The sound of the subwoofer-like rumbling water made me timid, and I admit that at that moment, I was really scared, holding on to a stone pillar next to me, and I didn't dare to take half a step, the water roared and rushed down, and all I could do was pray in my heart.

As the minutes ticked by, the turbulent water made it impossible for me to stand in the water, and I looked at the abyss less than three meters in front of me, and my heart became more and more panicked.

The pillar was completely submerged in the current, and I had reached my limit, and just as my hand was about to slide off the pillar, I saw a point of light appear in front of me, and the white light under the water was unusually obvious, it was moving, and it was moving in my direction.

Zhang Yang came out of the water at the same time threw out the soft steel wire, firmly fixed on the stone pillar, and at that moment, my hand slipped off the stone pillar, the whole person instantly lost the center of gravity, and was pulled by Zhang Yang on the way to drift down the water, the two people struggled in the water for nearly three or four minutes, and finally gradually stabilized themselves because of the weakening of the current.

The exhausted two people hugged the stone pillar tightly like monkeys, the water flow gradually returned to stability, and the water level had reached the highest height, only to find that at this moment, the stone bridge called the Jade Belt Bridge really appeared in the water, not suspended in the air as just now.

I touched the water on my face and carefully observed the situation around me, and at this moment, the abyss had been completely filled by the water, forming a mirrored lake, and the jade belt bridge was erected on the lake.

Zhang Yang prostrations hugged the stone pillar, thinking that he had also experienced a thrilling experience, I wanted to speak, but seeing him with his eyes closed and a tired face, the words came to his mouth or swallowed, and the cave gradually quieted down, I knew that we were not in danger for the time being at this moment, so I was quite relieved to rest and relax.

About ten minutes or so, Zhang Yang suddenly opened his eyes, although his mental state was not very good, but compared to the recovery just now, it was very good, at least his eyes returned to the confidence they had before.

"Have you rested enough?" Zhang Yang looked at his watch.

I also took a look at the watch, this kind of watch is still the equipment that Jiang Yuan gave me when we went to Yunnan, and it is dedicated to underwater.

"I'm fine, how are you?" I asked.

Zhang Yang rubbed his left shoulder, frowned slightly, and said simply, "It's okay." ”

After speaking, he looked up at the location of the Yudai Bridge in front of him, and said: "It's past twelve o'clock now, and the water level will continue to drop, we must cross the bridge before the water level drops under the bridge, hurry up, follow me." ”

Although I didn't understand the relationship between the stone bridge and the water, I still did it, and the two of us prepared again, and then dived one after the other, because the water level began to drop, and the water formed a backflow underwater, so our activities in the water were more difficult, after all, we were going against the current.

The distance was more than three meters, but due to the underwater countercurrent and whirlpools, we still had a lot of effort, but we still swam smoothly under the jade belt bridge, Zhang Yang stopped me, and he took out a semi-circular metal object from his pocket, this thing has a strange shape, there are zigzag grooves at the edges, and the regularity is obvious, which is intentional.

Zhang Yang relied on his long-term underwater breath-holding advantage, with this piece of metal to swim to the middle of the jade belt bridge, underwater, because I couldn't hold my breath, I took the opportunity to float to the surface of the water to breathe, just at the moment when I breathed, Zhang Yang should have opened the mechanism underwater, and some faint black liquid suddenly appeared on the originally smooth white jade surface of the jade belt bridge, and these mucus attached to the white jade surface and gradually solidified.

Zhang Yang emerged from under the water and gestured to cross the bridge.

I cautiously climbed onto the bridge, due to staying in the cold water for too long, my feet have been numb, tried several times can not stand on my heels, Zhang Yang floated up to support the railing of the jade belt bridge a beautiful flip on the jade belt bridge, the moment he landed, the soft steel wire has also been sent to me, I grabbed it with the help of his strength to climb the jade belt bridge.

When I stood in the middle of the bridge, I suddenly realized that the mechanism on the bridge was the black solids under my feet.

According to Zhang Yang, the white jade of this jade belt bridge is actually a rare ore from the snow-capped mountains, and the biggest feature of this ore is that it has the most ordinary appearance and zero friction.

From a physical point of view, that is to say, this rare ore has a smooth surface without any adhesion, and any object that comes into contact with it will not produce any friction.

The spilled black liquid seems to have been secretly made from some kind of ore underground, because it was once in the mezzanine of the stone bridge, once the mechanism is activated, these liquids will overflow from the gaps reserved by the stone slab of the jade belt bridge, and instantly solidify after contact with the air, forming a protective layer.

The Jade Belt Bridge doesn't look very long, but in fact, when we walked over, I realized that it was not worse than the seventeen-hole bridge in the Summer Palace, and I began to understand the weirdness of this hole, that is, the visual distortion.

After crossing the Yudai Bridge, the place where you stand is the legendary Luoyun Cave, but this is the back of the Luoyun Cave, and the biggest risk of entering from here is to pass through the so-called Ghost Head Pit.

The cave is really full of fog, although the faint mist will not form a situation where there is no light for one meter, but it still causes us a lot of trouble in this kind of cave.

Our backpacks are professional waterproof function, although the time in the water is very long, ready is only a little water, for the equipment and instruments inside did not have much impact, I turned out an orange-red mining lamp, after opening the faint orange light source to give me a kind of warmth.

Zhang Yang also turned on a miner's lamp, but his miner's lamp was indeed a faint green, and it was impossible to see it if you didn't look closely, and after walking in the cave for a few minutes, the first fork in the road appeared in front of us.

The road is divided into left and right, and there is a stone plate at each fork, the stone plate is engraved with a circle of words, this kind of rune is the long-lost Xia Wen, it is the same as the Huangquan ciphertext, it is used for military transmission, because there are too many secrets, so, it was lost very early.

Although I recognized it as Xia Wen, I couldn't translate it, I just judged by looking at the picture and speaking that the words on these two stone plates should be an explanation of these two passages, but the tragedy is that we don't know the meaning of the words, so how to choose, left or right?