Du Fan lowered his eyebrows, did not dare to look directly at this woman again, swallowed a mouthful of saliva, brewed a little in his heart, and said respectfully:

"Senior Xiao, in fact, the essence of refining essential oils and refining pills is the same, both of them put forward the medicinal properties of spiritual herbs, and after a series of complex processes such as condensation and transformation, they are finally transformed into what cultivators need.

The younger generation doesn't know much about the art of alchemy, so they only say that this bottle of refining essential oil is a bottle.

The younger generation first used a special method to extract the most essential part of these spiritual herbs according to the ingredients recorded in the Danfang, because these essences are in a liquid state, so I call them juice essences.

Next, according to the proportion mentioned in the Danfang, I blended and dissolved those juice essences according to different amounts, and finally prepared this bottle of Qi refining essential oil. ”

The woman in yellow had been listening quietly, although her face remained unchanged, but her beautiful eyes flashed with strange light from time to time, and her heart was already extremely shocked.

"I probably understand what you mean, I didn't expect you to understand the principles of refining pills so thoroughly at such a young age, and you also came up with a whimsical way to create a path that no one in the cultivation realm has tried for thousands of years, which is really commendable. ”

The woman in yellow looked at Du Fan with a much calmer gaze, and there was already a look of appreciation in her nod.

But the next moment, the woman suddenly had a smile, blooming on her slightly cold face, as amazing as spring and snow, but in this heart-pounding smile, there was a hint of warning, and she said softly:

"However, I don't care if you intentionally or not, now I'll give you another chance.

First, how did you extract the so-called juice essence, and second, how did you manage to fuse the different attributes, even the mutually exclusive juice essences, together?"

Du Fan was naturally shocked when he heard this, just now he did deliberately avoid talking about the key points, and he never thought that the woman opposite was also very familiar with the way of plants and trees, and he explained the mystery in one word.

This made him feel shocked, and suddenly put away the superiority of the scientists in his previous life, and became dignified and abnormal, it seems that in front of this woman, if he can't say words that satisfy the other party, he may not be able to pass the test.

Du Fan thought of this and sighed in his heart.

The next moment, his fingers suddenly moved, and he took out the set of chemical instruments from the Qiankun Ring, and then, under the stunned eyes of the woman in yellow, the scattered parts of the set of instruments were quickly connected to each other.

Only then did he get up with a light breath and said:

"This set of things, the younger generation calls it a chemical instrument, whether it is the extraction of the essence of the juice, or the preparation of the essential oil of the elixir, it is all done by relying on it, if the seniors are interested, the younger generations are willing to describe it in detail for the seniors, it is like this......"

Next, Du Fan described the role of the equipment, simple chemical principles, and chemical reactions one by one, and the woman in yellow who listened directly was dumbfounded, and her eyes were full of incredulity.

It wasn't until half an hour later that Du Fan spoke, and at this time he had already roughly explained the entire process and related principles of refining the essential oil of the elixir.

Of course, Du Fan skillfully ignored the gluttonous hairs of the ten thousand eyes, and the things related to the ripening powder, catalyst and other things were also vague.

Fortunately, the woman in yellow seemed to be shocked and thoughtful, and did not hear the ambiguity, which made Du Fan breathe a sigh of relief.

The woman in yellow did not speak immediately, but groaned with her hand on her cheeks.

After a while, her eyes flashed over the so-called chemical instruments, and finally her eyes turned around, her eyes fell on Du Fan, and she said slowly:

"I don't know how you came up with these things, to be honest, I don't really understand the chemistry and the preparation process you just mentioned, but my gut tells me that these are achievable.

However, listening to what you mean, with your current means, you can't refine high-grade elixir essential oil, what's going on?"

"Looking back at the predecessors, this set of chemical equipment can only refine the juice essence of ten years of spirit herbs at most, and the years of spirit herbs required for high-grade pills are much higher than ten years, so it is not possible to formulate high-grade pill essential oils now. ”

Du Fan did not hesitate at all when he heard this, and immediately replied, looking very respectful.

"Why?" the woman in yellow raised her eyebrows.

"Because the extraction of the essence of the juice in the spirit herbs requires a certain high temperature, and the older the spirit herbs, the higher the temperature required.

The problem is here, once the temperature reaches a certain height, this set of chemical instruments will not be able to withstand it, and it will melt and collapse instantly, which can be regarded as a hardware barrier. ”

For this, Du Fan is telling the truth, and it is also a bottleneck that he cannot solve in the experiment.

"Okay, I see what you mean, if I can solve this problem for you, can you refine a high-grade elixir essential oil?" said the woman in yellow, frowning slightly.

"Theoretically, it is possible, but the specific situation will have to be tested, after all, what kind of temperature and how many years of spiritual herbs are suitable for refining are all necessary to determine after countless attempts.

Temperature is only one of the issues, there are other problems. Du Fan pondered for a while and said cautiously.

"Okay, let's talk about this matter for the time being, I will ask you directly, can you train a group of apprentices for my Seven Star Business Alliance, so that they can refine the essential oil of the elixir like you?"

The woman in yellow's gaze suddenly became deep, as if she could see through everything in the world, and at this time she was staring at Du Fan with this gaze, which made Du Fan's heart instantly chill.

"If it's just refining qi essential oils, I believe that it will take a year and a half to teach a group of people, but the more advanced elixir essential oils are also being studied by the younger generations, so I'm afraid they can't meet the standards expected by the seniors. ”

Du Fan was a little hairy by the woman's gaze, he knew that this was the main purpose of the other party, but he had already expected this matter, so he answered unhurriedly at this time.

"What you said also makes some sense, the matter of training apprentices is put aside for the time being, in the future, you will research and refine the elixir essential oil for my Seven Star Business Alliance, until you can refine the essential oil of the Yuan Infant level.

At that time, you will train another hundred apprentices for my Seven Star Business Alliance, and after that, you can choose whether to regain your freedom.

Of course, it will not let you refine it in vain, and for every bottle of essential oil you refine for this alliance, the business alliance will give you the corresponding spirit stone, which can be regarded as a purchase.

In this way, you will later draw the form and style of the chemical instruments required for refining the essential oil of the elixir on a drawing, and at the same time write down the requirements for the selection of materials, and the refiner of this alliance will be responsible for making it for you, do you need to add anything else?"

The woman in yellow nodded, thought about it for a while, and then said so, her words were very calm, but with no doubt.

When Du Fan heard this, he couldn't help but suffocate his breath, and secretly thought in his heart: "Restore the free body? So, I won't be a free body in the future?"

He really wanted to shout hoarsely: "When did Lao Tzu promise you!"

However, even if he was wronged, he could only bury it in his heart, and he would never dare to say this.

"The younger generation also needs an instrument that can adjust the temperature of the fire. Du Fan had no choice but to put his mind back on refining the essential oil of the elixir, and after a long silence, he spoke.

"No problem, what else?" said the woman in yellow without hesitation.

"That's all for now, if I have problems in the future, I'll bring it up again.

It's just that the juniors still have a question, I don't know if to talk about it?" Du Fan said with some hesitation.

"But it doesn't hurt to say it!" the woman in yellow glanced at Du Fan and said lightly.

"Ahem...... I don't know what role the juniors will be here in the Seven Star Business Alliance in the future, workers?" Du Fan coughed lightly and asked cautiously.

"Worker, do you mean a squire or a slave, hehe, you little guy has been worried about this, of course not, I have already explained in the letterhead that the Seven Star Business Alliance and you are a cooperative relationship, not a slave.

I heard that Master Mo once gave you a membership tag of this alliance, so now you can give it to me. The woman in yellow smiled and said.

Du Fan smiled awkwardly, and naturally handed over the blue sign to Vice Alliance Leader Xiao without any opinion.

The woman in yellow put it away, and at the same time, with a shake of her jade hand, she took out another brand and threw it to Du Fan.

Du Fan looked suspicious, picked it up, and looked at it carefully.

Only then did I find that this brand was similar to the previous one, the style and texture were almost the same, the same light blue color, one of which was inscribed with seven stars arranged according to the Big Dipper, but the word "member" on the other side was replaced by "worship".

"There are some special rules in this alliance, you can't accept outsiders as elders at will, so you can only be given an enshrined status, but except for some special permissions, the treatment enjoyed by enshriners in the alliance is the same as that of other elders.

As a worship of the Seven Star Business Alliance, there will be a set of high-level caves with extremely dense aura in the General Alliance, and you can use the small and medium-sized teleportation arrays in the Alliance for free, and you can buy things at the lowest price in all the shops under the Seven Star Business Alliance.

Moreover, you can hold the offering token every month in the future, go to the worship hall in the alliance to receive a certain number of pills and spirit stones, and you can also receive a medium-grade magic weapon at one time.

Of course, you can't use the magic weapon yet, and it's up to you when you want to get it.

There are other treatments, you just have to go to the worship hall and ask about it. The woman in yellow said something that made Du Fan stunned, but she didn't say anything, looking at him with a smile, and after a while, the woman asked:

"Are you satisfied with this arrangement?"