Compared with the common Dan furnace, there is an extra space in the middle of this Dan furnace, which is specially used to adjust the temperature in the Dan furnace, and the fire power of the Dan furnace is evenly controllable through the special mechanism inside. Although it may not be comparable to the effect of Changyan Wood, it is far above the ordinary Dan furnace.

Wang Zifeng was very satisfied, and he couldn't wait to use this new Dan furnace to refine the Dan.

Divine Doctor Bai saw Wang Zifeng's thoughts, and said with a smile: "All kinds of medicinal materials have been prepared, although there are still some medicinal materials that have not been found, but some of the ones you specified before have been found." ”

"Great. Wang Zifeng nodded and walked into the alchemy room specially prepared for him by General Wang.

A bunch of medicinal herbs were already placed there, waiting for Wang Zifeng to pick them up.

Wang Zifeng went over to check and made sure that there was no problem, and asked people to set up the Dan furnace.

Seeing the Dan furnace catch fire and the temperature gradually rising, Wang Zifeng said to the others: "I'm going to start alchemy, you guys go out first." ”

Doctor Bai nodded and said, "I wish you success." ”

General Wang didn't speak, smiled at Wang Zifeng, and walked out.

Nalan was really very curious about the alchemy of Wang Zifeng, but he also knew that he couldn't be disturbed at this time, so he walked away with interest.

Waiting for everyone to leave, Wang Zifeng closed the door and walked to the Dan furnace.

The fire source of the Dan furnace is the special charcoal of the military region, and the firepower is very strong, and it didn't take long for Wang Zifeng to feel a burning sensation that made people's skin hurt.

This special charcoal is very resistant to burning, although it does not reach the level of Changyan wood, but it can also last for about a day, if it is not for its scattered firepower, it is difficult to control, and it is also a good alchemy fire source.

However, now there is a special design of this Dan furnace, which complements each other.

When Wang Zifeng waited for the temperature to be about the same, he began to put materials into the Dan furnace, and there was a detailed record of this in Qinghuadan's prescription, and Wang Zifeng did not spend too much effort in this regard.

It didn't take long for Wang Zifeng to put all the medicinal herbs into it, even the most important Aoki Zhi. Except for the more special blood fire saffron.

Generally, when alchemy, all the medicinal materials must be put into the Dan furnace first, and the medicine will be refined into liquid, and the first step of alchemy will be completed. The Qingxin Pill and the Qi Renewal Pill that Wang Zifeng had refined before were all like this. However, there are exceptions.

In Qinghua Dan's prescription, the blood fire saffron has to wait until the second step of alchemy to make a paste before it can be put into the medicinal liquid.

This is the special requirement of Qinghuadan, and it is also a difficulty in refining Qinghuadan.

The liquid medicine has condensed the essence of the medicinal herbs into one, and it has regenerated its own spirituality. At this time, adding medicinal herbs to it will not only destroy this spirituality, but also cause great conflict, and there is a danger of frying the oven at any time.

Wang Zifeng has never actually operated it, and he is also very concerned about this issue, and he does not dare to be careless.

Finally. The refining of the medicine into liquid has been completed, and the medicinal materials in the Dan furnace have turned into cyan liquid medicine, full of spirituality. The spirit was extremely active, like a green dragon, ready to fly out of the liquid at any time.

This shows that the spirituality in the liquid medicine is extremely unstable and is in danger of dissipating at any time.

Wang Zifeng carefully controlled the yin and yang changes in the Dan furnace, waiting for the opportunity to put the blood fire saffron into it.

Only by adjusting the yin and yang in the Dan furnace to a relatively peaceful state can the blood fire saffron be put into it. Otherwise, you'll only get a bunch of dregs.

Wang Zifeng adjusted for a long time, and realized that he had controlled the yin and yang of the medicinal liquid in the Dan furnace, but suddenly found that there was green smoke in front of him.

The spirituality in the medicinal liquid turned into green smoke and drifted around.

Wang Zifeng was in tune with the situation described in the prescription, and he knew that he had spent too much time adjusting yin and yang this time, and the spirituality in the medicine had already dissipated on its own.

Wang Zifeng felt a pity, and as soon as he inhaled, he inhaled all the green smoke around him into his body, turning it into a rolling internal force in his body.

Although the medicinal power that can be obtained is very small, it is really a waste to watch these medicinal powers dissipate in vain.

Wang Zifeng carefully experienced the medicinal power of Qinghua Dan, which was not even a semi-finished product in his body, and felt that the internal strength of his body had increased a little.

This increase is so subtle that no one else would have noticed. Even so, Wang Zifeng was still very satisfied.

"Just a little medicinal power can achieve this level, if you refine this Qinghua Pill by yourself, your cultivation will definitely be able to improve by leaps and bounds. Wang Zifeng thought, cleaned up the Dan furnace, and started the second round of refining.

Soon, the disadvantages of not having a long flame wood were revealed.

Three times in a row, Wang Zifeng failed in continuous alchemy, which hit him hard.

Not only that, but three failures wasted his three Aoki Zhi and two Blood Fire Red Flowers. This made him feel distressed to death, and other medicinal materials were easy to find, but both of them were very rare.

Cleaning up his mood, Wang Zifeng continued the fourth refining.

After a while, it was time to throw in the blood and saffron.

Wang Zifeng's fingers lightly twisted on the pot of blood fire red flowers, picked a blood fire red flower, and threw it into the Dan furnace.

The blood fire red flower that left the branches and leaves seemed to be about to bloom all its vitality at this moment, reflecting the cyan medicinal liquid, like a flame.

This flame fell into the medicinal liquid, and immediately stirred up countless waves.

The yin and yang attributes kept changing in the Dan furnace, and the blood fire saffron exploded in an instant, merging into the medicinal liquid.

Countless bubbles suddenly bubbled out of the originally calm medicinal liquid, like boiling water.

Wang Zifeng knew that the critical moment had come, and the previous two times, he had been defeated in this place.

The yin and yang attributes in the liquid medicine were entangled, and he had to separate them in time and fuse them again.

Separation, fusion, these two steps must be completed in a short time. If it is only one of them, Wang Zifeng can still do it, but with the two, Wang Zifeng will be too late.

Although he had already exerted his speed to the limit, seeing that most of the time had passed, Wang Zifeng had just completed the steps of separation, and it was really beyond Wang Zifeng's ability to complete the fusion of yin and yang attributes in such a period of time.

"Isn't my strength enough to refine Qinghua Dan?" Wang Zifeng felt deflated in his heart, feeling unprecedented frustration.

He naturally knew that Qinghua Dan was not comparable to the Qingxin Pill and the Qi Continuation Pill, but he never imagined that there would be such a big gap.

Wang Zifeng thinks that his mastery of internal force has reached an extremely high level, if he can't complete the refining of Qinghua Dan in this way, how far can he succeed?

"Do you want me to cultivate the first volume of the Ten Thousand Medicine Divine Dictionary to the end of the world? But I refined the Qinghua Pill just to help myself cultivate the Ten Thousand Medicine Divine Book and hit the first volume of the Great Completion. Isn't this going to be an endless loop?"

Wang Zifeng muttered to himself, looking at the more and more bubbles in front of him, and almost foresaw the next picture.

The green gas drifted away, the liquid medicine was turbid, and turned into medicine residue.

This time the refining is going to fail again.