Li Zhibao's body was shocked, showing an expression of sudden realization, and said: "I see, thousands of years ago, a meteor fell to the ground, bringing unimaginable disasters, and the people of the Yu Dynasty were forced to go to the depths of the earth, maybe this is the reason why there are ancient city ruins of the Yu Dynasty underground." ”

Xiao Ling said: "So it is because there were meteors that fell to the ground and there was a disaster on the ground, so the Yu Dynasty civilization began to migrate to the underground, I think the so-called disaster should be the meteor hit the earth, causing some natural disasters, so that the ground human beings could not survive and were forced to relocate." ”

Li Zhibao said: "It should be like this, yes, the Yu Dynasty civilization on the ground was destroyed because of this, and some of the surviving Yu Dynasty people were transferred to the underground world, and they survived and built the ruins we see now." ”

Through these murals, everyone slowly understood the reason why there were ruins of the Yu Dynasty civilization underground.

Soon, Xiao Ling followed Li Zhibao to the last mural.

This is the last mural, and the weirdest one.

The mural depicts the earth, and in the depths of the earth there is a blood-red vortex, in which a clawed black sun is drawn, and countless villains are dancing around this black sun, and above the earth, blood-red flames rise, and above the flames, they are drawn with lines of various colors that cannot be understood, as if to represent a kind of chaotic order.

Xiao Ling couldn't understand the last one, he only vaguely felt that the last mural was bizarre and weird, and couldn't help but look at Li Zhibao, hoping to hear his explanation.

Li Zhibao stared at the last mural tightly, his face became more and more ugly, and he muttered: "Thousands of years ago, what kind of terrifying scene did the people of the Yu Dynasty encounter, the meteor fell to the ground, bringing some kind of unknown monster, this monster still exists at the bottom of the earth, and there are countless dancing Yu Dynasty people around it, this represents a kind of sacrifice, does the people of the Yu Dynasty please the monster through sacrifice?" Or in exchange for something......"

He was groaning.

Xiao Ling listened to his words and said, "Professor, the black sun in the center represents some kind of monster, the blood-red vortex represents some supernatural mysterious phenomenon, the little people dancing around are sacrificial, what do the flames on the earth and those lines above mean." ”

Li Zhibao said: "It represents the earth in a catastrophe, shaped like purgatory, and the chaotic colored lines at the end of it represent chaos, indicating that everything will return to chaos in the end." ”

Yu Tingting kept following the two of them, just silently looking at the murals without speaking, and said at this moment: "Professor, if everything painted in these murals is true, then it is said that the people of the Yu Dynasty thousands of years ago were forced to move underground, but the monster brought by the meteor falling to the ground did not disappear, it still exists in the depths of the ground, this monster can show some special power, for the people of the Yu Dynasty thousands of years ago, this is an incomprehensible supernatural power, I don't know what kind of phenomenon this blood-red vortex represents. ”

Li Zhibao said in a deep voice: "Yes, these Yu Dynasty people must have encountered a disaster that we can't imagine back then, and they were forced to move, but the disaster did not stay away from them, but followed them to the underground, what is the disaster that is depicted as a monster, and what is that mysterious scene, thousands of years have passed, and we can no longer know all the truth about the events of that year." ”

As he spoke, he shook his head and sighed: "The only thing that can be known is the origin of these Yu Dynasty civilization ruins, and why the Yu Dynasty people thousands of years ago established the capital in this underground world thousands of meters above the ground. ”

Yu Tingting suddenly said: "Professor, my thoughts are different from yours. ”

When Xiao Ling heard Yu Tingting say this, he became interested and said, "Then what do you think." ”

Yu Tingting didn't look at Xiao Ling, a pair of beautiful eyes kept staring at the mural in front of her, and said slowly: "We went all the way here, and encountered all kinds of dangers, maybe it is related to the monsters that were depicted in the murals by the Yu Dynasty thousands of years ago, even if thousands of years have passed, who can be sure that the monsters in the underground must not exist?" ”

Yu Tingting's words shocked everyone's hearts, Li Zhibao took a deep breath, and said: "Yes, what you said has a certain truth, the mural ended because of this, no one knows what happened behind it, and no one knows whether the underground monster and a mysterious phenomenon it represents continue to exist." ”

Everyone is attracted by these bizarre and strange murals, no one knows what era these murals were painted in, but the colors are still bright and dazzling, making it hard to believe that they were painted thousands of years ago, especially the ancient buildings around them, which are so well preserved, not to mention that they have gone through thousands of years, but like everyone has traveled through time, entered the underground capital thousands of years ago, and witnessed everything thousands of years ago.

Suddenly, Sun Tao let out a loud shout: "Who is it?" ”

Everyone was awakened by his voice, and they were busy turning back, but they saw that a figure seemed to flash in the darkness in the distance, and then disappeared.

Sun Tao's face was a little ugly, and he held a searchlight in his hand to check carefully, but it was empty, and the figure disappeared.

"Sun Tao, do you see anything?" Zhou Kesheng saw that Sun Tao's face was a little wrong, and he was busy asking.

Sun Tao was a little surprised, and said: "There was a person hiding over there just now, as if he was spying on us, and I was scared away, but that person looks ...... looks very much like Zhang Shuang. ”

"Like Zhang Shuang?" Everyone looked at Sun Tao.

Zhang Shuang is also a member of the scientific expedition team, has been in charge of instruments and equipment, before everyone climbed down through the canopy of the undead tree, Zhang Shuang was pounced on by the cannibal beast, most of his face was bitten off, and he fell down with the fox, I am afraid that he would have died a long time ago, how could he appear in the dark to peep at them now?

Hu Shengzhe frowned and said, "Sun Tao, are you dazzling?" Zhang Shuang is dead, how can he peep at us in the dark? Besides, if Zhang Shuang is really not dead, he will come out to see us directly, how can he secretly stare at us and be scared away by you. ”

Sun Tao touched his forehead and said, "Yes, maybe I'm dazzled, but I just look like Zhang Shuang." ”

Zhou Kesheng said: "Now it seems that in addition to us, there are really other people in this underground, maybe the people who set traps, these people are difficult to argue with friend and foe, we have to be more careful now." ”

Xiao Ling silently listened to what everyone was saying, and couldn't help but glance at Wang Weiguo, who had been silent in the crowd.

Things are getting harder and harder to understand.

First, a corpse that looked exactly like Wang Weiguo was found in the sarcophagus of Yu Temple, and now Sun Tao saw a person who looked like Zhang Shuang in the dark, and Zhang Shuang was obviously dead.