However, because the sandstorms in Lop Nur are so frequent, it is difficult to clean up the yellow sand on those low buildings, so it looks like one small sand dune after another, stretching to the end of Fang Yi's line of sight, which is thousands of kilometers long.

Seeing Fang Yi looking at the building on the ground, Zhou Dahai introduced to Fang Yi: "This place used to be a qanats, and I don't know what age it was, so we renovated it and it can be used." ”

"What is a qanaq?" Fang Yi was stunned for a moment when he heard this, he had never heard of this term.

"The qanats are a kind of underground architecture unique to the people of the Xinjiang region, which was invented by the ancient people. ”

Before Zhou Dahai could reply, Wei Mingcheng said: "When we passed by the Gobi Desert before, did those small dirt bags look a little similar to here? But I didn't expect that there were qanats in the depths of Lop Nur. ”

Hearing Wei Mingcheng's explanation, Fang Yi realized that the origin of this karez is not small, and it is even called one of the three great projects in ancient times.

The so-called qanats are excavated underground in the desert and the Gobi Desert, dug until there is an underground river, and then continue to dig along the water source, and then reinforce with wood to make it run through the vertical and horizontal underground, and the karez in the whole territory is more than 5,000 kilometers long, which shows the prevalence of qanats in the territory.

It is said that qanats first appeared in Iran with a history of more than 2,000 years, and the territory located in the center of the Silk Road, where ancient Eastern and Western cultures converged, accepted the method of water diversion from the West, and thus dug the first qanats.

Qanats can be very important for the Xinjiang region, you know, the climate of the Xinjiang region is very arid, precipitation is scarce, and the rivers are often cut off, but in this extremely unsuitable place for the growth of crops and fruits, it will miraculously grow green fruits and vegetables.

All of this is due to the nourishment of the qanats, and a large part of the water used for life and production in the Hami Basin of Turpan today comes from these ancient qanats.

Not only does the qanats have a source of water, but they are also suitable for people to live in, and they can withstand the heat and cold of the territory outside, and until modern times, families in many areas of Xinjiang continue to dig and expand the area of the qanats every year.

Wei Mingcheng used to go to the Xinjiang region to carry out some secret missions, because he knew the karez in the Xinjiang region very well, when he was chasing a criminal, he caught the person in the karez, so Wei Mingcheng also lived in the karez for a period of time.

"The qanats here are so badly damaged that it took a lot of effort to renovate them before they can be used again. ”

Zhou Dahai added Wei Mingcheng's words, in fact, until now, they have been constantly reinforcing the karez left over from this unknown era, according to Zhou Dahai's knowledge, not only their generation, but also the soldiers who were stationed here before are also doing the same thing.

"Can people live under the sand?" Fang Yi asked with some curiosity, although his cultivation was very high, he didn't know a lot of common sense.

"It's not all sand underneath it. ”

Wei Mingcheng laughed when he heard this, and said: "Sand and gravel are easy to store water, usually there are dark rivers more than ten meters below the sand, some are mud structures, some are rock structures, Brother Zhou, are you dirt or rocks underground?"

"It's dirt. Zhou Dahai hesitated for a moment when he heard this, and said: "This is not very different from other karez. ”

"Oh, how is it different?" Wei Mingcheng was stunned for a moment.

"You will know when you go down, and the place where you are going is down there. Zhou Dahai didn't say much.

"Alright, let's go down. Fang Yi nodded, suddenly stood on his feet, and asked, "Before us, did anyone else come?"

"No, except for those who are fed, you are the first batch of people in the past ten years. Zhou Dahai shook his head.

"They haven't arrived yet. Fang Yi and Wei Mingcheng glanced at each other, followed behind Zhou Dahai, and lowered their bodies to drill into the entrance of the qanats.

Although the entrance was very narrow, after walking more than ten meters down, the scene in front of Fang Yi suddenly opened up, on both sides of the gurgling underground river, there was a space about three or four meters high, and it was actually invisible at a glance, it looked very open.

In the open space on both sides of the underground river, there are marching tents set up, Zhou Dahai and others should live here, living in tents for ten years, and the difficult environment can be imagined.

"This, is this still a qanats? Why is it so big?"

Fang Yi and the others didn't think anything, but Wei Mingcheng was frightened, under normal circumstances, the karez is more than one person high, barely three or four meters wide, where it will be like here, there is no problem if it is open and afraid of running horses.

"How could the ancients dig up such a large space?"

Zhang Wen and Si Yuanjie next to him also felt a little incredible, because in this qanat, not only the mud structure, but also the rocks on both sides, in the absence of modern explosives, they couldn't imagine what tools the ancients used to dig it out.

"It's ancients, but it's not necessarily the ancients you think. ”

Fang Yi didn't have the same reaction as Wei Mingcheng, because Fang Yi had seen a more magnificent building than this, and the giant city in the secret realm in Cambodia was a hundred times more difficult to build than here.

Therefore, the things involving evolutionaries cannot be explained by common sense, just like the Mayan temple in the Amazon jungle that Fang Yi went to not long ago, and the large stones weighing several tons also created that kind of building without modern machinery.

"It's nothing here, there's a bigger building down there. ”

Seeing the surprised looks of several people, Zhou Dahai shook his head with a smile and said: "Some scientists have come to conduct scientific expeditions before, saying that this was originally a city, and it was gradually buried by mud and sand after it was barren. ”

"Where, take us over, by the way, there is another person there, right?" Fang Yi nodded, he knew that the place Zhou Dahai said should be the entrance to the secret realm, and according to Zhang Yi, there should be someone guarding there.

"Yes, we can't go in that place, and he can't come out. ”

Zhou Dahai showed a wry smile on his face, people will be curious, he has been guarding here for more than ten years, Zhou Dahai is naturally curious about what is in the dungeon, but he still has to abide by the discipline of the army. ”

"If he can't come out, how can he eat?" Fang Yi was stunned for a moment when he heard this.

"We sent him here, and I've been here for more than 10 years, and I haven't seen what he looks like. ”

Zhou Dahai walked to the front with Fang Yi and the others, and said as he walked: "It just so happens that it's almost time to start eating, do you want to finish eating and then go over?" Although there is nothing delicious here, there is still some wild meat in the territory. ”

Lop Nur is not as dead and silent as people think, in fact, there are still many animals here, from yellow sheep and wild horses to wild camels and sand lizards, there are many edible animals, and the soldiers stationed here will use these animals from time to time to practice marksmanship and then make a tooth sacrifice.

"No, take us there. ”

Fang Yi shook his head, the backpack on his body contained marching compressed biscuits and canned food, although the taste was average, it was enough to replenish the physical consumption of Wei Mingcheng and the others, there was no need to delay time in this place, Fang Yi was also afraid that if he collided with Zhang Yi and the others who were about to come later.

"Okay, I'll take you there. ”

Hearing Fang Yi's words, Zhou Dahai was a little disappointed, he had been here for more than ten years, he really wanted to know some of the situation outside, and more importantly, there were women in Fang Yi's party, even if Zhou Dahai was a very upright soldier, he would inevitably want to get along with Fang Yi and the others for a while longer.

In fact, not only Zhou Dahai, but also the soldiers under him are also secretly aiming at Bai Chuxia, as the saying goes, if you don't see a woman for three years, even if you see an old sow, you will feel beautiful, not to mention a big beauty like Bai Chuxia who takes off her veil.

After walking about three or four hundred meters in the qanaq, the surrounding soil gradually became less, and the rocks were more, and he stood in front of a huge rock, Zhou Dahai pushed it hard, and it was strange to say that the boulder weighing a thousand catties was slowly moved away under Zhou Dahai's push.

"There's a trap under the rock. ”

When the rock was pushing, Fang Yi clearly heard the sound of the machine spring in his ears, and suddenly his heart was clear, his eyes looked forward, behind the rock, there was a road that was only three or four meters long, and at the end of the road, there was a downward pothole.

"Xiao Zhou, why are you here so early today, it's not time to start dinner yet, right?" Just after the boulder was pushed away, an old voice came from under the pit, and it could be seen from the person's name for Zhou Dahai, who was in his forties, that he was not young.

"Old Du, an outsider is here. Zhou Dahai has a lot of respect for this person, in his opinion, anyone who can spend his life guarding a thing is worthy of respect, he himself is like this, and the same is true of the old Du who is guarding below.

"Hmm, came a day earlier than I thought?" the old man's voice sounded again, "Is it Zhang Yi?" Hey, I heard that the old Song crow has become a phoenix, and now there are not many people in your organization who know me. ”

"Old Du, Zhang Yi will be here later, my name is Fang Yi, Zhang Yi should have mentioned it to you, right?"

Since the person below asked, Fang Yi naturally wanted to answer, and threw down the enshrinement sign in his hand as he spoke, he was not afraid that this person would not let him go down, because in Fang Yi's induction, this person was also a martial artist at the peak of the day after tomorrow, and it was impossible to stop him.

"Zhang Yi mentioned it to me. ”

The old man below was silent, as if he was checking the sign, and after a long while, his voice sounded again, "You came here, it seems that there are some non-compliances, it stands to reason that you should enter with the children of various families." ”

"Can I go down?" Fang Yi didn't answer Du Lao's words, but said straight to the point, coming to this secret realm, Fang Yi originally planned to overwhelm people with power, and there was nothing polite to say.

"Yes. There was silence for a while, and a bitter laugh came, "If you want to come down, I can't stop it, okay, Xiao Zhou, you go back." ”

"Old Du, is there no problem?" Although he couldn't understand the conversation between the two, Zhou Dahai also saw that something was wrong.

"Xiao Zhou, there is no problem, you go back and let them come down. "Du Lao heard that Song Tianyu and Zhang Yi had both said about Fang Yi, and knew that this was a real cultivator, far from being something he could stop, and besides, Fang Yi was also a member of the hidden group, Du Lao had no reason not to let him go down.

"Okay, Old Du, if something happens, you can ring the bell and call me. ”

Zhou Dahai nodded, there is a bell in the karez, which is what Zhou Dahai and Du Lao use to connect, and it is strange to say that when Du Lao shakes another bell below, the bell above will also ring at the same time.

"Go, go. ”

Du Lao urged Zhou Dahai like a person, he knew that since Fang Yi was here, the forces above guarding here would have no effect, in front of a cultivator, unless it was a high-power lethal weapon, it would not be able to threaten an innate cultivator.

After Zhou Dahai left and closed the boulder portal, Fang Yi walked to the pit, from the time he entered the underground, there was an oil lamp every short distance, although it was not very bright, but it was enough for Fang Yi to see the situation below.

The pit is straight down, about two or three square sizes, and next to the pit there is a hanging basket with some dishes and chopsticks, presumably used by Zhou Dahai to deliver food to the people below, and at the edge of the pothole, there is a circle of protruding stones, which spread down like steps.

"Du Lao, I'm down. ”

Fang Yi was the first to go down, the pit was about ten meters deep, perhaps because no one walked all year round, those protruding stones were covered with moss, Fang Yi used his feet to grind off those mosses with every step he took.

"It's been more than 20 years, and I've finally seen someone coming again. ”

As soon as Fang Yi's feet stepped on the ground, Du Lao's voice sounded in front of him, and following the prestige, an old man with white hair and a somewhat pale face sat in front of Fang Yi, the reason why he was sitting was that his legs were cut off from his knees, and under him was a wheelchair that looked a little shabby.

"Old Du?"

Fang Yi's eyes stared at the old man in front of him, his face was a little puzzled, after looking at the old man's eyes, Fang Yi clearly felt that the strength of this old man's divine sense was not below him, but why was the qi on his body an acquired martial artist?

"It's no surprise that I'm a half-footed wasted person. ”

Seeming to see Fang Yi's doubts, the old man smiled bitterly and said, "I'm okay to deal with the acquired martial artist, but in front of you, I will be vulnerable, don't be afraid of what the hell the old man will do, in the face of absolute strength, any tricks are useless." ”

For Du Lao's words, Fang Yi recognized it very much, even if the old man in front of him had a strong divine sense, but Fang Yi was still sure to take him down in an instant, with no divine sense and no equal strength, Du Lao was equivalent to a toothless tiger, and he could only use his momentum to scare people.

"Du Lao, what kind of place is this?"

Fang Yi's attention was taken away from Du Lao's body and looked around, at this time, the space Fang Yi was in was a building completely made of stone, about four or five meters high, with an arc at the top, and various lines were carved on these stone walls.

This building was not just this one, Fang Yi saw that there was a passage behind the old man, which must lead to other places, and in this space Fang Yi did not find the existence of such a teleportation array and light curtain.

"It's a dungeon, and it's also a place where the ancients practiced and lived. Du Lao didn't hide anything, and said, "The place you are going to is in the back, come with me." ”

Shaking the wheelchair, Du Lao stepped back, and Bai Chuxia, Wei Mingcheng and the others hurriedly followed behind Fang Yi, they were all surprised by the magnificent building underground, and their eyes kept looking at the stone wall pattern.

As the old man said, this is indeed a city many years ago, out of this room, what is presented in front of Fang Yi and the others is a spacious street, the street floor is paved with bluestone, but it is full of mud, and there are many traces of cleaning up.

"This was cleared more than a hundred years ago, and every time that secret realm was opened, people who wanted to enter it worked for a few days. Du Lao looked at Fang Yi and the others and said with a smile: "But the people who used to work were all little guys, but no one dared to order you, an innate master." ”

"The predecessors planted trees and the later people enjoyed the shade, and it was nothing for me to clean up these places. ”

Fang Yi said lightly, he could see that there were not many places cleared out of this dungeon, and there were many collapsed houses along the road that were piled up with mud, and obviously they had not been excavated yet.

"I don't dare to work you. Du Lao shook his head, he used his hands to push the wheelchair, walking staggering on the not very flat ground, Fang Yi saw this and took two quick steps, and pushed his hands on the wheelchair.

"It's good to be young, I was as young as you back then. Feeling the power coming from behind him, Du Lao sighed softly, "When I entered this secret realm back then, I was about the same age as you are now. ”

"What, Old Du, have you been in that secret realm?"

Fang Yi's body shook when he heard this, and he looked at the white hair on the top of the old man's head in disbelief, since Du Lao and Song Tianyu and the others were of the same generation, he should be at least seventy or eighty years old, and the last time the secret realm was opened was twenty years ago, it stands to reason that Du Lao was already beyond the age required by the secret realm at that time.

"Not what you think. ”

Seemingly knowing what Fang Yi was thinking, Du Lao opened his mouth and said, "I entered more than fifty years ago, and in the past fifty years, the secret realm has been opened twice, and after I came out that time, I have stayed in this place and have never left. ”

Du Lao's voice became smaller and smaller, and there was an indescribable desolate feeling in the old voice, and the twilight of the white-haired hero made Fang Yi and the others who followed him feel a little heavy involuntarily.

"Old Du, your feet?" Bai Chuxia couldn't stand this heaviness, and asked at the moment, although the question asked was not very polite, but Bai Chuxia knew that the old man would not care about a girl with himself.

"Broken in the secret realm. ”

Du Lao didn't hide it, and said directly, "If it weren't for these feet, I wouldn't have stayed here, and if my feet were broken, I would have wasted it, so it's not interesting to go out, but it's better to guard this place." ”

"Huh, is it that dangerous in the secret realm?"

Hearing Du Lao's words, Wei Mingcheng and the others all changed their faces, especially Bai Chuxia, her heart suddenly beat a drum, she may not be afraid of death, but if she breaks off a pair of feet and can only rely on a wheelchair to walk in the future, Bai Chuxia doesn't know if she still has the courage to live.

"Of course, I broke a pair of feet, and I was lucky, but some of my partners didn't get out of it. Du Lao nodded, turned the wheelchair with his hand, turned his face at Wei Mingcheng and the others, and said, "Young man, do you still want to go in?"

"Of course you have to go in!"

Wei Mingcheng and the others said in unison, even Bai Chuxia did not hesitate, he had already come to this place, and there was absolutely no reason to retreat, they all understood that the emergence of a crisis was accompanied by an opportunity, and if they could find an opportunity in it, it would be equivalent to a step to the sky.

"Just don't regret it. Du Lao nodded and said, "I also asked this last time, some of the people who went in came out, and some stayed in forever, old man, I can only wish you good luck." ”

"Elder Du, what is it like in that secret realm?"

Wei Mingcheng couldn't help but ask, although he, Bai Chuxia and Si Yuanjie all have the Yang Returning Pill on their bodies, but this pill can save lives, but it may not be able to regenerate the severed limbs, and it is good to know some of the situation in advance now.

"I don't know!" What surprised Wei Mingcheng and the others was that Du Lao, who had always behaved very kindly, actually replied unusually simply if he didn't know these three words.

"Old ...... Du" Fang Yi also opened his mouth this time, he didn't expect to meet a person who had entered the secret realm here, so he naturally didn't want to lose this opportunity to explore the situation in the secret realm.

"I'm not lying to you, I don't know. ”

Du Lao shook his head with a wry smile and said: "The people who came out of the secret realm, all the memories of the situation in the secret realm have disappeared, I really don't know what happened in it, I don't even know how these feet were broken." ”

Du Lao sighed when he spoke, in fact, after he came out of the secret realm, he found that he had broken through to the innate realm.

But the spiritual power has broken through, but Du Lao's body has suffered a heavy blow, and he missed the best opportunity to break through the innate nature, and the true qi in his body has not been transformed into the innate true element, which is also the main reason why he has Bai Nian Gu Ash to stay here and become a guardian.

"Elder Du, can a cultivator enter that secret realm?" Fang Yi asked in a deep voice, Zhang Yi didn't know much about this secret realm before, many things were hearsay, in comparison, the old man in front of him knew more.

"Only for age, not for cultivation. Elder Du glanced at Fang Yi and said, "No cultivators under the age of thirty have come before, but it is speculated that as long as the age is met, cultivators can also enter, do you want to go in too?"

In the cultivator world, there is no such thing as seniority, the prevailing law there is that the strong are respected, so although Du Lao is forty or fifty years older than Fang Yi, he still needs to use honorifics when talking to Fang Yi.

"I'm going in!"

Fang Yi nodded, if this secret realm had no effect on cultivators, it meant that there was no danger, but on the other hand, if Fang Yi encountered danger inside, it also meant that this secret realm also had a chance for innate cultivators.

Wei Mingcheng and the others dared to break through their self and go into cultivation, Fang Yi would naturally not be timid, and unlike the secret realm in the Mayan Temple, which was very likely to be able to go past and not come back, this secret realm could be come out, and Fang Yi would not have to face the life and death parting with Bai Chuxia.

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