Lin Sen stood up, he knew very well that Liu Yunshan's cultivation was only in the early stage of the Dan, and it was impossible to see through the prohibition arranged by Lin Sen and see the situation in the house.

Lin Sen walked out of the room, with a wave of his right hand, the gate of the courtyard opened, at this time, Liu Yunshan's face moved, and he quickly walked in with a smile, handed Lin Sen a jade slip, and said: "Uncle Martial Master, this is the Dan recipe for refining the second-grade Dan Juling Pill, which contains a detailed record of the medicinal materials required for refining and the method of refining, in addition, this jade slip also appendices the alchemy experience in the past few decades, you first explore it yourself, if there is anything unclear, you can go to the North Courtyard Sipinju to find me." ”

Lin Sen took the jade slip, his consciousness swept away, and his heart was suddenly shocked, he didn't expect Liu Yunshan to give him such a jade slip, this jade slip recorded in detail Liu Yunshan's countless alchemy experiences over the decades, which made a detailed record of the success of alchemy and the factors that affect the quality of the pill.

Judging from the content, this jade slip is of great value to Lin Sen at this time. He and Liu Yunshan are only a few faces, but for some reason, this person is so enthusiastic about himself, and this move is obviously intended to win him over.

Liu Yunshan seemed to see Lin Sen's guess, was silent for a while, and said with a slight smile: "Uncle Martial Arts, don't think about it too much, in fact, I came here on the orders of Master Li Ji." And from tomorrow onwards, there will be a retreat in the next place, if not, the green eldan, after a long time, the effect of the medicine will be reduced. During the period, if there is anything unclear from the uncle, you can go directly to the Liupinju to find the old man, and the master will definitely tell you the key points about alchemy in detail, in addition, the herbs in my courtyard, you can use them at will, but you must not break the roots when picking, as for the Sipindan furnace in the lower garden, if the uncle fails to reach the level of refining the Sipindan, do not try it easily. ”

Lin Sen nodded.

After Liu Yunshan finished speaking, he took out a set of clothes and jade pendants from the Qiankun bag, put them aside, and said, "This is the clothes of the disciples of the Second Rank Residence, as for this jade pendant, as a disciple of the Dansheng Sect, everyone has to wear it." ”

After saying this, Liu Yunshan's body turned into a long rainbow and left the courtyard.

Lin Sen was silent for a while, picked up his clothes and went back to the room directly. It wasn't until the next morning that Lin Sen woke up from the breath, he could feel that the spiritual energy of this Dan Holy Sect was extremely sufficient, and after cultivating here overnight, the spiritual power in his body was immediately enriched a lot.

Lin Sen got up and changed into Dan Shengzong's clothes, which was a set of white robes that Lin Sen liked, with the cuffs embroidered in the shape of two Dan furnaces, and hung a jade pendant representing his identity.

After doing this, Lin Sen pinched the trick with his right hand, and a prohibition immediately disappeared above the courtyard gate, and then, with a wave of Lin Sen's right hand, countless smoke rings appeared, and soon turned into a fog that enveloped the entire courtyard.

At this moment, Lin Sen glanced at the bronze Dan furnace that was more than one person high, and with a wave of his right hand, the Dan furnace immediately flew up, threw out of the medicine garden, and flew into the second room. At the same time, Lin Sen slapped the Qiankun bag and flew out of a white Dan furnace the size of a palm, and bursts of cold and biting cold air instantly diffused, this Dan furnace was the five-rank Dan furnace that Lin Sen purchased in the Refining Pavilion of Wanluo City, the Puhan Dan Furnace.

As Lin Sen threw it down, the Puhan furnace immediately became larger, and when it landed, the Dan furnace also became more than one person high, and bursts of cold air dispersed, making the temperature of the entire courtyard suddenly colder.

In the following days, Lin Sen was here for alchemy.

The way of alchemy is broad and profound, in addition to having a Dan Yuan, alchemists are more likely to practice it continuously, and this Dan Dao is more difficult than cultivating supernatural powers. Generally, beginners in Dan Dao have an extremely high failure rate in alchemy, and there is little possibility of success.

A month passed.

Lin Sen has been trying alchemy for more than a month, combined with Liu Yunshan's alchemy experience and the superior conditions of the Wupin Dan furnace, but these days, countless alchemy has only succeeded a few times.

That time, he spent a lot of medicinal herbs, and he barely refined three Gathering Spirit Pills, of course, these three Gathering Spirit Pills were just one product.

On this day, in the medicine garden where Lin Sen was, there was a bang, and the whole courtyard suddenly rolled with clouds and mist, and there was a violent cough in it, Lin Sen walked out of the medicine garden with a gray face, he looked at the smell of burnt paste in the Dan furnace, and smiled helplessly, this time the alchemy failed again.

This alchemy verified the experience recorded by Liu Yunshan's jade jian, if he did not grasp the intensity of the fire, he would urge too much, causing the Dan furnace to be damaged and the alchemy to fail.

Of course, Lin Sen's Dan Furnace was not an ordinary Dan Furnace, and refining the second-grade Dan Pill would naturally not be so easy to break.

"No wonder that in the test of the day, in addition to Song Fang, another fire attribute physique disciple has the qualifications to directly enter the cabinet, this is because people with fire attribute physique can better control the earth fire, as for the water attribute, maybe it is also because it can be well harmonized with the earth fire" Lin Sen muttered, his own physique belongs to the wood attribute, if strictly according to the Dan Dao, the wood attribute person is not suitable for alchemy, after all, wood makes fire, often urging too much, it is extremely difficult to grasp the fire.

Lin Sen walked in the medicine garden, his eyes showed a deep expression, under the placement of the Dan furnace, there was an earth fire, and his own spiritual power was the key to controlling the earth fire, but this had nothing to do with the strength of the spiritual power.

Controlling the alchemy of the earth fire with one's own aura requires extremely skilled control ability, according to the fluctuation of the earth fire, the time limit of the alchemy, and external factors, etc., these will be the key to controlling the fire.

If there is a slight deviation in it, it will cause the alchemy to fail, and if the deviation is very large, then the Dan furnace is very likely to be broken.

This link is the most difficult hurdle for beginners in alchemy. Of course, if the cultivation has reached the Yuan Infant Stage, then there are no such requirements for refining the pill with infant fire.

In addition, alchemy is also the key to the combination of herbs, just the alchemy medicinal materials recorded in the Danfang are only a rough match, and alchemy is not as uniform as cultivating supernatural powers.

Danfang records that it is only one of the refining methods. In fact, there are several, if not hundreds, of refining methods for the same elixir. But these are still secondary, there will be all kinds of unpredictable problems in alchemy, such as the strength of the aura in the surrounding environment, whether there are impurities between the herbs, whether the combination of the pills is in line with their own attributes and physique, etc., it is extremely difficult to become an alchemy master. This feeling is like the feeling of powerlessness at the beginning when I climbed the Nine Illusion Pagoda at the Hidden Void Peak.

After a little silence, Lin Sen finally knew that a month ago, when Guang Jizi said that he would refine the second-grade pill in two years, the other people's faces showed a hint of strangeness, which clearly made it impossible for him to refine the second-grade pill in two years.