According to the cowhide map provided by Jing Jianghua, the group climbed several small hills, passed through patches of primeval forests, and it took more than two hours to finally find the dark river leading to the belly of the mountain.

The so-called dark river is the opening of a limestone cave, and as soon as you enter the cave and walk down obliquely for more than a dozen steps, you can see that there is a river at your feet.

However, it is more appropriate to say that it is not so much a river as a deep stream, which is almost a meter lower than the ground, and the water depth is about three meters, and the current is very slow, and the first half is hidden underground, until the terrain in the cave is low.

The cave is very wide, An Mingxuan used a flashlight to shine into the depths of the dark cave, the height difference inside is very large, the wide place is very wide, the low place is only more than one meter high, there are many lava rocks formed for more than thousands of years, all of which are strange.

This is only the entrance to the cave, and the environment inside will be more complicated, and it seems that if you really want to pass through this cave, you will need to lie on your stomach to get to guò in some sections.

Except for the sound of the murmuring water, the whole cave is unusually quiet, and the various birds and insects in the jungle outside are not heard here at all, and it is more like a completely isolated underground world.

After walking for so long, Nangong Wu and An Kexin no longer had the excitement they had at the beginning, and they became a little overwhelmed, both of them were panting and sweating, and kept fanning themselves.

They looked at the deep cave, they were already frightened, and they also realized that it was a very reckless act to insist on visiting this tomb with Ye Xuefeng, but now it was too late to say anything, and there was no way out. Not to mention that they themselves don't have the ability to go down the mountain, even if they are asked to wait here and not enter the cave, Ye Xuefeng is not at ease, because there are beasts or something that run out of this mountain, and the two girls can't cope with it.

"Now you know that you're afraid, this is the consequence of not listening to me!" Seeing that their expressions were no longer relaxed, Ye Xuefeng said angrily, but suddenly felt that it was better to let them follow this time, at least they could learn a lesson, and listen to their own words obediently in the future.

The two girls surprisingly didn't refute this time, just glared at her with a small mouth.

"Hehe, okay, don't be afraid, don't you two be afraid, won't the sky fall and I'll still be on top of it? From now on, you two must stay with me so that I can protect you closely, and with me, you will not be in trouble!" “

"Hmm!" The two girls nodded obediently.

After comforting them, Ye Xuefeng turned his head to look at An Mingxuan and Bai Songyang again: "Two uncles, the basic situation of this cave and this river is like this, how can we go in and make a raft?" “

"I must make a raft, and it must be fast, the climate in this mountain is changeable, you see that the clouds above are getting thicker and thicker, I am afraid that the sky is going to change, let's make a raft quickly, and strive to rush forward to the mountain before the rain." An Mingxuan looked at the gloomy cloud above his head and said.

The three men didn't dare to delay, they all carried machetes to find those buoyant trees to cut, and they didn't dare to go too far, because Nangong Wu and An Kexin were waiting obediently near the entrance of the cave, not that they didn't want to help, but they really couldn't do this kind of rough work.

Of course, they also have their use, which is to take the trees that the three men have cut back, use the paratrooper knife to gently remove the trunks and leaves, and then tie them up with ropes.

The five people worked together and made rapid progress.

It didn't take long for a small wooden raft to be made, and the experienced An Mingxuan tightened the last rope to make sure it wouldn't fall apart, and finally called it a day.

Bai Songyang went to the cave to explore the depth and flow of the waterway, and estimated that carrying five people plus all the equipment was more than enough for the buoyancy of this wooden raft.

So Ye Xuefeng dragged the wooden raft into the cave with a rope, and when the front foot entered, thunder rumbled and showers fell outside the back foot.

Ye Xuefeng pushed the wooden raft into the water, and the first one jumped up, inserting a long wooden stick into the water from the front of the wooden disc to fix the wooden raft and prevent it from being washed away by the current.

Later, Nangong Wu and An Kexin also jumped down with the help of the two adults, but it was the first time for them to get on this kind of artificial raft, and they had no bottom in their hearts, as soon as they came up, their legs and feet were weak, and they couldn't stand swaying, Ye Xuefeng could only hold one in one hand, hugging their slender waists, and they all grabbed Ye Xuefeng's arm tightly and snuggled up to him.

Before they could get in, they were so nervous that if they really got into the hole, it would be unimaginable! Looking at their pale cheeks and rapid heartbeat, Ye Xuefeng had to comfort them gently.

Later, An Mingxuan and Bai Songyang saw this scene, and they also shook their heads helplessly, these two Nizi, if they don't hit the south wall and don't look back, now they know that they are afraid, right? It's a pity that it's too late to regret it!

An Mingxuan then also jumped up, Ye Xuefeng saw him come up, so he half-hugged and half-hugged the two girls and walked forward a few steps, An Mingxuan retreated to the end of the wooden raft at the same time, maintaining his balance.

Then Bai Songyang threw up the two big mountaineering bags full of equipment one after another, and then jumped into the middle himself.

As soon as he came up, the whole raft sank down, and the two inexperienced girls thought that the raft was going to capsize, so they screamed in fright, but fortunately, An Mingxuan quickly dragged the two mountaineering bags to the end of the raft where he was, so that the raft could regain its balance.

On the raft, several people were making the final preparations, because there were a lot of upside-down stalactites and stalagmites in the cave, in order to avoid breaking their heads, they asked Bai Songyang, Nangong Wu and An Kexin to put on the mountaineering helmets respectively, and the helmets had strong lights on them, which could be used for six to eight hours.

In the end, Ye Xuefeng propped up the strong light searchlight at the front end of the raft, this kind of strong light searchlight consumes a lot of energy and cannot be used for a long time, so it is turned on every one or two minutes in order to confirm the condition of the cave in front of it.

Waiting for Ye Xuefeng, who was at the front, to install the last fixing bolt of the strong light searchlight, he finally started to set off.

He turned on the bright searchlight, saw the terrain in front of him, reached out and pulled out the long wooden stick inserted in the water, and under the impetus of the slow current, the raft moved forward and slowly drove into the depths of Youlan Mountain.

Unlike the hot and humid weather outside the mountain, the deeper you go down the mountain, the more you feel the cool breeze hitting people, and from time to time you will see a group of phosphorus fires flickering in the distance, which indicates that there are animal corpses, and it seems that this is not a lifeless world.

Sitting on the raft, you can still feel some water snakes and small fish swimming, Ye Xuefeng put his hand into the water and tried it, the water here is even a little biting, in this hot season, such a low water temperature is really rare, maybe there is snow water flowing directly down on the top of this Youlan Mountain.