Listening to Yu Chen's words, Zikong Bing and the others 'revealed' thoughtful expressions one by one, obviously not understanding Yu Chen's words. Zikong Bing was even more curious: "How do you know so much?"

"There is a golden house in the book, and there is a 'jade' in the book! When you have nothing to do, you will know everything if you read more books!" Yu Chen said with a smile, so far, Yu Chen can only push everything into the book, after all, no one can read all the books, not to mention all the books, the Purple Moon Heaven Continent is so vast, even the Imperial Library's collection is probably extremely limited. And the collection of books in the Imperial Library, even if a person starts reading them from birth, he probably can't read half of them when he dies!

"Master, those energy crystals are over there!" Shadow Xue Fei said to Yu Chen in the air, and Yu Chen glanced at it, only to see a row of huge sluice 'gates' faintly red 'color' on the bottom layer of the space.

"There is no rope, it seems that Yingxue has carried us down this time!" Chu 'Yu' glanced at the bottom and couldn't help but say, the ribbon floor surrounding the giant space is about a hundred floors, and the position of Yu Chen and the others is a little higher in the middle, and it is probably two hundred meters smaller from the ground of the giant space. At this time, without the rope, it is naturally impossible for them to go down alone, of course, they can also choose to go down, but according to the calculation of sixty times the circumference of 10,000 meters in diameter, if they want to go down, I am afraid that they will go out for a hundred miles, Yuchen They are not stupid.

Since Shadow Snow had been here for a while in advance, she was familiar with this space, and after a few circles in the air, Shadow Snow divided Yuchen and the other seven people into four batches and transported them to the ground. When Yu Chen opened the red 'color' gates, a wave of violent energy instantly surged out.

Behind the red 'gate', there are mountains of transparent crystals, and those crystals are exuding powerful energy that makes people's hearts palpitate.

"I'm afraid the energy contained in each crystal is comparable to the magic core of a seventh-order demonic beast, if it explodes in an instant, I'm afraid that even a ninth-order martial artist will be killed on the spot! But fortunately, although there is a lot of energy overflow, the structure of this crystal is very stable! It will not easily explode and other phenomena!" Yu Chen reached out and picked up an energy crystal and said slowly after feeling it.

"I'm afraid there must be hundreds of millions of crystals here!, and there are nearly a hundred red 'colored' gates here, so wouldn't the number of crystals here be ......" Zikong Bing opened his mouth, unable to continue talking. Because this countless energy crystals comparable to the seventh-order Demonic Beast Demon Core had already shocked her heart, not only her, but the rest of the people also 'revealed' a look of incomprehension. You must know that each energy crystal is comparable to a priceless high-grade Warcraft Beast Core!

"The energy in these crystals seems to be very peculiar! and it doesn't seem to exist!" Zhan Jiu said slowly while holding a palm-sized energy crystal.

"Perhaps...... That's why we all feel like we can absorb the energy inside!" Dong Xuan said. At this moment, a slight metal collision sound suddenly sounded in the real space, which made Yu Chen and the others slightly stunned, and then they all looked in one direction.

"There's also a giant 'door' there!" Lin Tianhua's heavy sword pointed not far away, it was a huge gate 'door' that was different from other gates, and the gate 'door' was just opposite when Yu Chen and the others came, due to the obstruction of the arc-shaped blade in the center of the space ground, Yu Chen and the others didn't notice its existence at first, and only then did they find that the giant 'door' was different.

"Little one, have you been to that giant 'door'?" Yu Chen asked first, Yu Chen always felt an indescribable strange feeling about this strange place.

"No, after finding this place with the help of the Heavenly Beast's energy energy sense, I have been cultivating here with these energy crystals, and after I get out of the juvenile stage and enter the growth stage, I will immediately go to find the master!" Shadow Snow's voice came into Yuchen's mind. Yu Chen's brows furrowed slightly, and he thought quickly in his heart.

Just by looking at the size of this huge building, it can be seen that this is supposed to be an underground complex similar to a military base, which may be a relic of a technological civilization in ancient times. It's just that...... Did the Purple Moon Heaven Continent really give birth to a technological civilization? If there were, there would definitely be a lot of similar things left, but why didn't the Purple Moon Heaven Continent have the slightest record of this kind of ruins?

Could it be an extraterrestrial civilization? Yu Chen suddenly thought in his heart, if this was the case, then what was the purpose of this extraterrestrial civilization building such a base in this Purple Moon Heaven Continent?

"Although I don't know what this place is, I don't feel like this place is as simple as it seems in front of us!" Yu Chen walked to the huge gate and said solemnly, followed by Chu 'Yu' behind him, "Does this place look simple? Why don't I think it?"

"Hehe, who made you stupid?" Yu Chen smiled, reached out and pulled the handle off the side of the giants, and with a rumbling sound, the huge gate slowly opened.

"I didn't expect you to even know this kind of mechanical technique! I knew that I would also read more mechanical classics in the pavilion!" Yu Xun'er couldn't help but say, the mechanical books in her mouth were the records of the Purple Moon Heavenly Continent on the use of machinery, and it was obvious that she regarded the achievements of scientific and technological civilization in front of her as some mechanical machinery. Yu Chen smiled, and naturally he wouldn't explain.

The gate 'door' opened, and what appeared in front of everyone's eyes was a huge horizontal passage, Yuchen slowly walked out of the big 'gate', only to see a wide and abnormal passage across the eyes, and there was a feeling of not being able to see the end as far as the eye could see.

"Shadow Snow, check if there is any danger!" Yu Chen gave an order to Shadow Snow, this place is too big, it is really not easy for the rest of the people to do it outside of Shadow Snow, besides, only Shadow Snow has the strength to deal with all crises.

Shadow Snow let out a soft roar and flew towards the end of the passage, turning back in a short time, and 'excitedly' reported the discovery to Yuchen. Yu Chen listened to what Ying Xue said, and the corners of his mouth gradually 'revealed' a smile.

"This huge space behind us, the little one is in this passage!" Yu Chen said.

"There are still two?" Hearing Yu Chen's words, Lin Tianhua couldn't help but shout, if there were two more, wouldn't that mean that there were hundreds of huge rooms that contained energy crystals?

"Let's go! I think I already know where we're going, and there's a gate in the middle of the passage that leads to the center of the complex, if I'm not mistaken!"

......

To be continued! Writing and writing, the right 'chest' hurts for a while, I'm dripping my God, I'm out of breath! It's not okay to pant and breathe! Which fairy brother am I provoking!