Upon hearing these words, Lu Yuan's heart trembled violently. He reached out and took out the fragment of the Earth Core Crystal from the bag, examined it in his palm, and suddenly felt that the crystal hanging on his chest seemed to be radiating light.
So Lu Yuan took out the dimensional crystal from his chest, compared the two, and found that they were the same crystals he had used when upgrading the land.
"Wait a minute! I'll be leaving for a bit!"
As soon as Lu Yuan finished speaking, he disappeared from the spot in the next second, leaving everyone in the room stunned, while Hei Zi's face showed a slightly calm expression.
"Yeah, you'll get used to it. He's gone to another dimension now. I don't know exactly how it happened, but he just disappeared out of thin air!"
After saying that, Kuroko picked up the dimensional crystal from the ground and put it in his palm.
"I reckon the only way to get in is through this crystal!"
Lu Yuan quickly arrived at the banyan tree with the Earth Core he was holding. At that moment, Xiao Shan was busy assigning classes and such to the other children. When she saw Lu Yuan arrive, a look of surprise appeared on her face.
"You...how did you get here?"
Lu Yuan glanced at the other person and smiled gently: "I had some things to do, so I had to come back!"
After saying that, Lu Yuan took out a candy box from the counter of Yuanfang Company from his pocket and placed it in the other person's hand.
"I brought some food from outside, it should be pretty good, you should try it!"
Xiao Shan took the candy box, her face slightly flushed.
So, Lu Yuan smiled slightly, took his dimensional crystal, went to the base of the big tree, dug a hole in the ground, and immediately threw the fragment into it.
This dimensional crystal containing energy is exactly the same as the previous one, but when Lu Yuan threw it in, there was no reaction around him. In the past, it would emit a bright white light the moment it was buried, and then the land would increase, but now there seemed to be no reaction at all.
"How strange, have these dimensional crystals really lost their function?"
Lu Yuan was puzzled, but he couldn't figure out why. He vaguely felt that his dimensional crystal had a very important connection with the Earth's core, but he couldn't figure out what that connection was.
At that very moment, Grandpa was squatting down and loosening the soil when a huge figure suddenly emerged from the woods in the distance. Before Grandpa could react, he was knocked to the ground by the giant beast.
Lu Yuan and Xiao Shan were so frightened that they quickly put down what they were holding and rushed over, only to find that it was Da Huang who had come.
After spending some time cuddling with his grandfather, Da Huang came over. Lu Yuan gently stroked Da Huang's head twice and noticed that the big guy didn't seem to have lost any weight recently. Although Lu Yuan hadn't given it any food or water, Da Huang was still able to live well, which puzzled Lu Yuan.
"Any new discoveries?"
Big Yellow immediately roared twice towards the distant mountains.
"Hmm? You mean there's been a new discovery on the mountain over there?"
Dahuang immediately nodded, then wagged its tail frantically, preparing to lead Lu Yuan toward the direction beside it in the distance.
"Alright, now that we've found it, let's go see if it really is a coal mine!"
Lu Yuan was overjoyed. He gently stroked Da Huang's head, and the next second he arrived at the distant mountain range.
After sniffing around, Dahuang immediately started running into the distance, with Lu Yuan following closely behind.
After running for about half an hour, Da Huang finally arrived at a place and roared desperately. Lu Yuan followed closely behind and found a pile of rubble.
"You mean the coal mine is right here?"
Big Yellow barked twice, meaning it was right here.
So Lu Yuan quickly climbed up the pile of rubble, and then there was a small rift valley in front of him. After passing through the rift valley, Lu Yuan followed Da Huang to a spacious valley area, and the scene in front of him immediately stunned Lu Yuan.
The entire valley was pitch black, with piles of shiny black coal scattered all over the ground.
Lu Yuan reached out and picked up a piece of coal. His hands were immediately covered with all sorts of black charcoal ash. He was very happy. He took out a lighter and burned the coal for a while. Sure enough, a wisp of black smoke slowly began to rise from the coal, followed by a bright red glow.
When the lighter finally went out due to the heat, the coal in his hand finally caught fire. Lu Yuan gently blew on it, and a strong smell of coal tar wafted out.
"It's coke! Not only can it burn, but it can also be coked! That's fantastic! It means this place has not only coal mines but also iron mines!"
Lu Yuan was overjoyed. He immediately crushed the coal into tiny pieces, then checked it several times to prevent it from catching fire. After confirming that everything was alright, he immediately ran towards the distance. In this vast valley, Lu Yuan indeed found a patch of red rocks.
The rocky terrain was extremely loose. Lu Yuan gently stepped on it and found that the rocks were incredibly loose. With a light step, he crushed the entire mountain. He picked it up and weighed it in his hand. Unlike ordinary rocks, this iron ore was heavier than ordinary stones.
Looking at the mountain range, Lu Yuan couldn't help but feel happy: "Great! It seems there are not only coal mines here, but also iron mines. I estimate that this mountain range is full of various mineral resources. I used to go through a lot of trouble to find them, but I didn't expect the resources to be right in front of me!"
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