Zhou Wu estimated that at the current rate of consumption, his spiritual power would be able to support at least three to four hours.

Sure enough, the more difficult problem in the eyes of ordinary alchemy apprentices was self-defeating in front of Zhou Wuxiong's spiritual power foundation.

Of course, the temperature and size of the flame need to be constantly adjusted using spiritual manipulation, and the three to four hours just mentioned is only an approximate estimate, not accurate.

Seeing the spiritual power flames circulate in circles under the Dan furnace, steady and gentle, Zhou Wu nodded, and the step of making a fire was completed.

The third step is to extract the medicinal solution.

It is impossible for every part of the medicinal herb to be useful for alchemy, so the purest liquid needs to be extracted before it can be used for alchemy.

The process of heating the medicinal materials through the spiritual fire, steaming out the medicinal liquid, and then wrapping it with spiritual power and putting it aside is not simple, and the proficiency and operation accuracy of the spiritual power are very high. At the same time, it is also necessary to accurately control the temperature and time of the flame, which is also one of the reasons why ordinary flames cannot be alchemized at all, and ordinary flames cannot be manipulated by alchemists at will like spiritual fire.

If the temperature is high and the time is long, the herbs may be dried and baked, and if the temperature is low and the time is long, the required liquid medicine may evaporate to the air and be volatilized and wasted. Only when the temperature and time are all just right, can the liquid in the medicinal materials be extracted to the greatest extent without the slightest waste.

Zhou Wu first chose a vermilion grass.

Originally, a furnace of Qi Gathering Pill only needed one Zhu Ling Grass to be enough, but Mo Lao gave Zhou Wu three materials, so now Zhou Wu has three Zhu Ling Grass in his hands.

"Bang!"

A drop of pale green medicinal liquid gradually fell from the vermilion grass and dripped into the small bowl that Zhou Wu had already prepared, and at the same time, an incomparably fresh aura permeated the entire alchemy room.

It's done!

The original dark green and fresh vermilion grass has turned yellow at this time, and it is no longer as bright and shiny as before. A whole plant of vermilion grass can only extract such a drop of medicinal liquid. This drop of liquid is its essence, and if you strip it out, you will naturally lose that trace of spirituality.

A cultivator who had just enlightened his mind succeeded in extracting the medicinal liquid for the first time, which seemed to be impossible in the eyes of ordinary people. No matter how talented you are, it takes a long time to accumulate experience to be able to control your spiritual power so precisely. In the realm of Zhou Wu, it is simply impossible.

However, Zhou Wu was an exception, although his current realm was only in the refining realm, he actually had thousands of years of cultivation experience, and in terms of the accuracy of the manipulation of spiritual power, he was no worse than ordinary True Spirit Realm cultivators.

The reason why Zhou Wu was able to succeed at one time was not only because of this reason, but also because he had cultivated the "Ancient Soul Refining Technique" to cultivate divine thoughts, and his perception of the surrounding things was far better than that of others.

Second, third, fourth...... The seven medicinal materials were all extracted by Zhou Wu.

Even the simplest Qi Gathering Pill requires seven kinds of medicinal materials to be refined, which is enough to see that the position of alchemy is not easy.

The seven small bowls are lined up, containing the seven kinds of liquid medicine that have been extracted, and the next thing is to fuse the seven kinds of liquid medicine extracted together for alchemy.

The medicinal properties of each herb are different, some are hot and some are cold.

The fusion liquid is to adjust the yin and yang balance of the medicinal liquid, adding yin attribute herbs when there are many yang attribute herbs, and adding yang attribute herbs when there are many yin attribute herbs.

If there are too many yang attribute medicinal materials or too many yin attribute medicinal materials, it will cause the elixir to be unshaped, and the pill will be turned into a beast pill at the least, or it will be directly fried in the furnace.

Although the process of alchemy is very important step by step, and every step is not simple, many alchemists call this step of fusing the medicinal liquid the most difficult step in alchemy.

The description of this step on the yellow paper given to him by Mo Lao was also extremely detailed, and a total of twenty-eight steps were given for this fusion elixir, which could be reduced to thirteen steps at most if he was skilled.

Zhou Wu used his spiritual power to lift one of the yang attribute and one of the yin attribute medicinal liquids into the air and gather them together.

This is the first step described on the yellow paper, which is to fuse the two medicinal liquids with the strongest yang attribute and the strongest yin attribute together.

"Boom!"

Zhou Wu originally wanted to continue to manipulate these two to fuse them perfectly, but he didn't expect that the two medicinal liquids would explode violently as soon as they touched them.

The blazing wave of qi knocked Zhou Wu, who was standing in place and was engrossed, to the side at once.

Zhou Wu was a martial artist of the Internal Force Realm, so this kind of explosion would naturally not hurt him much, but his mood was very uncomfortable.

The mixture of the two medicinal liquids exploded directly.

He obviously mixed the two medicinal liquids exactly according to the instructions on the yellow paper, how could it explode directly?

Could it be that the purity of the medicinal liquid he extracted was not enough? He immediately denied this idea, if he couldn't extract the medicinal liquid that reached the standard with his spiritual power manipulation ability, then I am afraid that only a cultivator with a flower would be able to refine the pill, which was obviously impossible.

There is a problem with the yellow paper tutorial, and the pill can't be refined at all according to the instructions? However, Mo Lao doesn't look like that kind of person, not to mention that if he really doesn't want to teach Zhou Wu alchemy, just don't teach it?

Zhou Wu thought about it again before he figured it out,

There should be no problem with the analysis on the yellow paper, and his medicinal solution should also be qualified, it should be that there was a problem when he fused the medicinal solution.

One yin and one yang, two medicinal liquids, there is no problem with mixing directly, but Zhou Wu mixed it too quickly, mixing the amount of the two medicinal herbs completely and quickly, if the two are slowly fused and infiltrated into each other, it should not explode.

Zhou Wu thought about it for a while and felt that it was the problem here.

His mind moved, and he read the file.

Although Mo Lao gave him three medicinal herbs, and he still had two medicinal herbs that he did not use, he did not choose to continue, but chose to read the file.

Now that there is a door to "save and read", Zhou Wu naturally wants to strive for perfection in everything, even if it is a failure, Zhou Wu does not want it.

Zhou Wu's eyes opened and returned to Mo Lao.

"Okay, in fact, there is a step of identifying and selecting medicines before alchemy, this step can be omitted, I will directly give you all the medicinal materials you need. The storage ring on Mo Lao's right hand flashed, and there were seven more kinds of medicinal herbs of different shapes and an old piece of yellow paper in his hand.

"This is the explanation that records the refining method of the Qi Gathering Pill. Mo Lao handed the yellow paper to Zhou Wu, and then said: "I can give you the Seven Treasure Xuantie Alchemy Furnace of the Thunder Fire Sect, compared to the ordinary steel alchemy furnace used in the normal assessment, it can add one percent more chance of becoming a Dan out of thin air, you can rest assured, I will never embarrass you." ”