"If I want to eat a Ten Perfection Tonic Pill and know all its formulas, then I must have eaten it before, or I know the smell of all the medicinal materials of this Ten Perfection Tonic Pill well, to the point that I can easily distinguish it by just smelling the medicinal gas!"

Xu Yi thought back to the prescription of the Ten Perfection Great Tonic Pills, and shook his head slightly in his heart.

"Some of the medicinal materials in this prescription are relatively biased, and if I want to reverse the complete prescription, I am afraid that I have to try and understand a large number of medicinal materials to be able to do it."

Not to mention the cost of purchasing these medicinal materials, the time it takes to understand so many medicinal materials alone is not a small number.

To understand a medicinal herb, you not only need to eat it and know what it tastes like, but also know its appearance, smell, habits, medicinal properties, vintage, growth environment, and so on.

All these are calculated, even if Xu Yi has a memory palace and can never forget it, it will take several months to understand all the medicinal materials.

This obviously does not meet Xu Yi's own needs.

After a slight pause, he thought again.

"However, this knowledge of medicinal materials is still very useful, if I can fill all the knowledge of medicinal materials into the memory palace, then no matter what tonic and poison I face in the future, I can easily crack the formula!"

Walking the rivers and lakes, in addition to martial arts, there is another thing that makes people the most frightened, that is, poison!

If it can be used properly, an ordinary person can even kill a first-class martial artist with the poison in his hand.

Xu Yi was also most worried about this aspect before, if he could understand the formulas of all poisons, as long as he understood certain medical principles, he would no longer be afraid of these poisons.

It's decided!

Tomorrow, no, I'll buy a batch of herbs and try it later!

Anyway, he will be refining the Ten Perfection Great Tonic Pills here for the next day and night, and there is also a shopkeeper Chen who is familiar with various medicinal materials next to him, wouldn't it be too wasteful if he didn't borrow it?

"That's right."

Xu Yi seemed to think of something, and asked the shopkeeper Chen.

"Shopkeeper Chen, do you have any other years of ginseng here? I'm going to change the year of this batch of ginseng to 15 to 24 years, which corresponds to exactly one furnace per year. ”

"Well, ginseng is there. But if it is changed like this, it will have a great impact on the refining of the Ten Great Tonic Pills. If there is a difference of about one year, it is easy to say, but if there is a difference of two or three years, or even four or five years, the difference is much bigger! ”

"What does it matter? According to the difference in medicinal power, wouldn't it be possible to reduce the other medicinal materials by a part accordingly? ”

Xu Yi said casually.

Shopkeeper Chen smiled bitterly when he heard this.

"Young Master Xu, this alchemy doesn't mean that the main medicine is smiling for years, and then reduce the medicinal power of the dispensing, it involves a very complex medicinal power fusion process, and every alchemy must be put into it in strict accordance with the corresponding measurement, if it is a little less, this furnace of elixir may be wasted!"

He tried hard to persuade Xu Yi not to make those useless attempts.

Of course, he saw Xu Yi's thoughts, and he just wanted to try to see if it was possible to improve the Ten Perfection Great Tonic Pills.

But this prescription was made by his ancestors after I don't know how many years of painstaking research, how can you improve it by just tidying it up?

It can only be said that young people are high-spirited!

Shopkeeper Chen didn't care how much Xu Yi lost in the end, but he was worried that Xu Yi would end up angry with him!

In order not to be affected by the Xu family's anger in the future, he could only try his best to persuade him.

Xu Yi was noncommittal when he heard this, but just asked a question that seemed unrelated.

"Shopkeeper Chen, if you refine a furnace of Dan, how much does it usually become a Dan?"

"Huh? This number of Cheng Dan is not necessarily, sometimes if you are lucky, you can become nine Dan, sometimes you are unlucky, you may become six or even five, generally speaking, Cheng Dan seven is relatively normal. ”

"Seven Cheng Dan? These are six hundred denarii of silver. ”

“······”

Shopkeeper Chen looked at the six hundred taels of silver tickets in his hand, and was a little silent for a while.

One furnace becomes seven pieces, and ten furnaces are seventy, according to the price of eight taels of silver, that is, five hundred and sixty taels.

People directly threw six hundred taels of silver into his hands, what else could he say?

"I'll go and prepare the corresponding medicinal herbs immediately!"

Shopkeeper Chen turned around directly and went to make a new prescription.

Anyway, he has done his part and told all the disadvantages of doing this, even if Xu Yi loses a lot of money because of it in the future, it will not be blamed on him.

As the shopkeeper of Bai'ankang Pharmacy, although he is not a professional doctor, the shopkeeper Chen still has some ability, and after a while, he will match the new prescription according to the corresponding ratio.

"Young Master Xu, the medicine is all ready, can you start?"

Shopkeeper Chen looked at Xu Yi, and then at the few people behind him, as if asking the question 'Who is going to learn'.

Xu Yi did not reply to Shopkeeper Chen's question, but said lightly.

"Let's get started."

Shopkeeper Chen had doubts, but since the 'gold master' had already spoken, he naturally had no choice but to do so.

"Then I'll get started······ Young Master Xu, when refining medicine, the main thing to pay attention to is three parts, one is the amount and collocation of medicinal materials, the second is the control of the heat, and the third is the grasp of the timing······"

Maybe it was because he had a good intention, or maybe the money given by Xu Yi was very good, in short, Shopkeeper Chen explained it very seriously.

Xu Yi listened very seriously, and asked a lot of questions from time to time, basically all of which were bloody questions.

Shopkeeper Chen was secretly shocked when he heard this, if it weren't for the fact that there were a few questions that were very basic, but anyone who had been in contact with medical skills knew it, he almost thought that Xu Yi had studied medicine, and it was not at that level.

Really, even an apprentice who has been studying with him for several years may not be able to ask some of these questions – it's so pertinent!

Maybe it's talent! ’

Shopkeeper Chen said secretly in his heart, and at the same time taught more seriously.

If you don't take it seriously, you can't do

As for some of the questions raised by Xu Yi, especially the latter ones, if he doesn't deal with them seriously, he may not be able to answer them.

Wrong!

I can't answer it anymore!

"This, this ······"

Shopkeeper Chen listened to the last question given by Xu Yi, and the only medical knowledge in his mind turned wildly, but he couldn't think of how to answer it, so he could only say helplessly.

"I'm sorry, Young Master Xu, your question is beyond my ability, and I really can't answer it."

He was ashamed, as a person studying medicine, in less than half an hour, he was asked by a person who had never been in contact with medical skills and couldn't answer, how could he accept this?

Xu Yi shook his head slightly.

"Then forget it."

"Thank you Young Master Xu for your understanding!"

Shopkeeper Chen breathed a sigh of relief.

But at this moment, Xu Yi took out a medicinal herb.

"Shopkeeper Chen, can you tell me about these medicinal herbs? I'm interested. ”

Chen shopkeeper: ???

This is an additional price!!