Han Feng forgot to sleep and eat, devoted himself to it, and finally solved the mystery after three days and three nights.

He was so excited that he immediately opened another furnace, and finally succeeded in refining this Chiri Pill through various mysterious techniques.

When this elixir was baked, the entire secret room was flooded with red light, and it was as brilliant as the scorching sun, and it actually had the legendary pill pressure.

Han Feng stretched out his hand and ingested it into his hand, and the power of the sun was slightly released, suppressing the pill contained in it, revealing its body, that is, an elixir like a fireball, crimson in color, emitting a blazing light, faintly surrounded by flames.

Han Feng looked up and down, there was still only a lotus pattern, but the medicinal power was already several times stronger than the Cabernet Pill.

He didn't hesitate at all, he took it again, feeling its flame-like medicinal power erupt, the effect was dozens or hundreds of times better than simply devouring those spiritual materials.

No wonder the elixir is so precious, and the status of the alchemist is so high, judging from this elixir, you can see the clues.

Han Feng did not stop the pace of refining the elixir, and continued to overcome difficulties and improve the refining method of the six-pin pill.

When he refined the seven-grade pill, he also concocted it in the same way, first forcibly refining a semi-finished product, and then carefully studied the medicinal power composition structure of this pill, and reflected each other with the method of Fu Dan turning lotus, and found out the way to crack it, and sure enough, it didn't take much time, and he successfully refined the seven-grade pill Miao Mu Dan.

This pill released an azure light, and the moment it came out, it made the entire secret room feel like it was in a vast ocean, and the pill pressure was even stronger, even Han Feng felt a slight squeeze.

He was extremely happy, not because he had refined the Seven Rank Pill, but because he had found his own way of refining, and this half-finished product reversal method was enough to benefit him for a long time.

He was also not polite, he swallowed this pill directly, and felt its medicinal power carefully, and sure enough, it was several times stronger than the Chiri Pill, and it was already able to make his body have a good reaction, and a trace of dirt was excreted again, which really shocked him.

"Well, this pill has the effect of washing the muscles and cutting the marrow!" Han Feng was extremely satisfied, and couldn't help but praise it.

Then, he opened the furnace to refine a few Miao Mu Dan, swallowed them all, and until it no longer had any effect on it, he stopped and began to refine the eight-rank pill Yun Fang Dan instead.

He still used the same method, but this time it didn't work, and he couldn't force out a semi-finished product of Yun Fangdan with his soul power cultivation, he could only boil it slowly, and find out the rules from it through massive practice, although this efficiency was very low, but it was the most secure.

He was patient, opened the furnace again and again, and each time ended in failure, he was not discouraged at all, kept trying, continued to accumulate experience, and was stunned at the ninety-ninth time, and successfully condensed a pill, although there was no lotus-like pattern, but it was finally formed, which made him happy.

He immediately took it out and hovered it on his chest, unleashing his soul power to study it carefully, not letting go of any detail.

Han Feng's half-finished product reversal method finally came into use again, and in less than an hour, he successfully solved many problems of Yun Fangdan, and basically mastered its medicinal power structure.

He opened the furnace again, but this time it was still unsuccessful, and he still only refined a pill without patterns.

If you look at the methods of other schools, this can be regarded as a successful Dan, but it falls on the Fu Dan Lotus Method, but it is only a semi-finished product, and at least there must be a lotus pattern to be called Cheng Dan.

Han Feng thought about it, pondered carefully, repeatedly deduced, increased the output of the three-color fire, and finally succeeded in refining the Yun Fang Dan with a pattern three days later.

"Understood, the medicinal power of the Eight Pins Pill is much stronger, I have to adjust the firepower output accordingly!" Han Feng suddenly realized at this time, and involuntarily patted his head.

He took this Yun Fang Dan and couldn't help but be shocked, the medicinal power of this pill had reached a level comparable to that of the Nine Grades of Medicine, it was simply a qualitative change, it turned out that alchemy still had such a miracle, turning decay into magic!

Of course, this is just an exaggeration, in fact, the raw materials of Yun Fang Dan are not weak, they are all eight-grade spiritual materials, after various combinations, and after the addition of three-color fire, it is not surprising that the final medicinal power is stimulated to that extent.

Han Feng became more and more interested in alchemy, and he was full of energy at this moment.

In the next half an hour, he successfully refined several Yun Fang Dan, but he didn't continue to take them, but put them all away, just in case of emergency, this pill is a kind of healing medicine, and it can play a big role at a critical time.

Then he began to study the Nine Pins Dan Fang, and only after seven days did he begin to practice it.

Han Feng turned on the ground fire and controlled the three-color fire to disperse, three clusters of flames of different colors were separated, burning fiercely, and the scorching fire power overflowed through the Dan furnace, making the temperature of the entire secret room rise a lot, and it was extremely hot.

With a twist of his hand, he took out a nine-grade elixir and dozens of eight-grade elixirs from the storage ring, and successively sent them into the Dan furnace, where they were calcined by the three-color fire, and after a while, they turned into fluids, floating on the Dan furnace, ups and downs.

Han Feng's hands flew with magic tricks, and one after another punched in one after another, urging the three-color fire to refine those spiritual materials, remove the impurities inside them, and activate their medicinal power.

He was seriously changing various techniques, and even added the method of drawing talismans again, doing his best to build the spiritual material liquid into the form of a lotus flower.

However, this form lasted only ten breaths before it collapsed on its own, turning into a puddle of residual liquid again, and even began to turn black.

Han Feng was a little unwilling, and wanted to save it through some magic tricks, but no matter how he operated, he couldn't turn the tide, and the pool of residual liquid couldn't condense again to build a lotus form.

He had no choice but to give up, and let the three-color fire incinerate the liquid medicine, and black smoke rose, and the smell spread out, filling the room with a fishy smell.

Han Feng was a little distressed when he saw it, this was a nine-grade medicine, but it was hard to find, and sometimes it was not possible to buy spirit stones in the outside world.

He didn't dare to try it anymore, he had to solve the problems that had just appeared in the refining process one by one before he could continue to practice, otherwise no matter how much Nine Rank Great Medicine he had, it would not be enough for him to squander.

He plunged headlong into this research, completely oblivious to the passage of time.

In fact, he didn't care if the trial time was over now, anyway, when he entered the Great Power Cave Mansion, he knew that he would not be able to get out for a while.

Originally, he still wanted to rush to that time, but later he realized that in this powerful cave mansion, his Dachuan City token must not be able to teleport him out.