Regarding Chen Feng's retreat, the sixth-level alchemist of the Hua family didn't have any idea, but the sixth-level alchemist of the Zhang family became more and more disdainful in his heart.

He didn't believe that Chen Feng could comprehend the level of retreat in just three days. Chen Feng's announcement of the retreat to the outside world was most likely just an illusion, and the purpose was to make the monks in the outside world think that he was just gifted with demons.

However, since he has obtained the inheritance jade slip of the Zhang family. The alchemist of the Zhang family naturally didn't want to stay in the Hua family for long, so even if he left the Hua family with the inheritance jade slip, he went to think about Zhang Chao's report.

Zhang Chao listened to this person's report, and only smiled coldly, and looked down on Chen Feng a little in his heart.

Although this person is evil, he is still young and vigorous after all, thinking that this will make people think that he is demonic enough, but as everyone knows, this retreat has exposed his lack of confidence. Rising Tide smiled coldly, and couldn't help but be happy in his heart.

After all, Chen Feng is too demonic, and there will be extremely huge pressure on the Zhang family, and now this is normal.

However, there are also people in the Zhang family who are not happy because of Chen Feng's retreat. This person is Zhang Minghao. He had already made up his mind to kill Chen Feng, but when he heard that Chen Feng was actually in retreat, he immediately flew into a rage.

"Chen Feng, no matter how long you are in retreat, I will break your body into ten thousand pieces!" This was Zhang Minghao's crazy shout, but no one could hear the black-robed old man standing on the side.

......

At this moment, Chen Feng is still in the Tiandan Immortal Mansion.

Before, he calculated the right time to stop, handed over the Zhang family's inheritance jade slip to the maid who was waiting outside, and then instructed the maid to declare to the outside that she wanted to retreat.

Then, he entered the Heavenly Pill Immortal Mansion again and entered a long retreat.

This time, the understanding of the Zhang family's inheritance of jade slips gave Chen Feng a lot of experience and understanding of Dandao. At present, these understandings are only superficial. If you want to fully understand and draw inferences from one another, you also need Chen Feng's continuous understanding and experimentation.

Tian Danding had already been summoned by him, and in the Danding, Xuan Lonely Purple Flame was burning violently.

Chen Feng meditated hard, and every time he gained a little, he would stop and confirm it.

The time flow in the Time Acceleration Great Array was fifty times faster than that of the outside world, and in one day in the outside world, Chen Feng had been practicing in the Heavenly Pill Immortal Mansion for fifty days.

Spring goes to winter, flowers bloom and fall, and the outside world has passed a full three years.

In the past three years, Chen Feng has not been out of the customs. In the outside world for three years, he had been in the Time Acceleration Formation for a full hundred and fifty years.

For a monk in the immortal realm, one hundred and fifty years is really nothing. For those who are truly powerful, just one retreat is thousands of years, and even for ordinary immortals, it is normal for a retreat of hundreds of years at a time. There are even some people who have been in retreat for thousands of years in order to break through the realm.

On this day, Chen Feng woke up. Before he knew it, his hair had dragged to the ground. He couldn't remember how many times he had repaired his hair during his retreat.

"Finally, this harvest has been fully integrated!" Chen Feng showed a smile on his face, and then pinched his fingers, his face suddenly a little surprised: "It is said that cultivation has no time, this sentence is really true! In the blink of an eye, one hundred and fifty years have passed." ”

"In the past one hundred and fifty years, my Dan Dao level can be said to have risen in a spurt, and now I will not be too tired to comprehend the inheritance of the Demon Lord, but the Dan Dao inheritance of Taiqing Dao Tianzun is still like chewing wax, and most places can't read it at all. Chen Feng frowned, thinking in his heart.

But soon, his brows widened, and he smiled self-deprecatingly: "Who is Taiqing Daode Tianzun, that is the ancestor of the Dan Dao in the immortal realm." If his inheritance could be comprehended by me so easily, then he would also be called the ancestor of the Dan Dao. ”

The next moment, an ancient book fell into Chen Feng's hand, but its unpretentious appearance exuded a heavy and eternal atmosphere.

"The last pill on the first page of the Heavenly Pill Record, I have never had the opportunity to refine it, but now that my Dan Dao has made significant progress, it is time to try refining this elixir. Chen Feng's face showed a look of anticipation.

Each of the pills recorded in the Tiandan Records was extremely precious, and it was extremely helpful to Chen Feng. This time, Chen Feng's gaze was once again focused on the third elixir above.

"Ten Thousand Alchemy Pills, integrating the spiritual energy of all things in heaven and earth into one furnace, washing away impurities, enhancing physical fitness, increasing cultivation, and strengthening divine consciousness, it can be described as invincible!" This is a text above the Tiandan transcript, describing the use of Ten Thousand Alchemy Pills.

In Chen Feng's words, this ten thousand alchemy pills should simply not be something in this world. The effect of this medicine is simply against the sky!

However, at the same time as the powerful medicinal effect, the difficulty of refining the Ten Thousand Alchemy Pill is far greater than that of the previous pills, and it is only now that Chen Feng has absolute confidence in refining this Ten Thousand Alchemy Pill.

"Anyway, it's been a hundred and fifty years, and it's not bad to say that it will take a few years, so let's just refine the Zewan Alchemy Pill today." Chen Feng's mind moved, and one after another aura of the elixir flew over and suspended above Chen Feng's head.

"Fortunately, thanks to the Demon Lord's Tomb and his party, I was able to gather the amount of elixir. Chen Feng looked at the elixir flying in the sky and muttered to himself with emotion.

As the name suggests, it is necessary to gather 10,000 kinds of elixirs in a furnace, slowly calcinate them with a flame, and use a specific method to fully integrate these 10,000 kinds of medicinal materials to achieve the potential of water melting, and then produce qualitative changes, and finally achieve 10,000 alchemy. Although this process is only a few words, it is enough to make most alchemists sigh with admiration.

In general, alchemy is often three or four kinds of main medicinal materials, and dozens of other secondary medicinal materials, which are fully dissolved and merged into a furnace of elixir. Even if this is the case, the alchemist also needs to spend a lot of energy, not to mention that if ten thousand medicinal materials are smelted at the same time, the energy required is definitely thousands of times more than that of ordinary pill refining.

As soon as the Ten Thousand Alchemy Pill was opened, Chen Feng felt a bit of difficulty. At the same time, controlling the flame to smelt ten thousand medicinal herbs is too difficult. After all, the melting point of the medicinal materials is different, the same flame, the medicinal materials here may be burned, and the other side may not be dissolved. Only by carefully controlling the temperature of each medicinal herb at the same time can we ensure that this furnace of elixir will not fail.

However, it is not Chen Feng's character to retreat in the face of difficulties, the more challenging it is, the stronger the refusal to admit defeat in Chen Feng's heart!

Under Chen Feng's careful control, this furnace of ten thousand alchemy pills finally succeeded in opening the first step, and the medicinal herbs slowly melted. Due to Chen Feng's careful refining, the melting speed was very slow, but since it had already begun to melt, it was only a matter of time before the elixir was completely dissolved.