This time into the water, he really saw her "other side", into the water she closed her eyes, the eyelids instantly became a transparent concave and convex mirror, as if the eyes were covered with a layer of protective glasses, the shark fins on the back, the fluorescent blue light emitted by the body, illuminated the originally dim lake water as clear as day.

The more he saw it, the more shocked he was at her true side, and he thought he would always be amazed by this "creature".

The entrance to the cave was in front of them, and the water seemed to be flowing in the direction of the opening, and as they entered the opening, they found that it seemed to be a tunnel. The cave that didn't seem to be deep made them swim for a long time. She was right in front of his eyes, as comfortable and nimble as a fish in water, and she pulled him all the way to the depths of the cave.

He didn't know why he once felt the dizziness in the spring water of the mountain, and when he seemed to be running out of oxygen when he was about to reach his body's limit, he was pushed by her, and suddenly his head was exposed to the water.

The air finally entered his mouth and nose, and he gasped for breath and climbed onto the shore.

Showing the glittering scales on her body, she took out a shawl from her waterproof backpack and draped it over her body: "We're finally in!" The shawl covered the illuminated scales on her body, and she took the lamp out of her backpack and lit up the entire cave.

Although he was able to breathe, he still had an inexplicable feeling of dizziness, and he had been feeling unwell since he entered the water.

At this time, he did not have time to worry about his discomfort, and forced his spirits to carefully observe the center of this cave:

"Where does this lead? How can there be no water here? "In the center of this cave is the core of this hill, which seems to be hollow.

It turned out that the entrance of the cave was really a hidden tunnel. It's just that the tunnel has never been discovered: "I think the people who came here before entered the cave because it was dark and they walked in a straight line. No one paid attention to the fact that the top of the cave was actually the heart of the cave. ”

The entrance to the cave, which was originally exposed to the ground, created a blind spot for those who walked into the hole. After several days of heavy rain, the entrance of the cave sank to the surface, and the water of the lake rose to the center of the cave about 6 meters high as the water level rose. And because of the high water level, they have been swimming upstream, and they have been swimming to the center of this cave.

"Humans get lost underwater, but I don't, the cave we just passed through is actually going up, and in the narrow tunnel you may not feel that we are actually going upstream. That is to say that now we are inside this mountain, and this mountain is empty! ”

If it weren't for the heavy rain in the past few days, they wouldn't have noticed that there was a cave here.

"This cave seems to have been formed by the erosion of perennial water. Nothing special! He looked around, but he didn't see anything special about this cave, and at a glance it was a natural cave.

"Nope! From the moment we entered the tunnel to the cave, I noticed the wall. It is not a natural formation, although the walls of this tunnel may seem irregular after years of rain, but with my years of archaeological experience, the water patterns on the walls of this cave have been formed in less than 100 years! Her hand kept groping around the wall.

Factitious? Someone built one such tunnel here a hundred years ago? What exactly is their purpose?

Her words caught his attention, but he was so dizzy that he stumbled and sat down on a stone wall behind him.

"What's wrong with you? You okay? She immediately noticed his discomfort and looked at him with concern.

"I don't know if I'm dying, maybe the pressure of the dive just now was compressing my brain tumor. Dizzy all the time." Not only was he dizzy at this time, but the face of an alien creature in front of him was like an alien creature, which made him even more uncomfortable.

She seemed to see his "uncomfortable" look. She took out a fairly dry towel from her bag and wiped it on her face for a while, restoring her human face that was not much different from his.

"You're all dizzy like this, and you still have time to be jealous of my beauty?" She helped him up, and didn't forget to say the opposite.

"Haha, I'm jealous." He should follow her to his feet, but she inadvertently looked back at the pattern of unnatural forces on the stone wall behind him.

"Look! What is this pattern, is it the sun? She abruptly let him go. Excitedly touching the stone wall.

"You ....." He was momentarily dizzy by her uncertain move, and followed her hand to look over.

It may have been the sign of the sun, but it seemed to him to be just a circle. But the round shape is extremely regular, and it feels like it is not natural. It is carved in the center of the cave, which seems to indicate some kind of meaning in this pattern.

"I'll just say that this hole is not natural, and looking at the pattern proves that someone has come in before!" She chattered excitedly, confirming her suspicions.

At this time, Hua Ge felt that in the humid air, it seemed that an invisible air flow was above, and he looked up: "Look! Above"

Looking in the direction he was pointing, there was a very strange sight, about a few meters above their heads, a large lake floating in the air, forming a lake in the air. At this point, she turned off the flashlight. Only then did she realize that the cave was not as dark as she had imagined.

The lake overhead reflected a faint amount of sunlight. And under the glimmer of light, they could clearly see that there were still some plankton and small fish swimming in the air lake in the water. Just like in the air, the completely gravity-defying landscape and the lake around them mirrored each other, and the refracted circles of light hit the surrounding walls one by one.

Such a spectacle is very beautiful, refreshing, but also incredible.

Hua Ge immediately recognized that the water above his head seemed to be the hot spring he had been to in the mountains before. "How is this possible? Is that the hot spring? "But it doesn't look like the hot spring. How can there be small fish in the hot springs?!

"Sure enough, as I guessed, what we have on our heads is the small lake that you mistook for a hot spring before..."

"There's something strange here, it seems to have some kind of sonic device......" she kept checking every corner of the place. Hua Ge seemed to be attracted by this scene for a moment, and muttered, "What sonic device?" “

She grabbed him and shook his body: "Wake up! Don't look at it! You're still worried about your brain tumor! We've got to find that device, or your brain tumor will burst at any moment! “

He looked a little confused: "I don't understand what you mean. “

"Didn't you faint when you jumped into that spring before? And this time you came here with such a confused mind, all because of the interference of the sonic device! She explained eagerly.

"The reason why water can float in the air like magic is that sound waves vibrate, and when sound waves exhibit a nonlinear effect, when the sound waves exert pressure on a substance in a certain direction, it produces acoustic radiation forces......"

He couldn't understand what she was saying, "I don't understand what you mean." ”

She was a little anxious, she knew that he was not as stupid as she thought, and the sound radiation here seemed to have a great effect on his brain, and she tried to say to him in a simple way: "I am in the water, like a shark, I communicate by sound waves." I didn't notice anything strange here before, because when I was in the water, I thought the sound waves were coming from the creatures in the water. And when I go ashore, my body automatically blocks out the interference of sound waves. “

"The reason why water floats in the air is because the radiating force of sound waves causes this stagnant water to float in the air. And your human physiology is different from mine, and the blood in your brain is abnormally compressed by the sound waves here. Can cause your brain tumor to rupture! “

He seemed to understand at this time, but he was also relaxed: "You mean you can also make the water float?" “

"If I switch to the sound wave pronunciation mode, I can make the little droplets float, like this......" She opened her mouth and didn't seem to make any sound that the human ear could hear.

But at this time, countless water droplets floated around them, surrounding them as if time had frozen: "Wow! What a magic trick! You're amazing, you seem to have special abilities! He grinned and clapped his hands.

And at this time, she realized that the man seemed to be a little mentally discouraged under the influence of the sound waves. He didn't seem to be able to think like a normal person at this time.

She gritted her teeth and peeled off a scale from her body, putting it in his mouth for him to swallow. And the blue blood she had left behind at this time floated sporadically. But her wounds healed quickly.

He finally seemed to be able to slowly come to his senses....his brain was not as dizzy as it was then..... he was just about to thank her for her "first aid"....

At this time, an old and familiar voice behind the two of them floated out from behind the cave wall: "What you are doing for him now is temporary, and he will still die." Your blood should not be wasted on him. I can turn off the sonic device. Give you a chance to save his life, but you must promise me one condition. ”

He was held by her and looked at the source of the voice...... How so? It's him? Isn't he dead?!