There is a golden house in the book, and there is Yan Ruyu in the book.

After Ye Fan discovered the magical pill of mending heaven, he was even more hungry to read the scriptures in the Zangjing Pavilion.

Although Ye Fan knew that his current realm was low, and he was only in the early stage of foundation building, and the pills that could be refined were limited, he believed that among these limited pills, there must be those that suited him or had other uses for himself.

When he was looking for the Three Corpse Poison Pill before, Ye Fan had already flipped through the scriptures on the upper layers of these bookshelves.

However, it is basically a casual flip through, and some scriptures are even put back on the bookshelf just by looking at the name. But these are not important, because those pill scriptures in the upper echelons are at least starting from the Yuan Infant, so it has no effect if you don't look closely.

Now, Ye Fan is mainly reading the lowest level of the pill scriptures.

The pills suitable for refining the Qi Realm are very limited, even at the lowest level, there are not a few books, and they are basically starting from the foundation.

Ye Fan didn't pick and choose, he started reading from the bottom of the first bookshelf, and it was the kind of reading that was very careful.

"Pei Ji Dan, the main role is to consolidate the foundation and strengthen the foundation, suitable for those immortal cultivators who have not laid a good foundation for cultivating the Qi Realm. ”

When he opened the first book of the Pill Sutra, Ye Fan was deeply attracted.

"Pei Ji Dan?" Ye Fan was stunned, and couldn't help but think of Pei Yuan Dan, Pei Yuan Dan is a very common Pei Yuan solid pill, and the effect of Ju Yuan Dan is similar, and Pei Yuan Dan is also only effective for immortal cultivators in the Qi Cultivation Realm, and it is useless beyond the Qi Cultivation Realm.

"It seems that this Pei Ji Dan should be an upgraded version of Pei Yuan Dan!" Ye Fan said to himself secretly, and then checked his Pei Ji Dan formula.

Generally speaking, the pill upgrade is actually a pill upgrade, but it is not a subversive upgrade, but only a replacement of individual spirit grass on the basis of the original, so as to achieve better results.

Sure enough, as Ye Fan expected, this Pei Ji Dan's Dan recipe was not much different from Pei Yuan Dan's side, but two of the spirit grasses were changed.

Read on.

"Oh?"

Suddenly, Ye Fan was surprised, as if he had discovered something new.

I heard Ye Fan muttering to himself: "Although the Dan recipe of this Pei Ji Dan is almost the same as that of Pei Yuan Dan, the refining techniques are very different, especially the process of Ning Dan, which actually requires a special Ning Dan technique. ”

"Let's see what it is. Ye Fan said to himself secretly, and then turned the next page, only to see that it was written: "Take the Chestnut Condensation Pill Technique in the Fire." ”

"Chestnut in the fire?"

Seeing this, Ye Fan was instinctively stunned, and the situation of taking chestnuts in the fire subconsciously appeared in his mind.

"It can't really be a firefight, right?" Ye Fan frowned slightly, and then continued to look down.

"The key point of the fire is to take the chestnut in the fire, and use the high temperature of the spiritual fire to fully integrate various medicinal effects, and finally use a unique technique to condense the pill. ”

"It's really a firefight. Ye Fan's expression was slightly bitter, and his intuition told him that this condensing pill technique was not so easy to master.

However, Ye Fan also knew that once he learned to refine Peiji Dan, not only would he benefit, but he would also become a fragrant bait among the disciples of the Foundation Building Realm, and the benefits generated at that time would only be described as terrifying!

"No matter, let Senior Sister prepare all kinds of spirit grass needed to refine Pei Ji Dan for me first, and then practice slowly. Ye Fan said to himself secretly.

Subsequently, Ye Fan passed a spirit to Senior Sister Zhong Lingyu.

The key to Pei Ji Dan is not the Dan Fang, but the Ning Dan technique, so Ye Fan did not do anything on the Dan Fang, even if the Dan Fang accidentally leaked out of the hands of the senior sister, others would not be able to refine the Pei Ji Dan.

Zhong Lingyu received Ye Fan's spirit book, and when she saw that Ye Fan asked her to prepare some spirit grass, she couldn't help but feel strange in her heart, she hadn't heard that the little junior brother was proficient in alchemy before, how could she refine the pill now?

However, Zhong Lingyu didn't think much about it, but followed Ye Fan's instructions and collected spirit grass everywhere.

It will take some time to collect the spirit grass, and taking advantage of this time, Ye Fan first became proficient in the technique of taking chestnuts from the fire.

The technique of taking chestnuts in the fire lies in skill, a pair of fleshy palms shuttle through the flames without being injured, which requires extraordinary courage and careful operation, but if there is a little bit of fault, it will destroy the whole furnace Dan, and even hurt itself.

Don't look at the physical body of immortal cultivators is better than ordinary people, but you must also know that the spiritual fire burning by the spiritual wood is not an ordinary flame, and the temperature of the spiritual fire is not lower than that volcanic magma, or even too much.

Ye Fan did not rush to make a fire to practice, but first simply mastered the technique of taking chestnuts from the fire.

After a few simple attempts, Ye Fan was able to skillfully conclude the technique of taking chestnuts from the fire.

However, Ye Fan knew that this was just without any interference from the external environment, and the real challenge was to conclude the technique in the spiritual fire.

Then, I saw Ye Fan take out some spirit trees and set them on fire.

Soon, the spirit wood was ignited, and it burned more and more.

The temperature of the flame was very high, and in a short time, the retreat room was turned into a grill.

Ye Fan wiped the fine sweat on his forehead, and began to conclude the technique in the spiritual fire.

But as soon as these fleshy palms approached the spiritual fire, they were frightened away by the terrifying heat.

I saw Ye Fan looking like a frightened bird, and when he looked at the palm of his hand, the back of his hand was already scorched red.

"So exaggerated?" Ye Fan couldn't help but be stunned, this was just approaching the spiritual fire, and he hadn't really put his hand into the spiritual fire, if he put it into the spiritual fire, wouldn't it be scorched in an instant?

At this time, Ye Fan's eyes couldn't help but become a little jealous, and even fearful.

"No, you can't be afraid to move forward, you must master this technique of condensing the chestnut in the fire!" Ye Fan said to himself secretly.

Interests are the biggest driving force, and when he thought of the benefits brought by Pei Ji Dan, the fear in Ye Fan's heart suddenly weakened a little.

At this time, Ye Fan thought of one thing about going to school.

It should still be a physics class in junior high school, and there is such an extension topic in the textbook, the temperature of the flame, is the temperature of the surface of the flame high, or the temperature inside the flame is high?

For this reason, the physics teacher seems to have done a special experiment.

Ye Fan couldn't remember the process of the experiment, but he clearly remembered the final conclusion, the temperature of the surface of the flame was higher than the temperature inside the flame, and the explanation given by the physics teacher in the end seemed to be that the air inside the flame was scarce, and the flame could not be burned completely.

Thinking of this, Ye Fan couldn't help but nodded secretly, "If this conclusion is not wrong, then this spiritual fire should also follow such a law, that is, the temperature inside this spiritual fire should be relatively low." ”

Immediately, Ye Fan became full of confidence, and the previous fear and fear were gone!

"Okay, then start practicing the Ning Dan technique of taking chestnuts from the fire!" Ye Fan said to himself secretly.

Immediately, he saw Ye Fan put his hands into the spiritual fire without hesitation, ready to try to conclude a technique in the spiritual fire.