"How can there be such a big lake in the mountains? Or, are we fucking tired and hallucinating? The black bull asked, standing halfway up the mountain, wearing an eye patch.

The moisture on the surface of the lake was blown by the mountain breeze, and the cheeks were like clouds and mist, and they suddenly felt wet. This real feeling definitely does not come from abstract illusions.

I replied, "It is not uncommon for there to be a big lake in the mountains, Changbai Mountain Tianchi and Namco Lake, which are not surrounded by mountains, and the altitude is much higher than the big lake in front of us. What is unusual is that the surface of the lake is shrouded in a lot of fog, which is extremely thick and seems to have accumulated over time. ”

The shoreline of the lake on our side alone shows almost a straight line, which shows that the lake in front of us is amazingly large. If you throw off your legs and walk along the coast, I am afraid that it will take two or three days to get around to the other side, so that Gu Yixin's medical treatment will definitely be delayed. Between the two points, the straight line is the closest, and crossing the lake is undoubtedly a shortcut. However, the water surface is vast, and it is easy to get lost, and secondly, the old lake is deep, and I am afraid that there will be unknown creatures.

Just as the black bull and I were discussing the plan for moving forward, the white bear carried Gu Yixin straight to the shore of the lake below the mountain.

"How did you get there?" I asked Gao Moli tentatively.

He said lightly, "Go over." ”

Black Bull laughed when he heard this: "Little brother is wise, isn't it, no matter which path we choose, we have to rely on two legs." ”

Speechless, we followed the white bear down to the water's edge. The fog drifted on the shore, and the scene ten meters away was blurred, and there was not a trace of the moon reflected on the water.

The fog on the surface of the lake is mostly due to temperature differences. When the water surface temperature is greater than the air temperature above it, the water vapor evaporated from the water and the water vapor in the air condense into small water droplets, which gather into a fog with extremely low light transmittance.

The black bull asked worriedly: "In this case, no matter how you go, you have to get lost." Little brother, are you familiar with this film? You give me a word on which way to go. ”

Gao Moli walked to the waterfront near the cliff and groped for a while, and with a "bang" sound, the calm lake water suddenly rose, and an undercurrent gushed out of the water, splitting into two to the left and right. Under the mist-shrouded water, there seems to be a dragon intent on breaking through the water.

When the lake returned to calm, Gao Moli said: "This way." As he walked towards the lake, the white bear followed, and from a distance, it seemed to be flying across the vast water.

I looked at the black bull and followed with a full of doubts.

The lake water is not as cold and piercing as imagined, but some warm, this phenomenon is mostly related to geothermal heat, the geological structure of Heihu Mountain is complex, belongs to the Ebian fault zone, mainly composed of the skeleton of Xiaoliang Mountain and the fault block of Emei Mountain. It's not a volcanically active area, but it's rich in geothermal energy, and I suspect that there must be a deep cavern under this huge lake that emits heat into the water.

We followed Gao Moli to tread the water, at first the feet were full of stone and sand, walked more than ten meters, when the lake was waist-high, a wooden bridge suddenly appeared under the water, when the feet collapsed on the wooden bridge, I suddenly understood: there is a hidden bridge in this lake, usually the hidden bridge is deep underwater, only open the mechanism, it will rise to the current height.

The wooden bridge is entrenched half a meter deep and its width is no more than two meters, winding like a giant snake lurking underwater, leading to an unknown direction.

The black bull shone the water with a spotlight and said: "There is a dark path in feelings! No wonder the little brother doesn't look in a hurry. Lao Su, who did you say was full of food, build a wooden bridge underwater. ”

The lake is unfathomably deep, and building a wooden bridge is not an easy task, nor can it be completed overnight. I was surprised: "Not to mention the heavy workload, the material of this bridge is actually wood, and I am not afraid of being blistered after a long time." ”

"Maybe this wood isn't afraid of water!" The black bull said, took a deep breath, and plunged into the water.

After a while, he surfaced, holding a piece of black stuff in his hand, and said excitedly: "Old Su, look what this is!" This underwater bridge is all made of ebony! ”

I quickly took it and watched it, this piece of black wood was only as thick as my wrist, and it felt cold in my hand, it was dark and shiny, and the delicate wood texture was faintly visible under the spotlight. I've seen this kind of wood in the exhibition hall before, and it's really ebony!

Ebony is also known as gloomy wood, it is 2,000 to 40,000 years ago, the natural variation of the celestial bodies in the ancient Sichuan region, earthquakes, floods, mudslides will bury all the trees on the ground such as Nanmu, red toon, hemp willow, iron wood and so on into the low-lying places such as the ancient riverbed. Some of the trees buried in the silt are formed after thousands or even tens of thousands of years of carbonization process under the action of bacteria and other microorganisms under the action of bacteria and other microorganisms in the lack of oxygen and high pressure, so ebony is also known as "carbonized wood", which has the characteristics of being tough and abnormal, never fading, never decaying, and never giving birth to insects. It is perfect for underwater wooden bridges.

Ebony is more expensive than gold, and if this underwater bridge is made entirely of ebony, it is worth more than a golden bridge. However, the number of ebony trees that have been built on the hidden bridges is innumerable, so where did so much ebony come from? And who, and why did they go to great lengths to build such a priceless thousand-year-old bridge underwater?

My heart suddenly lit up: Could this underwater Wujin Bridge lead to the island in the middle of the lake where the descendants of the Dian people lived that Gao Moli said earlier?

"The bamboo basket may not be empty, and it is possible to fish out the ebony!" The black bull happily stuffed half of the ebony into the backpack tied into a burden, and dived into the waist-deep water again without saying a word, groping and pulling.

I wanted to call Gao Moli to ask clearly, only to find that when the black bull dived underwater to touch the ebony, he and the white bear had already walked away and disappeared into the endless smoke. The water in front of us was as calm as a mirror, leaving no trace of turbulent waves.

I lifted the black bull out of the water and said eagerly, "Don't miss a big deal for a small profit!" Gao Moli and the white bear are gone, we are thrown in the middle of the lake that is not next to each other in front of us, and we don't know where to go! ”

The black bull said disapprerovingly: "Of course, it's thirty-six plans to move forward!" There is a bridge under your feet, are you afraid that you will get lost? ”

The fog on the lake was steaming, the moonlight did not shine on the water at all, and there was no one to guide us, so we had to grope our way forward. I bent down against the surface of the water, using the spotlight to discern the direction of the underwater black bridge, for fear that I would fall to the bottom of the lake if I stepped into the air.

The fog thickened, and the line of sight continued to shrink, eventually becoming less than three or five meters. Suddenly, there was a faint sound of whimpering and hissing in the fog ahead. The voice was far away and empty, as if there was an ancient war horse, trapped on an isolated island in the middle of the lake, roaring and neighing, waiting for the owner to return at night.

The white bear flies across, and the black horse sings at night!

I felt like I was about to enter a mysterious and unknown world.