Third sister Dan Ling looked at Xu Fei's excited look, chuckled lightly, put on some clothes and left.

Soon I brought my two sisters over.

And the four sisters of the Dan family got together.

It really feels extraordinary.

The next day.

Xu Fei came to Alchemist Yujing.

Browse his collection over the years.

After checking more than ten volumes of the collection, Xu Fei had to admit that the other party's alchemy skills did have merit.

So read more carefully.

Another two months passed in the blink of an eye.

Xu Fei read through all the books on alchemy techniques copied by Alchemist Yujing.

He gained a lot.

Previously, Xu Fei used the five qi essence liquids condensed in the natural spirit gathering array as the main spiritual material to refine elixirs, but it could only reach the level of being helpful to people with a cultivation level of 300,000 pots.

But now Xu Fei is confident that he can refine enough elixirs for 320,000 pots, or even 330,000 pots of cultivation.

Of course, certain adjustments and changes are needed in terms of spiritual materials.

The cost is about three times what it was before.

Very expensive.

After all, Xu Fei used Five Qi Yuan Liquid to refine elixirs before. Even if the very rare Five Qi Yuan Liquid is not included, the price of other auxiliary spiritual materials alone, one elixir costs almost four million spirit stones!

Xu Fei usually takes two tablets a month.

That is a total of eight million spirit stones.

In more than two thousand years, Xu Fei's cultivation level increased from 250,000 pots to 300,000 pots. The expenses incurred were astonishing and shocking.

But now it has to increase again, three times more than before. Each pill requires tens of millions of spiritual stones and auxiliary spiritual materials.

The calculation is based on taking two pills per month.

Then it will cost more than 20 million spiritual stones every month!

Although Xu Fei now has a lot of income, he also feels a little struggling.

Therefore, if possible, we should continue to adjust and reduce costs.

After checking Master Yujing's collection, Xu Fei put the books in his hands back to their original places.

After thinking for a while, I came to Master Yujing's retreat.

Although Alchemist Yujing would not disturb even his daughter when he was in seclusion, Xu Fei was still a bit thin-faced in comparison.

Alchemist Yujing, who was writing about calculations, noticed Xu Fei coming over and chuckled.

"What's the matter with Mr. Xu?" Alchemist Yujing asked.

"I'm bored and want to play chess with my husband." Xu Fei said.

Although Xu Fei said this, Master Yujing also understood what the other party was probably up to.

However, he also took out the chessboard and started playing chess with Xu Fei.

After losing a few points one after another, Xu Fei couldn't help but wonder: "Sir, your alchemy refining skills are very good, why didn't you continue to refine elixirs later?"

The last part of Master Yujing’s notes was written many years ago.

That's why Xu Fei judged that Master Yujing had not refined elixirs for a long time based on this.

Hearing this, Master Yujing said, "Sir, have you read my notes?"

Xu Fei nodded.

"Sir, your skills are extraordinary." Xu Fei praised.

Self-aware, Xu Fei knew that he was able to possess many of his current superb skills only because of plug-ins.

If there were no plug-ins, I'm afraid he would have turned into a pile of loess somewhere by now.

Hearing Xu Fei's praise, Master Yujing could not help but look proud.

However, he quickly regained his composure.

After experiencing a long period of time, Master Yujing did not become indifferent and unmoved, but was able to quickly regain his composure, just like falling into an ancient well with stones.

This also made Xu Fei quite envious.

I don’t know when I could feel like this.

"Thank you for the compliment, fellow Taoist." After saying that, Alchemist Yujing stood up and took Xu Fei to the desk where he had been writing and drawing.

"These are the things I have been studying since I stopped refining elixirs." Alchemist Yujing said.

Xu Fei picked up some messy drafts.

It was also thanks to his writing skill that he had already reached level 49, otherwise he might not be able to see what he was writing.

However, after checking for a moment, Xu Fei's face showed doubts.

Because he can't understand!

There is something he can't understand? !

One thing is that Xu Fei learned a variety of knowledge and skills by relying on plug-ins.

He can be called a generalist and an all-rounder.

There was rarely anything he couldn't understand.

However, after picking up other manuscript papers and looking at them for a while, Xu Fei probably figured out something.

Master Yujing seems to be calculating the geography of mountains and rivers?

But what's the use?

Do you want to fight?

But even if we fight a war, it is enough to conduct an on-site survey. How can we calculate it?

"Sir, are you calculating geography?" Xu Fei said.

Hearing this, Alchemist Yujing chuckled and said, "Not entirely."

As he spoke, he took out many manuscripts and asked Xu Fei to check them.

Xu Fei took these manuscripts and read them quickly.

The weather, geography, four seasons, and even the reproduction and growth of some animals and plants were all used by Master Yujing to make calculations.

However, as he looked at Alchemist Yujing's manuscript, Xu Fei vaguely saw something.

After all, Xu Fei has browsed various collections of Linglong Immortal Sect and learned thousands of skills, which is enough to be said to be knowledgeable.

After learning more about the situation, it is naturally impossible to discover nothing.

But Xu Fei was speechless about what he discovered.

Because through these manuscripts, Xu Fei felt that Master Yujing was calculating the rules of inspiration!

Ingenuity is the creation of heaven and earth.

From what Xu Fei knows so far, when the earth's energy rises, is illuminated by the sun, and then matches the energy generated by the plants, it is an inspiration.

In addition, there are more than ten other ways to form and nurture spirituality.

It's just that Xu Fei didn't delve into this in the past.

But I didn’t expect that Alchemist Yujing would study this very deeply.

"Sir, are you looking for the law of inspiration?" Xu Fei asked again.

"Not entirely." Alchemist Yujing chuckled again.

This made Xu Fei scratch his head a little.

What is the old man doing? !

Master Yujing looked at Xu Fei who seemed very interested in this and thought for a moment.

"I'm calculating how long it will take before the spirit machine disappears from the manifest world." Master Yujing said.

These words were as shocking as a bolt of lightning struck his head.

Xu Fei was immediately stunned.

The inspiration...disappeared?

Master Yujing Dan took the manuscript from Xu Fei, sorted it out and put it back into the storage box.

Xu Fei took two deep breaths, calmed his mind, and looked at Alchemist Yujing.

This person actually said that the spiritual power would disappear?

Although it seems incredible at first, just like hearing that oxygen would disappear in a previous life, when you think about it carefully, it is not completely impossible.

After all, spiritual intelligence is created by the earth's energy, and not many people know how the earth's energy is generated.

"I would like to hear the details." Xu Fei said.

When I heard that Xu Fei didn't angrily reprimand what he said as ridiculous.

Alchemist Yujing could not help but reveal a heartfelt smile.

"If we want to talk about this matter, we have to start from more than 40,000 years ago. I wonder if Mr. Xu has the patience?" Alchemist Yujing said. (End of chapter)

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