Returning to the rolling shutter door of the No. 1 passage, Li Yiyi was too lazy to probe one by one, so he scattered his divine sense and quickly checked around the other three passages.

After this circle, Li Yiyi knew clearly what was in the three passages, and the No. 2 passage was also a dormitory area, but the rooms there were all two-person or four-person rooms, which seemed to be the residence of ordinary employees, and the kitchen and other equipment were the same as the No. 1 kitchen.

Inside Passage 3 was the office area, but after searching, she did not find any information related to the institute, and the laptops and desktop computers in the office that had made her blush before the end of the world but were reluctant to buy were readily accepted.

"I don't know if these things exist in the spirit world, if not, maybe you can make a fortune."

Walking to the No. 4 passage, Li Yiyi's eyes narrowed, and then he smiled weirdly, although they were all eliminated goods hundreds of years ago, but the number was too much, even if it was sold in tatters, it should be worth some money, so Li Mou comfortably collected the guns, explosives, rocket launchers, bulletproof suits, diving suits, etc. in the No. 4 passage into the ring.

Li Yiyi crossed his hands on his hips with satisfaction, and then continued to move towards the ground with the spirit of 'Look, this is the country I have laid for you'.

Walked about 500 meters, here began to go down again is like an abyss-like darkness, along the way Li Yiyi found eighteen passages one after another, the harvest is not a lot, but these are like ordinary treasure chests in the game, although they will be very happy to encounter, but there is no sense of accomplishment of getting the golden treasure chest after killing the boss.

Li Yiyi released her divine sense to explore the surroundings one by one, but did not find the power distribution room, so she could only take out the moon stone again to illuminate her.

Continuing to walk down the distorted staircase, Li Yiyi could no longer hear the loud noise from the vents above, and the deeper underground world began to become extremely quiet, and the quiet Li Yiyi unconsciously slowed down his breathing.

On this road, in the huge and spacious underground building, there was no cross passage hanging in the center, Li Yiyi clenched the black long stick in his hand and was on guard at any time, and his pace became slower and slower, and even the footsteps were as light as possible.

Although the moon stone was illuminated so that she could see the things around her, in the darkness deeper underground, even the moon stone could not illuminate, she sensed that there was something there, and there was some danger.

It shouldn't be far off, she didn't dare to release her divine sense, because she didn't know how far the things below had evolved now, and if any of them were sensitive to spiritual perception, it would be a problem for her.

When she was fighting the Super Octopus that day, she didn't notice that the octopus had eyes on its head, so she briefly speculated that either these things had been in the dark underground for too long and their vision had completely degraded to nothing, or that the people who studied them didn't need them to have eyes, which was why she was relieved to use moonstone for lighting.

"Smack."

Li Yiyi stopped one by one, his ears moved like a conditioned reflex, and the sound of water was not far below.

Li Yiyi's heart tightened, and then he hid himself and all the breath around him in the dark, this time Li Yiyi didn't need to walk, but his footsteps hung 20 centimeters up the stairs, and began to float down like a ghost hidden in the darkness.

"Bang...... Smack. ”

The more it floated downward, the clearer the sound of the water that had seemed to be absent became, and even the speed of the drop changed.

After another thirty minutes of floating down, Li Yiyi finally landed at the bottom of the entire underground building, until now, Li Yiyi still did not see any creatures, but what surprised her even more was that there was a huge cave in the depths of the ground, which was thousands of meters deep.

In front of the entrance of the cave, Li Yiyi saw an ultra-modern technological device that can only be seen in science fiction movies or science fiction.

Li Yiyi took a few steps back, allowing his eyes to see the device more completely.

In front of the cave, there is a huge metal ring device, this ring is almost the same size as the cave entrance, and the entire huge metal ring is very smooth in appearance, and the appearance is somewhat similar to the bladeless electric fan before the end of the world.

At the four corners of the ring are four metal brackets, all of which are fixed to the stone wall at the mouth of the cave, and between each bracket are hundreds of large black cables, all of which converge on a huge instrument nearly sixty meters high.

The shape of the whole instrument is like a huge old-fashioned radio, and there is a black mesh cloth on it that resembles a sound package, but the lower part of the machine, which should be the position of the operating station, has an ultra-modern feeling that is different from the shape above.

Li Yiyi walked to the console, not daring to touch a button, God knows if this thing that seems to be the ultimate killer will explode itself and blow itself into scum, but when Li Yiyi carefully checked the machine, the black ball on her arm suddenly flew out of her arm.

Li Yiyi reflexively looked at his arm first, and after making sure that there was no imaginary pit on his arm, he looked at the black ball with peace of mind.

The black ball didn't fly fast, and even trembled a little in the air, and Li Yiyi was afraid that it would fall halfway.

However, the black ball was strong, and it persisted in flying into a metal groove on the machine's console that matched its shape.

"Well, what's going to happen after that, if you're going to blow yourself up, please give me a few minutes, okay?"

Just when Li Yiyi made up a bunch of bad things in his mind, with that black ball as a starting point, the various light bulbs on the entire ultra-modern scientific and technological instruments began to light up layer by layer from bottom to top.

"Is the level of science and technology in my Great Celestial Empire so awesome before the end of the world?"

As soon as Li Yiyi saw that purple light bars began to light up on the dense black cables on the instrument, she hurriedly flew upward, and she always had a premonition that something bad would definitely happen next.

But when Li Yiyi flew less than fifty meters, she felt as if her body had hit a wall, and then she bounced back into the ground like a weak woman who was powerless.

But fortunately, her mana did not disappear, and she quickly resuspended in the air after reacting, as for why she was bounced back just now, I am afraid that it is the wall that cannot be seen, and the level is higher than herself......

Li Yiyi looked down and found that the brackets that fixed the four rings were also lit up, and seeing that the purple light bar was about to approach the ring, Li Yiyi didn't think about it, and almost subconsciously drilled into the small spirit realm!