Zhang Hexuan looked at the evolution crystal in Chen Fei's hand and nodded, and also took out an irregular crystal emitting red light from his trouser pocket.

The evolutionary crystal in his hand, whether it was the red light emitted or the size, was obviously more than the one in Chen Fei's hand.

Chen Fei's gaze froze, what Zhang Hexuan had in his hand was a second-level evolution crystal, and as a result, he took it out like that, looking at Zhang Hexuan's expression, this thing was only stronger than a glass marble in his eyes.

"This kind of crystal, we did find a lot in the body of the mutant zombie we killed, but we didn't know what it was used for" Zhang Hexuan said with a calm expression, he was already able to guess at this time that the crystal in his hand had some secrets.

Chen Fei retracted his thoughts and continued:

"We call the crystals in this mutated corpse evolutionary crystals, I think with your current strength, you should be able to feel that there is a kind of energy contained in it, this energy is violent and evil, we can't directly absorb it at all, but in the laboratory set up in the safe zone, we have researched a way to purify, which can refine the pure energy in these evolutionary crystals and make it into a potion, that is, the evolution potion in my hand, this thing can be said to be of great significance to the evolutionary!"

Zhang Hexuan once again focused his gaze on the metal elixir in Chen Fei's hand, and his face was groaning.

"Even if I say it, I don't have as much experience as you can experience it yourself, and then you will naturally know the value of this potion!"

Chen Fei said and directly threw the evolution elixir in his hand to Zhang Hexuan on the opposite side, Zhang Hexuan subconsciously reached out to catch it, and his eyes shifted from Chen Fei's body to the small injection in his hand.

"You are a second-level evolutionary, as long as you feel carefully, you will be able to sense the pure energy inside, and then you will have a feeling that all the cells in your body are desperately craving."

Everything is as Chen Fei said, when the evolution elixir is in hand, he can clearly feel the restlessness of his body without Zhang Hexuan's careful induction, which is a strong desire for the medicinal potion in his hand.

Chen Fei knew the truth of being too late, he was afraid that he would be too eager and make the other party suspect that he had any plans, so he just smiled when he looked at Zhang Hexuan, who was hesitant.

After a moment's hesitation, Zhang Hexuan injected the evolution potion into his arm.

A few seconds later, Zhang Hexuan's eyes widened violently, his fists were tightly clenched, and his body trembled slightly, and the painful feeling of ice and fire in his body made him subconsciously think that he had fallen into Chen Fei's trap.

Chen Fei hurriedly signaled Zhang Hexuan to relax, and explained with a smile:

"The first time you inject the Evolution Potion, it may feel a little sour, or a little painful, but you will soon feel like you are bitter!"

The corners of Zhang Hexuan's mouth twitched, Nima! Is this called a little bit of pain?

But soon Zhang Hexuan's expression changed again, and his face was full of shock!

After experiencing the initial pain of the two heavens of ice and fire, it could clearly feel that the physical strength it had just consumed was recovering at an accelerated pace, and the feeling of physical fatigue was swept away.

What made Zhang Hexuan uneasy the most was that he felt that the cells in his body seemed to be cheering, and after absorbing the energy contained in the potion, they were accelerating their growth! Become stronger and more energetic.

In the past two days, all kinds of restlessness and discomfort in the body after the breakthrough of his ability have all disappeared with the injection of a medicine, Zhang Hexuan's face has an unconcealed joy, and his body has begun to tremble irrepressibly.

Seeing this change in Zhang Hexuan's expression, Chen Fei's heart knew that a big customer was coming to the door!

As Chen Fei expected, Zhang Hexuan raised his head happily and asked impatiently:

"This ..... Can you get this evolution potion by going to a safe zone? ”

It's no wonder that Zhang Hexuan reacted like this, as long as he is an evolutionary, he can clearly understand the importance of evolution medicine to evolvers after being injected with evolution medicine, which is related to the rapid improvement of strength, just the rapid recovery of physical strength, which will also make many evolutionaries flock to it.

At the critical moment of the battle of life and death, if there is such an evolution potion that can instantly restore physical strength, it is equivalent to one more chance to resurrect on the spot.

Chen Fei patiently introduced to Zhang Hexuan the conditions for exchanging evolution elixirs in the safe zone, first of all, to obtain the identity certificate of the evolutionary, and secondly, to establish or join the evolutionary team, and then to do more tasks in the safe zone to be eligible for exchange.

Hearing this series of requests, Zhang Hexuan's face was a little ugly, and his inner struggle could be seen from his face, obviously they were still more resistant to the safety zone, mainly because they were not used to being controlled by others, but this evolution elixir was of great significance to the evolutionary, so Zhang Hexuan was in a dilemma for a while.

Chen Fei knew that the time was ripe, so he began to reveal his true purpose, looked at Zhang Hexuan and said with a smile:

"Brother, I happen to have a lot of evolution potions on me, some of them are from our team, and the other part is what I exchanged for my friends, if you need it, as long as you have evolution crystals, I can exchange them for you some, anyway, I can exchange them for the laboratory in the safe zone when I return to the safe zone."

Zhang Hexuan raised his head violently, Chen Fei at this time seemed to be a savior with dazzling golden light in his eyes, a pair of white angel wings behind him, a golden halo on his head, ignoring Chen Fei's overly attentive smiling face.

Zhang Hexuan stepped forward and grabbed Chen Fei's arm, and said gratefully:

"Don't worry, I'll give you a few more, as a fee for you to help us redeem!"

After speaking, Zhang Hexuan shouted loudly to the four eyes behind him:

"Four Eyes, take out all the crystals we collected from the mutant zombies!"

"Okay! Here it is! ”

After answering the four eyes, he ran back to the car and walked over with a small wooden box in his hand.

Chen Fei glanced at the small wooden box, with his keen perception, he could sense that there were a lot of evolution crystals in it, and his heart couldn't help but become excited, but on the surface, Chen Fei was still calm enough,

Chen Fei always maintained a calm smile on his face, and explained the exchange ratio of the safe zone to Zhang Hexuan that the current normal exchange ratio of the Xiaosang Mountain safe zone is six evolution crystals and one evolution potion, but it no longer limits the number of exchanges for each evolutionary team, and at the same time, the threshold has been lowered, and almost every evolutionary team can exchange it.

For the top five evolutionary squads, the safe zone is given certain privileges, and the exchange ratio only requires five evolution crystals to be exchanged for one.

The exchange ratio that Chen Fei and Zhang Hexuan said was five to one, and Zhang Hexuan showed enough trust in Chen Fei and agreed without hesitation.

When the small wooden box was opened to see the evolution crystals inside, Chen Fei subconsciously swallowed a large mouthful of saliva in his Adam's apple.

He roughly calculated, there were at least forty evolution crystals in this small wooden box, and there were several second-level evolution crystals among them!

Nima! It's sent! It's big!

Just looking at these evolutionary crystals, it's worth the trip!

Chen Fei cheered excitedly in his heart, eager to find Nangong Jin to share his joy now, but he still had to try his best to restrain the joy in his heart.

When he turned around and pretended to go to the car to get the evolution potion, Chen Fei took a deep breath to calm down his mood that was ten times more excited than Zhang Hexuan.

Chen Fei took the evolution elixir and began to count the number of evolution crystals with Zhang Hexuan and them, although he was prepared in his heart, the number after counting still made Chen Fei's heart beat uncontrollably.

There are a total of 36 first-level evolution crystals in the small wooden box, and there are seven second-level evolution crystals plus the one in Zhang Hexuan's hand, according to the exchange ratio of five first-level evolution crystals for an evolution elixir, and one second-level evolution crystal for an evolution elixir, these evolution crystals can be exchanged for a total of fourteen first-level evolution elixirs!

Chen Fei's heart blossomed, he simply didn't want to make too much money this time, but in the end, Zhang Hexuan only received thirteen evolution elixirs.

According to Zhang Hexuan, the one he wanted was regarded as the hard money for Chen Fei to help him redeem, which made Chen Fei have a great impression of Zhang Hexuan......