Lu Yu's domineering declaration made the four girls stunned.

However, he was also attracted by Lu Yu's domineering appearance, and his eyes showed a look of surprise and admiration.

"Why?"

Murong Xuan asked suspiciously.

"Because only an alchemist who uses Dan Fire Alchemy is a real alchemist. I believe that you have been studying alchemy for a long time, and you should be able to distinguish the finished products of the pills, and see how many finished products these pills are?"

Lu Yu took out a few jade bottles from his pocket, which contained beautifying pills and blood coagulation pills, the number was not much, there were just three beautifying pills, and there were more than a dozen blood condensing pills.

Murong Xuan obediently took the jade bottle, and the other three girls also came over curiously, although they didn't understand, but they knew that if they didn't understand, they could ask!

"It's all ten percent Dan?"

But there was no need for them to ask, after Murong Xuan checked the pill, he directly exclaimed.

"This is the elixir refined with the Danhuo, and this is the real elixir. Those so-called fifty Cheng Dan, sixty Cheng Dan, and even ** Cheng Dan, in my eyes, all belong to the existence of waste products, not ...... It can't be said that in my eyes, but in the eyes of all true alchemists, those are waste. ”

Lu Yu's tone was filled with even stronger disdain, which made Murong Xuan a little unacceptable for a while.

She has liked alchemy since she was a child, but unfortunately, she has never had the opportunity, and now she finally has the opportunity, and finally began to study formally, but she was suddenly hit hard by Lu Yu.

"So what should I do?"

Murong Xuan asked stupidly.

"Improve your strength, when you can condense the golden pill in your body, not only can your strength increase, but you can also summon the Dan fire, and when the time comes, if you want to refine the pill, it will be a matter of course. However, in normal times, it is also possible to know more about the basic techniques of alchemy. ”

Lu Yu sighed, now that Murong Xuan and the others already knew that they could do alchemy, if they didn't teach them the methods of being alchemists, they would probably hate themselves to death.

"Can't I have my strength now?"

For the first time, Murong Xuan revealed her true strength in front of everyone, and the fluctuations in the martial spirit realm already represented the phantom of the strength of this realm, which made the three girls all stunned.

Only Lu Yu already knew Murong Xuan's strength, so he didn't feel a little surprised.

"Xuanxuan, okay! It turns out that you have been hiding from me all along, and your strength is already a martial spirit, how can you be so powerful?"

Zhao Qianqian was the first to be dissatisfied, pouted, dragged Murong Xuan's arm, and said with annoyance.

"You didn't ask me, why should I say it!"

Murong Xuan smiled slightly, still said calmly.

And Ge Yu'er and Huang Yuechen, the two women, were still very surprised, their strength was stronger than Murong Xuan, but none of them discovered Murong Xuan's hidden strength, which made them feel ashamed in their hearts.

"You two don't have to be like this, don't say it's you, ordinary people want to discover her strength, at least they have to be a martial saint, or even higher, this little girl has a very peculiar set of concealment techniques!"

Lu Yu saw the current situation of Huang Yuechen and the two women, so he comforted her.

"Then how do you know? It seems that you only have the realm of martial spirits!"

Ge Yu'er muttered with red eyes.

"I've said it, ordinary people are like that, but am I an ordinary person?"

With a grin, Lu Yu responded narcissistically, his face turned and became a little serious:

"You all go and sit down on the sofa! The things I'm going to hand over to you next are not only useful to Murong Xuan, who has always wanted to become an alchemist, but also to the three of you...... Well, that's something I've only recently discovered. ”

In order to prevent accidents, Lu Yu had to add another sentence at the end.

The four girls seemed to know Lu Yu's thoughts, snorted coldly in unison, and then obediently sat down on the sofa.

"Have you ever heard of such a thing?"

Lu Yu's eyes were mainly on the faces of Huang Yuechen and Ge Yuer, he would not count on Zhao Qianqian and Murong Xuan, these two little girls definitely didn't know.

The facts are the same as Lu Yu's guess, not to mention Zhao Qianqian's two little girls, Huang Yuechen and Ge Yuer, two big women, who don't know anything about it.

"Okay, then I'll explain, you all know that in each of us, after cultivation, there will inevitably be the existence of aura, so under normal circumstances, where is aura?"

"Of course it's a sea of gas!"

The four girls said in unison.

"Yes, it's indeed a sea of qi, but if we compress the aura stored in the sea of qi, will their volume decrease? In this case, the concentration of the gas will definitely increase, causing its density to increase, so that the gaseous aura can be transformed into a liquid aura......"

"Xiao Yu, what is density, why does the gaseous aura turn into a liquid aura?"

Ge Yuer asked stupidly.

Lu Yu was stunned for a moment, and then remembered that this was not the earth, and there was no knowledge of science and physics at all, so he recalled the knowledge he learned at the beginning with a little headache, and used a very simple method to let the fourth girl understand these contents.

Fortunately, the four little girls are not ordinary people, their minds are also quite smart, and Lu Yu's explanation is quite vivid, so they can easily understand this knowledge.

Then, Lu Yu began to explain again, condensing the gaseous aura into a liquid aura, and then condensing the liquid aura into a solid aura, which is the so-called Jindan.

After hearing these things explained by Lu Yu, the four girls couldn't wait to try it, and sat cross-legged on the sofa in the living room.

They are all very smart, and now that they understand these things, they can naturally clearly imagine what kind of effect they can achieve if the aura in the sea of qi is transformed into a golden pill.

Lu Yu didn't know that this unintentional incident made the four women understand the knowledge of Jin Dan in advance, although it was said that the promotion of them for the time being was not particularly big, but later, when they were ready to comprehend the power of the law, the Jin Dan in their bodies helped them too much.

Seeing that the four women started to meditate and cultivate without caring about anything, Lu Yu had no choice but to set up a protective barrier beside them, and sat beside them all the time, guarding them, and his spiritual power kept an eye on the changes in the aura in the four women's bodies at any time, for fear of a little accident.

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