Under the guidance of Fang Xiaoyu, the expedition team slowly went deep into the primeval mountain forest, in these completely undeveloped areas, it is not suitable for human survival, the more they go into it, the more harsh the environment becomes, but the expedition team members are all experienced veterans, and there are El and Elena, two elves born for the mountains and forests, his actions are still very safe.

Half a month, half of the supplies on their bodies were consumed, and all the team members were exhausted, after all, every day they repeated the action of climbing and descending the mountain, and they had to walk through the dense forests of trees, and they were always vigilant against possible beasts or poisonous snakes, which was very physical and mental consumption to people.

"Here it is, it should be here." Fang Xiaoyu stopped beside a huge cave. "The height of this cave is 30 meters, the entrance of the cave extends far to the bottom of the cave at 50 degrees, there is no end in sight, the wall of the cave is unusually smooth, but there is no trace of artificial excavation, fortunately, there is a ledge protruding more than ten meters above the entrance of the cave, so that the rain does not pour into the hole, otherwise no matter how deep the hole is, it will definitely be filled after so many years.

"Where is this? Shall we go in? Elena asked worriedly as she looked at the dark hole.

Fang Xiaoyu nodded: "Of course you have to go in, that signal is several kilometers away from the ground, if we only walk on the ground, we can't get there, and here is a shortcut to that signal." ”

Browning Hammer approached and looked at it, "I don't know how deep this hole is, I'm afraid we won't have enough flashlights to bring with us." ”

Fang Xiaoyu said: "I said, that signal source is several kilometers deep underground, let's go in diagonally, why don't we have to walk more than ten kilometers." But don't worry, I'm prepared. "Fang Xiaoyu can let Xiao Feng directly make flashlights and even various other materials in the equipment warehouse, at the beginning, it was just to not attract attention, so that everyone could bring equipment, if it was urgent, he could complete the expenses that could support an army, it was too easy for this small expedition of dozens of people.

Al nodded, "Alright then, I'll bundle some torches for lighting and see if there's enough oxygen in there." ”

The expedition members quickly tied a large number of torches with pine branches and carried them on their backs, anyway, there were many fewer supplies, and these torches would not feel too heavy. A group of dozens of people entered the cave with more than a dozen torches, Qiu Rui was afraid that Fang Xiaoyu would be in danger, so he rushed to the front with Qiu Yifeng, while the goblin Subaru, the dwarf patriarch Ruger Giant Hammer and several guards also walked to the front, carefully exploring the way forward for the team.

The cave was very dry and did not have any peculiar smell, which was good news for the expedition team, indicating that there was no gas in the cave and no wild beasts used it as a dwelling. The abundance of oxygen in the cave made everyone not feel depressed at all, and what made the team members even happier was that there was no fork in the road at all in this cave, and they didn't need to explore the road, they just had to keep moving forward.

Everyone moved forward at a not-so-fast pace for an hour, estimated to be more than five kilometers, the torches had been changed twice, but there was still no end in sight, but the oxygen was still very abundant, and everyone did not have to worry about suffocating to death.

"Young master, there is a bright light ahead." Al, who had the best visual power, suddenly said that his visual power, which was twenty times more than that of a human, was equally useful in such a straight passage.

"There's a light? Have we found our goal? Fang Xiaoyu said excitedly.

Al shook his head: "I can't see clearly, it's just a blue patch, I don't know what it is." ”

"Blue-watery? It can't be the sea. Anglo scratched his head and wondered: "It's not right, if it's the sea, in such a deep underground, it should be black without sunlight, how can it glow." ”

"Maybe there's some danger, let's be careful." Jury said as he clattered his lever rifle into his chamber and acted on guard. Jory has been reluctant to change to a new weapon for decades, and he has a strong affection for this weapon, and he firmly believes that if something happens, he can use this old weapon from decades ago to shoot the same rate of fire as an automatic rifle.

Everyone moved forward at a slower pace, cautiously and vigilantly, and walked for more than forty minutes, and the others gradually saw the blue patch, but those blue colors seemed to be flowing, not stagnant for a while, but there was no sound at all, so that an experienced veteran explorer like Jury did not have the slightest clue.

"Don't be nervous, there shouldn't be any danger, everyone keep going." Fang Xiaoyu beckoned the team members to move on.

After walking for a short time, the distance was getting closer and closer, and then everyone saw that the blue things were not blocked in the hole, but the color of the cave wall. Those blue crystals are like brilliant crystals, but they are full of flowing lines, giving people a sense of relaxation.

"It's so beautiful, what is this?" Elena touched the stone wall with her hand, feeling the coolness coming from the blue stone wall, and couldn't help but admire.

"Xiaofeng, what's that?" Fang Xiaoyu's heart didn't have a bottom, he asked Xiaofeng as soon as possible.

Unexpectedly, this time Xiao Feng didn't answer him for the first time, and it wasn't until a long time later that Xiao Feng woke up like a dream and said excitedly: "It's a coltan energy stone, master." With so many power stones and such a high purity, we have developed this time, and I can definitely rise to level ten. Xiaofeng was already excited, and he didn't know what to say.

"Really? Columbia, the kind of thing that makes the entire Earth Federation crazy, is so beautiful. Fang Xiaoyu couldn't help but stretch out his hand towards the energy stone wall.

"Master, you can't touch it. If you touch it, I will automatically absorb the power stones, and if the cave collapses, everyone will not be able to escape. Xiaofeng immediately spoke to stop him.

Fang Xiaoyu's hand stopped in the air, and he secretly said in his heart that it was dangerous, if he touched the stone wall, maybe the cave would have collapsed. "Let's move on." Fang Xiaoyu pulled everyone's thoughts back. The expedition members didn't know the preciousness of these blue stones, and they still had their own goals at the moment, so no one looked at the blue walls anymore, and they continued to move on.

Walking in the blue cave, it is as if you are under the sea, and everyone feels relaxed, as if the fatigue of the body has disappeared, and even the steps are much lighter.

"Xiaofeng, why do you want to put my feet on the ore, you won't absorb it?" Fang Xiaoyu asked in his mind as he walked.

"Only your hands will absorb it automatically, otherwise I would have made you touch the ground with your hands when I was in the Blue Moon." Xiaofeng explained.

"Can you find the source now, and how far are we from each other?" Fang Xiaoyu continued to chat with Xiaofeng.

After a slight pause, Xiao Feng said: "After entering the ore vein, the signal is getting stronger and stronger, according to my detection, the signal source is three or four kilometers ahead, directly in front of this hole. ”

The expedition continued and soon made a real discovery, and in front of them appeared a wall consisting of three rows of a total of twenty-four circular pipes, blocking the entire cave.

"This is the ship's thrusters, a lot." Anglo, who had seen the spaceship in the Southern Subcontinent, exclaimed.

Al observed for a moment and said, "No wonder this cave is so regular, the cave walls are also very smooth, it seems that this cave was completely smashed out of the ground after the ship fell." ”

"It's so powerful, it's so hard." Fang Xiaoyu let out a burst of admiration.

"But how do we get in?" Elena looked at it for a long time, and the hull and the cave were so tightly combined that it was impossible to get around.

After turning around the neighborhood a few times, Fang Xiaoyu said, "Let's go in through the nozzle of the thruster." ”

"Young Master, let's go in from here, you can wait outside." Afraid of any danger in the vent, Qiu Rui didn't dare to let Fang Xiaoyu take the risk.

Fang Xiaoyu shook his head and said, "It doesn't matter, this thruster looks like it hasn't been used for a long time, let's go in together, not to mention that without me, you can't get in." After speaking, Fang Xiaoyu was the first to drill into a vent.

Seeing Fang Xiaoyu enter, the others hurriedly followed suit. "Xiaofeng, find a suitable place so that we can get out." Fang Xiaoyu instructed Xiao Feng, this kind of engine is fully enclosed, if you can't find a weak link and break through the wall, it will also be a dead end here.

This engine vent was obviously huge, and they walked a full dozen meters inside, and they did not reach the end. Fang Xiaoyu, who was walking in the front, suddenly stopped, "Let's make an opening here." Fang Xiaoyu suddenly pointed to a section of the wall and said.

"Shall we make a hole and get out?" Browning Hammer was surprised to see the flat metal surface.

"Of course, do you think the engine vent is out of the way? Or do you want to go to the fuel tank. Fang Xiaoyu asked rhetorically.

"Young master, the spaceship obtained from the Southern Subcontinent has been studied, the outer wall of the engine vent is thirty centimeters thick, this engine is even bigger, this outer wall must be very thick, we don't have tools, how to dig it." Said the Browning Hammer, who had participated in the study of the spaceship on the planet.

"Maybe there's explosives to try." Jury touched his chin and said.

"It can't be blasted, how much explosives do you need to blast through such a thick metal wall, and what if the charge is too large and the entire spaceship is damaged?" Elena hurriedly stopped, she knew that this was a scientific research spaceship, for fear of destroying something useful.

Fang Xiaoyu said with a smile: "I'll solve this problem." After speaking, Fang Xiaoyu took out dozens of gas masks from Xiaofeng's equipment library and distributed them to everyone.