Fang Tian's hunch was correct.

What he assumed to be sodium nitrate potassium could not be precipitated from sodium chloride by heating and then cooling, or rather, theoretically, but not practically. -- He repeated the heating and cooling steps seven or eight times before he could barely get this thing out of it.

It can be done in this way, but it is obviously not possible in actual production.

Don't say it seven or eight times, even three or four times, it will be too cumbersome and heavy.

Letting go of this sample for the time being, Fang Tian set his eyes on the last two samples, and after a while, he came to the conclusion that the last two samples were similar to the previous one.

Five salt lakes, three are toxic, one is not salty, and one is low yielding.

The last two don't need to be thought about, the first three......

Fang Tian thought about it, but decided to throw this problem out and let those front-line operators, that is, salt workers who have dealt with salt all their lives or even generations, give it a try, although they don't even know what sodium chloride is, let alone what impurities are mixed in salt.

In ancient China, when it was still the Song Dynasty, it was also the salt industry, and those who dug salt could drill salt wells more than 1,000 meters deep into the ground. Even after a thousand years, Fang Tian knew about this, and he was dumbfounded and completely unbelievable.

Nima, more than a thousand meters, all manual work.

There are many more examples like this.

Therefore, for the so-called "wisdom of the vast number of working people", Fang Tian has always dared not underestimate it.

Perhaps they do lack in theory, but in practice. Its means of solving problems should not be underestimated. -- And once the theory is perfected, then these people are masters.

Theory. Actually, uh-huh, it's still yin and yang.

Lacking any of them, one is lame.

In the middle of August of the year 2380 of the Mauriball Imperial Calendar, in the area of Yanhuangcheng, a notice issued by the lord of the city passed through the mouth of Xiyan, the president of the Yanhuangcheng Salt Chamber of Commerce. spread throughout the five major salt lakes in the jurisdiction.

The notice reads:

Regardless of identity, origin, anyone who can make the salt produced by the salt lake more "clean" (not bitter, not astringent, not colorful). can all get the official reward of Yanhuang City.

Rewards can be awarded in one of the following three categories.

1. Gold coins.

2. Yanhuangcheng points.

3. The study quota of Yanhuangcheng Vocational and Technical College.

The reward for recommenders and solutions is the same.

As a result, "Points" and "Academy", two things that Fang Tian had been thinking about for a long time, appeared on the historical stage of Yanhuang City in this way. And then. The entire Yanhuang City was in an uproar, and then, countless messages circulated in the Yanhuang City, or diverged from the Yanhuang City.

Yanhuangcheng points?

Yanhuangcheng Vocational and Technical College?

In just a few days, inside and outside Yanhuang City, countless analyses and speculations have been raised.

Ordinary people are speculating. The scattered cultivators are speculating, and the forces of mercenary groups of all sizes are speculating. People like Mu Luo Xiyan last year are speculating, and there are many other big and small forces who are also speculating.

And regardless of the outcome of the speculation, many of them are conditional, and always want to intervene. -- There are many messages conveyed like this, "This is a once-in-a-lifetime opportunity! Perhaps, we can use this to establish a connection with His Excellency Fang Tian!"

As a result, salt workers and the like, who had never been looked at before, suddenly became so popular that they couldn't be more popular, and countless ordinary people were invited to the Hall of Cultivators without even thinking about it.

At the same time, countless "non-governmental research institutes" have sprung up inside and outside Yanhuang City.

Xiaoye City, the southernmost salt lake of Yanhuang City.

A certain magician who was assigned by the teacher early to collect wind here or drink the northwest wind began to write letters to the teacher in addition to setting up a "folk research institute".

This gentleman didn't know that his teacher had already hooked up with a certain city lord, and he carefully wrote in the letter: "Teacher, as soon as I got the news, the disciple gathered many experienced old salt workers in Xiaoye City. What the disciple wants to ask is, Teacher, if there is a result, can the disciple contact the Fang Tian City Lord?"

This poor child, at every opportunity, tried to ease his cheeks for the teacher and a certain Excellency, fearing that in the near future the two would play a PK......

Fang Tian was also writing a letter.

Specifically, it is to consider how to reply to this letter, well, to the predecessor of the Holy Domain in the Imperial Capital.

Emotionally speaking, this is a teacher who knows his friends, and logically speaking, this is Zhitan's life experience, which has given him a great inspiration and made him take another big step.

Therefore, whether it is emotional or reasonable, he needs to reply to this letter well.

But what is the reply?

It was still the wilderness and jungle under the wine mountain, Fang Tian was strolling, strolling, and at the same time checking or thinking about what he had learned.

"The Great Dao" and "My Dao Six Realms", this is a good thing, a good thing without a doubt.

Although Fang Tian still doesn't have a deep understanding of the former, and lacks the key to enter, for the latter, not to mention that this thing has laid his path in a sense, dragging him to the path of true cultivation, let's just say that step by step, every time he takes a step forward, Fang Tian's feelings about this thing are a little deeper.

And the deeper I feel it, the more I feel that this thing is amazing.

Don't say anything unfathomable, this is too vain, and it is not "unpredictable", step by step, realm by realm, he really grasps it, but even if it is already in his hand, Fang Tian still feels that he needs a long period of cultivation and interpretation, and it is repeatedly.

Well, repeatedly.

Even now, having reached the point of "Sun True Fire Realm", Fang Tian still felt that the two realms in front of him, "Empty and Silent Realm" and "Early Sun and Snow Dissipation Realm", were still worth chewing on for a long time and slowly, and reminiscing about it repeatedly.

The more you chew, the longer the aftertaste.

"Emptiness and silence" is to make people temporarily detached from the outside world of heaven and earth. Detachment, detachment from a qiē disturbances, body and mind. in order to really calm down.

Quiet is clear, clear and then can be used as a mirror.

Examine oneself, penetrate and cleanse and restore the pollution and leakage of the body and mind. This is the "early sun and snow dissipation".

In these two realms, they are immersed in self-cultivation and ignore the outside. And after the "early sun and snow dissipation", you need to go to heaven and earth again, what is the "Sun True Fire Realm" and not to say, just say that the "early yin and dust realm" behind is clear. It has a lot to do with the outside. "Leaving the dust" and "knowing the dust", one before the other, this is also a yin and yang.

Other words. Is the "Sun True Fire Realm" the status of inheriting the past and opening up the future here?

It is stepping on two boats, one in yin and one in yang, from yang to yin. Or rather. From Yin to Yang? That is, the so-called "cathode yang birth, anode yin birth" in the previous life?

As soon as he thought of this, Fang Tian's heart shook greatly.

It seems that the true face of the "Sun True Fire Realm" is about to be revealed to him.

However, for the time being, Fang Tian did not think further. ――Take your time, anyway, I realized that I couldn't run away from it here. Simmer for a long time, and it will be cooked like this. That's the soup that tastes.

And at this moment, in the sea of consciousness that Fang Tian did not observe. The brightest "sun" and the greatest "sun" were both shining and scorching, and the wind and fire between the two were driven by them, and the entire sea of knowledge, the area where the ninety-seven "suns" were located, became a sea of fire.

In this sea of fire, all the "suns" are "melted" by a certain amount of dù, and the "water" formed by the "melting" flows through this whole area, in all the ninety-seven "suns".

Then, those "suns", some shrink, some become larger, some brighter, and some go darker.

Fang Tian didn't know about this qiē.

Of course, even if he knew, he wouldn't care too much. -- Come as you want, just as you want, and let it be.

Fang Tian was still thinking about replying to the letter.

These "Great Dao" and "My Dao Six Realms" cannot be transmitted.

It's not that Fang Tian cherishes himself secretly and is reluctant to give up good things, but the source of this thing, even now, Fang Tian is confused. -- This thing came from "knowing the sea", but where did that "knowing the sea" come from?

Did he cultivate it?

Fang Tian didn't know.

That "Zhihai" has appeared a long time ago, but how do you look at it and think, with his cultivation level at that time, there should not be such a high-end and high-grade thing.

In any case, the "Great Dao" and "My Dao Six Realms" are excluded.

Next is the ninth-level inheritance of the martial artist.

This thing is useful, and it is also useful for magicians. Fang Tian didn't even rule out that if he passed this thing on in his reply, His Excellency the Sacred Domain Master might also be able to see through something.

Not to mention, the mundane meaning of this thing.

For the martial artists of the whole continent, this is a supreme secret.

No matter who spreads it, as long as it can hold it down, then he will be the first person in the world. If you have the heart to develop in the secular aspect, it is easy to build the strongest cultivator empire in the continent.

However, Fang Tian's thoughts only turned, and this thing was still ruled out.

The truth is still simple. -- It's not his thing.

He could use his own comprehension to transmit some things that surpassed the sixth-level martial arts cultivation to Grote and the three elders of Nanjin, but this ninth-level inheritance itself, at least for the time being, Fang Tian did not intend to spread to anyone.

So, what else could he get his hands on? For a person at the level of a Sanctuary.

The Yellow Emperor said that this is an ancestral thing in the previous life, and it is always not good to give it away.

I Ching?

Well, this one is classy, but Mrs. Mrs. ...... It's too classy, at least for now, Fang Tian can't understand it. It's not that this thing is difficult, "easy" is the sun and the moon, and the sun and the moon are "yin and yang".

In other words, it is also something that expounds and expresses the "way of yin and yang".

It seems to be the same thing as what he comprehended, but not to mention the level of the two, at least, the version is different between the two. For this thing, it cannot be ruled out that one day, he will understand it all at once, completely.

But at least for now, he doesn't understand.

And if you don't understand something, don't be ashamed to pass it on to others.

So, the Tao Te Ching?

This seems to work, but, ah, that, but, but this thing, it's not easy to translate.

Coming to this life, so far, he has "translated" many things from his previous life, even if it is a poem, lyrics or something that is completely absent in this world, he also copies it correctly. It's just localization in phonology, which is a piece of cake for Fang Tian.

But the Tao Te Ching is different.

Many words, many meanings, in indigenous terms, cannot be expressed, completely inexpressed.

Or it can also be said that with Fang Tian's current level, he can't copy this thing smoothly.

Even if it is forcibly copied, it can only be formed, not God.

Not to mention the natives of this world, in the past life, for many Westerners, they may know the sun and the moon, the nucleus and electrons, and the DNA double helix, but they don't know "yin and yang", let alone "one yin and one yang".

Fang Tian's heart suddenly moved.

The Book of Changes was originally not a classic (classic), but just "Yi". And it seems that it is said that in ancient times, Yi, there were no words, only images.

It seems that in later generations, there is another thing called "Taiji Diagram" or "Yin and Yang Diagram"? That is, the one where two small fish, black and white, shamelessly hook up together.

Let's pass this thing on.

With the heart animal following, Fang Tian's mind moved, and a special piece of paper had been achieved.

On that day, a thin, only paper letter, was sent to the imperial capital. (To be continued......)