here, there is actually a benefit.

That is the thinking of the three of them, Huo Gang will inevitably have a certain influence on them, and they are not required to have the same goals as Huo Gang, as long as they can broaden their horizons, then Huo Gang believes that the probability of these small countries around Datang being able to exist will not be too great.

In later generations, if you make enemies indiscriminately, you may be attacked by a group, but in this era, in fact, there is no need to worry about this, fighting wars in ancient times is fundamentally different from later generations, those small countries around them have no capital to fight at all, and only a very few countries can gather troops.

If Li Chengqian is given the method of attacking their hearts, in fact, the resistance of the other party's army is not strong at all, and the lives of ordinary people in Datang are not very good, not to mention these small countries around, as long as they are targeted, targeting the ordinary people of these small countries, tell them that the army of Datang is here to liberate them...... Belch......

Tell these people how their nobles exploited them, and then explain the policies of the Tang Dynasty, it doesn't have to be too good, as long as they are better than them, these ordinary people are very likely to turn against the water, and then the army composed of ordinary people will not have much confidence in resistance.

Similarly, the Eastern Turks have been almost wiped out, and the remaining large nomadic tribes such as Murwei have a miserable life and no sense of belonging to the tribe.

These are all good things, compared to these things, Huo Gang has more important things to deal with next, Yang Wu has already sent news from the Industrial City, the most important in the Industrial City, the third heavy machinery manufacturer in Dahan has developed a steam train, and even has laid a considerable length of tracks, which will be tested soon.

For this news, Huo Gang was also shocked, he must pass this matter, the train can be said to have too much influence on the world, the emergence of the train means that a country's control of the land area, means that a country can call, the area under control has increased sharply, and the resource regulation of the entire country has also increased sharply.

Although it was only the most basic steam train, and Huo Gang only gave the most basic creative reminder from beginning to end, Huo Gang didn't give any advice at all, not that Huo Gang didn't want to give it, but ...... To be honest, he didn't know much about steam trains.

His current understanding of the steam engine is definitely not as good as that of craftsmen like Lu Feng and Sun Er, they have already thoroughly studied it, not to mention, since the birth of the steam engine for more than half a year now, just the data that Yang Wu reported to Huo Gang before, they have improved at least more than a hundred models!

Here we have to say again how correct Huo Gang is after he came up with the concept of hydraulics, otherwise, simply using rivets and workers to build the parts of those steam engines is definitely not as fast and efficient as the current method of using hydraulics and die forging manufacturing.

The advent of hydraulics made the first forged steam engine parts more efficient than the steam engines developed in normal history, at least much stronger in terms of sealing, etc., and the enhanced steam engines in turn strengthened the hydraulic aspects, making die forging and hydraulic free forging more efficient.

In addition, the steel made by the open-hearth steelmaking method also increased the bargaining chip for the rapid development of the steam engine.

You must know that in history, the open-hearth steelmaking method appeared more than 30 years later than the first train, and the early appearance of special components such as steel sealing rings also brought many favorable results to the development of steam engines.

These achievements are small alone, and he can give opinions on some achievements that Huo Gang knows, but for large machines such as steam engines, Huo Gang really doesn't know how to improve it at all, so he can only tell them the principle and let them continue to develop and improve.

There is a large amount of steel, especially in the case that there is no shortage of steel and the labor cost is extremely low, so that Sun Er can test without restrictions, which is the most critical reason for the rapid explosion of technology.

And this steam train was also made by them, not the first, but the fifth version, the previous four they did not say to test, but on the ground static used as a continuous workmanship to test the efficiency of the steam engine.

Now offering to do a road test means they obviously have some confidence in their finished product.

Huo Gang is actually very interested in these trains, he didn't have much chance to see steam trains with his own eyes in his previous life, and when Huo Gang's time, not to mention steam trains, internal combustion engine trains were about to be eliminated, they were all electrified trains, only in some remote and freight trains still use internal combustion engine trains, and most of the others are electrified trains.

After getting Yang Wu's notice, Huo Gang naturally rushed to the industrial city as soon as possible, and Huo Gang had already given a reasonable answer to the construction of the roadbed of the train track, and as for what kind of construction it was in the later stage, it would need to be continuously tested.

However, the only development process that is different from that of normal trains is that Huo Gang's rail sleepers are made of reinforced concrete instead of wood.

There are many reasons, the first is that there is a shortage of reinforced concrete men, but similarly, there is a shortage of timber men! Although it is said that after taking the West Sea, there is a large amount of wood around the Yanqi Kingdom, but these woods are not suitable for sleepers.

And the wood Huo Gang, which is suitable for serving as a sleeper, also needs to be transported from other places, and the transportation cost in this era is too high, and it is not as direct as reinforced concrete.

The second is that the wood of the wood sleeper needs to be specially treated...... But how to deal with it, Huo Gang didn't know, and wood needs to be prepared in advance in large quantities, but it is not as convenient to manufacture as reinforced concrete.

Third, the wooden sleepers are more easily damaged, and the rails need to be continuously inspected, and constantly maintained, and after there is a large amount of wood in the territory of the Han Dynasty in the future, there are some places where wood can be used, but at present, wood is really not as good as reinforced concrete.

To sum up these, for the time being, the roadbed of the rails and the way the rails are made are quite a bit of a later generation, but the only difference is that the width of the rails, the width of the rails in later generations was formulated by the British, after all, the earliest rail width came from the United Kingdom.

I believe many people know the story of the train track, it is said that it was determined by the distance between the buttocks of two war horses pulling the carriage in ancient Rome, which is the so-called principle of path dependence, which has some truth.

But whether it is really because of this, in fact, Huo Gang is not clear, but in later history, there have been countless arguments about the width of the track, whether it is a standard gauge of 1435 mm, or a narrow gauge of 1067 mm, or a wide gauge of 1524 mm, the wide gauge of 1676 mm is actually not a big difference.

First of all, broad gauge does not necessarily have more load, broad gauge is not necessarily faster, and narrow gauge does not necessarily have less load, because these tracks are used all over the world, for example, the world's heaviest trucks are driving on narrow gauge.

And the cost difference between the two is actually not much, there is almost no big difference.

Therefore, these data, Huo Gang originally wanted to directly follow the standard track of later generations, because for Huo Gang, the data that has been used by countless people for many years, there must be a certain amount of truth, no matter what the reason, at least it is not wrong.

But after thinking about it, in the end, Huo Gang handed it over to Sun Er and they decided to go by themselves, and they decided to make as much as they could. Because of the width of the rails, in fact, there is some influence, such as the famous example.

Later, when you saw the American spacecraft on the launch pad on television, you noticed that there were two rocket thrusters on either side of its fuel tank, which were provided by the factory in Utah.

If possible, the plant's engineers would like to make these thrusters fatter so that they have more capacity, but they can't, why?

Because after these thrusters are built, they are transported by train from the factory to the launch point, and on the way they have to pass through some tunnels, and the width of these tunnels is only a little wider than the width of the train track, but we must not forget that the width of the train track is determined by the width of the horse's buttocks.

So this thing actually has a certain impact on the future, but this impact is not so big, Huo Gang doesn't care, anyway, now he is the first to get out of the train, no matter how the future generations develop, the train track he makes will definitely become a standard train track in the end.

After Huo Gang arrived in the Industrial City, Yang Wu and the others naturally greeted him as soon as possible, and Huo Gang could be regarded as the first batch of craftsmen in the entire Industrial City, and they were also the most authoritative.

Sun Er, Lu Mu, Lu Feng, Tian Zhong, Xu San, including Sun Ran, Zhuge Hai, and even Chen Min ran over.

"How? How wide did you choose your track? Huo Gang asked with a smile.

"We tested the tracks, and there didn't seem to be much difference, but our No. 5 large steam engine was slightly wider because of its size, so we rounded it up and used a 1,600 mm wide track." Lu Feng immediately gave a number.

"Well, yes, there is really not much difference in how wide the track is, as long as you think it is appropriate, take me to see it now." Huo Gang smiled, this number didn't matter to him, anyway, no matter how wide the track was, there was not much of a gap.