Xu Yi stayed in the Dan room for an hour and a half before returning to his courtyard.

In this hour and a half, Lu Fang can be said to have taught him everything. Of course, all the knowledge was only limited to the elixir of the Qi Strengthening Pill.

The first thing a normal alchemist needs to do before they come into contact with the Dan Furnace is to go to the medicine garden to study, and they need to master a lot of knowledge, including how to identify herbs, distinguish the medicinal effects and quality of herbs, and know the problem of mutual restraint between medicines.

All of this takes a lot of time to complete, and it can even be a backlog of normal people's cultivation time.

However, Lu Fang and Xu Yi didn't care, they taught one by one, and limited all their knowledge to seven medicines.

According to Lu Fang, the simplest pill of Zhuang Qi Pill actually has three different methods of refining medicine. They correspond to seven drugs, ten drugs, and twelve drugs, respectively.

Different drugs have different proportions, and the biggest difference is the price and difficulty of refining.

Using seven kinds of medicine to refine the Qi Strengthening Pill was undoubtedly the easiest, but its cost was the most expensive, and the cost of medicinal materials alone required eighty taels of silver. Although there are three more of the ten medicines, the cost is thirty taels cheaper, and as for the twelve medicines, the cost has dropped to a mere thirty taels.

Nine times out of ten, true alchemists will choose the most basic pill like the Zhuangqi Pill to start with, and their refining methods are also from less to more, from easy to difficult. However, once they have mastered it thoroughly, most of them will choose twelve kinds of medicines in their daily refining.

It's all because of the relationship between cost and selling price.

The finished pills in the Qiaoqi Pavilion are extremely expensive, a bottle of low-grade aphrodisiac pills is worth thirty taels of silver, a bottle of medium-grade aphrodisiac pills is worth one gold, a bottle of high-grade aphrodisiac pills is worth three gold, and the top-grade aphrodisiac pill has reached the terrifying point of one worth three gold.

Moreover, the best drugs are available but not available, and there is generally no need to count on them. On the contrary, although the high-grade pills are scarce, as long as they can pay a sufficient price, they can still maintain the supply.

As long as the alchemist has some achievements, the speed of making money is extremely fast, even if it is the cost of eighty taels of silver for seven medicines, as long as the refining is successful and the quality reaches the middle grade, then a furnace of pills will also be profitable. In case there is a top-grade or superlative, it will make a lot of money.

However, since the Zhuangqi Pill was the most basic pill, the supply was huge, and for cost reasons, the vast majority of junior alchemists would still choose twelve kinds of medicine to refine.

But at this moment, Xu Yi only learned the simplest but most expensive seven medicinal herb refining methods, and he only learned the steps of how to exercise and various precautions. As for how to pick and preserve medicinal herbs, it is completely ignored.

But even so, when Xu Yi left the Danfang, he felt dizzy.

In a short period of time, he received a lot of new knowledge, and he witnessed Lu Fang refining three furnaces of pills one after another, and he would have a feeling of being unbearable for anyone.

When he returned to the courtyard, he could see the benefits of Xu Yi deliberately choosing the most remote place, and there was no figure near the courtyard at all. And Xu Yi will not slack off, take out the notes and continue reading, and add a few words from time to time to make his impression even more profound.

It didn't take long for someone to send the Dan furnace and medicinal materials, and the person who sent it was a steward of the treasury, and the Dan furnace was borrowed by the sect, but the three medicinal materials were charged by Xu Yi for the cost of two gold.

That's right, the market price is two gold and forty silver, but the price given by the sect to the alchemist is two gold, which can be regarded as a small surprise.

Along with the Dan furnace, there was also a large amount of Dan coal, which was a special fuel, which was not the same as the briquettes that Xu Yi had seen on the Blue Star. This kind of fuel is specially used to refine pills or forge weapons, and it is sold at a high price, but as long as you have the identity of a disciple of the Skillful Weapon Sect, then the sect will supply it for free.

The depth of the thousands of years of Damen Sect shocked Xu Yi again, but it made him extremely happy.

Closing the book, Xu Yi did not directly alchemize, but took a superb aphrodisiac pill, and then ran the true qi to complete a big Zhou Tian transport. When this time the True Qi was finished, his spirit and spirit suddenly returned to its peak state.

Although cultivation is an extremely boring thing, it is also very enjoyable when it comes to running the true qi. Especially in the case of taking the best elixir, it becomes more and more obsessive.

After a big week, Xu Yi's head was no longer dizzy, and his body was no less, as if he had slept for three days and three nights.

He put the Dan furnace in the back room, and estimated that the Dan coal would be sent into the iron frame at the bottom of the furnace. There is an outlet here that can adjust the amount of firepower, but refining the basic elixir generally does not require much adjustment, as long as it maintains a certain temperature from beginning to end.

After taking out the seven pills and putting them away, and reviewing the notes again, Xu Yi officially started his first alchemy.

These medicinal materials have already been processed, but they still have to be processed for the last time before the official alchemy. Whether it is soaked in water, or chopped, or mixed, this preparation alone takes half an hour.

Alchemy, really put the medicinal materials into the Dan furnace, until the finished product actually does not consume too long time, but the preparation work in advance takes up more time.

This is equivalent to an exam, an hour of answering questions, but it takes years or more than ten years to study. It's also like cooking, the time it takes to actually put it into the pot for seasoning is not long, but the time to prepare the ingredients in advance is the real big one.

Lu Fang started from the hot furnace and put the first pill, and then to the finished pill, not even a quarter of an hour.

In that hour, he spent most of the hour preparing the herbs of the three furnaces of pills, as well as explaining the key points to Xu Yi, and the time to actually refine the three furnaces of pills was actually only about two quarters of an hour.

Now, it took Xu Yi a whole hour to finish the prelude work of a medicinal material.

He looked at the fragments of the ground to make sure that he didn't have any mistakes, and then directly activated his divine powers, directly expanding the seven processed herbs by three times.

After doing all this, he even had a feeling of being out of breath. But it's all worth it, because it saves him a lot of time.

Gathering his mind, Xu Yi took a superb aphrodisiac pill, and after a quarter of an hour of cultivation, his spirit was overflowing again.

Opening his eyes, Xu Yi lit the Dan coal and began to throw herbs into the Dan furnace step by step.

Half an hour later, a puff of black smoke rose......