Ji Yuan also nodded: "Indeed, this is absolutely impossible, in the plain materials recorded in Jingyuan Lake in my country, the depth of Jingyuan Lake is only within sixty meters, not this kind of inverted cone, and the depth is more than four hundred meters. ”

Although the academic discourse they spoke was not clear to a few people, and they did not understand the depth of the lake and the impact of its shape on Jingyuan Lake, they knew that the peculiar topography of Jingyuan Lake had invisibly added a lot of pressure and difficulties to the tasks they had to do next.

"I suspect that it may be the relationship between the underground dark river, the upper waterfall is continuous all year round, so the accumulated water pressure is also constantly superimposed around Jingyuan Lake, and because of the unique topography here, the pressure of this pressure on the four outer periphery will be completely piled up at the bottom of Jingyuan Lake in another way, and maybe there is also the flow of the underground dark river, so the soil layer between the two will be broken through, forming the current inverted cone." Ji Yuan added on the side.

Gu Nagasaki pondered for a while and guessed: "Could it be that the Jiaolong has been living in the underground dark river before, and only swam from the underground dark river to the upper part after the soil layer was broken?" ”

Luo Ka thought for a while and replied: "There is also this possibility, judging from the data transmitted by the scanner, there is indeed a cave here, which is at the foot of Julong Mountain, forty meters below the surface of Jingyuan Lake, and Jiaolong entered and exited from there. ”

Ye Liqi's expression moved, but he thought of another possibility, but he didn't say it.

Gu Nagasaki nodded slightly, his expression was calm, and he couldn't tell what he was thinking.

"It's ten o'clock, let's get ready, first explore the situation here, and then organize a battle plan, and prepare to launch tomorrow." Gu Nagasaki commanded.

Everyone obeyed the order, and Ji Yuan took the scanner in the air, turned off the system and put it in the box next to him, and then took out a small mechanical swimming fish.

"This is the latest underwater miniature detector developed by the Institute of Abnormal Abilities, which can shoot videos within 100 meters of the water." Ji Yuan said to everyone.

At first glance, it looks no different from ordinary grass carp, but if you look closely, you can see that the silver scales on it are actually made of alloy, but the pieces of alloy fish scales are very vivid, beautiful and beautiful, like real fish scales, and even the shallow lines on it are depicted in detail.

Ji Yuan handed the grass carp to Loka, Loka took it, pinched the abdomen of the grass carp with his right hand, and as Ji Yuan turned on the switch, the grass carp also began to swim, the pelvic fin moved and moved, constantly expanding and contracting, the tail fanned slightly, the speed was not fast, sometimes to the left and sometimes to the right.

At the same time, the receiver on the ground also began to operate, the green ripple map line on it floated little by little, and a video of the grass carp appeared on the tablet in their hands.

"The eyes of the grass carp have been modified, and there are two pinhole cameras inside, infrared, but infrared light spots cannot be seen without electronic equipment." Ji Yuan explained.

Took the mechanical grass carp from Luo Ka's hand, Ji Yuan threw it directly into the lake below, with its manipulation next to it, the grass carp also swam in a circle in the lake, in fact, if you didn't know in advance that this was a mechanical fake fish, then you think it might really be a fresh fish, but after knowing the real situation, you will find that its stiff movements seem to be all simulated by computers.

"Fortunately, the water of Jingyuan Lake is relatively flat, and there are not too many undercurrents and whirlpools in it, if it is in the sea, this thing will not work." Ji Yuan said with some pity.

The grass carp couldn't swim directly into the Jiaolong Cave, and they didn't know if the Jiaolong would recognize the fish as fake, so Ji Yuan manipulated the grass carp to swim in the lake for a while, which was contaminated with that kind of fishy smell.

The others set up inflatable tents on the flat terrain behind them, lit the fire, and set it up properly, and the rest was up to the grass carp.

They all gathered in Gu Nagasaki's tent and came out to do tasks, naturally everything was based on simplicity and convenience, so there were only two tents in total, Ye Liqi and Wei Qi used one for the five of them, and Gu Nagasaki used one for the six of them.

As the grass carp went deeper into the lake step by step, the picture of the video began to darken, but because it was an infrared camera, even in the dark water, the video was pale green.

The grass carp began to look for the cave.

The water is not very clear, so the video sent back is only visible from three to ten meters, some small fish, only close to the front of the grass carp can be seen, of course, those large rocks and reefs are also faintly shadowed.

"Because the picture captured by the underwater camera is not very clear, a miniature detector is also installed on the grass carp, and the underlying environment can be roughly scanned through the position of the fishing line on both sides." Ji Yuan said.

On the laptop next to him was a green three-dimensional model, which was the underwater terrain that had been roughly measured with the scanner before.

By setting the overlapping position, it is easy to confirm the current position of the grass carp on the existing 3D model.

Gu Nagasaki glanced at Luo Ka with appreciation.

"Found a place." Ji Yuan said.

Then everyone saw that the grass carp in the notebook began to approach the location of the underwater cave during the day, and the video uploaded back from the tablet became narrower little by little.

However, because of this, I can see this underwater cave tunnel more clearly.

The general appearance of the tunnel is a cylinder with a diameter of about three meters, and there are not many bends in it, almost straight into the belly of the mountain, and the grass carp swims very slowly, so you can see the stone walls up and down the tunnel clearly.

The surface of the stone wall is a little uneven, almost all of which are small gravel ballast, but if you want to say that this is a hand-dug trace, it is very similar.

As the grass carp swam in little by little, Luo Ka next to him was also calculating the length of the tunnel, according to the speed of the grass carp and the time it took to enter the tunnel, and it was easy to see the end of the tunnel in front of it, and the tunnel was about 20 meters long.

As the grass carp swam out of the tunnel little by little, everyone's hearts also tightened at that moment.

On the computer, in a green picture, the black clumps in the distance were also more conspicuous, but Gu Nagasaki suddenly grabbed Ji Yuan's clothes: "Don't go over yet, go up, don't attract their attention." ”

Ji Yuan responded, staring at the screen without blinking, manipulating the steering buttons in his hands with both hands, and the grass carp began to swim forward little by little, deflecting some directions from time to time, as if swimming in it without a purpose.

Out of caution, Yoshimoto turned off the detector on the fish as soon as he entered the tunnel, and only used the two pinhole cameras in the fish's eyes to see everything here.

The grass carp approached the stone wall on the left little by little, and the yellow rock wall clearly appeared in front of everyone's eyes, and they could even see the black ash mixed impurities in the rock.

Gu Nagasaki's original intention was to keep the grass carp as far away from the dragons below as possible, but just as the grass carp left the stone wall a little and was about to swim up, they saw a black tail in the picture.

No, it shouldn't be black, it's just very dark in the green picture.

Ji Yuan was stunned for a moment, the grass carp swam in place, and he asked, "What should I do, do you want to go and see, that thing seems to be lying on top of something." ”

Gu Nagasaki thought for a moment and said, "Be careful to go over and take a look." ”

Ji Yuan responded, controlling the grass carp to move away from the tail a little bit, but he drew an arc far away and swam over from the other side, and just when the grass carp wanted to swim down again, a big black head suddenly appeared in the picture.

The terrifying big snake head startled everyone, and Ji Yuan's hands trembled, and the grass carp turned around and went downstream.

"What was that?" Ding Mai on the side asked with palpitations.

"It's Jiaolong." Ye Liqi replied.

Ding Mai glanced at Ye Liqi suspiciously, and Ye Liqi said: "I saw it up close the last time I did the mission, and the head of the dragon grew like a snake's head. ”

"Take a turn around and see what's on it." Gu Nagasaki ignored a few people, and suddenly gave a strange order.

Ji Yuan controlled the grass carp to get closer to the side stone wall little by little, and then slowly moved upward, and not long after, in the picture, he saw the big tail just now, but this time the tail was no longer hanging down, but flat on the stone platform under it.

This time, the grass carp didn't dare to get too close to it, so it swam slightly against the stone wall for a while, but in the next moment, the green picture disappeared abruptly, and the grass carp actually swam out of the water.

Ji Yuan hurriedly controlled the grass carp to descend slightly, clinging to a thin layer of water, looking ahead.

Although there is only a limited space that can be seen by the underwater pinhole camera, only a thin layer of water is separated, and from the eyes of the grass carp, a green light cluster on the water surface can be seen.

"Get out of the water and take a closer look." Gu Nagasaki straightened up, stared at the screen, and whispered.

The grass carp floated upwards little by little, and only a pair of black eyes appeared on the water, but everyone saw a shocking scene in the picture.

It was a palace in the mountains, and in the center of the palace was a green gem suspended in the air, and the gem swirled slightly in the air, shooting green light in all directions, and just below the gem, a dragon with a pitch-black body and a swollen head was raising its head high, and its four paws were propped up on the stone platform below, looking up at the gem in the air in worship.

The grass carp didn't dare to show too many movements, and only moved the angle slightly on the water surface, but saw the dragon suddenly turn around and look in its direction.