"You most ancient gods in the cultivation realm, you have to retreat when you see our spaceship!" Xue Yi said with a proud face.

"But you became my captive. Zhao Yuan looked at Xue Yi's flawless face and said with bad intentions.

"I'm just a master of the top ten in front of the Awakened Human Race, in the entire Awakening Human Race, I am an insignificant existence, if you meet our mechanical warriors, I'm afraid it will be ......" Xue Yi faced Zhao Yuan's naked gaze, unaware, during this time, she had become accustomed to Zhao Yuan's nonsense at some times, and she also knew that Zhao Yuan usually just talked with his mouth, but not with his hands.

"Mechanical Warrior?" Hearing this name, Zhao Yuan had an inexplicable feeling of extreme danger.

"Yes, mechanical warriors, we awaken the legendary warriors of humanity!"

"Hehe, the legendary warrior, since it is the legendary warrior, then you must not have seen it. ”

"Zhao Yuan, if you encounter a mechanical warrior, the best way is to flee as soon as possible, don't leave anything to chance!" Xue Yi looked at Zhao Yuan with a serious face.

"Is it really that powerful?" Zhao Yuan was stunned.

"Zhao Yuan, the last time you mentioned that there was a cultivator on the earth who had Hou Yi Shooting Sun, I suspect that he is not a cultivator, but a mechanical warrior. ”

"Hou Yi is a mechanical warrior......" Zhao Yuan suddenly couldn't close his mouth.

"I'm not completely sure, but judging from the weapons he used, he was a mechanical warrior in the early days of our awakening humans, and in the allusions of our awakening humans, there are some biographies of mechanical warriors that are very similar to Hou Yi Shooting Sun. ”

"Perhaps...... Could it be that Pangu opened the sky and Nuwa made up the sky, all of them were mechanical warriors. ”

"Hehe, you think too much, most of them are gods, but occasionally there are a few mechanical warriors, which will make ancient humans mistakenly think that they are also gods. Xue Yi smiled.

"I see...... Wait, you're saying that as early as tens of thousands of years ago, awakened humans began to operate on Earth?"

"Yes. According to the historical records of our awakened human beings, tens of thousands of years ago, the footprints of the early awakened human beings set foot on many star fields, and the Milky Way has a very clear record. ”

"No wonder, no wonder ......," Zhao Yuan muttered to himself.

"What's wrong?"

"In some prehistoric civilizations on Earth, many murals show that there are flying machines and aliens wearing spacesuits landing on Earth, and it seems that it is very likely that your awakened humans have really reached Earth. ”

"Well, that's a big possibility. Of course, it is not excluded that other human civilizations have reached the earth. ”

"Okay, okay, fuck it, I'm going to dig a tunnel, and if we can't find our way home tonight, we'll forget about it." Zhao Yuan took Xue Yi in his arms and pinched her face with both hands.

"Didn't you say you wanted me to do it?" Xue Yi's neck was red, and her voice was so small that she couldn't hear it.

"Yes, because, I feel it now, and you're very willing. ”

"Ah......h

Xue Yi was too ashamed to look at Zhao Yuan's eyes.

"Okay, I'll go. ”

When Xue Yi looked up, Zhao Yuan had disappeared out of thin air, and the air was still filled with Zhao Yuan's strong masculine smell, no, it was the smell of sweat.

Half an hour later, Zhao Yuan appeared in front of Xue Yi sweating profusely.

"Your suspicions have been ruthlessly confirmed. Zhao Yuan smiled bitterly.

"Is it really a metal crust?"

"Yes, I dug three places in a row, and after digging the same distance in all three places, they were all metal crusts, and it seemed that the only way to open the metal crust was to use violence. Zhao Yuan sighed.

"Then dig it. ”

"Will it damage the structure inside?" Zhao Yuan was a little worried.

"If the interior of this planet is hollowed out, then there should be a huge underground city underneath, and digging a hole shouldn't make any difference, unless you happen to dig into the core of the main control room. ”

"I wouldn't be that unlucky. Xue Yi, guess what, are there still people living in it?" Zhao Yuan asked.

"Nope. ”

"Why are you so sure?" Zhao Yuan was stunned.

"Hollowing out a planet, obviously, this is a defensive posture, then that is to say, the human beings here have experienced an external invasion, if they survived the enemy's invasion, they will not live underground for a long time, and from the current situation, there is no trace of human activity on the ground, then it is enough to show that they have all been killed. ”

"All the people on a planet have been killed?" Zhao Yuan's heart was inexplicably heavy.

"The biggest difference between ordinary humans who have not broken through the space barrier and cultivators is that once they encounter an attack from outer space, there is no third choice except surrender or death. It is precisely for this reason that the early awakened human beings traveled to various planets inhabited by humans, spreading the fire of scientific and technological civilization, so that they gradually had the ability to break through the barriers of space. Xue Yi's face was gloomy.

"Maybe there will be a miracle. Zhao Yuan laughed dryly.

"Hopefully. ”

Xue Yi nodded, however, she seemed to know too much about this kind of tragedy, and there was no expression on her face that expected a miracle.

Zhao Yuan didn't say any more, returned to the hole that had begun to be excavated, jumped in, and began to dig.

Compared with the beginning of the excavation, the efficiency of digging metal is much lower, even if Zhao Yuan is already a half-immortal body, in the face of high-tech smelting alloys, it has to pay extremely large energy, fortunately, the number of spars on Zhao Yuan's body is countless, he only needs to refine the spars, and use the energy of the spars to excavate.

If you just rely on the raw strength of the human body, and use the strong horizontal force of Zhao Yuan's cultivation of "Ten Thousand Enemies", it will not be an overnight thing to dig through the alloy crust.

It took two hours for Zhao Yuan to dig through the metal crust that was dozens of zhang thick, if it wasn't for his personal experience, he really didn't dare to imagine how much manpower and material resources it would take to build this huge underground project.

"Click!", the silver-white metal shell was finally dug through a hole, and a warm light drove away the darkness in the tunnel.

Zhao Yuan held his breath and did not make the slightest sound.

Although Xue Yi said that there would be no one in the underground city, Zhao Yuan still held on to the last glimmer of hope.

In order to avoid disturbing the residents below, Zhao Yuan's last excavation project can be described as careful, the scorching immortal fire melted the metal shell, slowly, slowly, the metal shell melted into a round hole with a diameter of one meter.

Through the round hole, Zhao Yuan peeked into a huge underground realm.

It's a suffocatingly quiet subterranean realm.

At the same time, this is also an underground world full of life.

Bright lights.

Green trees.

No.

This huge space, without a single pedestrian, spacious and bright streets, empty, and the atmosphere is particularly eerie.

This is supposed to be a city of steel, but it's not all steel, and in many places, you can't even see metal.

The vigorous vitality and the eerie atmosphere exist in a huge underground space at the same time, without the slightest sense of disobedience.

Zhao Yuan also took Xue Yi underground.

As Xue Yi, an awakened human being who has seen a lot of the big world, when she saw this huge underground world, she couldn't help but be amazed.

At this time, Zhao Yuan inexplicably thought of those ancient buildings on the earth.

Compared to this huge underground ruin, the pyramid hanging garden and the like are not worth mentioning at all.

What shocked Zhao Yuan the most was that this huge underground city seemed to be still functioning normally, with the artificial sunlight on the top and the lighting system of the street, the automatic sprinkler system on the ground, and even, on the street, every once in a while, there would be some vehicles that looked very sci-fi and stopped and drove away, but there was not a single passenger on it.

You can imagine how prosperous this underground city was at the beginning.

"What level of science and technology can be reached here?" With Zhao Yuan's scientific illiterateness, he can feel that the science and technology here are not known how many streets the earth has been thrown.

"Level two. Xue Yi kept observing the surrounding infrastructure.

"This is only the second level?" Zhao Yuan looked dumbfounded.

"Yes, level two, not enough level three. Xue Yi nodded and replied to Zhao Yuan very affirmatively.

"I really want to go to the place where you eighth-level civilized humans live. Zhao Yuan smiled bitterly.

"You can't see it. Xue Yi said lightly.

"For what?"

"No cultivator will be able to enter the dwelling place of the awakened humans. ”

"Never?"

"This ......" Xue Yi seemed to have a slight loosening on her face.

"Has a cultivator ever been there?" Zhao Yuan immediately noticed the expression on Xue Yi's face.