In the city of Song Immortal, small streets and lanes.

A small alchemy workshop in the middle of nowhere.

A Dan furnace in the small courtyard is almost idle all day long, adding spiritual charcoal from time to time, burning a raging fire. One furnace is produced in an hour, and at least ten furnaces of low-grade elixir must be refined every day.

In this flash, a year has passed.

Su Chen's alchemy technique is also improving rapidly in this alchemy of as many as ten furnaces day after day.

Other monks who practice this alchemy usually start as an alchemy apprentice, and at this time they just help the master to do some chores, watch the master's alchemy, and do not operate, at least follow the alchemist for five to ten years before it is possible to operate the alchemy furnace.

After surviving the long apprenticeship period, he was allowed to open the furnace for alchemy independently. However, the number of times is limited, and it is often ten days or half a month before there is a chance to refine the elixir. It will take another five years to become an alchemist and try alchemy on his own.

When you have enough experience, after one or twenty years, you can become a real alchemist, and you can take alchemy apprentices.

Su Chen skipped the long alchemy apprenticeship period, bought an alchemy jade slip and a low-grade elixir recipe and came back, and directly started alchemy.

In just one year, he has even surpassed some alchemists in alchemy. The failure rate at the beginning was extremely high, but the cost of the low-level elixir was extremely low, and he could afford to lose it.

In this year's time, the success rate of Su Chen's Dan has also changed from the initial ten furnaces to one furnace, to two furnaces, and until the recent three or four furnaces.

He also started from the lowest-level first-order lower-grade spirit pill to refining some slightly more difficult first-order high-grade spirit pills.

Ten furnaces can successfully refine three furnaces or more than four furnaces, which is already the strength of an alchemist with a high level. This still does not guarantee that the alchemist will be able to earn spirit stones, and he will still lose.

...

After this year, Su Chen's cultivation also reached the second layer of the Qi Refining Period. Because it was the early stage of qi refining, the cultivation improvement was quite rapid, and the Qinglian Yuan Shen in the Spirit Mountain grew a second lotus leaf.

In order to be able to concentrate on alchemy.

In the past six months, Su Chen no longer cared about the business of the Spirit Valley, the elixir and the elixir.

He only occasionally left for the morning of Geling Mountain, went to the Linggu Farm at the foot of the mountain for a walk, and then bought some Linggu back. And the spirit valley that he planted himself was also mixed in it, greatly increasing profits.

The gods don't know the ghosts, and no one knows that there are more spiritual valleys out of thin air.

This amount is not much, even Anu can't detect it, let alone others.

The spirit valley he grew himself, as well as a small amount of spirit medicine and low-grade spirit pills he refined, were all handed over to Anu to sell at the Chaoge Night Market in exchange for spirit stones.

Anu is still a mortal, and it is not safe to do this business alone.

Brother Zhang is often idle at home in the evening, so he and Anu go to the night market together to help set up a stall to sell some spirit valleys and spirit pills, and they can also earn some spirit stones by the way.

It took Su Chen more than a year to accumulate nearly 10,000 spirit stones.

If this spirit stone were to buy the Myelin Cleansing Pill, it would be spent on ten pills, and it would still not reach his desired goal.

Su Chen didn't plan to buy it, so he decided to refine it himself.

From the shopkeeper of the Zhou Clan's Spirit Pill Pavilion, he bought a low-grade elixir formula for the Purifying Pill at a high price.

Then, he used most of the spirit stones he had earned back this year to cultivate the thirty first-order elixirs needed for the low-level marrow cleansing pill.

The age of these elixirs is very high, often decades, more than hundreds of years. Just planting these spiritual herbs in the Spirit Mountain took him nearly half a year.

The reason why the myelin cleansing pill on the market is so expensive.

A large part of the reason is because the growth period of the dozens of medicinal materials required is as long as tens or hundreds of years. This kind of spiritual medicinal material, even in the medicine garden of the Immortal Cultivator Family in Chaoge Immortal City, is very rare.

On the one hand, it is necessary to hire immortal cultivators to cultivate these elixirs, and on the other hand, it is a large long-term cost.

To cultivate the elixir, it is also necessary to have a senior alchemist to refine these elixirs into elixirs. The alchemist has to take at least thirty percent of the profits.

Then, this marrow cleansing pill was sold in the Spirit Pill Pavilion, and the Dan Pavilion had to earn a small part of the profit.

The real cost of medicinal materials should be about one-fifth, or even lower.

Su Chen himself used spirit stones to go to the night market and the elixir garden to buy back the seeds of the elixir, and then used the spirit stones to increase the spiritual energy, and planted them in Fangcun Ling Mountain, and the cost was less than one-tenth of the selling price.

Su Chen obtained a recipe for a low-level myelin-washing pill, and used most of the spirit stones he earned this year to cultivate dozens of elixirs of the myelin-washing pill.

"It's been a year, and I'm finally ready!"

Su Chen let out a long breath.

This year, he studied the alchemy in this alchemy jade slip alone, and he made more than a thousand furnaces of elixir, and endured all kinds of hardships.

The fire is too fierce, and the furnace is fried, and the liquid is sprayed from time to time.

It is even more common for the elixir in the alchemy furnace to be scorched, or to fail to condense the pill.

For the mastery of the heat and the timing of the pill, this is the most difficult thing to control in the alchemy process. This requires a lot of experience in alchemy before practice makes perfect.

Su will put out the elixir materials for refining the myelin-washing pill.

It took tens of thousands of spirit stones to cultivate a total of 100 spiritual herbs, and the cost was only 100 spirit pills. It can be used to refine a hundred furnaces of marrow cleansing pills.

If successful, each furnace can refine a myelin-washing pill. Of course, if it is not successful, it will be burned and destroyed.

That's all he has.

In fact, the elixir can also be refined together with ten elixir medicinal materials, and ten elixirs can be baked at a time to save time. But this requires a very clever alchemy, and in order to reduce the risk, Su Chen only refines one elixir of elixir materials at a time.

...

"Ruined!"

"Ruined again!"

Su Chen buried his head in front of the small alchemy furnace, carefully adding spiritual charcoal, staring at the furnace fire and controlling the fire. Ten furnaces a day, except for a short rest for one or two hours, are all infused with the whole body refining elixir.

The ten furnaces that were refined at the beginning were all destroyed, and none of them were refined, which made Su Chen very painful.

In just one day, he smashed into a thousand spirit stones, and all of them were lost. If this is an ordinary alchemist, the bottom of his family and pants that he has already lost is gone, and he can't wait to jump into the river.

However, such a low rate of Dan is actually a normal phenomenon.

Su Chen had just begun to try to refine the Purifying Pill.

Even if it is an alchemist, who has just started refining a brand-new elixir, and is not familiar with the medicinal properties of herbs, the probability of refining is extremely high, and ten furnaces, or even dozens of furnaces, will not be able to produce the elixir.

Su Chenlian failed many times in this myelin-washing pill, and when he found out where there would be a problem, he avoided it, and gradually mastered a little trick.

After twenty furnaces, he grasped the heat and finally refined the first marrow cleansing pill.

Four days later, Su Chen refined forty furnaces in one go, and finally completely mastered the medicinal properties of the myelin-washing pill medicinal materials, and it was already very easy to refine.

His Cheng Dan rate began to soar, quickly increasing to about forty percent.

On the tenth day, all the medicinal materials of the marrow cleansing pill were exhausted, and the fire of the alchemy furnace was finally extinguished.

Su Chen's face was covered with charcoal ash, and his face was a little dark, but he couldn't resist the joy and excitement in his eyes. In his elixir bottle, there were thirty-five more pills of myelin cleansing pills, and he couldn't help but be overjoyed.

The golden and crystal clear marrow cleansing pills exuded an incomparably attractive aroma, as if they were showing off their value as the treasure of the elixir.

"Wash the marrow Dancheng!"

Su Chen was extremely excited, he worked hard for a whole year, planting medicine and cultivating alchemy day and night, and finally came up with this huge result.

He couldn't wait for a long time, and wanted to wash the marrow again and break the bottleneck of his spiritual marrow.

Su Chen meditated cross-legged directly in the small alchemy workshop, pranayama for an hour.

Subsequently, a pill of myelin cleansing pill was thrown into his mouth.

Slid into his abdomen and melted into a golden liquid that permeated his body and adsorbed on his spiritual marrow. The medicinal power of these marrow cleansing pills penetrated into the depths of the spiritual marrow, constantly cleansing the spiritual marrow.

The process of washing the spiritual marrow, like ten thousand ants devouring bones, is quite uncomfortable.

Half an hour later, a little impurities and dirt in the spirit essence were washed out, and the effect was still obvious.

Well, the effect of marrow washing is good.

Go on!

One more!

Su Chen rested for a while, stuffed another one in his mouth, and continued to wash the marrow.

An hour later.

Again!

Su Chen kept one after another.

Before I knew it, two days passed in a flash.

The myelin-washing pill in this myelin-washing pill bottle is decreasing at the speed of seeing.

Su Chen had already taken fifteen pills of the marrow cleansing pill in a row, washing away a large part of the impurities of the spirit marrow and becoming much purer.

At this time.

Su Chen was surprised to find that although the same marrow washing pill, the effect of marrow washing began to weaken slowly. By the time he took sixteen pills, he had completely lost the effect of washing the marrow.

"What's going on? Can't you continue to wash the marrow?"

"If one pill of the marrow cleansing pill washes two points, my spiritual marrow is estimated to have just reached sixty points. I have just reached the edge of the high-grade spiritual essence, and it is still early to seventy or eighty o'clock. ”

Su Chen was puzzled, and suddenly thought of a question.

Resistance!

Could it be that this is the reason?

This issue has also been mentioned in alchemy. This kind of resistance usually occurs in the elixir. They are very strong in medicinal properties, and monks who take them for a long time are prone to develop resistance.

Foods such as Linggu and Lingtao do not have the so-called drug resistance.

Su Chen couldn't help but be annoyed.

He had only taken fifteen pills, and he had developed a strong resistance. After taking another pill, it didn't have the slightest effect, and he wasted two pills of myelin cleansing pill in vain, which meant that he couldn't wash it anymore.

"Okay, so be it!"

Su Chen put away the remaining nineteen pills of myelin cleansing, crying and laughing.

Although he couldn't wash it after washing too much, he was still very satisfied with the effect of this marrow washing.

In one breath, he finally washed this spiritual essence of his own to nearly sixty points.

In this way, he often eats spiritual rice, and the cultivation speed of the Qi refining stage realm has exploded significantly.

It was shortened from more than forty years to only five years, and when he was about twenty-five years old, he could cultivate to the ninth level of the Qi Refining Period.

This kind of cultivation progress is acceptable to him.

"The Cleansing Pill has been refined. This spiritual essence has also been washed to the limit, it's time to go back! Let Anu wash it too, and see if she can break through the Qi Refining Realm. ”

Su Chen's most direct purpose of cultivating the Dan Technique this time was to wash himself and break through the bottleneck of the spiritual essence.

Su Chen was in the well in the courtyard, fetching water to clean it. Push the door, get out of the small alchemy workshop, lock the door of the refining workshop, and prepare to go home.

...

Fang Master Li has been wandering around the alchemy workshop recently.

This... This small alchemy workshop has not closed down after a year, how can it be in full swing, it seems to be quite prosperous!

He was very puzzled, scratching his ears and cheeks anxiously, but he couldn't figure it out.

Suddenly, the courtyard door of the alchemy workshop opened, and Su Chen came out refreshed.

"Brother Su, what kind of pill have you been refining recently? I also know a little about alchemy, can we cooperate to open this alchemy workshop? or operate it together. ”

Fang Master Li hurriedly stepped forward, with a smile on his face, and asked.

"It's just a few low-level elixirs, and it's always a fryer, it seems that I still don't have any talent for alchemy! There's still something to do, go first. ”

Su Chen smiled, arched his hand, and walked away.

"This..."

The owner of Li Fang was stunned.

Alchemy is not good, how many years can it last? He opened this alchemy workshop, but he couldn't survive even half a year.