It takes four hours to refine a furnace of Solid Foundation Yang Yuan Dan, which is really not very efficient. Four hours will cause the medicinal materials that were first put into the medicine furnace to lose a lot of medicinal properties.

If people who don't know how to do it will think that if they are afraid of losing too much medicinal properties, then increase the amount of herbs for the first few flavors, which is nothing more than a waste of some medicinal herbs.

This kind of thinking is absolutely wrong, because the process of refining medicinal materials is very complicated, and it is not that all medicinal materials are refined and finally compressed into pills simply and crudely.

The fusion in the refining process is even more ever-changing, in case the medicinal properties of the first herb are too strong, and when the medicinal properties are neutralized with other medicinal materials, deviations will occur, and a deviation may lead to the loss of medicinal properties in the end.

If we compare alchemy with chemical experiments, the rigor and complexity of the former are definitely far greater than the latter.

Finally, Luan Gong and the maid came to the last step.

The two of them each carried a basketball-sized watering can, which was already filled with water, and a jade stone was placed in the water.

The effect of jade is the same as that of Lu Nan using a moonlight pot to hold water, both of which make the water contain a trace of aura, but the effect is definitely different from cloud and mud.

After the Dan furnace was completely cooled, Luan Gong and the maid stepped on the bench to lift the lid of the furnace and took out the Cheng Dan box from the Dan furnace.

They used fourth-class and second-class Cheng Dan boxes, and the number of Cheng Dan was only nine.

Seeing this result, Lu Nan shook his head again.

The nine red pills were placed in the jade bottle by the two of them, and then rested on the idle workbench nearby.

The woman looked at Lu Nandao proudly: "Do you want to take a look?" ”

Lu Nan shook his head and said, "I'll see later." ”

The woman pursed her lips, she originally wanted Lu Nan to take a look at the pills they had refined first, so that Lu Nan would retreat in the face of difficulties, so that she would not have to wait any longer.

"Since you want to bring shame on yourself, then please." The woman sneered and said, and stepped aside with Luan Gong.

After Lu Nan cleaned up the Dan furnace, he chose a fourth-class and third-level Cheng Dan box from the workbench.

Luan Gong and the maiden suddenly sneered, they can also use the fourth-class and third-level Cheng Dan boxes, but the larger the amount of medicinal materials, the more difficult it is to finely control the medicinal properties, and the quality of the refined pills will be much worse.

Luan Gong whispered: "A novice is a novice, and he doesn't even understand basic common sense." ”

After putting the Cheng Dan box into the Dan furnace, Lu Nan brought the medicinal materials that had already been prepared to his side and placed them neatly in order.

Immediately after, he reached out and rubbed it, and a green flame appeared in the palm of his hand.

Seeing this scene, a hint of surprise flashed in the eyes of Luan Gong and the maid.

As alchemists, they naturally knew something about all kinds of flames, so they recognized at a glance that the flame used by Lu Nan was Nether Fire.

This flame comes from the underworld, and if you want to use it, you must go to the underworld to collect fire, or you have a ghost that can activate the nether fire.

If you want to go to the underworld to collect Nether Fire, you must have strong strength, and controlling Netherfire is not something that ordinary people can do.

The strength of the ghost thing that can stimulate the Nether Fire will definitely not be weak, and ordinary alchemists can't control it at all.

People who can become alchemists are all obsessed with alchemy, and most of their time is spent on alchemy, and the time for cultivation is naturally much less than others.

They couldn't figure out how Lu Nan could have such a rare flame as Netherfire at such a young age.

In short, no matter what method Lu Nan's Nether Fire was obtained, it had already outperformed them in this link.

Just as Lu Nan was about to throw the Nether Fire into the Dan Furnace, he suddenly stopped.

After thinking for a while, Lu Nan decided to give up the Nether Fire and use Mortal Fire to refine it instead.

The Liuding Divine Fire Furnace is different from the Four Ghost Transformation Divine Furnaces, the sparks of the Liuding Divine Fire come from the Taishang Bagua Furnace, which is not consistent with the nature of the Netherfire Fire, and forcibly using it will increase the difficulty of refining.

With a flip of his palm, an ordinary flame was thrown into the furnace by Lu Nan and began to preheat the Dan furnace.

Seeing this scene, the faces of the maid and Luan Gong showed disdain again, and they felt that Lu Nan's Netherworld Fire must have been collected by a master and planted on him, and the reason why Lu Nan didn't use it was because his strength was not enough to control this flame.

After the Dan furnace was preheated, Lu Nan began to put the medicinal materials into the furnace in an orderly manner.

Unlike Luan Gong and the maid, Lu Nan's flame burn was completely in accordance with the standard, and he did not deliberately cool down to seek stability.

At first, the Luan brothers and sisters thought that Lu Nan was a novice and had no sense of seeking stability, but as time went by, they found that Lu Nan was very proficient in controlling the flames and had never made a mistake.

Soon, the two found a reason to comfort themselves, attributing the reason to Lu Nan's use of internal fire, which spontaneously spontaneously, which was extremely smart and convenient.

A look of jealousy immediately appeared in the woman's eyes, she has lived most of her life, and she still relies on external fire alchemy, why can this hairy boy have internal fire when he just enters the industry.

Luan Gong was thinking in his heart, he wanted to figure out how Lu Nan's internal fire came from, if there was really a ghost that could control the fire on him, he could try to grab it, after all, he would not only be able to do alchemy.

It only took an hour and a half, and Lu Nan had refined and fused all the medicinal materials, two and a half hours faster than the woman and Luan Gong.

After extinguishing the flames, Lu Nan directly filled a large basin with clean water and quickly splashed it on the Dan furnace.

The reason why he did this was because Lu Nan felt that there were still some medicinal gases left in the Dan furnace, although it was very small, it was also very precious, and if it could not be wasted, it would not be wasted. Rapid splashing can make the temperature difference of the Dan furnace increase instantly, and under the thermal expansion and cold contraction, the residual medicinal gas can be pressed into the medicine mud as much as possible.

After quietly waiting for the Dan furnace to cool down, Lu Nanqi opened the lid of the furnace and took out the Cheng Dan box.

After opening the Cheng Dan box, the eighteen Solid Nourishing Yuan Pills were embedded in the Dan trough.

Luan Gong and the woman's faces changed, it was obvious that Lu Nan not only had a very accurate grasp of the amount of medicinal materials, but also the temperature control during the refining process was also very exquisite, otherwise he would not have achieved such a perfect effect.

Of the nine Solid Essence Yang Yuan Pills they refined, the last one was slightly missing, and that was because when refining medicinal materials that blindly needed to be pulped, the burning degree was slightly larger, which caused the excessive refining of the medicinal pulp to reduce the amount of medicine.

Lu Nan put the eighteen pills directly into a jade plate, and then placed them next to the pills refined by Luan Gong and the woman.

At this time, the hearts of the maid and Luan Gong had lost their previous self-confidence.

Although Lu Nan's refining process was a little rusty just now, there was not the slightest mistake from beginning to end, if there was no problem with the fire in his middle, this game would be won.

It's impossible not to have problems!

The woman told herself in her heart.

A novice refining this elixir for the first time, even if there is an internal fire, it is impossible not to make mistakes, not to mention that Lu Nan also chose the third-level Cheng Dan box that is twice as difficult.