Just when there was a small episode between Da Liu and Xiao Liu, Gao Chao suddenly noticed that the water surface below the sand mountain where they were located, that is, in the middle of the sea, seemed to have changed again.

The three of them all looked down, and from this position, they could basically see the overall situation of this sea.

Under the sun, there were waves on the water, and then it was centered on a certain position on the side of Haizi, and the waves of the entire Haizi were around there.

Gao Chao noticed that it was perhaps because their location was high, so they would find that these waves were still regular, centered on that fixed position, and if they were on the water surface of Haizi, they would never find this.

At this moment, suddenly, the whole sea moved again, and it actually followed the previous route, moving farther to the northwest.

It was a little slow at first, but immediately, it was like a super fast train, and in the blink of an eye, it disappeared between the sand mountains and disappeared without a trace from their vision.

Da Liu and Xiao Liu both pointed their toes and looked at the distant Haizi until they couldn't see anything, Da Liu sighed and said, "Old Gao, Haizi has run away, what can we do now?" ”

He looked sideways at Gao Chao, but he was stunned for a moment, but he didn't expect that Gao Chao was not looking at the direction where Haizi was going, but was turning his back and looking at the location where Haizi was just now.

Xiao Liu was also stunned, and hurriedly looked down like Gao Chao, but he didn't know what Gao Chao was looking at, and couldn't help asking, "Old Gao, what are you looking at?" ”

Gao Chao suddenly said: "There, you remember that place for me!" ”

Then, Gao Chao raised his head and aimed his pistol, and suddenly pulled the trigger, and with a "bang", the bullet sent a puff of sand and dust on the sand below, and also made a small sand nest there.

"Do you see clearly?" Gao Chao said to the two people beside him.

Da Liu nodded: "Lao Gao, I can see it clearly, but there is ...... What kind of place is that? ”

Gao Chao said: "This is the place where all the waves on the water have just been around, and I suspect that it should be the place where it is connected to the dark river. ”

- The three men descended to the bottom of the sand mountain with great speed, and immediately found the place where Gao Chao had just hit with a pistol.

Gao Chao dug from the ground by hand, and Da Liu and Xiao Liu also hurried to help, and soon, they dug a big hole in the sand.

Unexpectedly, less than 50 centimeters after digging down, there was already water vapor in this big pit, and the surrounding sand seemed very wet.

Da Liu was surprised: "Good guy, it's really a water eye, it seems that this place is really a dark river." ”

Gao Chao nodded, and asked everyone to stop digging, and then he said: "The bottom of this place must be connected to the dark river, and the reason why Haizi can stop here is because of this water eye." ”

Xiao Liu looked at Gao Chao and said, "Old Gao, are we going to use this water eye?" ”

Da Liu was stunned and said, "But how to use this thing?" We're not short of water now, are we? ”

Gao Chao said: "We are not short of water, but we lack a path, and we need to enter the building from this path. ”

Da Liu and Xiao Liu glanced at each other.

Xiao Liu blinked his eyes and said with some surprise: "Old Gao, you don't want to enter the dark river from here, right?" ”

Gao Chao nodded and said, "That's all we have to do." ”

Da Liu was very excited when he heard this: "I'm grass, it's exciting enough, so how are we going to go down now?" ”

Unlike Da Liu, Xiao Liu said with some worry: "Lao Gao, is it really okay for us to go down the dark river?" It must be complicated. ”

Gao Chao thought for a while and said: "The situation must be very complicated, but I guess that there must be air in the dark river, that is to say, there must be room in the diameter of this dark river, and it is impossible to be completely filled with water, because if there is no air, the temperature difference between day and night may cause a sudden increase in the pressure in these pipe diameters, so it will cause an explosion, but you see, it is precisely because of these so-called water eyes that they can achieve decompression by releasing air, so that kind of thing will not happen in this desert. Isn't it? ”

Koyanagi nodded and said, "That makes sense, if that's the case, we can swim on the water, so we can find the side wall of that building?" ”

Gao Chao felt that Koyanagi reacted quickly, and said with a smile: "Yes, as long as we find the side wall, we should be able to blow it up with explosives, so that we can enter the interior of that building." ”

Da Liu had been listening to them all the time, and at this time he suddenly slapped his thigh: "Good idea, quick, let's do it now, I can't wait to go down to complete this mission." ”

Gao Chao said: "Don't worry, it's not so easy for us to go down to the dark river." ”

Da Liu scratched his head and said: "Yes, there is sand everywhere here, and we can't keep digging down, this water has already defended the sand to death, and it is difficult to dig it." ”

Gao Chao glanced at Xiao Yanagi and said, "Xiao Yanagi, it's up to you now, we have found the water eye, if you use explosives, can you blast out a hole?" ”

Xiao Yanagi didn't speak, but squatted down on the ground and dug twice with his hands, and then said: "I'm not sure about this, it seems that it doesn't work now, these sand particles are still too fine, if we want to blast successfully, we must at least dig some sand close to the gravel careless, that kind of sand means that it is close to the rock, that is, the top surface of the underground river, only then, I will grasp it again to blow out a hole." ”

When Da Liu heard him say this, he immediately rolled up his arms and sleeves and said, "I'll come, I promise to satisfy you in the fastest time." ”

——The sun is scorching, but Da Liu is like a tireless excavator under this sun, constantly digging those wet sands.

Soon, he had already dug down a distance of about two meters, Gao Chao and Xiao Liu were next to the hole, constantly patting the cave wall and placing collapsed holes, while Da Liu was still digging with the sapper shovel in the bag.

Suddenly, Xiao Liu glanced at the sand dug out by Da Liu, and said happily: "Don't dig it, I think it's okay." ”

Da Liu straightened up, wiped the beads of sweat on his forehead and said, "I'm grass, I'm tired, I found this thing more tiring than a fifty-kilometer cross-country run." ”

The crowd laughed.

——In the quiet desert, the sun has gradually set in the west, in this tranquility, suddenly, there is a loud "boom", and then the sand and dust are all over the sky, rolling up dozens of meters high, but then it is quiet again, only the rolled up sand and dust slowly falls, as if nothing happened.

I don't know how long it took, but from the back of the sand hill next to the blasting site, three people slowly walked out.

These three people are undoubtedly superb, as well as the warriors Da Liu and Xiao Yanagi.

The three of them all looked a little excited, and when they came to the blasting site, suddenly, Da Liu couldn't help but shout.

"Xiaoyanagi, it's really yours, this hole is perfectly opened." Da Liu was so happy that he almost jumped.

Xiao Liu said modestly: "This is nothing, the main thing is that Lao Gao's position is accurate, otherwise how could it be directly blown up to the top of the dark river?" ”

Gao Chao had already lay on the ground and looked at the bottom of the hole, and sure enough, when he looked into the dark depths with his flashlight, he found that there was a sparkling feeling, and not only that, but there was always damp and cold air spurting out of the hole, and the sound of rushing water could be faintly heard.

"This is it." Gao Chao also seemed excited.

Immediately, Gao Chao asked Da Liu to fix a rope on the ground, about twenty meters long, Gao Chao estimated that this length was enough, and then went down the rope to the black hole.

The size of the hole is okay, about 1.5 meters in diameter, and then it was ready, Gao Chao glanced at Da Liu and Xiao Liu, and said excitedly: "Comrades, from the moment we walked out of the underground bunker of the army, we have embarked on a difficult road, our comrades-in-arms have fallen beside us, but we still have to move forward, for the sake of our families, and for our motherland, we must complete this mission." ”

Da Liu and Xiao Liu both nodded and shouted together: "Swear to complete the task!" ”

- Darkness, and dampness, make people feel even more indifferent.

As soon as he entered the dark cavern, Gao Chao felt a chill.

He hung on the rope and shone his flashlight around, and he could not help but be surprised that this place was much bigger than he had imagined, because this dark river looked so large that it looked like a real river on the ground.

The amount of water was indeed very large, and it was clear, and the speed of the water was okay, and Gao Chao noticed that the distance between him and the surface of the water was actually not that high, only about ten meters away, so he slowly entered the water for the first time.

"It's cold." Gao Chao didn't expect that the water temperature of this dark river was really in stark contrast to the desert above.

He estimated the temperature of the water, which was about five or six degrees, which made him feel a little difficult, because of this temperature, each of them had to overcome the damage that the low temperature might bring to them.

You know, if a person's body temperature drops by 1 degree Celsius, it means that death is not far away.

So Gao Chao had to shout at Da Liu and Xiao Liu, who had just entered the water: "Quick, swim up, we want to swim east!" ”

Da Liu and Xiao Liu are actually not worried about hypothermia, because they both have large backpacks on their bodies, and these backpacks are pressed on their bodies, which is equivalent to allowing them to train armed swimming.

However, these two people are also veterans, and their method is also quite interesting, that is, after entering the water, they keep slapping their clothes, and after a while, their clothes are filled with air, so they have some extra buoyancy in the icy river water, which can save them a lot of effort.

Gao Chao also knew this method, but in order to make himself less cold, he had to swim more flexibly, especially the leg he was worried about his injury, because the blood flow after the fracture was not so fast, and now he encountered cold water, which could easily cause his leg to be frostbitten.

Fortunately, none of the three of them were inexperienced soldiers, so under Gao Chao's leadership, they quickly swam towards the east bank of the predetermined dark river.

When Gao Chao finally stepped on the rocky beach on the shore, this hanging heart finally fell, and then he took off all his clothes as fast as he could, Da Liu and Xiao Liu also followed, also took off their clothes, and then lit two kerosene stoves as fast as possible, what they had to do was to warm themselves up immediately, this problem was too critical, otherwise they might lose their consciousness due to hypothermia.

Gao Chao was grinding his hands on the skin and looking around, hoping to see some kind of ancient building on the east side, because only then could they rely on the blast to make a hole again.

But to his disappointment, at the end of the east side of the rocky beach, there was nothing more than a black, cold rock, which seemed to glow with a cold light from this angle.

Da Liu is also observing the surroundings, but he still seems to be a little jealous of the dark river, so he has been looking at the water flow in the dark river in a daze, he feels that this place is too cold, although he is the biggest, but his courage does not seem to be the biggest, at least, he has been thinking about the things that happened to Xiao Wang.

So he couldn't help but feel that something seemed to be staring at him all the time in that dark river, or that he seemed to see the black smoke on the surface of the river.

Xiao Liu was more concerned about Gao Chao's concern, he glanced at the stone wall over there, and then sighed and said, "Old Gao, these stone walls don't look like they are artificially carved, right?" ”

Gao Chao nodded and said: "Yes, these are obviously eroded by flowing water, they are very smooth and can reflect light, but ......"

Koyanagi couldn't help but say, "But what? Old high. ”

Gao Chao said: "But have you noticed that the color of these rocks is black. ”

Koyanagi also frowned: "Yes, it's indeed black, if you want to talk about it, if the black rock appears here, then there should be fine sand formed by the black weathered rock above, but the sand here is all golden yellow, which is a bit illogical." ”

Gao Chao looked at Xiaoyanagi and said with some surprise: "Hey, Xiaoyanagi, you seem to know a lot about rocks." ”

Xiao Liu smiled and said: "Lao Gao, don't forget, I am an expert in blasting, the most important thing in blasting is to study stones, if I don't understand stones, then how can I blow them up?" ”

Gao Chao nodded: "Yes, that's right, that's like you said, it's completely illogical, but...... Do you have any reasonable assumptions? ”

Xiao Yanagi thought for a while, and suddenly said with some excitement: "Brother Gao, if you let me hypothesize, then I'll be bold, okay?" ”

Gao Chao smiled: "Please speak." ”

Xiaoyanagi said: "Brother Gao, I think there is only one situation that may fit this logic, and that is ......"

Xiao Liu was about to say something, but Da Liu, who had never participated in the discussion on the side, suddenly shouted.

"Quick...... Look, there's something on the river...... Something is swimming over! ”