Summarizing the information revealed by the funeral, the sand-buried ancient city may have been built underground, not buried under the loess due to geological changes.

So are there still people living in the ancient city, and what is the reason for forcing these people to live away from the sunny ground and into the deep underground?

She was deeply immersed in the memories that she had seen the sun for the first time in her life, and on the auspicious day chosen for the sacrificial refining, they were ceremoniously carried to the altar like goods, passing through the quaint city streets, with a huge sun hanging overhead.

For the first time, he felt the bright sunshine: "Our city is so beautiful, and there are so many people surging in the streets, all lined up on both sides to welcome us. No, it should be the send-off team, and we all have great respect for it, thinking that this is the best courtesy, the supreme honor. As everyone knows, Mourning does not expect this kind of glory.

In the cavern, as the sound of murmuring water approached, a ray of light came to the road ahead.

Zhu Beichen frowned and said, the scope of the ancient city may be surprisingly large, no matter which door you enter, it is on the 81 passages of the ancient city, since there were only nine doors at the entrance at the beginning, according to the evolution of Qimen Bagua, it is not surprising that there are nine forked roads in each passage. There may have been more than one tragedy in that era, because the sorcerer needed a huge guardian force to build a huge underground entrance and exit structure.

Han Qingxin suddenly stopped and said, "Wait, it seems that there is that underground river ahead." ”

The sound of the flow of the dark river, the sound of the water hitting the riverbed, and the convergence of all kinds of dark and deep music, bring people a very ominous feeling.

Waiting for his group in front of him must be a fierce place, Han Qingxin will not forget this door, it is a "dead door".

The air in all directions smelled of dampness, indicating that the dark river ahead was near.

The fat man straightened his ears and judged: "No, listening to the way the sound turns, the terrain under the ground should be ......"

Zhu Beichen was also interested in the fat man, and he could judge the terrain by listening to the sound, how did the fat man's ears grow, "What's wrong with the terrain?" ”

His face was extremely ugly, "The underground canyon, the dark river is below the canyon. ”

The sound of the water flow is a little empty, the sound source comes from the feet, listening to the sound of the water turning, Zhu Beichen also has a hunch, the river flows under his feet, and listening to the fat man's judgment seems to have a little bit of truth.

If the buildings of the sand-buried ancient city are located underground, the residents in the city will naturally follow the nearby river to draw water, and the discovery of the underground river does not mean that the ancient city is actually not far from a few people?

It's a pity that she doesn't know much about the ancient city where she lives, and she spends more of her time being raised as a sacrificial object in a cultivation vessel, and can't be expected to provide much useful information from her.

What the hell is the place ahead? Zhu Beichen could only ask in his heart, looking forward to how much he could remember the starting point.

"I just remember that there was a river running north and south of the city where we lived, and the water was brought in by a big river outside the city." The ethereal figure followed behind Zhu Beichen and followed him in an invisible way.

"Is there a canyon where the river comes from, and where does the water come from?" Zhu Beichen asked.

"That river is a mother river for the people of our ancient city, and our drinking water is taken from that river, and the temperature of the river is extremely low, and I heard that it is a branch of a huge water system." She can only explain this, after all, she doesn't know much.

The temperature of the river is extremely low, the temperature of the groundwater is indeed like this, in the case of lack of light heating, without the heating of underground heat resources, the water temperature of the dark river will not be too high, and the mysterious river is about to be revealed. What kind of river is it, and what is its relationship with the ancient city buried in the sand?

Han Qingxin said: "Since ancient times, cities have been built on water sources, where there is water, there are people, if this river has something to do with the ancient city buried in the sand, then the most convenient way for us to reach the ancient city is to follow the river." ”

Neither the fat man nor Zhu Beichen expressed any objections, obviously her analysis was reasonable, not to mention that there was no trace of the dark river at present. After deliberation, several people decided to continue in the direction of the sound of water, and there was only a straight road ahead, and the cave gradually became open.

The rocks on the surface were wet, and the fat man stumbled and almost fell to the ground, and the ground was already full of moss, and this plant would only grow in a perennial humid environment. Zhu Beichen picked up the fat man, and the three of them walked in the cave with great care against the wall, and after a long time, a sudden fresh air came to the nose, and a more open space at the end of the field of vision appeared in front of them.

Now the position where the three of them stood was a semi-suspended platform covering a huge area, looking at a deep rift valley in the distance, and the scenery on the opposite bank was hazy, and behind an open field it looked like a dense forest, a forest belonging to the underworld.

The world suspended below was thousands of feet deep from the platform where the three of them were, and the surface of the canyon could not be seen at a glance, and the constant sound of water came from the world under their feet.

The visual shock brought by the majestic scene is strong, and the fat man inexplicably took a deep breath in his heart, and a sense of awe arose spontaneously: "Whew, the word "abyss" is to describe this, nature's handiwork is really grand." ”

The distance between this end of the platform and the other end of the platform is a hundred meters, and the platform seems to be the end of this world, and the far end of the platform is like the beginning of the other world, and the middle is across a wide canyon, which is the canyon that separates the two ends of the world and becomes an insurmountable chasm.

Han Qingxin's face was embarrassed, he never expected that he would end up in a desperate situation, if he turned back, he might not be able to return to the side hall in the Sun Tomb, the door composed of formations must have been closed, "This is the desperate situation of the Death Gate, if there is only a gap of twenty meters, I may still try to run and jump over, now there is a hundred meters wide in the middle, even if I can fly, I am afraid that it will not work." ”

Heavenly moat, died in the unknown space to warn Zhu Beichen.

This feeling seems to be innate, "We call it the moat, a barrier at the entrance to our home, which is said to be made up of a canyon ten thousand feet deep. Mourning explained.

Since it is called a moat, it must be a barrier to block intruders from the outside world, Zhu Beichen asked, how can we pass through?

At the same time, the fat man lay on the edge of the platform, poked his head out and stared into the underground space, compared to the bottom of the canyon, this small piece of 100 square meters of platform is insignificant, but it is like hanging in the clouds, surrounded by clouds and mist are full of rising water vapor.

"Heh" The fat man sighed, a sense of dizziness in his mind, because the depth of the canyon is too deep, it looks panicked, for fear that if you are not careful, you will fall into the abyss of no return, "Deep enough, if you fall down, there will be no bones." ”

The three of them are now exhausted, and the width of the canyon has exceeded the limit that people can cross, and it is impossible to cross the moat mentioned in the mouth without the support of auxiliary tools.

If you say that the biggest obstacle after the door of death is probably this moat.

"Hey, I said, what's the shiny thing down there. I'm not dazzled. The fat man wiped his eyes, and at first thought he was overly hungry, and the dizziness and fear of heights caused by the depth of the canyon. After a closer look, I was really sure that a trace of floating light floated up from the dark river below the canyon in a trance, "Take a look, tell me, is this a firefly?" ”

Wisps of milky white light floated in the space, floating up at an easy and slow speed, and the number of halos was huge and spread throughout the vast canyon space. The visual sense is extremely strong when viewed from a high place. Hearing this, Han Qingxin and Zhu Beichen both came to the edge of the platform and lay on the ground, poking their heads out and looking down at the canyon, both of them with a sense of consternation.

Han Qingxin exclaimed: "It's so beautiful, just like the bright stars in the night sky." The words are full of joy, and the visual beauty attracts the attention of women the most, and if it is starry, it is far less than the strange underground scene in front of her.

Zhu Beichen's face was pale, generally speaking, the underground anomalies were some kind of evolution of the natural world, but thinking of the ancient Loulan people's superb sculpture skills in the natural world, they could build a magnificent underground ancient city, so the ability to transform the natural world was undoubted. Could it be the result of another transformation of nature, could it be that this halo has flickered in the canyon for thousands of years?

Despite the slow speed of the halo's movement, after half an hour, the first halo slowly climbed to the edge of the platform where the three of them were. The fat man's body was less than a meter away from the halo, and he sniffed vigorously, and suddenly his heart was overjoyed: it was water, and the light of this Nima was made of water.

The fat man pursed his dry lips and was about to pluck the ball of light with one hand. The ball of light is about 10 centimeters in diameter, and the whole body is wrapped in a milky white halo, revealing a stream of moisture, and the sparkling image is reminiscent of precious water sources.

"The water," said Yan in the dark, shaking his head in the dark, "you can't drink it." ”

The entire platform was surrounded by a halo of light, as bright as day, as soon as he heard the reminder, Zhu Beichen shouted to stop the fat man: "I'm dizzy, you can't drink that water." Afraid that the fat man would keep persuading, he squatted down and grabbed a stone on the ground, and smashed the ball of light aimed at the fat man's side.

smashed into the ball of light impartially, without a splash of water, and the stone quickly sank into the ball of light. In the blink of an eye, a cloud of dust splattered from the body of the light ball, which was the stone that had been thrown into it earlier.

The fat man quickly retracted his hand in mid-air, and inhaled with palpitations, thinking: What kind of thing is Nima, it is so corrosive, even the stones are corroded in an instant, if my white and tender hands touch it, there will be no bones left.