After a busy day, even a character like Zuo Feng was tired and couldn't support it.

"It's really better to have a big fight with people, it's more enjoyable, I didn't expect that doing business turned out to be such a tiring thing."

Zuo Feng complained in his heart, and at the same time deeply realized that he was indeed not a businessman's material. Therefore, the day after the auction, he completely handed over the matter of the trading house to the invited Boss Zhong and the five elders, and he also had to start making some preparations for the upcoming trial.

If you want to improve your strength in a short period of time, in addition to practicing some powerful martial arts, you can only use some drugs to make yourself in the trial and add some self-protection power.

Although the old man did not say what benefits the "Spiral Tower Trial" could gain from each floor. But Zuo Feng vaguely guessed that the rewards that could be placed in the five-year county trial competition would inevitably be some rare things.

He had just improved the bone refining period for a short time, and his cultivation was basically hopeless in a short period of time, but even if he had a way to improve his cultivation again, Zuo Feng would not do that, and he still understood the reason that it was too much. Therefore, in terms of cultivation, Zuo Feng still chose to stabilize temporarily and focus on refining medicine.

For the art of pharmaceuticals, he spent almost all his energy and time on it during the waste period of that year. Although Zuo Feng is very interested in the art of alchemy, he is really lacking in skills during this time. Now that the trading house is on track, I have the time and energy to study it.

For the primary medicine mixing technique, Zuo Feng had already learned from Zhuang Yu, although he couldn't achieve Zhuang Yu's excellence, but he barely reached the level of an alchemist's apprentice. His goal now is to prepare to start making some medicinal powders, as long as he can successfully refine the finished medicinal powders, he can be regarded as reaching the level of a junior pharmacist.

Those prescriptions for medicinal powder, Zuo Feng had seen them in the Tiangong Refining Medicine Shop, but each of them was expensive and scary. Although Zuo Feng is now considered to have some net worth, he still doesn't want to spend all his money on those prescriptions.

He had found a "Primary Medicine Refining Experience" in the underground secret room of Jinyan Mountain before, and several good prescriptions were recorded on it. Zuo Feng decided to use the prescriptions recorded in this book to practice first, as for the medicinal materials, Zhuang Yu also had some there, and he could go and use them at any time.

There is still a courtyard left in the backyard of the shop, and although his own home is also a good location, he still knows his quirky sister very well. If he concentrates on refining alchemy, he must avoid this "little monster".

Therefore, Zuo Feng only explained to the five elders, and then cleaned up a relatively secluded room in the courtyard and prepared to use it for his own alchemy.

The medicine furnace himself had bought one, so after retrieving the medicinal materials from Zhuang Yu in the old shop, Zuo Feng locked the door from the inside and began to refine the medicine powder.

There were not many prescriptions recorded in Zuo Feng's book, and after he briefly read the effects, he picked out two of them. One is the "Fu Ling San" which is mainly used to restore aura, and the other is the "Hui Li San" which is mainly used to restore physical strength. Both of these potions will be extremely useful for coping with the next "Spiral Tower Trial".

Sitting down cross-legged on the ground, Zuo Feng calmed down a little bit of excitement first. Unlike the previous mixing of medicines, refining powder requires absolute mental concentration. Zuo Feng's palm was close to the ground, mobilizing his mental power to inject into the Najing in his palm, and then, as if conjuring, piles of medicinal herbs and a delicately shaped medicine furnace appeared on the ground.

After doing this, Zuo Feng slowly took out a small bag from his arms, and opened it to reveal tiny blood-red crystals. As soon as he saw this blood-red crystal, Zuo Feng frowned slightly, because just such a pack of crystals would cost him almost all his gold coins.

This blood-red crystal is called the Yan Crystal, because it is only produced in the Xuanwu Empire, so the price of Yancheng, which belongs to the Yelin Empire, will be relatively expensive. If this flame crystal is fed into the aura, it will emit an extremely huge amount of heat, and ordinary medicine refining or qi refining rely on this kind of flame crystal to complete.

Zuo Feng picked out a flame crystal from it and threw it into a hole at the bottom of the medicine furnace. Then Zuo Feng put his hand on a bulge on the side of the medicine furnace, and as the spiritual energy was sent out from the palm of his hand and injected into the furnace, a scorching sensation was transmitted from the medicine furnace.

Seeing this, Zuo Feng smiled slightly, took a misty wood flower from a pair of medicinal herbs next to him, and put it into the medicine furnace casually. This kind of relying on the medicine furnace to refine medicine is much simpler than his previous method of mixing medicine.

Before, because Zhuang Yu couldn't practice refining the body, he naturally couldn't refine medicine in the medicine furnace, and what Zuo Feng had learned at the beginning was also this method of mixing medicine. If the drug is made as before, the process is much more complicated, and the drug is not only time-consuming and laborious to make after many tedious processes such as cooking, drying, grinding, and picking, but also requires extreme care and patience of the person making it.

Most of the people who practice medicine refining have a certain amount of cultivation themselves, so this most primitive method of medicine is almost impossible to see again. After all, the mixture that took so much time and effort to make was not as good as the medicine powder that a junior alchemist could refine through the medicine furnace.

However, it is undeniable that there are some esoteric pharmacology in the most primitive pharmaceutical mixing method. This kind of learning from the most basic, although it seemed to have taken some detours before, but after the passage of time, Zuo Feng deeply understood how important the foundation that Zhuang Yu laid for him at the beginning.

Zuo Feng looked happy at this time, watching the misty flowers jumping in the fire, as if they were dancing. Tiny mucus is grilled, and then the mucus grows more and more. At a certain moment, Zuo Feng waved his hand and threw in a hundred bud vines, and then began to stare at the changes in the furnace.

The liquid refined from the previous misty flower hovered around the edge of the furnace like crystal droplets. At this time, Zuo Feng had to control the aura, moving the liquid away from the flames a little, and at the same time not allowing the temperature to drop too low and solidify. In addition, it is necessary to continue to refine the bud vine that has just entered the furnace, which is no longer just a distraction.

At this time, Zuo Feng's "Cloud Wave Palm", whose cultivation had been fruitless, played a role at this time. Distracted and used to control multiple aura, Zuo Feng still felt at ease.

Zuo Feng, who was refining the medicine, suddenly felt as if he had entered a mysterious state. The small medicine furnace in front of me is like a special world, and the fire in the furnace is like the earth that gives birth to all things, and the medicinal herbs that are constantly jumping in it are like creatures in this small world.

At this moment, Zuo Feng felt that he was the creator of this small world, and the life and death of this world in his palm made Zuo Feng a little excited. But before he could deeply comprehend the mysteries, a slight explosion came from the medicine furnace.

The budding vine that was being smelted and the sap of the maze flower extracted before were both scrapped with the explosion just now. Zuo Feng shook his head with a wry smile, but his emotions at the moment were still in the joy of tasting the medicine for the first time.

Not in the slightest blow of defeat, but quickly poured out the scrapped residue. After checking that there were still a lot of flame crystals left in the furnace, he took another Misty Flower from his side without stopping, and began to refine it again.

With Zuo Feng's unremitting efforts, there was finally more residue around him. And he has not succeeded in making a medicine powder so far, which makes Zuo Feng's enthusiasm and interest also wear out. But Zuo Feng never had the slightest idea of giving up, after all, it took him almost a month to learn how to mix medicines, and he could barely make a packet of usable medicinal powder.

In this way, Zuo Feng entered a state of madness, and in addition to sleeping and restoring his aura, he spent all his time refining medicines.

On the evening of the fourth day, Zuo Feng looked at the last iron-hearted grass in the medicine furnace after refining. His eyes couldn't help but fuse slightly, this was the first time in four days that he had successfully refined all the medicines, and the next thing was to fuse all the previously refined medicinal liquids together.

At this time, Zuo Feng even tried to slow down his breathing, and his hand pressing against the wall of the furnace couldn't help but tremble slightly, and it was not clear whether he was excited or afraid of failure. Under his gaze, the colorful liquid slowly gathered towards the middle of the medicine furnace, and the flames became much milder than before under his control.

If he was an intermediate alchemist here, he would definitely scoff at Zuo Feng's approach at this time, because Zuo Feng actually carefully controlled the fusion of the medicinal liquid in pairs. If it is a junior alchemist with some experience, at this time, they will use the method of fusing all at once. Because all the materials used in the production of primary medicine powder are extremely stable and mild medicinal materials, unless there is too much error in fusion, there is no possibility of failure at all.

But Zuo Feng didn't know anything about it, so he carefully fused all the medicinal liquids together little by little, until all the medicinal liquids merged into a dark green medicinal liquid, and then he dared to take a light breath.

Then he hurriedly wrapped the liquid medicine with aura, and a new stream of aura was sent, and the liquid medicine automatically flew out of the medicine furnace. Zuo Feng hurriedly caught the liquid medicine with a jade bottle.

If you want to achieve the best medicinal effect, it is natural to continue to condense it immediately after refining the medicinal liquid. However, Zuo Feng cautiously took out the medicinal liquid, and at the same time meditated to recover some aura, and then continued the last step of the production of the medicinal powder.

When the liquid medicine that was thrown into the furnace slowly turned green in the flames, Zuo Feng knew that he was finally done. Then he took out a piece of oiled paper and poured the refined crystals into it.

There was still some warmth left on the medicinal powder at this time, looking at the surface of the crystal with a slight sting, Zuo Feng knew that his refining this time could only be regarded as a reluctant success.

Gently dipped a little green crystal with his fingertips, Zuo Feng first put it on the tip of his nose and smelled it, and a faint fragrance came into his nose. Zuo Feng smiled slightly, put the fingers stained with crystals in his mouth, and swallowed a mouthful of saliva mixed with medicinal powder into his stomach with a roll of his tongue.

After not doing much, Zuo Feng felt a warm sensation in his lower abdomen. Then a trace of spiritual energy jumped out of the viscera, and the small part of the spiritual energy that had just been consumed by refining the medicine also recovered quickly under the effect of the medicine.

[This book was first published from 17k, the first time to see the genuine content!]