Qin Ze said a lot of Tang Dynasty salt ponds in one breath, and Cui Shi was also a little surprised. However, although Qin Ze was right, these salt pools in Lingzhou were not in Lingzhou City.

And how can there be a salt pond in Lingzhou City, but there is no salt pond, but there is a salt mine.

The salt in the salt pond can be eaten directly, but the salt in this salt mine is all brine salt. Because it contains a large amount of mineral elements, people will die if they eat this directly.

At this time, there was no such thing as distillation and filtration, and of course it was impossible to say any crystallization and refining method, otherwise Datang's salt would not be so expensive.

Nowadays, the salt of Datang either comes from the salt pond of Yanjing or from the salt drying of seawater. And this black brine is really not eaten by anyone.

Cui Shi also laughed when he saw Qin Ze like this. Pointing to the brine salt in the deep pit, he smiled and said, "Black salt is poisonous and cannot be eaten by humans." The limbs of the food are weak, and the body is dead. Such a simple truth, doesn't Deputy Lieutenant Qin still understand? ”

After saying this, his voice changed, and he stared at Qin Ze and said, "Deputy Lieutenant Qin, is this deliberately trying to shield these chaotic people?" ”

"Naturally, you don't need Lord Cui to care about it or not, I'm afraid that Lord Cui will deliberately hide it and not report it, don't you want to let such treasures sit in your own hands?"

As Qin Ze said this, he let Erhu go down to the deep pit and knocked down a large piece of it on those black salt mines.

This thing is indeed a brine salt, Qin Ze licked it with his tongue. It was bitter, astringent, and salty, which directly made half of Qin Ze's tongue become paralyzed.

The second tiger on the side hurriedly took out the kettle and asked Qin Ze to sip his mouth, otherwise his tongue would be paralyzed outside his mouth, which was really a bit funny.

Qin Ze didn't expect this thing to be so powerful, it was much stronger than any peppercorns or something.

Cui Shi on the side also smiled contemptuously when he saw Qin Ze's tongue sticking out outside.

"This is black salt, and there are too many impurities in it to be eaten directly."

I don't know when Sun Simiao walked up, looked at Qin Ze's tongue that was spit out, shook his head angrily, and then threw him a cyan pill.

Qin Ze hurriedly swallowed it, and immediately felt that his entire tongue became cool and cool. Suddenly it was a lot better, and my tongue was able to take it back when I felt it.

"It's like a toad." Cui Shi sarcastically said to Qin Ze again without a look.

It's just that Qin Ze didn't bother to pay attention to him, but nodded at Sun Simiao, which was regarded as a thank you to him. Then he asked Erhu to call Wu San and them.

The reason why Qin Ze has never touched the salt is because this thing is taboo in any dynasty.

Grain, salt, cloth, and iron can be said to be in the hands of the state no matter which dynasty or generation they go to. Now the salt of the Tang Dynasty is completely in the hands of Li Er, this thing is related to the entire Tang Dynasty lineage, if anyone dares to touch it, it will be light to punish your nine clans.

It's just that now it seems that it is necessary to hand over this technique, firstly, it is enough for Qin Ze to eat lackluster food these days, and secondly, his importance in Li Er's heart now is self-evident. Surprised Li Er little by little before, presumably he was already able to withstand Qin Ze's toss.

So even if it's a little out of line now, it won't seem too abrupt.

The reason why Wu San and the others were called here was to give them a future. This method of refining brine salts is very simple, and it can even be said that anyone can learn it by reading it once, but this thing is related to the Tang Dynasty after all, and Qin Ze naturally will not give it to others casually.

You must know that for today's Turks, Datang's salt is something they have always been inseparable. They are located inland, so naturally there is no such thing as sea salt. Moreover, Qin Ze knew that in the Turkic land, there were many such salt mines. If this technology is passed on, then how can Datang exchange war horses with the Turks?

If the people present have crooked minds and find a remote place to secretly refine salt, they will not be able to implicate themselves in the end. This kind of loss-making business Qin Ze will definitely not do it.

went to the logistics to ask for an iron pot, and Cheng Huailiang and they consciously surrounded the surroundings. Everyone knows the importance of this thing, and everyone knows what it means if Qin Ze can use this thing to refine table salt.

Nowadays, countless soldiers still bring their own vinegar cloth, that is, the cloth is boiled with salt and vinegar and various spices. When you eat, put this thing in a pot and cook it, the taste is naturally not as good as salt, but it can be regarded as salty.

So these soldiers are already very happy, because without table salt, people will be short of sodium ions. This can make them weak in their limbs, and severe salt deprivation can make them convulse.

Qin Ze called Wu San and a few people, all of whom were selected from those craftsmen in Lingtai County last time. Qin Ze introduced the ins and outs of the matter to them in detail, and at the same time let them choose whether to continue or quit now. After all, if Li Er had the intention of killing people and killing people, the few of them would still be extremely dangerous.

"Lord Qin laughed, I can't wait for such a magic skill, even if I end up in a different place, I have to see a thing or two." Wu San said with a grin.

Qin Ze nodded, when it came to this, he said everything that should be said and what should not be said. These people are not stupid and naturally know what it means to refine table salt.

"Pray, if Your Majesty is kind-hearted, you can at least be a salt official." Qin Ze patted a few people on the shoulder, and then stopped talking.

Before this, Qin Ze poked his head out again and shouted at Cui Shi: "Lord Cui, why don't you and me make a bet?" If I can really refine table salt, how about you let these people go? ”

"What if you can't refine it?" Cui Shi said with a gloomy face, staring at Qin Ze.

"Leave it at hand, Qin Ze will definitely not cause Cui Shi a little trouble at that time.

Bet on something, Qin Ze likes this thing the most.

At first, Cheng Huailiang was still worried, but as soon as he heard Qin Ze say such words, he immediately pursed his lips and laughed.

Cheng Chumo on the side asked him curiously what he was laughing at? In his heart, if this brine salt could be eaten, he would have eaten it a long time ago, and could he wait until now?

Cheng Huailiang whispered in Cheng's silent ear: "Now no one in the entire Chang'an dares to bet with him, and the Cui family ended up disgraced because of the bet with him." Father and Uncle Wei Chi also made a bet with this guy, and the result was also a complete loss. As long as this guy mentions a bet, he wants to whole up. ”

Qin Ze's name in Chang'an, Cui Shi, naturally didn't know, and seeing that Qin Ze was determined to stand up for these people, he naturally nodded and agreed.

Qin Ze glanced at his head, smiled evilly at Cheng Huailiang, and then shrank into the tent.

Using a scimitar knife to knock down a few pieces of black-brown halogen crystals, Qin Ze asked Wu San and the others to carefully grind this thing into powder.

Then have people add a lot of water to the iron pot, dissolve the powder with water, and then use gauze to dissolve something. Strain it all out so that the liquid in the pot is a little clearer.

The next step is the most important step, although most of the impurities have been removed, there are still some dissolvable mixed in.

This will require the use of activated carbon attachment, which is the technology used to purify drinking water in later generations. Of course, don't listen to the name so high, in fact, it is to wrap charcoal powder in gauze, and then filter the liquid.

So Wu San and the others were surprised to see that the liquid in the iron pot slowly became clear and transparent.

Qin Ze didn't explain to them, but asked Wu San to start a fire, and he wanted to start boiling this pot of salt water. As the water evaporates, there is less and less water in the pot. At this time, some white particles have precipitated on the surface of the liquid. This thing is table salt crystallization.

It took half an hour to boil a pot of water before it was completely boiled, and all that was left was the salt of Baihuahua.

Wu San reached out in disbelief and grabbed a handful inside, and stuffed it into his mouth without saying a word.

This scene is stupid Qin Ze, this thing is table salt, so you are not afraid of being killed if you eat it like this?

Sure enough, Wu San's expression became exaggerated in the next second, but this guy didn't spit it out. I swallowed it like that.

Qin Ze: ......

When a dozen catties of salt were taken out by Qin Ze, everyone present was stunned. Cheng Huailiang was the first to rush up, but he didn't say a word......

Then there is Cheng Chumo, Sun Yufu......

The corners of Qin Ze's mouth kept twitching, and when he saw that these people had swallowed this thing in the end, his expression became even more weird.

Cui Shi on the side also couldn't hold back, and walked up, he didn't grab a handful and stuff it in his mouth, but lightly dipped some and put it in his mouth.

"This is high-grade green salt, and it costs at least 300 wen in Chang'an City to buy a catty. On weekdays, it is used by dignitaries to brush their teeth. Sun Yufu was the first to speak, but he was also salty enough at this time, so he spoke a little neatly.

The reason why he rushed to say it was to tell everyone that this thing could not have been brought by Qin Ze. It is also to emphasize that this thing is refined.

Three hundred wen per catty?

Qin Ze was also stunned, and he checked the salt in his hand. I immediately understood why Datang Salt and Iron was monopolized, and I got ten catties of hard work for a while, and if I sold it, wouldn't it be worth three dollars.

If you hire a few more workers, you won't be able to count the money in a day.

"Tsk, good deal." Qin Ze muttered to himself.

Sun Yufu on the side didn't say a word, took out the official document, and began to write. By the time Qin Ze reacted, he had already written about the same.

"Please also ask Deputy Lieutenant Qin to record this law in the book, and we can send it back to Chang'an so that the world can celebrate together." As he spoke, Sun Yufu stuffed the pen over.

This is not to give yourself time to breathe, for fear that you will have some crooked thoughts.

Qin Ze couldn't cry or laugh, but he also knew that Sun Yufu was afraid that he would really touch this thing.

The method is quite simple, but Qin Ze focused on Wu San and others. and suggested that Li Er borrow the business channels of the Taiyuan Chamber of Commerce to transport these salts.

This is what Qin Ze has always planned, he wants to make the Chamber of Commerce in Taiyuan a real imperial businessman!