Xu Yuan had already left, but the old man who was called the Yuan Venerable by Xu Yuan paid attention to the scroll in his hand, and seemed to have forgotten the existence of Chen Yu and Mu Su.

Mu Su stood at the door, also without saying a word, and the atmosphere in the house seemed silent.

"It's this Tao again!" Chen Yu pouted, and after waiting for a while, Chen Yu was full of slander in his heart, so he simply paced with his hands in his hands, and walked around this room regardless of the old man.

The furnishings of the house can be described as minimalist, not like the place where the master of a courtyard lives, but Chen Yu's eyesight is not bad, and he still sees a lot of good things when he looks at it.

For example, there is a painting hanging on the wall, not to mention the painting skills, but also contains a certain mysterious artistic conception, which makes people feel that their minds have become ethereal after a few more glances.

There is also a Dan furnace placed on a square table, the Dan furnace is clumsy in style, full of ancient and mysterious runes, Chen Yu looked around, stretched out his hand to rub it, and couldn't help but sigh.

Of course, Chen Yu of the Dan Furnace has seen it, but he has not fiddled with it personally, in the memory of the Blood Flame Emperor, he has had several experiences of alchemy, but his attainments are not very high. There was nothing left and right, Chen Yu combined his memory and carefully studied this Dan furnace.

Although the attainments are not high, Chen Yu can also see that this Dan furnace is not an ordinary thing, the runes all over the furnace, especially the runes of the nei department, can be called mysterious, Chen Yu can see that there are different kinds of runes that gather, disperse, liu turn and prevent Yu in a array.

Looking at Chen Yu's performance, Mu Su's eyes were a little dull.

This is the place where Dao Hong, the master of the Medicine Spirit Academy, Dao Hong's status in the Langya Sword Sect is extremely respected, that is, the sect master Zuo Xingzhou was treated politely when he saw it, and Chen Yu came here, it was like visiting those shops in the mundane world, which made Mu Su sweat for Chen Yu in his heart.

......A light cough sounded, but Dao Hong finally put down the scroll and straightened up from the rattan chair.

His face was clumsy, his eyes were cloudy, like a dying old man, he looked at Chen Yu like this, but Chen Yu had a feeling that he had been seen through and understood all the secrets.

This feeling is familiar, Chen Yu had a similar feeling when Chu came out of the Phantom Spirit Secret Realm of Yu Spirit Sect and Yu went to the old man who was guarding the entrance of the secret realm.

Could it be that the master of this Medicine Spirit Academy is actually a super powerhouse who has entered the Divine Realm? This feeling made Chen Yu very uncomfortable, and his heart jumped, and a thought was turned.

"Get out!" Before Chen Yu could continue to think more, Dao Hong suddenly let out a low snort.

Chen Yu paused for a moment.

Dao Hong pointed to the door and said, "Get out!"

Chen Yu couldn't help scratching his head and asked, "Where are you going?"

"Dou Qing!" Dao Hong said with a low voice.

The young man outside the door quickly appeared at the door and said respectfully, "Master?"

"Give each of them a medicine bowl and a vajra powder material!" Dao Hong lay down again and said.

"Okay!" Dou Qing nodded, turned around and disappeared into the doorway.

Chen Yu didn't know why, and looked at Mu Su, who was also at a loss, but still walked out of the door.

However, after thinking about it carefully, Chen Yu still turned around and walked out of the door, muttering: "So it's mysterious!"

Dao Hong completely ignored Chen Yu's muttering, took the scroll, and continued to read it.

After waiting in the courtyard for less than a minute, Dou Qing walked out of a room on the side, holding a medicine bowl in each hand, and handed it to Chen Yu and Mu Su respectively.

The medicine bowl is very large, and it is quite heavy to start, Chen Yu took the medicine bowl and said: "This senior brother, what do you mean, we are not here to make medicine!"

Dou Qing grinned, his smile gave people a sense of clarity, and said, "I don't know." I'm just following the Master's arrangement!"

After speaking, Dou Qing picked up his own medicine bowl again, and pounded it lightly and heavily, and the sound of pounding the medicine was still so rhythmic.

Chen Yu casually put the medicine bowl aside, pondering Daohong's intentions.

According to Chen Yu's conjecture, he was brought to the Medicine Spirit Academy, which should have been to contact the suspected martial artists of the Medicine Spirit Academy, but now the act of being asked to make medicine completely overturned Chen Yu's conjecture.

Tuk Tuk, Chen Yu was still pondering, and there was a sound of pounding medicine beside him.

Chen Yu turned his head to look, only to see Mu Su holding a bowl in one hand and a pestle in the other, and he had already begun to pound the medicine.

Compared with Dou Qing's pounding sound with a strong sense of rhythm, Mu Su's pounding sound was as sharp as a cracked silk, sometimes light and sometimes heavy, which was harsh and ugly. It's just that Dou Qing's sound of pounding medicine has not been disturbed, and the rhythm is still distinct.

After staring at Mu Su for a long time, Mu Su didn't open his mouth to talk to Chen Yu's intentions, and Chen Yu couldn't help but smile bitterly. Then he carefully looked at the medicine bowl in his hand, and saw that the medicine bowl nei several medicinal materials were placed in it, and among them there were something like sand and gravel that was moist.

"Okay, isn't it just pounding medicine? I want to see what is famous!" Chen Yu muttered, holding the pestle in his right hand, and pounding it into the bowl lightly and heavily.

There was a dull impact on his hand, and the sound of pounding was like a cloth being torn, just like the sound on Mu Su's side.

"Huh?" Chen Yu raised his eyebrows, controlled the strength in his hand, and continued to pound a few times, the sound was like sand and gravel colliding, and he couldn't make Dou Qing's sound at all.

"It's a bit of a meaning!" Chen Yu picked up the medicine pestle and looked at the bowl for a while, only to see that the fresh herbs inside had been smashed and the slurry was overflowing, but those sand-like things were still intact.

Chen Yu's heart moved, and a gust of anger poured into his palm, wrapped the entire medicine pestle, and then smashed it hard.

While...... This time, there was a sound like the impact of gold and stones, but the sand and gravel in the medicine bowl were still intact.

And the strange thing is that the medicine bowl that looks like a wooden one is also intact and has not been smashed by Chen Yu's pound...... This shows that the material of this medicine bowl is extraordinary.

"Emery is the hardest kind of spiritual sand, if you want to grind it, in addition to the use of Linggang, you must also control your divine thoughts!" Dou Qing's voice suddenly sounded, and he said: "If you can make a post of Vajra San, the control of your Linggang and the tempering of your divine will will be good!"

Chen Yu looked at Dou Qing, who did not turn his head, still pounding the medicine pestle unhurriedly.

But the meaning of the reminder is still obvious.

"Spirit sand, is it the same refining material as Xingchen sand?" asked Chen Yu.

"Yes, it is very common for spiritual sand to be used in medicine!" Dou Qing still did not turn his head, and replied: "Emery is hard, it is the strongest thing, supplemented by green root grass, cloud aconite, rainbow shell powder, overlord branch, refining into a post of vajra powder and applying it to the surface of human skin for three days, which can make the skin as indestructible as emery!"

Unexpectedly, a post of King Kong San had such an effect, Chen Yu only felt a little eye-opening.

Compared to the Langya Sword Sect's Medicine Spirit Academy, Chen Yu's superficial ability to distinguish medicine and alchemy from the Blood Flame Emperor was obviously far from enough.

"Senior Brother Dou, how long have you been making medicine?" Chen Yu asked with a slight movement in his heart.

"Since childhood!" Dou Qing replied.

Chen Yu couldn't help but glance at Dou Qing when he heard this, from this concise answer, he could know that Dou Qing had been in the Medicine Spirit Academy since he was a child, and he should have been accepted as a disciple by Dao Hong very early.

"How long will it take for you to make a Vajra powder now?" Chen Yu continued to ask.

"Half a year!" Dou Qing was still pounding the medicine unhurriedly, but his answer was very natural.

Chen Yu couldn't help but be surprised.

Dou Qing, who started to practice medicine since he was a child, took half a year to make a post of Vajra San, which shows how difficult this Vajra San is.

"It seems that Daohong is deliberately embarrassing me?" Chen Yu thought in his heart and felt a little incomprehensible. It was the first time he and Daohong had met, so why were they embarrassed?

After a while, Chen Yu shook his head and smashed it wholeheartedly with the medicine pestle.

Since Dou Qing, who is a disciple of Dao Hong, can calm down and pound the medicine, and regard pounding 'Vajra San' as a kind of practice, Chen Yu has nothing else to do, so he doesn't mind sinking down to experience it.

Tuk-tuk, fluffy ...... The sound of three pounding medicines came and went, and the sounds were not the same.

At first, Chen Yu felt that it was difficult to concentrate, and every time the medicine pestle fell and made a screeching sound, his attention would be attracted by the impact sound, so that he gradually felt disgusted by the harsh grinding sound of emery.

The annoyance continued, and Chen Yu began to be confused.

After realizing that he was affected by the harsh sound, Chen Yu simply closed his eyes and no longer focused all his attention on the medicine bowl.

As a result, Chen Yu's heart was troubled, but his attention became inconcentrated, and all kinds of SI threads and thoughts came one after another, so that his sound of pounding medicine became weak and intermittent.

In the boring pounding of medicine, time passed, and Chen Yu once again focused on the medicine bowl nei, staring at the emery in the bowl, and began to control the aura of the mutant body nei, as well as controlling the strength and landing point of the medicine pestle.

The feeling of disgust reappeared, making Chen Yu's heart become agitated.

It seems that the medicine is very simple, but it is far from being as simple as it seems.

Chen Yu did not stop pounding the medicine, continued to change, and finally found the best strength and landing point at a certain moment, making the sound of pounding medicine no longer so harsh.

The feeling of disgust was reduced a lot, Chen Yu felt something, and subconsciously closed his eyes.

In each smashing sound, there is gradually a touch of charm.

Chen Yu suddenly found that as long as the mind is calm, as long as the emery is not forced, the process of pounding the medicine is not particularly difficult.

Time passed, and in the repeated sound of pounding medicine, Chen Yu felt more and more that the SI in his brain gradually became quieter, and there were no more distracting thoughts.

I don't know how long it has been, but at a certain moment, Chen Yu, who was closing his eyes, suddenly found that his consciousness had entered the space of knowing the sea.

In the sea of knowledge, the starlight is pure and pure, and Chen Yu 'saw' another self holding a medicine pestle under the stars, repeating the action of pounding medicine.

It's just that in the sea of knowledge, there is no sound of pounding medicine, but every time the medicine pestle falls, the starlight begins to turn, moving like a mist, and the whole is shrinking.

Suddenly, Chen Yu saw that in the starlight around another self, there were five ses of spiritual light merging into the starlight, constantly undulating and moving, and the five kinds of gold, wood, water, fire, and earth rose and fell like chao, forming a tight cycle.

Looking at this scene, Chen Yu was ethereal, he didn't have any superfluous thoughts, and he didn't feel that there was anything strange about this scene.

Until the medicine bowl, a red aura suddenly appeared.

At this moment, Chen Yu felt a strong spiritual movement, and then he woke up suddenly, and the other self in the sea of knowledge he saw and the entire space of the sea of knowledge disappeared together.

Chen Yu suddenly opened his eyes!