The alchemy of China has been recorded since ancient times, and the Huang Lao Tao during the Warring States Period has the theory of expounding alchemy, and it has become the largest Taoist sect outside the Zhuangzi Taoist School at that time.

Alchemy was divided into two kinds at that time, the inner Dan refers to the human body as the furnace, exercise people's spirit and spirit, and then form Dan in the body, so as to achieve the purpose of strengthening the body, improving the life function of the human body, and even "becoming an immortal".

It can be said that the Inner Dan Technique, which is the current Taoist cultivation method, while the Outer Dan refers to the refining of pills through various secret methods, which are used to eat, or directly consume certain sesame herbs, so as to ignite their own yin and turn them into yang energy, which is also what Fang Yi is doing.

The Northern Song Dynasty poet Chen Shidao once said that "Taoism takes the cooking of gold and stone as the outer pill; ”

This sentence sums up the distinction between Inner Dan and Outer Dan very well, but in fact, the real alchemy has been lost as early as the way of Huang Lao, and the descendants have gradually gone astray in pursuit of immortality, and have used gold and stone alchemy, which has really killed many descendants of emperors and generals.

The real elixir, except for the qi refiners, it is impossible for those alchemists and warlocks in ancient times to refine it, because alchemy has very high requirements for the cultivation realm and divine consciousness, except for the step of entering the medicine, the remaining steps require divine consciousness and true qi to cooperate.

Fang Yi's alchemy technique is divided into five steps in total, the first step is to activate the Dan furnace, in ancient times, activating the Dan furnace needed to be carried out with Dan fire or earth fire, Fang Yi had not yet reached that realm, and could only be replaced by modern fuel.

The second step is to place the medicinal materials, which seems simple, but the order of placing the medicinal materials cannot be the slightest mistake, relatively speaking, in the alchemy process, this step is the simplest link.

As for the third step, which is called Rong Dan, it requires the alchemist to integrate his true essence into the pill that has not yet been formed, because the alchemist is also a qi refiner, and their true essence contains the characteristics of aura, which can help the pills to fuse with each other.

Therefore, in ancient times, the quality of the elixir refined by alchemists of different cultivation was also different, and even the elixir refined by each alchemist had different characteristics, but this was determined according to their physical attributes, and usually those who had the fire attribute spiritual root were the most likely to become alchemists.

However, in addition to using Dan fire, alchemy can also be used to refine with earth fire and some different fires between heaven and earth, so it is not excluded that people with other spiritual root attributes will become alchemists, and people with different attributes will also produce some unique effects if they fuse the true yuan and the pill.

The fourth step of alchemy is Cheng Dan, Cheng Dan is also known as Ning Dan, after the medicinal materials in the Dan furnace are fused with each other, the alchemist must use his divine sense to divide the pill into several parts, this step is extremely critical, and the slightest carelessness will be wasted.

The strength of Fang Yi's divine sense was barely able to do this, which was why he was refining the Qingxin Pill first, because only by mastering the technique of Cheng Dan could he increase the success rate of Fang Yi's alchemy, so this furnace of pills, Fang Yi was more testing the waters.

The fifth and last step after Cheng Dan is out of the Dan, the pill that has just been refined needs to be placed in the Dan furnace for a period of time, and when the temperature of the Dan furnace slowly decreases to a point, it is necessary to quickly open the Dan furnace to take out the pill.

The morning or evening of the pill will affect the medicinal properties of the pill, and this step is very important to grasp the timing, Fang Yi must master the best time to produce the pill according to the color change of the pill in the pill furnace.

Fang Yi had only carried out the first two steps, and it had already taken nearly a day and a night, which was somewhat different from the cognition in Fang Yi's inheritance, but observing the fusion of medicinal materials in the Dan furnace, Fang Yi felt that he should not have made a mistake.

More than twenty hours of sleeplessness, for Fang Yi's body, he didn't feel very tired, but his divine sense felt a little sleepy, after all, concentrating his divine consciousness in the Dan furnace without interruption was also a big test for Fang Yi.

Taking a deep breath, Fang Yi put his palm on the Dan furnace, it was strange to say, there were at least a Dan furnace with a temperature of more than 1,000 degrees in the furnace, but the surface of the body only felt a slight heat.

"Huh, how so?"

When Fang Yi sent the True Yuan to the Dan Furnace, Fang Yi suddenly found that the Dan Furnace actually gave birth to a suction force, which made the True Yuan in his body leak out wildly, and in the blink of an eye, Fang Yi found that his True Yuan had already consumed more than half.

The suction power of the Dan Furnace was very strong, and Fang Yi couldn't control his True Yuan at all, which made Fang Yi panic a little, because for a Qi Refiner, True Yuan was the foundation of his body, and if the True Yuan was sucked dry, that person would also become a person.

Although the time for the Dan Furnace to forcibly absorb the True Yuan was very short, this sudden change made Fang Yi no longer able to maintain his peace of mind, at this time, he was supposed to use his divine sense to observe the situation of the medicinal materials, and was ready to carry out the steps of the Dan Condensation at any time, but Fang Yi was confused, but he missed this opportunity.

"Failed!"

Feeling the almost empty True Yuan in his body, Fang Yi couldn't help but smile bitterly, his eyes looked at the Dan Furnace, the medicinal herbs that were originally viscous and about to fuse together had become a dark solid at this time, Fang Yi knew that his first alchemy ended in failure after all.

Turning off the flame under the Dan furnace, Fang Yi opened the Dan furnace with his divine sense, and suddenly a foul smell came to his nose, smelling this smell, Fang Yi was dead, it was impossible for many medicinal materials to emit such an unpleasant smell, there was no doubt that the things in it were not even pills, not even medicine powder.

Shaking his head, Fang Yi cleaned up all the unpleasant impurities in the Dan furnace, this process was very easy, because the inner wall of the Dan furnace was as smooth as jade, and the impurities that failed in alchemy could not be attached to it at all.

"Fang Yi, how is it? Hey, I, I said brother, why are you so haggard. ”

When Fang Yi opened the door of the alchemy room, Peng Bin, who was waiting outside, was startled by Fang Yi's appearance, Fang Yi was refreshed when he entered the alchemy room a day ago, but at this time, Fang Yi had deep eye sockets and dull hair, and the whole person was depressed.

Peng Bin is also an innate martial artist now, he knows that with their current cultivation, not to mention just staying up for a day and a night, even if they don't sleep for three or five days, they won't be like Fang Yi's appearance, Fang Yi's current appearance can only show that he spent a lot of effort when refining pills.

"Fang Yi, what's wrong with you, are you okay?"

Hearing Peng Bin's shouting, the people who lived in the middle courtyard and the front yard all ran over, and they were all startled when they saw Fang Yi's appearance, although Fang Yi in the past could not be said to be as rich as jade, but he was not so haggard.

"In early summer, I'm fine. Fang Yi shook his head and said, "Prepare some water, food and fruits for me, I'm going to meditate and rest for a while." ”

Fang Yi, who was originally able to basically do Bigu, now had to replenish some energy from food, because his body's consumption this time was too great, which also made Fang Yi know why the inheritance stated that only when he cultivated to the Qi refining period could he be qualified to go to alchemy.

"Fang Yi, has your elixir been refined?" Peng Bin stretched out his head and glanced into the alchemy room, frowned slightly, and said, "Why does it smell like rotten meat, why does this elixir smell so bad?"

"That's what it tastes like when it's scrapped. ”

Fang Yi threw a ball of impurities wrapped in an oilcloth in his hand to Peng Bin, and said, "Big brother, go back and find a livestock to try the medicine, and see if this waste impurity is poisonous, no, I want to eat something first to rest for a while." ”

Although his divine sense was not damaged, the wear and tear of his body made Fang Yi a little unable to support it, and without waiting for Bai Chuxia to prepare food for him, Fang Yi hurriedly ran to the kitchen in the front yard, opened the refrigerator and picked out some ready-made fruits to eat, and after seven or eight apples were eaten, Fang Yi felt better.

Back in the alchemy room, Fang Yi meditated for a whole day and a night, and the true yuan in his body was filled again, in this process, Fang Yi was also constantly reflecting on the reason for his alchemy failure this time, and the problem was in the third step, that is, the fusion pill.

Fang Yi originally thought that Rong Dan only needed to input the True Yuan into the Dan Furnace, but what he didn't expect was that the Dan Furnace would actually absorb the True Yuan in his body by itself.

Fang Yi, who was completely inexperienced, panicked all of a sudden, but Fang Yi thought about it afterwards, he didn't need to be so nervous, the True Yuan absorbed by the Dan Furnace was not enough to completely dry up his body, and the next steps were all controlled by his divine sense, and it was entirely possible for him to successfully refine this Pure Heart Pill.

After thinking about the cause and effect of the matter, Fang Yi got up and returned to the middle courtyard, looking at everyone's worried eyes, Fang Yi opened his mouth and said, "Let everyone worry, I'm fine." ”

"Brother, if you don't practice this Dan, after all, our current cultivation is not enough. Peng Bin said that he could make an innate cultivator look like that, Peng Bin could imagine how much effort Fang Yi had expended.

"Big brother, this alchemy is estimated to have been cut off from the inheritance now, where can it be refined so easily. Hearing Peng Bin's words, Fang Yi couldn't help laughing, he hadn't planned to refine the first furnace of pills.

Song Tianyu's family is an alchemy family, Fang Yi once heard him say that if you want to become an alchemist, you often have to stay with a real alchemist for five or six years, starting with identifying medicinal materials, and then slowly learning alchemy techniques.

Fang Yi only relied on the inheritance in his mind to try alchemy, if he succeeded once, it would be abnormal, Fang Yi himself didn't dare to have such extravagant hopes when he started alchemy.

(End of chapter)