The two searched through the ruins for a while, and it didn't take long to find a well, the diameter of the well's mouth was about two meters, and the well was filled with yellow sand.

Lin Geni looked around and saw that the yellow sand was still flowing slowly, and it was estimated that it would not be long before the yellow sand would fill the space here, and it would be more difficult for them to get out. Luo Lie signaled her not to worry, he temporarily lifted his nano armor and reached out directly into the yellow sand at the wellhead, and found that the yellow sand in the wellhead seemed to be different from the temperature outside.

Hearing what he said, Lin Ge Ni used the detector to probe and found that the temperature of the yellow sand in the wellhead was 5 °C higher than that outside, and it was preliminarily deduced from this that the part of the wellhead that was covered by the yellow sand may have another mystery.

Luo Lie took out the armory shovel and began to clean up the yellow sand inside the wellhead, it took more than ten minutes, and he had dug to a depth of about two meters, and the top of the armory shovel touched the hard metal panel, rubbing a squeaky and rattling sound.

Lin Geni admired Luo Lie's keen insight, and it was unlikely that others would have noticed such a subtle difference in such a situation.

Although the metal cover was dug in a short time, it would take a long time to use the ordnance shovel to clean up all the yellow sand on it, Luo Lie used a laser beam to cut a hole in the cleaned part of the cover, and the yellow sand flowed down quickly along the hole, and soon the yellow sand on it was lost, and the entire cover was exposed in front of them.

Illuminating from the incision, she saw the bottomless well hidden beneath the cover.

Luo Hunter touched the back of the metal cover, and did not feel any moisture, if there was water underneath, it would usually condense and vaporize water droplets here.

Lin Geni said, "Do you still want to go down?" In fact, she already knew the answer when she asked, and Luo Lie should go down.

Luo Lie nodded and said, "Go down and take a look, maybe you can find some treasures." "He is not a greedy man for money, and after the vicissitudes of life, his view of money is much more indifferent than that of most people. Even the rare treasures hidden below could not impress Luo Hunt, and the reason that really drove him to enter the bottom of the well to find out was the divine spring that Shagazan talked about.

Rushed to the hospital when he was sick, for Luo Lie, whenever there was a glimmer of hope, he would do his best, there were too many tragedies that happened around him, and he didn't want the tragedy to continue to happen again.

Lin Geni grabbed Luo Lie's hand, and she shook her head vigorously, indicating that she was unwilling to go down.

Luo Lie said softly: "Don't be afraid, I have everything with me." ”

Lin Geni is actually not afraid, her time is short, death is nothing more than a matter of time for her, what is there to be afraid of, she is afraid that Luo Hunt will encounter danger.

Luo Lie said: "I don't want to leave regrets. ”

Lingeney bit her lip, but finally let go.

Luo Lie cut the metal cover to be able to accommodate one person to pass through. After fixing the steel cable, the two of them slid down along the steel cable one after another, Luo Lie pulled out a lighting rod, bent it, and threw the red lighting rod down, and the lighting rod fell under the action of gravity.

Judging from the time when the lighting rod stopped falling, Luo Lie found that the depth of the well was about 100 meters. He did not rush to descend to the bottom to illuminate the surrounding wall of the well, the overall structure of this dry well is large at the bottom and small at the top, the closer to the bottom, the wider it becomes, and the long dragon circling along the wall of the well can be seen around,

The dragon's tail is located at the mouth of the well, and the dragon's head is located at the bottom of the well, and when they come to the bottom of the well, they can see that there is a huge dragon's head at the bottom of the well, and the dragon's head is carved from a black stone.

The bottom of the well had dried up and cut off, and the dragon's mouth was wide open, Luo Lie looked at the inside of the dragon's mouth with the help of the beam, and found that there was no hole in it.

Lin Geni said, "Do you feel that something is missing?"

Luo Lie said: "What?"

Lin Geni said, "Should there be a dragon ball?"

Luo Lie visually measured the size of the dragon's mouth, if there was really a dragon ball, then the diameter of this dragon ball should be about two meters, and it was not so easy to transfer such a large dragon ball. He picked up a stone and struck it on the ground, the bottom of which was supposed to be ground.

Lin Geni also used the detector to check the surrounding situation, and initially ruled out the possibility that there were hidden tunnels around, and she whispered: "Let's go, it's just a depleted ancient well." ”

Luo Lie was still a little unwilling, brushing away the floating sand on the ground, hoping to find some clues.

By this time, the quicksand had overflowed the wellhead above and poured down through the holes in the metal cover, and Lin was a little worried that if they delayed any longer, they might be buried alive in the well.

"Let's go, it's too late. ”

Luo Lie said: "Where did the sand go just now?"

After he reminded her, Lin Geni remembered that the yellow sand piled up on the cover plate of the wellhead just now should have all poured to the bottom of the well, and although there was a lot of yellow sand in the place where they were standing now, the amount was still small, in other words, the yellow sand that fell from above must have another place.

Luo Lie found the gap from the direction of the flow of the yellow sand, the gap is located under the dragon's head, the yellow sand is gathered in the same direction, and an oval-shaped hole can be seen under the dragon's head. Although there was a gap, the width of the gap was not enough for them to pass through, and Lin Geni hoped that Luo Hunt would leave as soon as possible, but Luo Hunt would not give up easily what he had identified. He decided to carry out the detonation in the mandibular part of the dragon's head.

After placing the bomb, the two came to a relatively safe place to hide, Luo Hunt detonated the bomb, this explosion will blow up the jaw part of the dragon's head, the sound and air wave caused by the explosion make the sand and dust in the well churn, fortunately they have the protection of the nano battle armor, otherwise it will be difficult to survive the impact of the blast wave.

Luo Hunt raised the explosion yield to the highest value within the range that the nano battle armor could withstand, and after the violent vibration caused by the explosion, the bottom of the well on which they were standing suddenly sank downward, because they had grabbed the steel cable in advance, although their bodies sank, they did not stumble and fall.

The length of the steel cable was not long enough to reach the bottom of the lower space, Luo Lie and Lin Geni glanced at each other in the dust, and the two nodded, and let go of the steel cable at the same time.

The bodies of the two are in free fall, and the speed is also increasing, Lin Geni measured the distance between them and the bottom according to the index, and when they were still about fifty meters away from the bottom, they activated the deceleration function of the warframe at the same time, and the speed of the descent slowed down rapidly, and when they were still five meters away from the ground at the bottom, the nano warframe had successfully slowed down their descent to a safe range.

Under their feet is an underground river, the water is turbulent, the width of the river is about fifty meters, the position where they fell is just in the center of the river, according to the feedback of the detector, the depth of the river is more than sixty meters, the two did not choose to fall blindly, but used the flight function of the battle armor to come to the north bank of the underground river.

The riverbank is a soft sandy beach, and Luo Hunt looks around and conducts a safety assessment of the surrounding environment at the first time.

Lin Geni looked up, the explosion just now blew through the bottom of the well, and the yellow sand above formed a quicksand waterfall, which continued to leak into this hidden underground world through the hole created by the explosion, but the flow speed of the yellow sand was obviously slowing down, and it seemed that it would not be long before the gap above would be blocked by the yellow sand, and the underground world would be closed again. Lingenie couldn't help but be a little worried, what if they couldn't find a way out before they ran out of food?

Luo Lie came to the river and stretched out his hand to test the temperature of the water, the river water was warm and moist, different from the usual cold and bone-chilling groundwater.

Lin Geni tested the water quality and found that the water here is surprisingly good, it belongs to the kind that can be drunk directly, although it is deep underground under the sand sea, but the air here is not toxic.

The two opened their hoods, Luo Lie bowed a handful of river water and drank it directly, Lin Geni was also a little thirsty, and filled the kettle after drinking water.

Luo Lie said: "Are there any large rivers or lakes around here?"

Lingene shook her head, they were in the core of the desert, not to mention nearby, there were no large lakes even within a radius of a hundred kilometers. She understood the reason for Luo Lie's questioning, the scale of the underground river in front of her was not small, and the flow was extremely large, and it must be connected to a large water source.

Luo Lie said: "Historically, this place was not a desert, but had a big river. ”

Lin asked herself that she had some research in history and geography, but in her knowledge there were no big rivers here.

Luo Lie had already seen her confusion from her face, and said with a smile: "This big river appeared for a short time, according to legend, before Dayu ruled the water, the flood was raging, the rivers and lakes were diverted, and a big river called Liantian River appeared in this place. ”

Lin Geni said: "You mean legends. After all, the history of the Xia Dynasty has not been officially confirmed, and although what Luo Lie said has appeared in myths and legends, it has not been recognized by historians.

Luo Lie said: "Even if it's a legend, but we should be able to find something, if it wasn't under the sand sea, how could we find this big river?"

Lingeney nodded: "Downstream or countercurrent?"

Luo Lie said: "Swim against the current!" Only a life against the current is meaningful.

The two of them made their way up the river, which at first was covered with soft yellow sand on both sides, but after two hours of their advance, the river suddenly narrowed, and the rushing water gushed out of two huge rocks, and they had to climb the rocks to continue on.

They climbed the rock and found that it was clearly artificially carved, with the rocks stacked on top of each other, and the riverbed rising as the terrain changed. Halfway through the climb, Lin Ge Ni looked back, but saw that the big river around her was gushing like a waterfall, majestic, and the sound of the water was like thunder, which was deafening. Lin Ge Ni said loudly: "Do you feel like a reservoir opening the flood gates?"

Luo Lie nodded, it is true, the scene in front of him is like a reservoir discharge, according to these stones, there is a chance that this is a large-scale water conservancy project. It stands to reason that the project was originally located on the surface, but was later buried by quicksand as the landscape changed, but it is a little puzzling why the yellow sand has not completely submerged the place after so many years, and the underground river and adjacent buildings have not suffered much damage.

Climbing along the layers of boulders, when they came to the heights, it was pitch black all around, Lingeney shot a flare in front of them, and a large complex of buildings appeared in front of them, Luo Lie and Lingeney were both shocked by what they saw, this is a city that has been submerged under a sea of sand, the city used to be built on a mountain, the underground river runs along the central axis of the city, and on both sides of the underground river are all kinds of buildings built on the mountain.

Except for the sound of the river flowing, there is no breath of life, no humans, animals, plants, they have not even seen a small grass, a moss, a bug, this is a place where the sun does not shine, this is the forbidden area of life, it is a corner forgotten by the world.

"How can there be such a place? It is so large that it has been hidden deep underground for so many years and has not been discovered, and it has not been buried by the sea of sand, and it has basically retained its former appearance. ”

Luo Lie took a few steps forward and said in a low voice, "There may have been an earthquake here, the earthquake caused the entire city to sink, and then the cracks were squeezed and narrowed, so the city fell into darkness. He saw a crack ten centimeters wide in the rock beneath his feet, and the further he went, the more cracks he felt.

Lin Geni looked at the cracks like scars on the rock formation, and couldn't help but be secretly frightened, if Luo Lie guessed, the earthquake that year must have been thrilling, it can be described as the sky and the earth cracked, a city, a city built on a hill disappeared without a trace in an earthquake, and there is no record in history.

The place where they first fell into the quicksand and saw the stone pillars was supposed to be related to the city, but Lingane suddenly stepped on something, looked down, and saw a twisted iron pickaxe under his feet. She picked up the iron pickaxe, and Luo Hunt also came over, and immediately judged that the iron pickaxe should be a modern product, which means that someone had already arrived here before them.

"It seems that we are not the first to discover this place. ”

Luo Lie said: "Didn't Shagazan say that there used to be mines in this area, and then it was abandoned because of an explosion. ”

Lin Ge Ni said: "Could it be that in the past, it wasn't mining, but it was just using mining as a cover, and the real purpose was to explore this underground city?"

Luo Lie smiled, Lin Genie's statement was just speculation, but this possibility could not be ruled out.

Lin Geni added: "Maybe the mineral deposits were discovered in the first place, and they were indeed mining, but after the mining disaster caused by the explosion, this place was abandoned, and the miners who were killed did not die at that time, and the survivors looked for a way out everywhere, so they found this place." ”

Luo Lie nodded, this possibility should be greater.