After making the previous moves, Cao Yu did not start directly, but checked the medicinal materials in the storage ring given by the purple-robed alchemist one by one.

When he saw the herbs, Cao Yu stood in place and frowned slightly, and did not speak.

The two venerable alchemists saw Cao Yu frowning, and the things they were looking at were still the medicinal materials they gave, and they suddenly wondered in their hearts, could it be that there was something wrong with the medicinal materials?

"Little friend, is there anything wrong with the medicinal herbs?"

One of the purple-robed alchemists asked out loud.

"Elder, this medicinal material is not right, it has a great impact on the refining of Yuanyang Dan."

He bowed slightly, bowed, and then pointed to the medicinal herbs in his hand and said.

The purple-robed old man did not refute immediately, which was naturally quite appreciative of Cao Yu's previous carefulness.

"Oh, this possibility is very small, we all have professional alchemists who strictly screen medicinal materials, and it is basically impossible for the medicinal materials to be mistaken, so let's hear what is wrong."

explained it, but I didn't really believe what Cao Yu said.

"Elder, look, this sun grass, I don't know if the elders know its habits, if it is under the sun, all its leaves open to absorb sunlight, and in a shady place, it will curl up to reduce the loss of medicinal properties."

As he spoke, Cao Yu picked up the herb and handed it to the purple-robed elder.

"This herb is no different from what you said, why don't you say it!"

Another purple-robed alchemist who had been silent for a long time asked out loud, feeling that Cao Yu was making a big fuss.

"Elder, don't worry, the situation I just talked about is that it is still planted in the soil, but now it has been unearthed, so this herb is now in a dead state, if it is a real sun grass, it will always remain curled up, not the current situation of stretching out!"

Cao Yu explained with a smile on his face, he absorbed so much knowledge, coupled with the inheritance of Tianxuanzi, he still knew this knowledge well.

Hearing Cao Yu say this, the two elders thought about it, and it was indeed as he said.

"This... ”

The two of them were a little embarrassed for a while, and indeed what Cao Yu said was true, this kind of grass was similar in appearance to the sun grass, and if it was an inattentive alchemist, it would be easy to ignore them.

"This grass is very similar to the sun grass, called the Taiyin grass, and its habit is the opposite of the sun grass, curling up in the sun, and stretching out to absorb the yin qi in the dark places!

Cao Yu continued to explain, the faces of the two elders were already a little ugly, they were the assessment elders of Danta, and these things were not confirmed to be responsible for the corresponding responsibility, although they may not be the ones who selected the materials, but they were the final gatekeepers and the defenders of Danta's reputation.

"Someone! Call me the person who picks the materials!"

One of the purple-robed alchemists with a fat face roared, and suddenly a woman who looked like a maid outside the door came in.

"My lord, Lu Danshi has been out recently, and this batch of materials was selected by Wanzhu!"

The woman said in horror, because some maids have been next to the alchemist all the year round, their ears and eyes are rendering, and they also have some experience in some medicinal materials, and the lazy alchemist will hand over these trivial things to the maids to do, and finally they will pick some key materials to check.

"What nonsense, do you really regard this place as a vegetable market? and let a maid select the materials for the assessment, Lu Xiao, this kid is comfortable enough to live a comfortable life, it seems that he has to take care of it, go and get a sun grass first, the alchemy here is urgent!"

The purple-robed Danshi trembled with anger, their signboard was smashed this time, but fortunately, only Cao Yu was present.

"Little friend, this sun grass will be replaced for you immediately, do you want to take a look at other medicinal herbs?"

This time the words became much more polite, and the purple-robed Dan Master said with a smile.

He was really afraid that Cao Yu would poke this matter out, a big force like Danta, the reputation issue is very close, if it is known by the above, he may have to be punished.

"Good!"

Cao Yu didn't continue to delve into it, these were family affairs within Danta, and he just wanted to use Danta to make it easier.

After checking the materials one by one again, those medicinal materials were divided into two piles by Cao Yu, one of which accounted for the vast majority, and the other pile, not much, but there were also three or four plants.

This situation fell in the eyes of the two purple-robed alchemists, and their faces immediately turned green, and it was obvious that they knew that Cao Yu could not just divide them into two piles if he was fine.

"Huh. . . Little friend, is there anything wrong with these medicinal herbs?"

Asked with some trembling, the two alchemists had already drenched the blood of the maid who selected the medicinal herbs in their hearts.

"Oh, it's not a big problem, these three, two of them don't match the year, but they don't affect much, but they test the alchemy level of the alchemist"

"What about the other one!"

Looking at it with a blank face, the purple-robed Dan Master has already predicted, and there must be something big wrong with the other one.

"This herb is also wrong"

Cao Yu said bluntly and handed it to the purple-robed alchemist with a smile.

He didn't say anything, his intention was obvious, let the alchemist who was assessing it find out the problem himself.

"Xiaoyou is really discerning, this is the old man's dereliction of duty, don't worry, we will give Xiaoyou an explanation! I said strangely, why most of the people have failed in the assessment recently!"

I saw that the medicinal herbs in my hand were indeed similar in appearance, but they were not.

"It's okay, I just need to pass the assessment, and the rest of the elders can watch and deal with it internally!"

In line with the principle of non-mixing, Cao Yu had an indifferent expression.

This behavior fell in the eyes of the two venerable alchemists, and they felt very satisfied, and they admired Cao Yu even more.

"Little friend, wait a minute, the medicinal herbs will be replaced for you soon!"

The slightly chubby purple-robed alchemist directly picked up the three or four flavored medicinal herbs that Cao Yu had picked out, and strode out.

Soon, he re-selected new medicinal materials and handed them to Cao Yu.

Cao Yu didn't even look at it, and directly took it and put it together with the medicinal materials corresponding to that kind of pill.

This small detail fell in the eyes of the two assessment Dan masters, and the two of them smiled at each other, and their eyes were more pleasing to the eye when they looked at Cao Yu.

This is obviously a great trust in them, and they haven't checked anymore, if they continue to check, then they can't even be trusted!

After all the preparations are completed, the next step is to start the official alchemy.

The thick true element is injected to preheat the Dan furnace, and Cao Yu still has the usual big pot stew style.

Throwing them all in directly, this act made the eyes of the two old men open in fright, although what Cao Yu did before was in line with the qualities that a venerable alchemist should have.

But this immediately knocked him into the ranks of laymen! They had never seen anyone do such alchemy.

"Little friend, you... Hey!"

The two purple-robed alchemists had already given up hope directly on Cao Yu, and their favor just now was completely lost in an instant.

"Elder, don't worry, just watch!"

Cao Yu knew that his behavior must be a little shocking to the world, what he wanted was this effect, if it was a mediocre assessment, I am afraid it would not be able to attract the attention of high-level figures.

After speaking, he ignored the two assessment pill masters, and devoted himself to alchemy.

Thanks to the Chaos Library's ability to detect shortcomings and errors, many of his previous methods have been improved.

"The Holy Hand of Herbs!"

The law decision in Cao Yu's hand was constantly changing, one hand was on the Dan furnace injected into the true yuan opening, and the other hand was constantly entering the law decision.

With the entry of those magic decisions, the hundreds of medicinal materials inside were separated one by one by the magic tricks to help his soul, and each medicinal material was refining in its own way, because the temperature and duration of refining different medicinal materials were different, so the difficulty of Cao Yu's refining of the honorable-grade pill was stronger than the previous emperor-level pill, which required stronger soul power and more skilled control.

From the outside, the color of each area around the Nadan furnace is different, which is obviously caused by the different temperatures in different areas inside.

This phenomenon was seen in the eyes of the two assessment Dan masters, and they were extremely shocked in their hearts, there were people who could control the temperature of each area in the Dan furnace was different.

This is also incredible!

Cao Yu had been simulated in theory before, and he had never actually refined a pill above the honorable level, although he was a little rusty for the first time, he was not flustered, in the final analysis, it was just that the number of medicinal materials had increased.

In essence, the process has not changed much, and his soul power and strength have increased a lot, but it doesn't seem to be difficult.

Half an hour later, all the impurities were refined and eliminated, at this moment there were more than a hundred groups of medicinal liquids in the Dan furnace, with different colors, each of which was refined to the extreme, Cao Yu's method was actually not much different from the refining of a single medicinal material, but the advantage was that his refining was at the same time, the loss of medicinal power in this way could be minimized, and the effect of the pill was also the best!

"Hey!"

With a low snort and full dedication, more than a hundred groups of medicinal liquid began to slowly approach.

But in this process, if there is a person with a strong soul who passes through the Dan furnace, it can be seen that the order of fusion of the medicinal liquid is very particular.

Although to a certain extent, this kind of pill has been developed with the fusion of all the medicinal liquids in mind, and there will be no violent reactions, or toxicity or anything.

However, the different fusion sequences can indeed make a huge difference in the quality of the elixir.

This is also the reason why high-quality pills are expensive.

It was because very few people could study and master the corresponding fusion technique in that kind of fusion order, so some alchemists who could refine high-quality pills were very popular wherever they went.

In particular, some dignitaries are especially fond of this kind of good thing!

Cao Yu fused in an orderly manner according to the order of fusion analyzed by the Chaos Library, and after a stick of incense, all the fusions were completed, and at this moment, an extremely rich Dan incense had begun to emerge from the Dan furnace.

"This danxiang. ”

The two purple-robed alchemists who wanted to watch a good show glanced at each other, and they both saw extremely surprised looks in each other's eyes.

couldn't help but smile bitterly, they had already admitted that they had looked away, and there was also a self-deprecating look in their eyes, lamenting their loneliness.

The stronger the incense, the higher the quality of the elixir!

They were very much looking forward to what quality this refined elixir could achieve!

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