In his previous life, the professor in charge of teaching Xin Yu's mathematics once told him that permutations and combinations are very interesting, and a few elements can have countless combinations.

Alchemy is like a combination of permutations, the types of medicinal materials, the number of medicinal materials, the order of putting medicinal materials, and the change law of heat...... These elements themselves are a group of permutations and combinations, which are then arranged and combined into elixirs...... For the time being, let's call it the final elixir.

If the elements that have infinite possibilities in themselves can be combined arbitrarily, how many possibilities are there? Xin Yu doesn't need to calculate, he knows that it can definitely be expressed in terms of "infinity".

And Xin Yu wanted to try to find the kind of Condensing Pill in this infinite permutation and combination, to be honest, he didn't have that confidence himself. As probably the only alchemist in this world, he knew that the appearance of a pill must have gone through countless experiments...... More experiments than Edison's invention of the light bulb.

From the process of developing the Qi Nourishing Pill, Xin Yu has a deep understanding. After knowing the medicinal properties of some medicinal materials, and also knowing a little bit about the compatibility of monarchs and ministers in traditional Chinese medicine, it took him several years to successfully refine it like a big luck.

It can be seen that if you want to find out its formula and refining method without knowing anything about the Divine Pill, it can be said that it is difficult to climb to the sky.

"What do you want to do?" after numerous failures...... The main reason is that the secretaries of the secretary group who specialize in alchemy failed, and Xin Yu personally went out. In order to speed up the refining speed, he directly used the three-flavor true fire on top this time. Therefore, the moment he mobilized his true qi, Xiao Shi sensed it and immediately asked.

Xin Yu didn't know if this monster who had lived for millions of years had ever heard of the elixir, because the stone hadn't been chatting with him for a long time, so he asked, "Do you know the elixir? It's the kind of thing that is refined with herbs or strange things, and used to take it to improve cultivation." ”

"You know, it seems that your world is not so backward, and you have begun to explore the laws of foreign objects. Xiao Shi sighed.

It is not surprising that the stone should be emotional, because of the existence of astrologers, people are always accustomed to focusing on things that can be visualized, and naturally the desire to study other things is not so strong.

Because, as a universal civilization, the astral civilization suppresses the development space of all other civilizations. Just like the world of Xin Yu, the human beings in this world have developed for more than 5,000 years, and they have been able to smelt alloys with sufficient strength, and the casting process is not very backward, but they just haven't developed a mechanical civilization. Not to mention the steam engine as the prime mover, even the hydraulic machinery is rarely seen.

If it weren't for Xin Yu's appearance, if it weren't for Chen Linqiang who gave him that opportunity, it would have been impossible for the so-called technologically advanced ocean country to rise miraculously, and it would have been impossible for him not to be disturbed by the astrologist to teach the doctrine of "crooked and heretical".

However, in the high-level world of astrology, their research on the existence of matter and its laws is actually close to "science", or rather, the two civilizations have shown common ground on the way to the "Great Dao".

Alchemy and Qi ...... Well, although it is not science, but, in Xin Yu's view, both alchemy and qi refining can be explained by the relevant laws of change in matter and energy, so he is scientific.

And the so-called common denominator is the meaning of the so-called less backward stone. It turned out that in that kind of high-level astral world, the industry of alchemy had already begun to appear, although the so-called pill was not much different from Xin Yu's Qi Nourishing Pill, and it was not even as effective as the Qi Nourishing Pill, but at least it was a civilized progress.

And the astral realm where the stone used to be located is naturally a high-level astral realm, but even a world that has developed millions or even tens of millions of years has not been able to develop high-grade pills, which shows that this craft is difficult to develop. He said that this world is not so backward, and according to the criteria for the appearance of pills, there is a little far-fetched truth.

"Oh, there are even pills in the astral realm? Then do you know how those pills are refined? By the way, do you know the elixirs that can increase spiritual power, that is, star power?" Although Xin Yu was very puzzled about how his "exclusive" ability was so worthless, he still asked patiently.

"Is it possible? All the materials of the elixir are things on the material plane, how can they have an effect on the spiritual plane?" replied Shi with disdain.

"Huh~ You're too arbitrary, aren't you? Isn't the star stone also a material thing, but how can it have an impact on the spirit of the astrology?" Xin Yucai really disdained, this stone is too brainless, "Moreover, according to my guess, matter and energy can be converted into each other, matter can't act directly on the spirit, but can't it be converted into energy?"

I don't know what the stone thinks about the relationship between matter and energy, but he still said very stubbornly: "The star stone can produce an effect, is it the soul fragment on it, is it good? Also, matter is converted into energy? You think too much, right? Even if it is energy, it may not be able to directly act on spiritual power, right?"

"If judging from your conclusion, only attached soul fragments can have an effect on spiritual power, right?, then how do you know that plants have no soul?" Xin Yu actually didn't know whether plants had souls or not, and in his previous life, except in fantasy novels, he had never heard of the example of plants and trees becoming essences. And in this life, after coming into contact with the mysterious astral world, he has also never heard of plants having souls, and of course he has never heard of plants having souls.

Well, although there are some tongue twisters, except for this stone that accidentally fused the soul, Xin Yu has never seen the so-called xenomorph soul. However, in order to increase his persuasiveness, Xin Yu simply asked Shi to see how he answered.

"Hehe, boy, it seems that you are playing tricks on me?" Shishi's tone was a little playful, but he still answered Xin Yu's question, "I can tell you clearly, in the entire Xingyu, except for a few special populations, there are no other plants with souls at all.

"Moreover, even if a plant has a soul, it cannot exist for a long time under the scorching flames, so it cannot promote spiritual power at all. ”

Xin Yu shook his head, he was working backwards from the results of the "Condensing Pill", so he was very sure that there was an elixir that could act on the spirit, so he insisted and said: "I don't think that only the soul can have an effect on the spiritual power, there are thousands of rules in the world, and there is no absolute." Before you came across this stone, did you ever think that a dense stone could melt the soul?"

"So boy, what do you think is working on the star power, which is what you call the spiritual power? It can't be the so-called energy, right?" Probably because the soul of the stone was once constructed by the rules of fire, so he thought of fire energy as a thought, "If it's energy, don't you need to consider that it is harmful to the star power of the star magician?"

"Harmful?" Xin Yu thought for a moment before he understood what the stone meant by being harmful, or that the energy that the stone thought was that kind of violent and aggressive energy, "Okay, probably because you are too sensitive to fire, you will feel that the energy will definitely cause mental harm." In fact, there are many kinds of energy, and there must be a meek one if there is violence. After all, you have lived for more than 6 million years, and it is estimated that you will have millions of years after the soul is regularized, right? Since your own soul is made of fire rules, how can you not be harmed?"

The stone flew up and down twice, and then a very excited thought came out: "It turns out that I have thought wrong for millions of years......"

"Hey, hey. What are you talking about?" "Now it's Xin Yu's turn to not understand, what is this stinky stone talking about."

"Hehe, it's nothing, I always thought that it was because I was not afraid of ordinary flames after regularization, so I dared to enter the inside of the sun. Unexpectedly, it was because ......" Xiao Shi said halfway, and then stopped continuing the topic, "Hey...... It's all like this, and there's no point in thinking about it anymore. Well, I now think you have a point, energy can indeed act harmlessly on the soul......"

"At the moment, I just want to research something that can be used for mental power. Soul matters must be cautious at all times. Xin Yu shook his head, not as "ambitious" as the small stone.

"Hey, kid, don't you know that strengthening the soul can strengthen the spiritual power?" Xiao Shi's distraction shouted in Xin Yu's dantian, and he was very dissatisfied with Xin Yu's veto of him, "If it is to strengthen the soul, I have many methods, but if it is to find a Danfang that only targets spiritual power according to your ideas, I tell you, it is basically impossible." ”

Xin Yu was most annoyed by being told that it was "impossible", so he immediately complained: "I told you just now, we must be cautious about souls. In addition, please don't always say that it's impossible, I haven't researched the Qi Nourishing Pill before, do you think it's impossible?"

Xiao Shi thought for a while before saying, "For the study of the body, maybe the astral realm of your world is still at a low level, but in my original world, there will be no difficulty in casting an alchemy body at all. Therefore, although your elixir has reached the level of our world, countless astrologists in the high-level astral realm have studied the elixir for millions of years, and have not researched any elixir that has an effect on star power, why do you think you can do it?"

"No, I'd like to try it. It's not that Xin Yu is too stubborn, but Xiao Shi doesn't know that he actually has such a "Dan Fang" in his mind.

Yes, Xin Yu actually knew the Dan prescription of the Ning Shen Dan, in his previous life, he was able to recite the process documents of the assembly line elegantly, and the old Chinese medicine doctor's Ning Shen Dan Dan prescription was only a thousand words, and he couldn't remember anything.

It's just those so-called "condensing fruits" and other medicinal herbs, I don't know what they are called in this world. Of course, in his previous life, Xin Yu didn't know what the Condensing Fruit was, and he also didn't know what the medicinal properties of the Condensing Fruit were.

Because of this, Xin Yu had never thought about refining the Condensing Pill before, because he didn't know what medicinal materials he had, and it would be a considerable waste of time to test them indiscriminately.

"Is it okay for you now?" Since Xin Yu had not stopped the operation of his true qi, Xiao Shi suddenly heard Xin Yu's heart.

"Huh, can you peek into my mind?" Xin Yu asked excitedly. No one wants others to know what they think in their hearts, and Xin Yu is no exception, so after discovering this, he immediately prepared to gather the Three Flavors True Fire to refine this part of Xiao Shi's soul.

"Wait, wait, I don't know why I know what you're thinking, but it's definitely a good thing for you, isn't it?" Xiao Shi noticed Xin Yu's movements, and immediately said, "I was able to sense it just now, I really didn't lie to you, maybe it was because you were in high spirits at the time......"

"Excited? Hehe, I don't care if I'm excited or not, what I care about is, why do you say it's a good thing. Although Xin Yu didn't believe in the excuses of a person who wanted to "live", he still asked.

Xiao Shi said: "That's the case, that part of my soul should not be completely refined by you, so there will be a phenomenon that can communicate with me." Also, do you remember what I said, in your ...... When True Qi is running, it will bring a lot of information flowing, so I can use this method to communicate with you. And just now, you may have been in a state of excitement that caused what you thought to be spread to that part of your soul. ”

"Benefits, don't give me an analysis of how you know, what I want to know is, can you know what benefits are for me?" Xin Yu was a little angry, chirping crookedly for a long time, is it to delay time?

The part of the soul of the small stone in the dantian trembled and said, "You seem to have told me before that the method and the astral technique you practice are two systems, and it seems that your exercises can be directly converted into spiritual power with true qi, and you are stuck at this stage and cannot continue." Right?"

"Well, go on......" Xin Yu said impatiently.

"You think, your mind was born in the sea of stars, that is to say, true qi can bring your thoughts to the dantian, does that mean that true qi can also reach the sea of stars......?" Actually, that's what it's all about.

"Your consciousness is saying that my True Qi and Zhihai can actually communicate?" Xin Yu was a little excited, in comparison, he was still more accustomed to cultivating with the method of practicing qi, rather than using the method of visualization. Although he was interested in astronomy in his previous life, it does not mean that he will be interested in visualizing the starry sky...... It's just too difficult.

"That's true in certain situations, but I don't know what the specific situation is. However, if you keep that part of my soul, I can remind you the next time I can feel your thoughts, and perhaps, I can help you monitor the state of your cultivation in the future?" the little dragon man begged, "Besides, do you know that my soul power is running out anymore, you just want to wipe out my whole thing, do you still need to be afraid that I will spread your secrets everywhere?"