I was engaged in infrastructure construction in the Han Dynasty [Transmigration Book]

Tourmaline, also known as tourmaline, has a variety of colors and is very beautiful. It can be used as jewelry, but it is more widely used in industry.

However, with current technology, tourmaline is more likely to be used as a gem than any other use.

At this moment, when other people saw the tourmaline presented by Wei Buyi, expressions of interest appeared on their faces.

Huo Guang even said: "This is the first time I have seen such a beautiful stone."

Liu Tan glanced at him expressionlessly and said, "This is also a kind of gemstone, as precious as crystal and jade."

Everyone was obviously taken aback, Wei Buyi asked immediately without delay: "Is this a new gem?"

Liu Tan sighed and nodded very tiredly.

Huo Guang pondered and said: "Your Highness, it seems that we really have to choose those places before."

Because coal was used as an example, they did not doubt Liu Tan's statement at all.

What's more, this stone is indeed very special.

In fact, in Liu Tan’s opinion, the quality of this tourmaline is not particularly good, it is small in size, and its transparency is average, but natural tourmalines with outstanding color and good transparency are rare.

The ones that can be achieved are generally at the jewelry level, even in the era when the output was very large in later generations, they are very precious.

This piece is not considered in any way, but it is indeed tourmaline, and tourmaline can be lightened by heat treatment of dark tourmaline, and can also increase transparency.

Liu Tan picked up the dark green tourmaline. Although the transparency was not particularly good, it still reflected bits and pieces of light under the sunlight, causing a pair of eyes to flash in his mind unexpectedly.

"Forget it, send someone to see how to mine it. The bigger the stone, the more transparent it is, it is the top grade. First pick a part of the top grade, and I will bring it back to Chang'an later."

Even though Liu Tan knew that this kind of gemstone was novel and precious these days, it was not easy to open up the market and let people accept it at first. Now when it comes to jewelry, the first thing that comes to mind is jade and agate, those buried with the Han Dynasty. Things can also explain a lot.

But it doesn't matter, Liu Tan is better than others because he has a mother who is a queen.

If there is a title of queen of goods these years, the queen must do her part.

Except for the accessories that only queens can wear, anything that appears on Chen Ajiao's body will definitely attract the attention of others, and it will easily create a popular whirlwind among the noble ladies of Chang'an.

And the tendency of the nobles will affect the common people. Although it will take time, once the tourmaline can be promoted, Liu Tan will have another source of money.

But...he is really not short of money now, why not let him build an industrial zone?

In the end, Liu Tan directly gave up his own land selection. He searched for a few densely populated places in the places that Huo Guang asked him to select before, circled them and asked cautiously: "Are you sure this time? I really won't find mines again." right?"

Huo Guang laughed out of shame this time: "Don't worry, Your Highness, I have sent people to investigate this area carefully, and there is absolutely nothing..."

Speaking of this, Huo Guang suddenly hesitated for a moment: "Why don't you go and have a look, Your Highness, just in case..."

What if there is something new they don't know?

When he said there were no mines, he meant that there were no such mines as they know now.

Seeing that he paused, Liu Tan just wanted to ask, but soon understood what he meant, and said bitterly, "Then let's build it first!"

There are a lot of mineral resources that he doesn't know much about, not to mention that even if they are dug out, they may not be useful. Many minerals are only discovered and used after a certain level of technology. Since they can't be found now, let those things stay underground.

Liu Tan had given up struggling. He had thought before that there might be minerals in this barren land, but he didn't expect the minerals to be so dense, even if the land was big enough, there would be too many.

Huo Guang looked at Liu Tan's expression of lovelessness, and didn't say anything more, just asked: "By the way, does Your Majesty agree to increase your private army?"

Liu Tan slapped his head and said, "I've said that before, I've been so busy these two days that I even forgot things."

Huo Guang quickly asked, "How much?"

"Five thousand." Liu Tan hesitated for a moment: "But people...is it a bit too much? Do you want to recruit less?"

Compared with the 10,000+ mobilized army, this number may not sound like a lot, but in fact, with these troops, as long as Liu Tan has a second heart, he can go directly to Chang'an.

Liu Tan is still a little worried. This number is too many, and he doesn't need so many guards. To be honest, these guards mainly guard against the Huns. Surely no one has made up their minds, the only thing to worry about is the Huns.

It's just that if the Huns come, there will be troops from the northern border country to resist and counterattack. Yes, those soldiers under Sang Qian are used for this.

Huo Guang was also taken aback by this number, and took a deep look at Liu Tan. If Liu Tan hadn't become the king of the northern border, and he was so busy in the northern border country that he didn't want to leave, he would even doubt whether Liu Tan would He is the emperor's favorite heir. Is the crown prince's position in danger?

He thought for a while and said: "Let's raise [-] first, that's almost enough, if we discover mines later..."

Liu Tan jumped up immediately: "You think I live in the mine?"

Huo Guang thought to himself that you don't live in the mine, but the mine just follows you.

But he didn't say anything, and let Liu Tan angrily write a warrant. Huo Guang waited for him to finish writing and asked, "What are you going to do in Yang County, Xi'an?"

Liu Tan said smoothly: "Let Sang Qian go to act as the county guard first. The people sent by the father are already on the way. When they arrive, I will give them a meeting gift."

Huo Guang asked vigilantly, "What greeting ceremony?"

Liu Tan smiled: "Of course it's an exam."

Huo Guang wanted to count them as unlucky.

But he also had to admit that Liu Tan's method is really simple and effective, and it can test everyone's bottom line to the maximum. Those who can't even reach this bottom line have to go to make up lessons first no matter how capable they are!

Smart people who don't know the rules are worse than stupid people!

Huo Guang made some calculations and said: "They haven't arrived yet, and His Highness is probably about to leave. It's time for His Highness to leave the test paper."

Liu Tan raised his head and asked, "Aren't you going back with me?"

Huo Guang shook his head: "If the subject also leaves, I'm afraid the northern border country will be in chaos."

Liu Tan said with a smile: "It's not that it's not. Wasn't it good without the northern border country before? Now everything is still in its infancy, and it's okay to deal with it according to the previous experience. If you don't go back this year, you may be in the future." I got busier and busier, but I didn’t have a chance to go back.”

Huo Guang said calmly: "I have nothing to worry about."

Liu Tan said, "Where are your nephews and nieces? You don't care about them?"

Huo Guang hesitated, and finally said in a low voice: "They...have their way to go, and even if I can manage it, there is a limit."

Liu Tan's eyes widened: "You are their uncle, so it's only natural to adopt them. How can you be limited?"

Huo Guang said, "Princess Chang Xin is taking care of them."

Liu Tan said: "The eldest princess takes care of her, and the guidance of her father and brother is indispensable, especially for the little man. If the weather in the northern border country is not bad, it's okay if you bring them here."

But it’s not possible now. Huo Shan’s sudden death made Liu Tan feel quite shadowy. Huo Qubing only had one son and one daughter left, and they were not very old. Going to Huo Qubing's tomb, I can't afford to kneel, I'm afraid I won't be able to forgive myself.

Huo Guang's eyes lit up, and he began to seriously consider this matter.

However, he was still a little worried and asked: "The minister is gone, so who will evaluate the people sent by His Majesty?"

"Jiang Chong." Liu Tan said very happily: "He has no relatives in Chang'an, and he has nothing to do when he goes back. Just let him stay. Oh, Sang Qian can't go back either. He has to manage Xi'an Yang County. Those who leave can go back to Chang'an."

Huo Guang thought for a while, Jiang Chong was a suitable person, even if he looked down on Jiang Chong's superior methods, he had to say that he was a capable person, as long as he didn't go astray, it would be much better.

Huo Guang asked: "Then what will His Highness bring back this time? You can't return empty-handed."

Before coming here, everyone's impression of the northern border country was probably barren, desolate, and lacking people.

Now if you know the truth, everyone's impression of the northern border country may become-there are mines everywhere.

Liu Tan thought for a while and said, "You have to be well prepared for the gold, and it must be in good condition. You should know how many people have stumbled on it."

Huo Guang chuckled and said simply: "Your Highness should know why they stumbled. No matter who stumbles, it must not be His Highness."

Liu Tan thinks about it. The essence is that Liu Che wants to centralize power and save money, but he will never cheat his son.

Liu Tan shrugged his shoulders: "Anyway, it's good that you know it well, and then... let Wei Buyi set aside two pieces of high-quality agate, Miao Rui, to arrange craftsmen, I want to carve agate dragon and phoenix cups and ornaments, the style I'll give them, oh, yes, some gold from the treasury, um, two ornaments and a set of horses."

After a pause, Liu Tan added: "I heard that Lu Xuan has already sent the Tianma to Chang'an, it just so happens that it would be better to match a set of horse ornaments with the father."

Speaking of this, Liu Tan's mood is a bit complicated. Lu Xuan is now in Chang'an, and it seems that Zhengdan will stay there, maybe the two of them will meet again.

Until now, he was very curious about the relationship between Lu Xuan and Liu Che. Thinking about Lu Xuan's desperate efforts to take down Dawan, and then personally sent Tianma over, he couldn't tell if he just made an excuse to come to Chang'an earlier. When I look at it... I always feel even weirder.

Liu Tan expelled this idea from his mind, and continued: "By the way, let Wei Buyi bring over the relatively large tourmalines that were mined, and process the unsightly ones..."

Having said that, he suddenly got stuck.

Tourmaline can be processed, and he also knows that it is heat treatment, but this heat treatment...how hot is it?