For a full ten days, Chu Yunfan was like a sponge, frantically absorbing the knowledge in it, although a lot of knowledge and comprehension were basically just memorized, not fully comprehended.

But just memorizing so much knowledge is simply unimaginable for Chu Yunfan's help.

Chu Yunfan could feel that his horizons had been broadened many times because of this, and it was not at all comparable to the original.

This kind of gap in vision can't be reflected for a while, but Chu Yunfan's perspective on the problem is different from the original.

You can look at things from a higher, more completely different perspective.

This makes it easier for him to draw inferences from one another, and it is an extremely rare experience that records the comprehension of many masters of the Creation Realm.

This kind of is even a work that has taken countless painstaking efforts, and it is not a treasure that can be bought with money at all.

It can be said that with the codex and painstaking experience of these predecessors as the foundation, Chu Yunfan really has the foundation to make his combat power skyrocket to another level.

In just ten days, Chu Yunfan's harvest was even more than his own penance for several years, and even this harvest would continue to ferment over time, becoming the cornerstone of his march to a higher realm.

Ten days later, Chu Yunfan left the treasure house on time.

"This Chu Yunfan is smart, he knows that time is limited, compared to a certain martial art, the codex of those predecessors is the most important, a certain supernatural martial art, can also be exchanged for points outside, but these predecessors' codex is the essence of our Flying Immortal Sect's treasure house, and it can only be seen if you are allowed to enter here!"

"Yes, it's a pity, although he understands this truth, but the speed of this reading is too fast, it's like flipping through it casually, what the hell does he want to do? These ten days have been wasted, it's a pity!"

"I don't know what his idea is, the sect master puts hope on him, can it really work?"

The two elders were talking, as if they knew something.

At this time, Chu Yunfan had already left the treasure house of the book collection and went straight to the depths of the Flying Immortal Sect, the Phantom Moon Cave.

The Phantom Moon Cave is in a half-plane within the Flying Immortal Sect, and it needs to pass through a teleportation array to reach it.

Heavily guarded outside the Phantom Moon Cave, Chu Yunfan sensed that when he arrived, several powerful divine thoughts swept down, and after confirming that it was him, he turned his gaze away, these people were at least masters at the level of the Creation Realm.

Chu Yunfan was also secretly stunned in his heart, there were indeed masters in the Flying Immortal Sect, but because of this, it proved the important position of the Phantom Moon Cave in the Flying Immortal Sect.

"You have two months, just come out on time in two months, don't delay the time!"

An old but deep voice sounded in Chu Yunfan's ears.

"Understood!"

Chu Yunfan said lightly.

After stepping into the teleportation array, as soon as there was a flower in front of him, Chu Yunfan had already appeared in another space.

Everywhere there is an aura that has been condensed into liquid, which is very pure and almost does not need to be refined, and can be directly refined into the energy it needs.

This is very rare, you must know that even if it is the rich aura within the Flying Immortal Sect, for a master like Chu Yunfan, there are also impurities, and it needs to be refined before it can be used.

This is also why the spirit stone is a hard currency, because the aura contained in the spirit stone has already been combed again and again, and the purity is many times purer than the aura in the air.

However, the aura in the Phantom Moon Cave is different, these aura is not only extremely rich, but also very pure, and it surpasses the medium-grade spirit stone, which is equivalent to the purity of the aura in the high-grade spirit stone.

For the current Chu Yunfan, it is almost directly absorbed.

Chu Yunfan immediately found a place and began to absorb the aura that filled the sky.

Every time Chu Yunfan breathed, he could see that the countless spiritual energy around him was absorbed into his stomach like two long dragons.

It can be seen with the naked eye that Chu Yunfan's stomach directly bulged, and all the spiritual energy that he absorbed was concentrated in his stomach, and after a while, Chu Yunfan's stomach deflated again, and all these spiritual qi had been absorbed by him.

At the same time, the aura on Chu Yunfan's body was a little stronger.

"Sure enough, the purity is incredible!" Chu Yunfan said with a sigh.

Suddenly, Chu Yunfan's eyes flickered, and the environment around him changed dramatically, and a room full of modern atmosphere appeared in front of him.

"Brother, you're back!"

At this time, a crisp voice came from behind Chu Yunfan, but I saw that a girl was sitting in an electronic wheelchair and came to Chu Yunfan from the room.

This girl is obviously much smaller than her peers, but her face is a little optimistic and strong.

"Xuanxuan!" Chu Yunfan touched the girl's head, and a little nostalgia and pity flashed in his eyes.

"Now that you're back, wash your hands and get ready to eat!"

At this time, a woman's voice came from the kitchen, and a slender figure walked out with a pot of demon beast meat, but who was it not her mother Yang Yayun.

"I'm back!"

It was another middle-aged man's voice, but I saw that the door was pushed open, and a middle-aged man dressed as an office worker strode in, it was his father Chu Wencheng.

"Is there anyone at home today!" Chu Wencheng touched Chu Qingxuan's forehead with pity on his face.

Immediately, his eyes looked at Chu Yunfan and said, "What's the matter, how was the class today, what did you learn!"

"Dad, Mom, Sister, I miss you!"

Chu Yunfan only felt that his eyes flashed a little mist, even if he was faced with the situation between life and death, he had never shed a single tear, but now seeing these familiar faces appear in front of him, he still couldn't help but have a sour nose.

"Silly boy, what stupid things to say, think of us, just don't go!"

Yang Yayun said with a smile and put down the demon beast meat in her hand.

"I want to be with you too, I'll go back to you sooner or later, but not now, forgive me, Mom, Dam, Sister!"

Chu Yunfan immediately put away the missing in his heart.

He stretched out his hand in front of the three of them, and a violent mana surged out, instantly turning the picture in front of him into pieces, and his parents and sister also smiled in front of him, turning into a ball of light and dissipating between heaven and earth.

Chu Yunfan's eyes bloomed again, and he returned to the Phantom Moon Cave, just now it was just a picture of the evolution of the heart demon, not that he really returned to the Human Federation.