Hyun Momiji stared at the ground on the other side of the river for a while, which was full of feces and bones, and suddenly understood the reason. Pen, fun, pavilion www. biquge。 info

She opened her mouth and told us: "Lao Tian smells not poisonous gas, but ammonia, and you can't go to the other side of the river, otherwise you will die." ”

It turns out that because of the large number of bats at the top of the cave, thousands of tons of bat feces have accumulated on the side of the cave, and these things will be like a huge biogas digester, releasing a huge amount of ammonia and methane, and with the continuous accumulation of concentration, those toxic gases can reach the level of killing people.

When it comes to danger, those bat droppings are even better than centipedes.

As for why there is no foul smell on the underground river and the other side of the river, according to Hyun Momiji's thoughts, it is likely that it has something to do with the extremely special air circulation system of this cave.

Similar to what I had guessed when I came in earlier, Hyun Hongye also believed that there was an advanced and complex air convection system in this cave, and this system was related to nature and the factors that were thought to be excavated.

Because of the existence of this "system", the air will be extremely dry when we enter the well, and the existence of this system also allows the formation of two opposite air convection environments on both sides of our body, and the two convection environments take the dark river in the middle as the "neutralization point" so that the moist air on one side cannot cross the other side of the river, and the poisonous gas on the water bank cannot cross the water surface for a single minute.

It is likely that because of this special set of air illusions, centipedes and bats on one side will form a distinct division pattern, thus sandwiching us in the middle of this river.

…… After Xian Hongye said this, I also understood what the situation of everyone was, but the next question was no less than just now.

You know, it's impossible to go to the other side, because we only took three gas masks when we came down, and when we met the centipede just now, the one of Hyun Hongye had already been kicked away by me with her backpack, and the rest may not be able to support our survival in the high concentration of poison gas.

And it's unlikely to go back to the other side of the river, and I know that even if the centipedes are now gone, as soon as our feet set foot on the river, the harmful things will surely follow the smell of blood on our bodies and continue to do harm.

In this way, the three of us tacitly understood that there was only one possibility left.

Take the waterway! Follow the stream all the way up.

At present, there is indeed only this one way, because if the "things" that took away Lin Shaosong and Baturu are really some kind of large creatures, it is likely that there is only one way to go, and the discovery of this dog also indirectly proves this possibility.

So, without saying much, I took out a bundle of climbing ropes, locked the backpacks and belts with buckles to each other, and everyone helped each other up the river to the source of the farther water.

Along the way, we slowly realized the coldness and danger of this underground water flow, as the four of us gradually deepened, although the deepest water was not above the ankles, it became colder and colder, and as the flow increased, it took away the heat from the body more quickly, and after only ten minutes, I couldn't even feel the presence of my toes.

But even so, we can only grit our teeth and move on, because Baturu's life and death are unknown now, and I want to save him and everyone.

In the insistence, Xian Hongye clutched the placket of my and Wang Yao's clothes, her face was also extremely ugly, her purple lips were also telling us to "speak", and the heat in her body was also rapidly lost.

Xian Hongye's sensitive hand seemed to be able to feel me and Wang Roar trembling in the cold water, so she said to me and Wang Roar with some self-reproach: "Everyone is shaking so much, for my business, you two are in trouble again." ”

I shook my head slightly and said, "Your business is ours!" And ......"

I didn't go on, because I wanted to ask Wang Roar if Hyun Hongye had feelings for him.

But in the end, I didn't say it, firstly, the environment was not suitable, and secondly, I felt that the question did not make sense.

I feel that Hyun Hongye is the same as her father, a businessman in his bones, such a woman is very smart and capable, but she is definitely not the master of the family. And after coming into contact with Xianyuhe and Yahai Nanzi, I suddenly found that the social circle and emotional world of their rich people are too complicated, so complicated that ordinary people like me are daunted.

In Hyun Hongye's bones, there is something that makes me feel uneasy and afraid, and this kind of thing is called "class".

Because of the existence of these two words, I feel that it is a very thankless move to match Wang Roar and Xian Hongye, and it is ...... It doesn't make any sense.

Besides, although Lin Shaosong is unbearable, he can throw 100,000 euros for Xian Hongye, but what can Wang Yao do for Xian Hongye? Do you have nothing to do and beat people every day?

With these miscellaneous thoughts, I don't want to say anything more, Wang Roar seems to be more knowledgeable, he shook his head slightly, said a quick go, and then stopped saying anything.

I looked at Wang Yao's solemn face, and suddenly felt that this guy seemed to be absent-minded, and he was thinking about some questions that I couldn't understand just like when he first came out......

What the hell is wrong with this kid?

In this way, the three of us finally came to the end of this series of water after flowing backwards in the freezing stream for half a day!

That...... is an underground waterfall.

The drop of this underground waterfall is very high, we use a flashlight to shine, we can't see the top of the waterfall at all, only a rough estimate, think about it is more than ten meters.

The waterfall descends almost vertically down the stone wall, forming a one-square-meter pool, and behind it is a huge cave wall, covered with bat droppings and strangely shaped stalactites, and we shine a flashlight, and we don't see any steps or ladders to climb on the stone wall.

For a moment, we were in a desperate situation again.

Faced with one predicament after another, everyone was inevitably a little discouraged, and Wang Roar threw the dead-looking dog into the water, wiping his sweat and shaking his head: "Dead and heavy...... What can I do? No way again. ”

Compared with Wang Yan's anxiety and my discouragement, Xian Hongye was much more careful, she did not speak, but picked up a flashlight, carefully observed the structure of the small waterfall and the stone wall of the cave, and seemed unwilling to give up the only hope she had.

Although Hyun's attitude of abandonment is good, I don't think this kind of needle-in-a-haystack search should be of little use, and even if there is an entrance, I think the most likely place is not the stone wall, but the small pool formed by the perennial impact of the underground waterfall.

Wait a minute! Pool!