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

In Liu Tan's impression, sea water is probably the only thing that does not freeze in cold places. Of course, sea water will freeze in extremely cold weather.

The climate in the northern border country this year is cold for everyone from Chang'an, but according to the local people, it has been considered a very warm winter.

In this case, the only lakes that don't freeze are those with high salt content, which is the legendary salt lake!

But the problem is that this lake is very close to Shuofang City, and it doesn't take long for him to go back and forth. If it was a salt lake, it must have been discovered long ago. How could there be no records at all?

But anyway, it's better to inquire first.

Liu Tan's original intention was to ask people around if they knew there was a salt lake here. As a result, the knights turned around and ran back. !"

As soon as this sentence came out, everyone was very excited.

In this day and age, it's an exaggeration to say that salt is better than gold, but it's not much worse.

A catty of salt is not as expensive as gold, but it is also extremely expensive. The most important thing is that the output of salt is actually much higher than gold!

If a salt mine can be found, it can be said that it is not much worse than a gold mine.

Liu Tan was a little dazed: "There is a salt lake here, why didn't anyone discover it before?"

It shouldn't be, the people here are so poor. Even now, every household doesn't have much salt, and it can only maintain the needs of a normal human body. This is still a good family condition. If the family condition is not good, it is really ... Do you know about salted cloth strips?

It is said that after soaking the cloth in salt water, drink a mouthful of porridge and lick the cloth strips when eating, this is the dish.

The shortage of salt is such that if there is a salt lake, how can the local people let it go?

Not to mention that there were no salt lakes before, the formation of a salt lake requires thousands of years of deposition.

Liu Tan remembered that the salt lake was formed when the evaporation of the lake water was greater than the precipitation. Thinking about it this way, the climate in Shuofang City is just right.

Seeing Liu Tan standing there silently, Wei Deng quickly said, "Your Highness, let's get some water to cook the salt first!"

Liu Tan: "Huh? Cooking salt?"

Wei Deng said happily: "It just so happens that we have briquettes, and cooking salt is much more cost-effective than using firewood."

Liu Tan suddenly had a headache: "What are you cooking!"

Isn't it cheating to cook salt in such a sunny place?

Liu Tan said directly: "Go and find out if there are any legends about this lake. The rest of you should go find a place nearby and build a brine pond as I said... Forget it, let's go back first. I want to arrange it in detail."

Liu Tan rubbed his forehead, his head hurt a little from the cold wind, this salt lake was really caught off guard.

When he went back, Liu Tan didn't forget to send someone to inform Liu Che that he was going to find a place for Liu Che to play, but he didn't expect to find a place like Salt Lake. Seeing that it was getting late, he probably couldn't play anymore, of course Send someone to let me know.

Liu Tan's discovery of the salt lake directly alarmed Liu Che.

If it was in the past, Liu Tan said that he would not care if he had something to deal with, but after going out for a walk, Liu Che was a little surprised when he brought back such news.

So he went to Liu Tan's study in person, while Liu Tan was discussing matters with Huo Guang.

Hearing that Liu Che was coming, he immediately went out to welcome him, seeing that he was following Liu Che step by step, rolling his lips without being coquettish or coquettish, and shouted at Liu Che: "Father."

Liu Che nodded and asked, "I heard that you found a salt lake? How did you find it?"

He had also heard that Liu Tan discovered coal mines, copper mines, broken gold mines, iron mines, and cinnabar mines by simply pointing at the map a few times before, but he basically listened to them as stories in the past.

Even if he thinks that Liu Tan is a god descending to earth, he still doubts how accurate it is, especially when he said before that Qi and Changyi should have coal, but until now Liu Fuling and Liu Wei have not found coal mines, don't It is said that there is a coal mine, and even the cinders have not been found!

So Liu Che originally thought that Huo Guang was trying to create Liu Tan's immortal figure, in order to frighten the Huns.

The Huns also had faith, and were even more devout than the Han people.

Han people generally go to worship when they need it, or only go to worship during New Year's festivals, but it is said that the Huns eat three meals a day, and they never leave the gods in their mouths.

In this case, there is a god king on the opposite side, which will definitely bring pressure to the Huns.

Now it was the first time for him to personally experience Liu Tan's discovery of minerals, which were still very rare salt mines, and he couldn't help being a little curious.

Liu Tan explained: "Erchen made an ice cart before, because he was not sure whether it would work well, so he took Wei Deng to try it out, and changed it halfway. After the test, the ice surface of the lake that was originally tested was gone It was destroyed, so I wanted to find another lake so that my father could go to play on the ice cart, but I didn't expect...to find a lake that looks like a salt lake."

Up to now, Liu Tan has never dared to say that it is a salt lake. What if it is only because of special circumstances that it does not freeze?What if it's because of geothermal heat?

However, after the cavalry said that the lake was salty, this possibility was infinitely approaching.

Liu Che asked, "How did you let them find it?"

Liu Tan was stunned for a moment: "Just... I found a lake on the map and let them have a look."

Liu Che's eyes suddenly became very complicated. After watching Liu Tan for a while, he patted his shoulder and said, "In the future, if you have nothing to do, look at the map more often."

It took Liu Tan a half a beat to react, and he couldn't help crying and laughing: "This...is an accident."

Huo Guangyou said: "You have a little more accidents, why don't you choose a place every month in the future."

Liu Tan said expressionlessly: "Didn't you ask me to choose a place before? Are there mines in those places?"

Huo Guang pouted and said: "Yes, it must be an unintentional move by His Highness."

Liu Tan was helpless, and Liu Che sat down directly and said, "Go ahead and talk about what you were discussing just now, don't worry about me."

Liu Tan got stuck for a moment, interrupted by Liu Che, he really forgot what he was going to say just now, looked up at Huo Guang, Huo Guang reminded: "His Highness just said that he will build a brine pond."

Liu Tan came to his senses: "Oh, yes, the brine pond is actually a shallow pond dug, the soil at the bottom of the pond is compacted, and then a drainage channel is made with the salt lake. After the lake water is diverted, the pond will stop when it is full, and then put That's it."

Huo Guang looked up at Liu Tan and asked, "Place it? Don't worry about it?"

"Don't worry about it, just wait a few days to collect the salt."

Liu Che suddenly asked, "Don't you need to cook?"

Liu Tan explained: "It's fine to use the sun. The northern border country has plenty of sunshine, so there's no problem."

Liu Che still had an expression of disbelief, so Liu Tan had no choice but to turn around and said, "Go get some salt water."

Immediately someone took orders to go, Liu Tan put the salt water in a wine cup and threw it outside, and then said: "If this wine cup is dried in the sun, the water inside will slowly dry up and turn into a layer of salt. "

Liu Che was a little curious, and immediately sent someone to watch. Liu Tan gave the little eunuch who was in charge of watching sympathetically.

Fortunately, although it is winter now, the winter in the northern border country is drier, so it doesn't matter even if the sun is not so hot, the water inside will evaporate quickly.

Huo Guang said: "If it is so easy, then this method..."

How many people's views can be overturned by this method?

Liu Tan turned to look at Liu Che, Liu Che said without hesitation: "Send people to surround the lake, this method must not be spread to the public!"

The method was brought out by his son, so naturally it should be used by his son to make money. Even the royal family has no reason to spread it openly and selflessly.

Liu Tan hesitated for a moment, but did not refute. Even if he spread the word these days, people using this method may not necessarily reduce the price of salt. It is more likely to use a method of saving money, but the price of salt remains the same. It's just looting money.

Liu Tan said, "Oh, by the way, prepare for it. Next year, the people of Shuofang City will distribute salt at half the current price."

He doesn't know how big the salt lake is. If possible, he would like to benefit the entire northern country, but let's take it step by step.

Huo Guang looked up at Liu Tan and said nothing. Liu Tan took people out to discover this salt lake, and he also provided the method. It can be said that this salt lake basically belongs to him, and he can sell it for as much as he wants. It was not Huo Guang's turn to object.

Liu Che on the side was not happy: "How much money do you have? So splashy, let's see what your palace looks like? The best place is actually the iron-eating beast's garden!"

Liu Che was very unhappy, how could his son live worse than an iron-eating beast?

Liu Tan glanced at him blankly: "Now...it's very good."

This palace has really fulfilled all his wishes. I think his biggest wish before crossing is probably to have a villa with a big garden. It would be even better if there is a swimming pool.

Now the palace basically fulfills all his wishes, even beyond his imagination. I don't know why his palace always seems to be rejected.

Liu Che suddenly regretted sending Liu Tan out of the palace at the beginning, to see how he developed outside.

But he was also surprised, why did so many princes and kings change their painting styles when they came to Liu Tan?

All the princes and kings, including Liu Fuling and Liu Wei, had restrained themselves as much as possible when Liu Che passed by, so as not to appear so extravagant, but Liu Che could still see how extravagant their lives were.

And Liu Tan... Liu Che heard that the band dancer in his palace would only appear when entertaining guests, and he never used it when he was eating by himself!

Liu Che originally wanted to talk to Liu about the money and let him spend it freely, but now it seems...he decided to change the way.

So Liu Tan stared dumbfounded at Bu Fan, who was beside Liu Che, and the palace servants began to busy lay out the palace for him.

Seeing this, Huo Guang slipped away, leaving only Liu Tan looking at Liu Che helplessly. Just as he was about to say something, Miao Rui walked over and said, "Your Highness, the person sent by General Li to bring you sand has arrived."

Liu Tan's eyes lit up when he heard this, and he rolled up his sleeves: "That's great, it can be regarded as coming."

For a moment, Liu Che felt like dreaming back to the year: "No, why did you ask Li Buyi to send you sand?"

Liu Tan said happily: "Crystal windows are too expensive. If you use them in Weiyang Palace, there must be people who want to persuade them. I want to replace them with something cheaper and transparent."

Liu Che looked skeptical: "Do you make it with sand?"

Liu Tan was a little uncertain: "It should be possible. Actually, it shouldn't be sand. It's just that there is something in the sand. I can't say for sure. I won't know until I do it. But don't worry, I won't do it these days. Let’s talk about it when you return to Chang’an, I’ll take you to the ice cart tomorrow.”

When Liu Che was here, his task was to play well with Liu Che.

Liu Che lowered his head and pondered for a while and said, "Then... I will go back a few days later."

Liu Tan:? ? ? ? ? ?