Huo Gang took the stone brick with a red cloth tied to Sun Er, and very solemnly put the stone brick wrapped with a strip of red cloth where it should be.

The status of craftsmen in this era is not high, and many nobles are disdainful of craftsmen many times, only Huo Gang knows how great power these craftsmen contain in their hands!

They all have the power to change the world!

So Huo Gang put this brick in its rightful place very seriously, and when Huo Gang put this brick back into place, the voice of the spirit of the Jade Gate in his mind sounded again.

"If the first industrial building in your territory is detected to be completed, you can choose one of the following two rewards."

"First, a full set of standard basic weights and measures."

"Second, twenty elite craftsmen of the Han Dynasty."

When these two options appeared, accompanied by the excited cheers of these craftsmen, Huo Gang was slightly stunned, but he didn't think about this for the time being, but focused his attention on Sun Er and them first.

"General, shall we start work now?!" Sun Er asked with some excitement.

"Let's go!" Huo Gang immediately nodded.

"Let's go!" Sun Er immediately shouted, and someone in the distance immediately began to transport the bricks that had been prepared to this side.

Huo Gang, on the other hand, simply began to retreat and gave up the work here to Sun Er and them.

Although Huo Gang, who took a few steps back, couldn't see anything on his face, his heart was extremely entangled.

This reward is rewarded, why choose one or the other? He really wants it all!

The first one aside, even His Majesty the First Emperor knew the importance of books and cars on the same track, and of course Huo Gang also knew that they were now using ancient weights and measures.

But strictly speaking, there are some gaps in these weights and measures, and the weights and measures in ancient China are actually very comprehensive, but Huo Gang himself doesn't understand it. Although I don't know what the full set of weights and measures rewarded by the Spirit of the Jade Gate is, it is clear that this thing must be better than this era.

As for the second one, the twenty elite craftsmen of the Han Dynasty, this can not be underestimated, don't forget, the famous Zhuge Kongming in history is also a craftsman part-time, I don't know if Zhuge Kongming can be drawn out of these twenty elite craftsmen?

It's just a pity...... Huo Gang can only choose one of the two.

After hesitating for a long time, Huo Gang finally chose weights and measures, a full set of weights and measures tools, which means that Huo Gang doesn't have to worry too much when formulating relevant data later.

When Huo Gang chose the first item, the Spirit of the Jade Gate responded directly, and all the weights and measures tools would be delivered to Huo Gang's location in two hours.

chosen, Huo Gang will not be entangled, as for what these weights and measures tools are, Huo Gang did not guess, anyway, he will know after about two hours.

Weights and measures are nothing more than length, weight, volume, these tools, but I don't know what these tools are.

In fact, another reason why it was very difficult for craftsmen to teach apprentices in this era was the grasp of size, and the reason why many magical inventions in Chinese history were eventually lost was also because of this, many of the masters who made these tools did not understand culture, and they knew the size of some parts of these inventions, and they piled them up purely with experience, but they did not know how to pass them on.

Even if some drawings are handed down, because of the lack of key data, the people behind may not be able to make them according to the drawings, and finally they are gradually lost.

After cleaning up his mind, Huo Gang just looked at the cellar furnace in front of him, the volume of this cellar furnace was not large, because it was not a real brick kiln.

The real ancient brick kiln is very large, the height is at least six or seven meters high, and the diameter of the position where the bricks are placed in the middle circle is about four or five meters.

Of course, such a large brick kiln can not fire refractory bricks, because the temperature demand for refractory brick firing is relatively high, so it can only be fired by this small brick kiln, which is actually more like a cellar furnace for firing ceramics.

However, these are not important, in the end, what was really built was the cellar furnace for firing cement, and Huo Gang was not worried about this, because on the other side, the foundation of a cellar furnace specializing in burning cement had been laid.

In this era, there are very mature furnaces for burning lime, in fact, firing cement is basically the same as burning lime, and Huo Gang doesn't have to worry about these at all.

According to the current progress, when these refractory bricks are fired, the construction of the first cement cellar can be completed in a week at most! Some of the slag has already been transported, although the amount is not much, but it is enough to use in the early stage.

And slag is not necessary, in fact, you can directly grind and mix iron ore into it.

Huo Gang couldn't help much with the brick-burning work, and the weights and measures were not sent at the moment, Huo Gang simply inspected the terrain around here, their construction site relied on the Qilian Mountains for construction, which is located in the highlands.

And on the north side of them, the terrain began to be low, and from here to the middle of Yangguan, there was a piece of terrain that should be the most ground, if nothing else, after ten days, the river that appeared would flow through here.

I just don't know if the river is big or not, and if the water is too big, the first thing they will build will be a bridge.

However, there is no way to do it, nothing can be done both, and the river is more important to them than building bridges, let alone the river that is integrated into the spiritual spring water.

"Yang Lao Wu, what's going on in Yangguan?" Huo Gang inspected the surrounding terrain, and then called Yang Lao Wu to ask.

As soon as Huo Gang's question came out, Yang Lao Wu's face became weird, and he couldn't help but sneak a glance at Huo Gang, because of the appearance of Yangguan...... It's really one day at a time! And these changes ...... It is said that they were all brought by the general!

Many times, Yang Lao Wu doubted whether the general in front of him was really a god in the sky.

No, to be precise, are the gods in the heavens all the incarnations of the generals, because there has always been such news circulating in their tribe.

"General...... I don't know what to say about the current situation in Yangguan, but if you want to go back now, it will be completely different from when you left, and it has changed too much! Yang Lao Wu thought about it, he didn't know how to describe it, he had some poor words.

"Really? Looks like a good change. Huo Gang smiled slightly.

"Of course it's a good change! It's all brought by you, General! Yang Lao Wu immediately said respectfully.