Sure enough, the next development of things was exactly what Du Ziyu expected.

From the second day, Lin Chengfeng's progress became slower and slower, and he spent a whole day practicing the entire seven furnaces of Qi Condensing Pill, but he only compressed the time by half an hour again, and completed the refining of the pill in two and a half hours.

The third day was even slower, shaving only a quarter of an hour shortened......

Probably due to the excessive consumption of spiritual power, on the evening of the third day, Lin Chengfeng did not continue immediately after practicing another furnace of Qi Condensing Pill, but took out a few high-grade spirit stones and recovered.

Du Ziyu shook his head, he understood that if this continued, it was probably impossible for Lin Chengfeng to fulfill his promise within five days.

I hadn't slept for several days, and Du Ziyu, who had been supervising Lin Chengfeng's alchemy, also closed his eyes and pretended to sleep.

I don't know how long it took, Du Ziyu noticed that there seemed to be movement in the Dan room in a daze, and as soon as he opened his eyes, he saw Senior Brother Chengfeng sitting in front of the Dan furnace suddenly slapped his thigh and shouted loudly.

"I'm enlightened!"

What have you realized?

Du Ziyu looked confused, and instantly woke up from his dazed state, and then saw Lin Chengfeng standing in front of the Dan furnace with a solemn face, stretched out his hand and slapped it heavily, and the huge Dan furnace that was as tall as the person flew up.

Immediately after, a crimson flame emerged from the void, turning into the form of a fiery dragon, circling around the Dan Furnace......

Lin Chengfeng stretched out his hand, and more than ten different spiritual materials popped out of the medicine cabinet and were thrown into the furnace one by one in order, as if they had been rehearsed thousands of times.

It's just the beginning to add Yellow Spirit Petals and Nether Flowers, isn't that right?

Du Ziyu was stunned for a moment, and then his pupils shrank, isn't this what the master did when he demonstrated just now? Could it be that Senior Brother Chengfeng is imitating?

But Du Ziyu knew very well that the master had so many bells and whistles before, just to look good on the scene, wasn't that bluffing?

Lin Chengfeng didn't know what Du Ziyu was thinking, so he urged the spiritual fire with all his strength and started alchemy with maximum power.

The spiritual materials in the Dan furnace became fragmented under the high temperature incineration, and all the impurities in it were stripped away, leaving only a few essences that slowly fused under Lin Chengfeng's control.

This process is extremely difficult, even the slightest mistake will be wasted, Lin Chengfeng's expression is tense to the extreme, although he has practiced thousands of times in the Dao space, but it is not easy to manipulate more than ten kinds of spiritual materials at the same time to make them fuse together in an orderly manner.

As the minutes passed, the Dan furnace began to vibrate continuously, as if it was under some kind of tremendous pressure.

I don't know how long it took, the lid of the Dan furnace flew out upside down with a "bang", and a round, blue-green, glass-like Bao Dan came out of the furnace.

Du Ziyu subconsciously turned his head and glanced at the timekeeping spirit device placed on the side, just one hour!

It really worked!

Du Ziyu felt dizzy for a while, and no longer dared to doubt the master's judgment, genius really can't be measured by common sense!

A few quarters of an hour later, Fan Tianzheng, who received the news, hurried over, and after seeing Lin Chengfeng's "achievements", the whole person collapsed.

He originally thought that his requirements for Lin Chengfeng were high enough, and even if the other party could achieve it, it would take at least a month or two of effort, and he would have time to take a good rest.

Unexpectedly, Lin Chengfeng not only really fulfilled his promise within five days, but he could still advance it?

That's outrageous!

Fan Tianzheng's whole body was numb, but in the face of Lin Chengfeng's expectant gaze and Du Ziyu's admiring gaze, he had to pretend to have an expected expression on his face.

"It's good, very good that you can complete my request in three days! Let's learn the refining method of the Purple Spirit Pill today......"

……

In the next two months, due to the almost stagnation of the Forging Dan Method, Lin Chengfeng put most of his energy into the study of the Dan Dao.

He had a hunch that he might be able to find a way to break through the Golden Dan Realm from the Dan Dao.

Fan Tianzheng taught more and more perfunctory, and sometimes even threw Lin Chengfeng a Dan book for him to ponder by himself.

Even so, in just two months, Lin Chengfeng still finished learning all the commonly used elixir formulas.

Fan Tianzheng was in a hurry, the other party had to hollow out his background if he went on like this, but in order to continue to round out this lie, he had to teach him hard.

"Chengfeng, you can learn three hundred commonly used spirit pills in just two months, which is much better than I expected, but the next pill I want to teach you is not as simple as before!"

Fan Tianzheng said very seriously, he decided to skip the remaining spiritual pills and teach directly from the holy products, he didn't believe it, a monk in the Ning Dan realm, without the power of the divine soul, could still practice the holy product divine pill?

Lin Chengfeng's expression was clear, and he became serious, no wonder the Dan prescriptions that Fan Tianzheng taught him before were so simple and easy to learn, it turned out that these were just some basic Dan prescriptions.

Fan Tianzheng said that, and handed over a jade slip.

Lin Chengfeng took it and checked it with his mind, only to find that it was a classic called "The Secret Record of Danhuo", which recorded one hundred and twenty-nine cultivation methods of Danhuo, some strong and some weak, and the three types of Danhuo with the highest cultivation difficulty were named Yimu Divine Fire, Nanli Open Fire and Netherworld Divine Flame......

Fan Tianzheng also explained at this time, informing Lin Chengfeng that this Dan Fire was one of the necessary conditions for refining high-grade pills.

After all, among the spiritual materials for refining the Holy Divine Pill, there were some heaven and earth treasures, and the corresponding medicinal properties could not be extracted from them by the fire magic method that he had cultivated alone.

"You can first choose a flame from this Dan Fire Secret Record to cultivate." Fan Tianzheng said slowly, but he didn't remind Lin Chengfeng that it was best to choose a slightly weaker Danhuo first.

In fact, if he could, he wouldn't want to teach Lin Chengfeng the art of Danhuo at all, but the head of Xuanwei would definitely summon this precious disciple from time to time, so this surface kung fu still had to be done in place.

Lin Chengfeng hesitated for a long time, and suddenly asked. "First seat, can I learn all these Danhuo? Wouldn't there be any conflict? ”

Fan Tianzheng was stunned for a moment, he originally thought that Lin Chengfeng would cultivate at most one of the three strongest Danhuo, but he didn't expect that the other party would be braver than he imagined!

Well, ambitious!

Fan Tianzheng secretly rejoiced in his heart, although this Dan Fire can play a big role in alchemy and against the enemy, but usually speaking, it is enough to practice the most suitable flame, and it is useless to learn more at all, it will only waste energy, and it will not be changed to play when alchemy, right?