Using the chimney climbing method to climb the cliff smoothly, I put Lu Nuonuo and Chen Xiyu on the ground, and then looked around at the surrounding scene, on my right side is a huge wind erosion wall, this wall is not a straight up and down cliff, but a groove like a moon recessed in, inside the groove, there is this serious wind erosion phenomenon, the yin wind is hitting the wall and blowing into the mountain cracks. Pen @ fun @ pavilion wWw. ｂｉｑUｇE。 ｉｎｆｏ

The surrounding environment is very complicated, there are wind erosion forests everywhere, these stones are all blown by the underground gang wind and have strange shapes, they look like strange stone people, and there are some wind moving stones above the stone forest, which gives people a very unreliable feeling.

The majesty of this stone forest reminds me of the famous stone forest scenic area in Yunnan, where the stone forest was formed 270 million years ago and is the essence of the world's karst landforms, with the world's longest history of karst landform evolution, the most extensive distribution area, complete types, and unique forms of Paleozoic karst landform communities.

When I was in college, I heard from one of my college classmates that their stone forest is very famous, and the landform in it not only includes stone teeth, peaks, karst hills, karst caves, dissolution lakes, waterfalls, underground rivers, and even giant gastropod fossils, coral fossils and other marine fossils, recording the vibrant underwater world in the stone forest area 270 million years ago.

I wasn't very interested in these geological landscapes at the time, but I was very interested in a strange wind cave that my college classmates had talked about.

According to my classmate, when the wind blows in the Strange Wind Cave, the quiet earth suddenly becomes dusty and howling, accompanied by the rumbling sound of running water, as if a flood may emerge in the cave at any time, and you can fix your eyes and peep, but you can't see a drop of water.

When the wind volume is large, make people have to be in the wind, there is a sense that the rainstorm is coming, some people pull some hay and firewood branches on the spot, put them in front of the hole and light them, only to see the wind blowing out of the hole to blow the smoke of the fire into the sky and fly, it is two or three meters high, after lasting two minutes, the fire gradually weakens, after pausing for more than ten minutes, the smoke of the fire at the entrance of the cave is suddenly swallowed into the hole, so that there is no dome and one blow, one breathe, the cycle repeats, so that there is no dome, like a clever magician playing the trick of breathing fire at the seven orifices.

At that time, I was very puzzled by this phenomenon, so I looked up the information about the Qifeng Cave on the Internet, and according to experts, the strange geology of the Qifeng Cave is composed of three parts: the intermittent wind spray tunnel, the siphon spring, and the dark river.

The intermittent wind spray tunnel is on the edge of the stone forest in the middle of the hillside, there is a stream more than ten meters long at the foot of the mountain, the stream water is exposed from the underground river, flows more than ten meters and then enters the dark river, flows through the dark river several meters long and falls into the siphon spring.

The siphon spring is formed by the dissolution of uneven limestone, and the outer hole is narrow, but the interior has a large space in the shape of a gourd.

The siphon spring is connected with the intermittent wind spray tunnel in the underground cavity, therefore, when the water flows to the gourd mouth is blocked, the pressure generated by the increase of the water flow forces the water to squeeze quickly into the gourd, and the falling water squeezes out the air in the gourd belly from the underground cavity from the intermittent wind spray tunnel mouth, produces the air spray phenomenon, after the water flows away, the gourd mouth is blocked again, the air pressure in the gourd belly is not equal to the outside, and the physical action makes the air backfill from the wind spray tunnel mouth, and forms the suction phenomenon.

At first, I thought that the underground winds here might actually lead to the depths of hell, but now it seems that the underground windwinds are most likely due to the intermittent wind vents, siphon springs, and dark rivers that also exist here.

I even made another hypothesis, which is that the formation of this underground stone forest is likely to be formed at the same time as the formation of the Yunnan stone forest 270 million years ago.

However, since the wind here is so strong and lasts for so long, if the underground wind here is really caused by the combined action of the underground river and the siphon spring, as I imagined, then how strong does the underground river need to be?

And how big is the interior space of an intermittent blast tunnel?

After placing Lu Nuonuo and Chen Xiyu in the stone forest, I began to look for water sources nearby, and as long as there was water, human life could be extended from seven days to 21 days.

The two of them are too weak now, even if they drink some water, I am afraid they will be able to recover a lot.

I groped my way along the place I had just come from, and in front of a forest of towering stone pillars, I found a small puddle of water, which did not contain much water, but it was better than living water, and the spring water gushed out from under the stone pillars without delay, forming three puddles the size of tires on the ground.

I walked to the puddle and found that there were a lot of fish in the water, and there were a lot of mushrooms growing around the puddle, some of which had dried up and turned into a large number of dried mushrooms, I was ecstatic, I didn't know many types of mushrooms, but I learned this mushroom in the wilderness survival class of the 374 General Bureau.

This is a mushroom similar to a fire-initiating mushroom, to be precise, it belongs to the family Polyporeaceae, with a variety of shapes, flat, capped, sessile or sessile, annual or perennial, fleshy, leathery, cork or woody. The inside of this fungus is quite soft and dry, and as long as you take out the dried mycelium under the umbrella cover and knead it into a toilet paper-like fluffy substance, it can be fully burned.

I was so ecstatic that I immediately picked a hard rod on the ground and cut it down, and then tested the hardness and found a drill pipe that could be used as a fire, and with these ignition bacteria, I planned to use the Iroquois method of ignition.

The laces are removed from the shoe, and then one end of the drill shaft is fastened to a piece of dry ignition fungus with two ropes and the other end of the rope. The drill site uses a hard spore shell of the ignition fungus as an accelerator.

Finally, two hands grabbed the ends of the laces and began to pull quickly.

This was the first time I had used the survival skills I had learned at the 374 General Bureau in the wild, and it took me more than an hour to ignite the fire.

I hurriedly found a few stones, heated them in the fire, and then dug a pit in the ground with a knife to bring the spring water into the pit, and then made a drainage channel at the other end to wash away the dirt and gravel by the flow of water.

When I had done all this, I plugged the drain, and when the inlet was full, I threw a few palm-sized fish from the stream into the pool, and then got the red-hot stones out and threw them into the puddle to serve as heaters.

The stone quickly boiled the water, and I helped Lu Nuonuo and Chen Xiyu to dip a sleeve in the fish soup, and squeezed it into their mouths little by little.

After drinking some nutritious fish soup, the two of them gradually opened their eyes.

I went to the waterhole and caught some underground river fish, wrapped them in mud and burned them around the fire, and today we will spend the night here......