Yu Fei was like a cheetah hunting. After landing, he jumped four or five meters away.

Just after landing, my legs had already been curled up and ready to exert force, and my feet touched the soft ground again.

His legs exploded with force again, and he jumped out again, leaving a big hole in the ground.

The cave behind him was still collapsing. Yu Fei fled forward as much as possible. He escaped twenty or thirty meters before finally stopping. The collapse behind him finally stopped.

The power of nature is truly terrifying. Yu Fei was very lucky that he ran fast, otherwise he would have only burped after being buried.

However, this kind of collapse should not affect the ground, so it should not be discovered by people on the ground.

Yu Fei breathed a sigh of relief, but at this moment, the surroundings were almost plunged into absolute darkness. Ordinary people here would not be able to see a knife one centimeter in front of their eyes.

The humid air carried a musty and stinky smell, and Yu Fei frowned. He wanted to light a cigarette, but he knew that lighting a cigarette in this environment would most likely cause an explosion. The unknown gas was fully mixed in the air.

It must not be ignored.

After the explosion, the surrounding oxygen would be depleted and the flames would burn the remaining parts, so he gave up this suicidal idea.

But at this time, he also understood that he had no way out, the cave behind collapsed, and it was impossible for him to return the way he came.

Turning around and taking another look at the collapsed cave, Yu Fei had no choice but to continue moving forward. He didn't know where the water was going. Yu Fei kept praying, but he must not merge into the underground water. Otherwise, he might be forced deeper.

underground, even underground that cannot be left.

Yu Fei continued to move forward. For him, there is a saying that people with skill are bold. In such a dark place, he does not feel afraid. Although Yu Fei has never seen such a thing as a ghost, but through Ma Laodao's

Understand that most of them are actually harmless.

And logically speaking, there won't be anyone here underground, it's just you alone, and it's basically impossible for others to survive here.

So he started walking forward as if taking a walk. After walking for a few minutes, Yu Fei was almost sure that he had bypassed the human wall above his head.

But he made a deceptive discovery. He found that he was constantly going deeper underground, and there was no upward trend at all.

But this is normal, water flows to lower places, and people will not do anything that violates Newton's laws of mechanics in order to clear a path for Yu Fei.

Fang Zheng Yu Fei estimated that he was still far away from the base, so he continued to walk forward. He also wanted to know where the water went, but this walk went one or twenty meters deep into the ground. After five or six steps, there was still no end in sight.

Fortunately, the water in this cave seemed to be large enough, so the cave that emerged was large enough. Otherwise, if the water flow weakened as he walked, Yu Fei would have no way out, which would be the most deceiving thing.

Soon Yu Fei heard the sound of water. He was startled and hurriedly quickened his pace. After walking for a while, he stopped before he saw the water.

Because the water flow was only seven or eight meters away from him, but it seemed that two lines of underground water had converged together and flowed in from another entrance.

Approaching it rashly at this time is almost courting death, because after the soil here is soaked, it is very likely to become soft and then collapse downward.

Sometimes, if the water cannot flow through it, a lake or barrier lake will form on the ground.

Moreover, the water here should be full of very viscous mud. Once a person falls in, he will sink deeper and deeper, and there is no way to use force. It is impossible to escape. In the end, he will completely sink into the mud and die.

Yu Fei twitched his nose, and from the smell in the air, he suddenly smelled the smell of sewers, or gutter oil left by human activities!

This shows that the entrance of this water is near the human habitation area.

There are a lot of places where people live nearby, one is the town next to the base, and the other is the research base.

Yu Fei couldn't tell where it came from, but if he could go upstream, he might reach directly near their living area.

This is a surprising discovery, but it also represents a terrifying thing!

It's raining on the ground!

Only when it rains on the ground can enough water flow together and flow into the ground. This area is not big. If there is water flowing in from one entrance, it means that the other entrance is not far away.

The reason why there is no water left in the cave that Yu Fei is in is because Yu Fei collapsed the cave and blocked the path of the water.

But Yu Fei knew that he couldn't stop it for long. The power of nature was terrifying. As more and more water accumulated in the cave ahead, the water pressure would become larger and larger. The moment it reached the critical value, it would be like a landslide and tsunami.

The terrifying currents carried large amounts of sediment down.

At that time, even Yu Fei will probably be washed directly to the confluence of water flows below, and then it is unknown where he will be rushed.

So Yu Fei had to think of a way to survive the heavy rain first, and after the heavy rain passed, he could return to the ground in the cave following the water flow.

It was impossible for him to go to another cave where water was flowing to take shelter, because the current there was very strong at the moment.

After thinking for a few seconds, Yu Fei immediately made a decision. He would be a mouse and dig a hole for himself. Even if he couldn't dig into the ground, he would at least create a way for himself to survive.

He quickly took out his engineering shovel and estimated the location of another cave to avoid digging near another cave, otherwise he would be finished.

Yu Fei quickly dug in the other direction. He was holding an engineer shovel and had almost no energy left. He dug very quickly. After digging out two or three meters horizontally, he immediately started to raise the angle at about 100 meters.

It was dug upward at an angle of 45 degrees.

When you first start digging, the soil can still be piled in the cave outside, and the water will naturally wash it away. However, when more soil is excavated later, it is no longer suitable to pile it in the cave outside, which will cause obstruction.

As the water flows forward, the water may come back and flood the cave it dug.

So Yu Fei put all the soil into the Dragon Ball space. Yu Fei didn't dare to stop. He didn't know when the water flow in the cave on his side would clear the blocked position, but when it did, it would definitely be a disaster.

The terrifying water flow, the water accumulated on it, allows the water flow to accumulate enough gravitational potential energy, which results in strong water pressure. Therefore, at the moment of breakthrough, the speed of the front water flow will be faster than many people imagine.

After Yu Fei dug seven or eight meters upwards at an angle, he still felt that it was not safe enough. If the outlet where the water flow below merged was relatively small and water accumulated, water would still flow in from the cave he dug.

Slowly eroding away his cave.

So he dug straight up for a while, and then excavated at an angle for a while. In this way, with the same workload, the height he raised would not be the same.

Same.

Probably when Yu Fei rose to a height of about ten meters compared to the place where he dug the most, he suddenly felt a vibrating energy coming along the ground!

Yu Fei knew that the blockage was finally cleared!

Then, there was always a faint vibration under the earth. This was the movement caused by the rapid advancement of the violent water after breaking through the obstacles.

Yu Fei started his final effort and quickly began to expand his position so that he could accommodate more air!

With the internal force in both arms, every time the shovel goes down, a huge piece of soil will be dug out and then put into the Dragon Ball space.

Finally, Yu Fei felt that the water came to the entrance of the cave he dug, and Yu Fei's dragon ball space was full, so he simply stopped.

He squatted at the position he had dug and looked down. If there was a possibility of water coming up, Yu Fei would probably have to use the soil in the Dragon Ball Space to block the cave below, and then use the Dragon Ball Space

Use the vacated space to continue digging upwards.

However, Yu Fei listened for a while and found that the water flow was very smooth, with no possibility of siltation, and no water was flowing in from the cave he dug.

Yu Fei finally felt relieved, but he still wanted to smoke a cigarette. The conditions seemed to be better at this moment, because the water flow stirred up the airflow, and the air underground at this moment was a little cleaner than before, and even a little fresher.

Yu Fei estimated that there was not much combustible gas in the air, which would not be enough to explode. He took out the smoke and fire, stared at the darkness for a few seconds, put the cigarette in his mouth, and raised one arm to block it.

Eyes, holding a lighter in one hand, gently pressed the ignition switch.

Snapped!

A flame came out of the lighter but did not explode.

Yu Fei immediately put the cigarette butt up and took a deep breath.

call……

In the dark underground, a person lights a cigarette and feels extremely comfortable. At this moment, the whole world does not know that a person lights a cigarette here.

Yu Fei didn't know how long the heavy rain could last, so he finished smoking a cigarette, put out the cigarette butt, sat down cross-legged, and resumed his practice.

After a few hours, Yu Fei opened his eyes, because he had returned to his full strength, and all the internal energy and spirit he had lost before had been restored.

The heavy rain should have stopped, and the water flow has weakened a lot. This is water on the ground, and finally it gathers and flows into the ground.

However, we couldn't leave at this time. The cave was very muddy and we couldn't move forward at all.

Yu Fei had nothing to do, so he took out his mobile phone, opened an APP called "Zongheng Novel", and then found a novel called "The Wonderful Hand Shennong". Since it was cached in advance, he started reading it with gusto.

After looking at it for several more hours, the sound of running water finally stopped for more than half an hour. It was estimated that the penetration was almost complete, so Yu Fei reluctantly turned off his phone and prepared to continue action.

Yu Fei walked out of the cave he dug. The cave outside was indeed muddy. The cave outside even expanded a bit under the impact of the water. This is a normal phenomenon.

Yu Fei walked to the place where the two caves converged, and then entered another cave. Although it was very uncomfortable to walk with one foot deep and one foot shallow, but at least he could move forward.
Chapter completed!