"Cough, cough."

Yun Yi had no time to react and choked a few times.

The basic original energy technology cells were useless to breathe. They jumped out of the water and looked ahead. They saw a huge underground space, beside the lake, a city made of huge rocks jumped into their eyes. Houses were lined up one after another, and straight stone avenues were interspersed. In the middle of the city, a stone tower up to 100 meters high stood steadily. The spire seemed to pierce the rocks that blocked it, emitting a dark blue light, bringing a trace of light to the entire dark underground space.

The embarrassed Yun Yi activates his original energy, evaporates the moisture from his clothes, and flies quickly towards the dungeon.

Walking onto the stone street, thick dust swarmed up. When I pushed open a door made of metal, the whole door was still shining and should be made of a certain alloy.

"Zero, can you find out how much history this city has?"

The door opened with a sound, and Yun Yi, who was entering the door, asked with his thoughts.

"This city is about 3 million years old."

Scan the room and the neat houses were still there as time passed, and anything in the room had turned into ashes, with only the faint marks left on the ground.

"How is that possible? Did the Earthlings have this kind of metal smelting technology 3 million years ago? It's still the same as the stainless steel that just left the factory." Yun Yi exclaimed.

"Maybe the myths and legends on the earth are not groundless, maybe they are some civilization with highly developed technology."

Yun Yi searched several houses in succession, but found nothing valuable, except dust.

The disappointed Yun Yi walked towards the center of the city, hoping to find clues in it.

In the center of the city, in the huge square, there is a white jade statue with a height of about 9 meters. She is wearing armor and has a handsome and majestic appearance. She holds a long sword and a pistol-like weapon on her waist. Her appearance is no different from that of modern Han people. Behind him, a pyramid of half a statue height stands quietly.

"Zero, do you have no impression? Look at this pyramid statue, exactly the same as what I saw when I got you, the energy balls on the top have been carved out." Yun Yi, who was observing the statue in circles, asked.

"Sorry, I can't help you."

As the dust on the base of the statue was slapped, three palm-sized hieroglyphs gradually revealed.

"Do you know these words?" Yun Yi continued to ask.

"Immortal King, Jade."

"Why do you know these words, but there is no relevant record? I absolutely believe that you are related to this place. "Yu" is the name of this statue, right?"

Yun Yi's face was full of questions.

After careful searching, Yun Yi turned around and walked towards the huge stone tower directly behind the statue.

There are three bases under the tower, each with thirty-three steps. The base and tower body are made of unknown gray-blue stones, emitting a light blue light.

"Blue light stone has a hardness comparable to diamond, and the earth is now extinct." Zero suddenly introduced to Yun Yi.

"I hope you have some records of what's going on here."

Entering the open doorway, we came to a huge hall, where rows of curved stone chairs were placed in the entire hall square, and white jade seats were placed on the high platform in front, and the rest were empty.

"I think you should look at the murals around you, and the information you want should be on it." Zero suddenly reminded.

Yun Yi turned around and walked to the left, and murals followed one by one surrounded the entire tower.

The first pair is painted with primitive people holding simple tools and hunting a kind of cattle-like animal. A small tribe is emitting smoke from cooking fires, and there are several rows of text engraved under the mural.

"In 500 years BC, the ancestors of the immortal clan lived a primitive and arduous life." Zero provided Yun Yi with instant translation.

The second painting shows the birth of a baby boy in the tribe.

"In the first year of Xianli, the Immortal King Yu was born in the Yan tribe."

The third painting is painted with the Immortal King Jade and got a pyramid.

"In the 18th year of the Immortal Li calendar, the Immortal King Jade was obtained as a inherited artifact."

The fourth painting records that the immortal king Yu leads the tribe, improves tools and develops civilization.

The fifth picture records that the Immortal King Yu is attacking nearby tribes and establishing a country.

Then a mural represents the immortal civilization of an era. From the Stone Age to the Bronze Age, to the Atomic Age of the Sixteenth mural, the immortal civilization ruled the entire Eurasian continent with a population of more than 2 billion.

Until the seventeenth mural, it was painted that the immortal civilization was fighting a world war with another civilization. Tanks, fighter planes, missiles, and warships were all attacking wildly. The text translated: "In 3858, a demon suddenly appeared on the continent deep in the ocean, crazily slaughtering the people of the Immortal Dynasty. The immortal king Yu was forced to face the challenge, and the two sides fought a war that affected the entire world."

Eighteen murals: "In the 4,000th year of the Immortal Calendar, the war between the Immortal Civilization and the Demon has lasted for more than a hundred years. The population of the Immortal Civilization is developing slowly, and civilization has entered the digital age."

Until the nineteen murals, the paintings were full of explosions, destroying cities, and crowds and robots holding weapons were destroyed in the explosion.

Zero translated slightly heavierly: "Immortal Calendar 4920, the immortal civilization entered the gene era, and the demon launched a destruction attack, firing nuclear bombs frantically. The immortal king Yu was forced to counterattack, and the nuclear explosion destroyed everything."

Yun Yi walked to the last mural in silence, and looked at the immortal king Yu in the painting, fully armed and ready to set off. Behind him was the entire ruins of the city.

"In the 4921st year of the Immortal Calendar, I, the Immortal King Yu, will embark on the journey in person. Either survive or destroy. The people and the city have been destroyed. I will challenge the Demon King today. If a later generation obtains the inherited artifact, you must be careful of the appearance of the Demon. They do not know when and where they will appear beside us, and they are destined to be our old enemies for life."

Yun Yi, who looked at the murals and listened to Zero's translation, was silent for a long time.

"Zero, is this my old enemy? Where do they come from and where will they appear?"

"Sorry, I don't know." Zero's voice looked a little deeper.

"Then let us prepare early and work hard to develop. I believe that no matter what enemy we face, no one can defeat the confidence of the Han people for billions of years."

Yun Yi looked at the firm body of Xian Wang Yu and said incredibly firm. From childhood to adulthood, Yun Yi's dictionary did not have the words "fear" and "confession" in his dictionary, and he would never have it in the future. He was confident that he could come out of the Siberian training camp and eliminated all the steps he encountered on the road, no matter what means he took.

"Zero, do you think there are other inheritors?"

"This possibility is not ruled out. Maybe I may be reset after every inheritor fails."

"Look for it after you go back, hoping to get more clues and at least understand where our enemies come from."
Chapter completed!