Li Nan felt a little in a trance, this cultivation planet is really difficult to describe in words, let's say backward, everyone outside is indeed wearing all kinds of ancient robes, and ordinary people are indeed as backward as the ancient planet.

However, some technological development is not weaker than that of the Tunguska Empire, and even slightly better. It can be seen that the development here is really quite deformed.

It can even be said that the cultivation world and the ordinary people are simply two worlds, if you want to talk about class division, the class division here is obviously more serious than the Tunguska Empire, but there is no clear detailed description of the different levels.

You see, no matter how big the class gap is in the Tunguska Empire, the big guys still know what kind of state each other is in, what kind of status and power each other has. But on the side of the cultivation planet, ordinary mortals can't understand the world of cultivators at all. The gap between the two sides is like an abyss, and they are also separated from each other.

From this point of view, sometimes a world with clear class divisions may be better mixed than a world with blurred lines, at least not in the world of the rich, you can't imagine.

Li Nan has a shopping habit, which has been said before, so now he has seen thousands of different exercises in the white jade slab, where can he still endure it?

Except for some exercises whose names are too low, most of the remaining exercises Li Nan wants to buy, plus the price of those exercises is indeed not expensive, so in the end, Li Nan almost bought all the books in the library hall, and the indoctrination of those exercises made his brain a little groggy.

"Tsk, the knowledge indoctrination here is too bad, not as good as the Tunguska Empire. Li Nan, who walked out of the library hall, touched his still somewhat drowsy head and couldn't help complaining.

On the side of the Tunguska Empire, as long as the knowledge indoctrination is not violently instilled all at once, then it is basically bearable, and the brain will not be painful, but there will be a little confusion of knowledge.

However, more than 2,000 exercises have only been instilled here, and the one with the largest number of words is only more than 10,000 words, which makes the brain dizzy, which shows that the technical level is indeed not as good as that of the Tunguska Empire.

I found a place, slowed down for a while, and ate a few more calming and concentrating Qingshen Fruits, which suppressed the previous nausea.

This time, Li Nan didn't go back immediately, anyway, it was still early, so he walked around this side of Dafang City.

This is Qingxu Mingfang, which is Dafang City, which was jointly founded by the Qingxu faction and the Qingxu faction, whether it is the number of goods, the type or the safety, it is guaranteed, so Li Nan is not worried about the safety of his life at all, and he is very relaxed to walk around here.

The things here are obviously two levels different from the things in the previous loose market, and there are no small stalls on the street at all, and everything can only be bought in the shops, which isolates some small households.

Those who do business here and open shops are either families, or which elders of which sect, or the shops opened by the sect itself. The number of shops opened by casual cultivation is really very small, and even if there is, it is basically those that can be opened by casual cultivation.

Naturally, this time it was another big purchase, because it would not be possible to practice for a period of time in the future. Li Nan felt that if he only learned the knowledge of the Tunguska Empire, it would be a little too monotonous, so it would be better to take the time to learn the method of alchemy refining here.

So this time, Li Nan purchased a lot of things, including alchemy furnaces, refining furnaces, and all kinds of low-level materials, and of course, some books on entry-level alchemy and qi refining techniques.

As for saying that his cultivation is low, he has no Danhuo at all, and he has no way to refine weapons, which is even more ridiculous.

Just kidding, Li Nan does not have a Danhuo, and it is said that there is no earth fire for ordinary alchemy. In the final analysis, the main reason why Danhuo is used is because ordinary flames cannot reach that temperature and there is no way to specifically manipulate the temperature at the right time.

With the technology of the Tunguska Empire, it may be a little difficult to get out a flame of tens of thousands of degrees, but a few thousand degrees is not easy, and ordinary alchemy does not need such a high temperature at all, a temperature of three or four thousand degrees is enough.

If you want to refine a low-grade pill, it only takes 1,800 degrees to be enough. The temperature required for the refining may be higher, but the higher point is not a problem at all.

It is easier to control the temperature of the flame with the technological equipment of the Tunguska Empire, and it is even easy to do it with accuracy within ten degrees, so with such an accurate temperature, the success rate of alchemy is not too high.

Moreover, the extraction steps before alchemy are even more convenient to make on the side of the Tunguska Empire, and the subtle operation of the quark level is accurate enough to fully extract all the active ingredients in the medicinal materials, without the slightest impurity. In fact, atomic-level operations can already do this.

After Li Nan finished purchasing, he hurriedly returned to the laboratory of his own room in the Tunguska Empire and began to study the production method of Bigu Dan. He was now a little disgusted with having to eat every day, so it should be quite useful to research Bigu Dan that suited his taste as soon as possible.

He was most confident in this thing, because the Tunguska Empire itself also had nutritional potions, nutritional pills and the like. Although the duration is not as good as that of Bigu Dan, there are some similarities in the end, so it should be easier to make.

There is a plant extraction machine here, so Li Nan doesn't need to buy it extra, just use it directly.

In order to ensure the accuracy of compatibility, Li Nan had to first analyze the specific composition of the original Bigu Dan. Because if you don't know the specific ingredients of Bigudan, even if you extract all the ingredients of Zhuyu grass and Muhe, you don't know which ingredient to use.

After the active ingredients of Zhu Yucao and Mu He in Bigu Dan were extracted, Li Nan put them in the alchemy furnace for specific synthesis. Because alchemy didn't have any data, there was no way to simulate the results in the light brain, and Li Nan could only choose to try gradually, and gradually try the temperature required.

The result was not very good, and it was refined many times, but the elixir was not refined, but a large number of debris of various unpleasant smells were refined.

Li Nan really didn't bother to put the last medicinal liquid in the Dan furnace to refine it, so he directly used the test tube to prepare it as a medicine according to the medical knowledge he had learned.

As a result, I didn't expect this casual trick to be successful, and the alchemy did not produce any results, but I didn't expect that the matching according to the way of drug compatibility would produce results.