Chu Yunhan is a big stone currently pressing on Lu Yu's heart, and he must find a way to remove this stone as soon as possible. Pen, fun, and www.biquge.info

Therefore, Lu Yu can only silently say thank you to Li Wenmu and them in his heart now.

As soon as Lu Yu closed the door of the secret room, he sat cross-legged in the pile of medicinal herbs.

From today onwards, Lu Yu will start practicing the art of alchemy.

As for the teaching materials for practicing alchemy, they were the large boxes of books that Xu Liu brought to him and the piles of medicinal materials.

Those large boxes of books were sorted out by the legendary sixth senior brother, and after Xu Liu sent them, Lu Yu took the time to read them roughly.

After a cursory look, Lu Yu found that there were no advanced alchemy techniques recorded in those books, and most of them were the attributes, characteristics, and some principles and taboos of various common medicinal materials.

As for the art of alchemy, there is only a thin book, which talks about some basic alchemy techniques and matters to be paid attention to.

After probably turning it over, Lu Yu couldn't help but gasp.

According to rough estimates, there are at least 10,000 kinds of medicinal materials recorded in these boxes.

According to Xu Liu, this is just a part of the rough screening of the sixth senior brother, if Lu Yu still wants to continue to practice the art of alchemy, he will have to learn more later.

If it weren't for a certain understanding of Xu Liu's character, Lu Yu would have thought that Xu Liu was deliberately rectifying himself.

After pondering what Xu Liu said at the beginning, and after thinking about it for a while, Lu Yu finally understood the purpose of Xu Liu and the sixth senior brother.

They wanted to use these large boxes of books to clearly point out to Lu Yu the most important section of practicing alchemy.

That's the foundation.

The so-called alchemy technique is to select the most suitable medicinal materials among thousands of different medicinal materials, rationally match, with the assistance of monarchs and ministers, and through special alchemy techniques, the essence of heaven and earth contained in the medicinal materials is stimulated to the greatest extent, so as to refine the elixir that you are satisfied with.

To achieve this step, the most important thing is to be familiar with the properties and characteristics of various medicinal materials.

Only by doing this step will you be qualified to talk about the art of alchemy.

Learning to be familiar with the medicinal properties of various drugs is not only the most basic and important part of practicing alchemy, but also the most time-consuming and labor-intensive part.

Heaven and earth are infinitely created, since Pangu opened the heavens and the earth for hundreds of millions of years, the universe does not know how many heavenly and earthly treasures have been formed, as for those valuable medicinal materials, it is even more countless.

Manpower is sometimes poor, and even a cultivator, according to normal time and energy, it is almost impossible to figure out all the medicinal properties of so many herbs in his lifetime.

Alchemists are more than just superficial glory and brilliance. The tedium and bitterness in this can only be experienced by those who really step into it.

In the 10,000,000 years of the development of the human race, no alchemist dared to say that he had gained insight into the medicinal properties, attributes, and taboos of all medicinal materials in heaven and earth.

Every qualified alchemist, all his life, has been constantly learning and exploring.

And the art of alchemy itself is constantly developing with the development of the human race, through the hard work and continuous exploration of generations of alchemists.

For countless years, how many Dan Dao masters who have reached the peak of alchemy have spent their entire lives doing this work, studying the medicinal properties of various medicines, and they dare not slack off in the slightest.

For countless years, how many well-educated people who have been immersed in this way for decades and have been poor have sighed with a look of embarrassment when talking about alchemy, and they dare not say that they have already entered the hall in alchemy.

For countless years, how many hot-blooded young people who thought they were gifted and intelligent and ambitious wanted to reach the peak of this road bowed their heads to these weak medicinal herbs in just a few months and withdrew gloomily.

If the art of alchemy is compared to a big river, then every alchemist is a drop of water that makes up this big river. It's just that some people shine in the art of alchemy because of their talent and opportunities, and they have made gorgeous waves. And some people, although they have put in the same effort, can only drown in the crowd of beings for various reasons.

The way of alchemy is one of the supreme avenues between heaven and earth. Using ordinary medicinal materials to refine an elixir with amazing potency is truly a struggle with heaven and earth for creation.

Only when you really step into this avenue can you appreciate its profound and infinite charm.

It's a truly endless avenue to learn.

Today, Lu Yu is about to take the first step towards this avenue.

The medicinal materials that Lu Yu asked Li Wenmu to exchange were only a small part of those books.

There are 1,258 species in total.

Lu Yu sat cross-legged.

On his left-hand side, dozens of books are neatly placed.

The knowledge on these dozens of books, Lu Yu has already read it carefully. According to Lu Yu's current powerful divine sense and memory, he can completely achieve the point of unforgettable.

And on Lu Yu's right hand, there was an inky black Dan furnace.

This Dan furnace was also exchanged by Lu Yu for Li Wenmu from the sect. Although it was the lowest-level Dan furnace, it was much better than the medicine jar that Lu Yu used before.

It is used to train Lu Yu, which is the most suitable.

Time is precious, Lu Yu didn't dare to waste a minute or a second, after adjusting his state, Lu Yu stretched out his hand, picked out a few items from the piles of medicinal materials next to him, and threw them into the Dan furnace.

Then, Lu Yu pressed his right hand on the Dan furnace, entered his true qi, and started the first real alchemy according to the alchemy technique written in the book.

Any qualified Dan furnace, regardless of its grade, is a magic weapon. If you want to use the Dan Furnace to refine the Dan, you must use your True Qi to urge it.

With the input of Lu Yu's true qi, the Dan furnace began to operate normally. But only a few seconds later, the Dan furnace suddenly shook. Immediately, a scorching smell accompanied by a puff of black smoke wafted out of the Dan furnace.

In this regard, Lu Yu was expressionless, and immediately poured out the scrapped medicinal residue in the Dan furnace, and then grabbed a few more medicinal herbs, threw them into the Dan furnace again, and started the second attempt.

The difficulty of cultivating the path of alchemy, Lu Yu already had a clear understanding from Xu Liu's teachings and these boxes of books. So in the face of failure, Lu Yu was prepared from the beginning.

Failure is not terrible, as long as I can learn lessons again and again, and constantly try to improve, I can always achieve success.

This process can only be explored slowly by Lu Yu himself, and others can't teach it.

"Bang. ”

After a few seconds, there was another clear sound, and Lu Yu's second furnace of medicinal materials was scrapped.

Lu Yu still cleaned up the medicine residue with a calm expression, and then started the third attempt.

After that, it's the fourth, fifth, and sixth......

10th ......

Fiftieth ......

100th ......

......

After Lu Yu's attempts again and again, bags of medicinal materials turned into waste residue in Lu Yu's hands.

The medicinal herbs that were piled up around Lu Yu like a hill were consumed at a terrifying rate.

And with the rapid consumption of medicinal materials, Lu Yu's appearance is also quietly changing.

As time passed, wisps of blood began to appear in Lu Yu's eyes, and dark circles also appeared on Lu Yu's face, and the color was deepening little by little.

In order to save time, Lu Yu casually poured the smoke and waste residue produced after each alchemy failure. The dust that splashed all over Lu Yu's body was all over his face. The hair that was originally neat also fell out because there was no time to comb it.

After more than ten days of retreat, Lu Yu's body can no longer see the handsome appearance he had at the beginning, the whole person is ragged, unkempt, and his face is a little pale, like a refugee who has been wandering for a long time.

Even Li Wenmu and the others were surprised after seeing Lu Yu's change.

Up and down his body, the only thing that hasn't changed in Lu Yu may be that pair of cold eyes and the movements in his hands.

Lu Yu's retreat lasted for a month.

In the past month, Lu Yu has never stepped out of the secret room. Even the meals were sent by Li Wenmu and them every three days.

Lu Yu threw his entire body and mind into alchemy.

He's like a machine that never needs to stop, repeating almost the same action all the time.

Lu Yu practiced like this. In just one month, Lu Yu spent more than one million contribution points in exchange for thousands of medicinal materials, and more than half of them were consumed.

Among them, the vast majority of medicinal herbs end up as a pile of useless waste residue.

Failure, failure, continuous failure, this is what Lu Yu has known during this time. In such a long period of time, the number of times Lu Yu succeeded was very few.

The difficulty of cultivating the art of alchemy was indeed beyond Lu Yu's imagination.

Lu Yu tasted the taste of failure again and again, summed up his experience from failure little by little, and then compared the content of those books, and slowly groped.

Lu Yu did not feel bored and frustrated at all because of the tedium of this process and the failures again and again, let alone retreat because of this.

Because Lu Yu knew in his heart that this was a hurdle that he had to overcome.

Only after stepping past can he be considered qualified to practice alchemy.

Otherwise, Lu Yu would have to completely bow his proud head in front of the path of alchemy and completely admit his failure.

Such a result is something that Lu Yu is absolutely unwilling to accept.

Because his proud dignity did not allow him to admit defeat, Lu Yu walked out of the secret room again after a month of hard retreat.

After such a long time, freed from the boring practice and exposed to the air and sunlight of the outside world again, Lu Yu suddenly had a feeling of seeing the light of day again.

Lu Yu couldn't help but stretch his waist and breathe a sigh of relief.

It can be seen from Lu Yu's expression that this month's harvest is still quite satisfactory to Lu Yu.