"Immortal Chief, can seawater still make salt? This sea water is so bitter that you can't drink it at all! Niu Deshui said very puzzled.

In this era, salt production was very small, and it was produced in very few places.

Therefore, salt is a strategic material at this time, which is basically controlled by the state, and no private person is allowed to sell it.

It's just that there are still a lot of smuggler salt dealers, and they all have backgrounds behind them. Such talents can make a profit from it and will not be investigated. As long as there are interests, there are people involved, this is an eternal truth.

In this era, two huge sources of salt in later generations were unusable, one was brine salt and the other was sea salt. Because these two contain many other minerals, they are not only bitter but also poisoning after eating.

So basically, this is the well salt that has been used in the era, so it is not enough at all. In this area of Dengzhou, Lu Hanyang checked it out when he first came.

He found that the area in the northwest of Wendeng County was a natural rocky beach, a natural salt drying field. This does not seem to be the case in later generations, and most of the time it is due to some change in the course of the future, and this rocky beach has disappeared.

For example, it was turned into a quarry, and the stones were mined, and then it became a big pit, and then the vicissitudes of life were filled in again or something.

But in any case, that area is indeed a very suitable place for salt. Compared to pouring an area with cement, it is more worry-free and labor-saving.

All you need to do is make a passage to the sea, bring the sea water into it, and put a lot of filters in the channel.

In fact, seawater salt drying has to go through the process of precipitation, that is, other minerals in seawater are replaced and decomposed by chemical reactions. It's just that Lu Hanyang didn't know what the principle of this chemical reaction was, so he thought of the simplest thing to do.

In this era, salt is actually not made finely, and some of it is good to eat, so why bother so much?

Lu Hanyang felt that a few more filters could actually achieve the effect of that chemical reaction, so Lu Hanyang didn't feel that there was anything wrong with his way.

"There is a lot of salt in the sea, and I know that very well, and as for the bitter taste you mentioned, it is just that there are other ingredients in it, and those things are harmful to the body if eaten." Lu Hanyang said.

"Immortal Chief, what you said, the lower officials don't understand, since it's harmful to the body, why does the Immortal Chief have to get it out?" Niu Deshui said.

"Wouldn't it be okay to get rid of those harmful things? Why are you so stupid? Lu Hanyang said.

"But Immortal Chief, we can't see those things, how can we separate them? He also asked the immortal chief to cast a spell ......, "Come on, Niu Deshui thought that Lu Hanyang was going to cast a spell to separate those bitter and harmful things from people."

But what kind of immortal method is this, it is completely the application of physical and chemical knowledge, using chemical reactions is chemical knowledge, and filtering is physical knowledge.

The particles of harmful substances in seawater are larger than those of salt, so they can be precipitated by filtration. However, this cannot be completely eliminated, so it needs to be filtered several times.

"This seat will naturally teach you how to do it, and if you are taught it, you can do it easily, not something great!" Lu Hanyang originally didn't plan to dry salt in seawater, because he couldn't figure it out himself.

It's just that after coming to Dengzhou, seeing that the living conditions of the people are so difficult, he really wants to do something for them, and it is not realistic to go out to sea to fish now, because there are no materials to build large boats, and small sampans cannot sail at all, how many fish can be caught on the coast?

That's why he came up with the idea of drying smoke in the sea, even if it is not very mature, but it should have an effect.

"You prepare, select some flexible brains, and go to the beach with me tomorrow, Wendeng County is very suitable for salt drying farms!" Lu Hanyang commanded.

"Xiaguan will do it, how many people does the immortal chief want to choose?" Niu Deshui asked.

"How many? In addition to the filtration process, everything else is pure manual work, which can be more, and as for the candidates for filtration, there are about a dozen. Lu Hanyang thought for a while and said.

Filtration is actually very simple, but how many layers of filtration can remove the bitter taste in the seawater is the best, and I am afraid that the salt will be reduced a lot if there is more, and the yield is not high. If there is no filtration, it is not clean, and eating that kind of salt is not good for the body.

Therefore, it is very necessary to grasp the degree, which requires those who have flexible brains, after all, this is the first time to do this kind of thing, and they must master the measurement.

On the second day, all the people of Dengzhou City followed, and thousands of people along the way followed Lu Hanyang towards Wendeng County. This move almost scared the county magistrate of Wendeng County half to death.

I thought that there was some kind of plague or famine in Dengzhou, and these people came to Wendeng to flee and eat.

It's just that it didn't go according to the worst-case scenario, but went in the other direction when Livingdon County was still a few miles away. The people of Wendeng County also followed in this process, whether they received the news or were curious.

Along the way, a huge group of people came to the stone beach, and this time among the people who came from Dengzhou, there was a large group of soldiers from the Zhichong Mansion sent by Niu Deshui. They carried thick linen cloth and some arm-thick wood.

"Nail the wood into a box, and then wrap the linen cloth on it, remembering to wrap it evenly, not thick in some places and thin in others." Lu Hanyang commanded the task.

There are naturally suitable people to do such things, such as nailing wooden frames, there are special carpenters, no iron nails, directly several riveted structures are stuck, and there is no need to use nails at all.

The people went to do these simple jobs, and Lu Hanyang's work had just begun, and his workload was much more than that of these people.

First of all, although this piece of stone beach is quite flat, it is not really regular, and it needs to be done well, and there is also a need to leave some slope for salt collection.

Later, a channel-like aqueduct had to be dug for the distance from the rocky tidal flat to the sea. And you have to get out the slots of the wooden frames used for filtration, so that you can put these wooden frames into the waterway for filtration.

Of course, there is also the water inlet that needs to be isolated, after all, salt is drying here, and the sea water is constantly flowing in there, and it is impossible to dry it out.