The hottest news in the safe zone right now is about the crystal cores in the zombies' heads.

Just yesterday afternoon, the safety zone issued a temporary notice to use supplies to purchase this kind of crystal core. No matter who you are, you can use the crystal core to exchange for food, and you can take as many as you can.

Ten crystal cores the size of a little fingernail can be exchanged for a pound of rice.

To Ruan Ning, who knew the truth, this exchange rate was already very low.

But for others, this was a blessing from heaven. No one could have imagined that this normally unnoticed thing could be exchanged for so much food.

Nowadays, the safe zone only provides one free meal a day, which is not enough to fill the stomach. Now there is a good opportunity to earn food, who can not be tempted.

Such high returns can even make some ordinary people willing to risk their lives and leave the safe zone to dig for the so-called crystal core.

Of course, there were smart people who noticed something was wrong. They did not choose to sell the crystal cores to the safe zone, but kept them for themselves.

However, such people are still a minority after all. When the end of the world comes, the most important thing is to survive. The hunger in front of them makes it difficult for them to consider the future.

Safe zone entrance.

Ruan Ning and his group had just arrived here, waiting for the guards at the door to let them in.

All the way from the safe zone, the word they heard the survivors say most often was crystal core. There were also many people standing at the door who wanted to go out to get crystal cores or were hesitating whether to go out.

"I heard that the things in the zombie's head can really be exchanged for food? Could it be that someone is playing a prank on us?" someone said in disbelief.

"Brother, this is a notice issued by the safe zone, how can it be false? I saw someone exchange a week's worth of food from the window early this morning." The person standing next to him explained.

"Is there really such a good thing?" The person who asked the question just now still had some hesitation on his face, but he seemed to be tempted, and his eyes showed a desire to try.

Another person came over and said, "Wake up, it's not that easy to exchange crystal cores for food now."

"What's going on? Didn't you say you can exchange as many as you have?"

"That's what I said. From yesterday afternoon to this morning, all the zombies near the safe zone were looted. There was not a single zombie with a crystal core. If you're here to pick up some, forget it. Of course, if you're here to kill zombies, then just ignore what I said... Alas, it's a pity that I was a step too slow. I should have picked up more of these things when I was outside the safe zone."

Some were happy and some were worried. After figuring out what the crystal core was, many people regretted why they didn't dig out the zombie's brain to take a look.

…

Compared to others, Ruan Ning and his group looked much calmer, because they knew about this earlier than these people, and even knew what the function of the crystal core was and why the safe zone spent so much supplies to purchase it.

What Gu Yicheng stayed behind to talk to Xue Chen about that day was about crystal cores, and he casually threw the bag of crystal cores that Ruan Ning refused to accept to him.

Xue Chen trusted Gu Yicheng very much, and tried it out that night according to his instructions. It really worked, and the effect was remarkable. Then he asked Xie Fei, a fire-type psychic in the team, to use the crystal core to improve his psychic power.

Naturally, Ruan Ning was not left behind by Xue Chen.

So when she took the half bag of crystal cores from Xue Chen, she was still a little confused. She didn't expect that these crystal cores went around in circles and finally returned to her hands.

At first, the hero gave her so many crystal cores alone, and Ruan Ning refused because she felt guilty and was afraid that the hero had ulterior motives. But now that the other two psychics in the team have accepted the crystal cores, the problem she was worried about no longer exists, and Ruan Ning has no reason to refuse.

Now, when Ruan Ning heard people around him discussing the crystal core, he suddenly thought of this matter and couldn't help but turn his head to look at the male protagonist beside him.

The day for their departure had been set, today.

However, before setting off for City B, they still had to go to one place.

They basically had all the supplies ready, except for one thing: gasoline.

It was so far to get to the capital, it was not realistic to just walk there, so it was best to drive if possible, but driving required gasoline. Gasoline was difficult to change in the safe zone, and it could even be said that it was completely impossible to change, and they had to drive such a long distance, so they had to rely on themselves for oil.

If there's no space, they'll try to collect gas on the way, but now they want to go big -

Xue Chen got a piece of news from someone he knew well. There was a gas station five kilometers outside the safe zone. On the afternoon before the apocalypse, a tanker truck happened to be parked there.

And there's a good chance that tanker is still there right now.

That's right, they wanted Ruan Ning to take as much gasoline as he could from the tanker truck.

Ruan Ning actually wanted to say that she could take away the entire tanker truck, and even adding a few more would be no problem at all.

"Ningning, come and ride with us."

After leaving the safe zone, Ruan Ning walked to the team's car unconsciously. Just as she was about to get in, she heard the male protagonist ask her to come over.

The male protagonist's off-road vehicle has been modified. It looks ordinary from the outside, but it is actually more sturdy and durable than Xue Chen's car, and can also hold more supplies.

Xue Chen certainly had no objection to the two siblings sitting in the same car. Moreover, Ruan Ning was carrying most of the team's supplies by himself, so he was the focus of protection. Of course, he would stay where it was safer.

So he readily let Ruan Ning sit over there and helped her put her backpack into the car over there.

Ruan Ning, who had been arranged clearly, said: "..."

The car slowly drove out of the safety zone. Ruan Ning turned around and took a last look at the safety zone behind him.

I have been here for a while and now I am leaving suddenly. I feel a little reluctant.

After all, it was impossible for any of them to come back again.