cpa300_4(); There is no concept of time underground, and Xue Lang's way of resting is not the same as that of ordinary people, so they just meditate and rest halfway, for about an hour at a time, and then continue to move forward. 【Reading Books Free Novel Reading】

The holes in the underground are not regular, and Xue Lang's perception is not able to see everything, some passages have been walking for an hour, but they are actually dead ends, and they have to go back to find it again, sometimes it is thousands of meters around, up and down, drilling back and forth, it is simply a maze.

After more than a dozen hours, they found the underground river, a section of the river that was about 100 meters exposed.

The underground river roared into a huge hole with a diameter of twenty or thirty meters, and went downward.

Here, it is no more than 20 meters from the ground, and it is only 3,000 meters from the base, but it is a dead end.

Xue Lang stared at the hole where the river roared down and made a dull echoing sound, and his brows furrowed.

Along the river, he could see a kilometer.

Unfortunately, the river is closed along the way, except for those that are poured into the main river to connect with the outside world, the river only increases the flow, but there is no channel that can be connected to the outside world.

The holes are like the tributaries of a river, water can flow through, but people cannot, and in some places they are simply teacup-sized holes and cracks, all over the rock wall.

Everyone stood behind him, watching the turbulent river in the pillar of light on the rocks where the water flowed, waiting for the results of Xue Lang's investigation.

Xue Lang also looked around carefully, and saw that it was four or five hundred meters, but he never found a passable passage.

In other words, the only way to reach the base along the underground river is to enter the river and follow the current all the way to the base.

But this is absolutely unrealistic.

Not to mention that their coveralls have a built-in oxygen supply for only half an hour, even if they can breathe infinitely, in the passage, down the water, even if the rock wall has been washed smooth by the current, there are no protruding edges and corners, but there is no shortage of turns, and there is even a place for vertical descent, not to mention people, even if it is an iron lump, it doesn't take a few hundred meters to be smashed and shattered.

The most troublesome thing is that once they miss the place they left, and this underground river only has that section of the river that is leaking like this one, then they have only one place to go, which is to go into the center of the earth to see if this is the way to the unknown world.

Xue Lang was silent, and the others didn't squeak. If they were to jump in here and go down the water, they wouldn't hesitate.

After more than ten minutes, Xue Lang looked at all the locations he could see, along with all the holes above and below, and finally confirmed that the river here, in addition to the current location, is surrounded by small holes except for cracks, and it is not dense, and there are no predicted passages on both sides of the river, and they have reached a dead end.

Xue Lang looked at the hole that seemed to swallow the river like a black hole, waved his hand, and ordered to leave here.

Everyone didn't know what they meant, they all followed silently, walked out of two or three hundred meters, and in a relatively dry fork hole, Xue Lang put down his backpack, took out food, and sat down silently.

Everyone knew that he was thinking, and they all put down their backpacks to eat, and no one interrupted him.

Chewing the special compressed biscuit like chewing wax, the small piece bubbled infinitely in his mouth and turned into a mush, and Xue Lang didn't swallow it.

He was wondering if he should abandon the original plan of the river, which was obviously surrounded by rocks and no passages, so it was impossible to reach his destination.

Unconsciously swallowed a mouth full of mush, subconsciously took the kettle handed by Jasmine, and before he could drink it, he suddenly reacted, everyone was waiting for his plan.

When he looked up, he saw that everyone was staring at him.

Xue Lang smiled, took a sip of water and said, "Everyone rest, the river can't be used." ”

Call......

Everyone sighed in the affirmative.

It's not a hassle to take a detour, this has long been mentally prepared, but Xue Lang hasn't spoken, and everyone is holding back.

After Xue Lang came back to his senses, he talked to Liu Yucheng and Jasmine in detail about the situation he saw along the river and the situation around the river.

After he finished speaking, Liu Yucheng was still pondering, and Jasmine put away the kettle and said: "The location of the river requires a solid environment, or a fault will be formed directly before it is here, and it will not be necessary to worry about it if it is impassable, and it is impossible to dig and go downstream, so we will take a detour." ”

As everyone looked at her, she continued, "Although this is a naturally occurring landform, it is not unruly. ”

Xue Lang also turned his head to look at her, not knowing what feasible plan she had. A detour is a certainty, but whether it will be possible to get around the base or not, it is difficult to say.

Jasmine paused, then said, "The landform here has been formed for a long time, and the river has been preserved for countless years. The surrounding water should have not changed its flow direction for so many years, so as long as we follow the relatively large cave and use the underground river as a hidden reference, no matter where we go, we will always get close to the underground river and get close to the base if we follow the traces of the water flow, unless the underground river forks before that. ”

That's right!

Xue Lang's eyes lit up.

That's what he's worried about, the underground river is the only coordinate that can be used for reference, without the guidance of the underground river, he doesn't know if he will miss the base. And the compass has lost its role here, or else, there is no need to count on the river to guide it. And the compass of the willow defeat city, when you get here, you can't see too far, the direction, sometimes there is a deviation, it seems, the relationship of geomagnetic influence.

Without direction, if you drill underground for half a month, but stay away from the base, wouldn't it be a great delay?

Even if you can get close to the ground to seek positioning, it is too dangerous, especially when you are close to the base, and you can't expose it at will. But follow the current, faintly lock the location of the underground river, and take a detour far away, at least you don't have to get close to the ground to seek positioning.

Liu Yucheng also nodded in agreement, but he was afraid that he would have to make a long detour.

The three of them briefly discussed, and soon, they locked the plan.

Xue Lang is a man of action, and the sooner they leave the base, the better. So, you still have to do your best to find it, whether it is a crystal or not.

Decided to go, everyone rested for a few minutes, continued on the road, returned, walked for a thousand kilometers, went around, went around this area, relocked the direction, Xue Lang took the lead, and everyone continued to walk through the underground cave.

If they don't look for the underground river, they don't have to go down the cave with the current.

So, although I went deeper underground, I went a lot faster.

It's just that the temperature in the cave is really low, although it is not a freezing temperature, but because it is underground, the temperature is always more than ten degrees, if it is not for the thermal insulation effect of the coveralls, they are afraid that they will get sick in the past two days.

No longer looking for the river, Xue Lang also consciously chose a dry location to travel.

Although it is underground, it is not wet everywhere, and in some places it may be that the water has not passed through here, or there may be a hole in the middle of the huge rock support, and anyway, although it is not a dry environment, it is not damp with a shield covering the water while standing.

This drill is not aimless, even if the place selected is actually the environment of the dry point, but the traces of the water flowing through the hole are clear and variable. Even if there are times when the flow is reversed according to the hole, the general direction is still there.

Therefore, they went around, but they still locked the underground river thousands of kilometers away, and they were never very far away.

Xue Lang drilled through a half-human-high, thirty or forty-meter-long passage, and the moment he entered a huge space, he paused in the light.

Here, it's a bit like a sinkhole, but it doesn't go through, and in the line of sight, the diameter is more than fifty meters, and the height is also thirty meters, a very huge place, overhead, there are even hanging tree roots, and there are also on the rock wall, like an upside-down forest.

Underneath, however, is a waterhole-like place, and you can't see how deep the center is.

When they arrived in the new environment, everyone turned on the lights above their heads and tried their best to figure out where they were.

Zhang Jian withdrew his gaze from the root of the tree above his head, the pillar of light moved towards the pond, and said with a smile: "This firewood is here, if there are fish in the water, wouldn't it be possible to eat hot?" ”

As soon as he finished speaking, Xue Lang stretched out his hand and turned off the light above his head.

Everyone was immediately silent, and Lisuo turned off the lights and listened quietly.

Halfway through, Xue Lang smiled, turned on the light and said, "Gopher, I can't see that you have the ability to predict the future." ”

"Won't there really be fish?"

Zhang Jian was surprised.

Others were equally surprised.

To know that the carp jumps over the dragon gate or something, there must always be a gentle section, the water is not turbulent, and the fish can swim upstream. And here, it is definitely impossible to breed fish by yourself, and if there is, it is also foreign, so under such conditions, the possibility of having fish is zero.

Xue Lang shook his head, put down his backpack, and said, "I don't know if I can eat it yet, let's get it back first." ”

Of course, Liu Yucheng and the others won't say anything, after eating beef jerky for two days, compressing biscuits, and changing the taste is not a bad thing.

However, no one would think that there was some kind of magical fish there, which became superhuman after eating. That's legend.

Everyone's interest is quite high, in this closed environment, it is rare to find some fun, grilled fish is good.

So, everyone cheered, put down their backpacks, and before Zuo Boyang and Liu Chengcheng followed Xue Lang into the water, their eyes were locked on the hanging tree roots.

The little girl originally wanted to follow, but was blocked by Liu Chengcheng.

The unknown world, even if you don't think about those legendary things, you have to think about safety.

Xue Lang and the three of them carried knives on their backs, empty, and walked towards the water in front of them against the edge of the pool.

After walking a few hundred meters, Xue Lang stood on the edge of a water stream that flowed down from above, more than two feet wide, close to the state of a waterfall.

Along the way, they waded through more than half a foot of water, clinging to the edge, and did not stop at the deep water, but went straight here.

Under the light, a black object floated in the place where the water was rolling, much like the back of a fish.

Liu Yucheng stood and looked at it carefully, and said with a happy face: "It's very similar to a baby fish, it has no scales, but it also has no feet, and the pectoral fins are not the same thing as the baby fish." ”

Xue Lang also felt like a baby fish, and the reason why he didn't come to a conclusion at the time was that he didn't see the relationship between his feet.

But on the outside, it really looks like a baby fish.

But he didn't step forward, just looked at these things that were more than a meter long and a foot short, waiting for Liu Chengcheng's judgment.

They don't have to eat anything they haven't seen before, so they're still very careful.