It is said that after Chen Jing entered the underground dark river, he headed in the direction of Gaoqi Volcano.

There was not the slightest light in the dark river, and if it weren't for Chen Jing's open-hanging thing like bioradar, he would have lost his way in this underground river.

After swimming for about half an hour, Chen Jing came across an intersection.

The water flowed quietly without hinting at anything.

Rao is bioradar still has a detection range of 500 meters, and Chen Jing does not know where the two intersections lead.

There seems to be no direct road between this underground river and the Gauzi volcano.

Chen Jing chose the road on the right.

That feeling is guiding, and only to the right will there be results.

Another ten minutes.

Something strange finally came out of the bioradar. The space ahead is vast, and the flow of the river slows down.

Chen Jing immediately accelerated his swim forward.

After passing through the exit of the dark river, Chen Jing came to that place with a wide space.

It's a huge underground lake!

The bioradar quickly detected all the conditions of the lake and threw everything into Chen Jing's mind.

There are creatures here.

The size is not big, but Chen Jing really feels the tenacity of life.

Due to the lack of light, the creatures in the lake have degraded the eyeballs.

The scarcity of food sources makes their metabolism extremely slow.

Chen Jing could barely see anything that could be called food here.

Leaning against those small insects on the rock wall that are not even the size of a scale?

It would have to be a slip off the feet of the little insects.

In the water, Chen Jing couldn't imagine how these blind fish and shrimp survived.

Perhaps more hungry than whom?

But what about their reproduction?

With respect for life, Chen Jing finally just observed and left.

This fragile ecosystem can't stand up to his mess.

Officially landed.

Chen Jing stepped on the ground of the cave and took a careful breath.

He couldn't guarantee that there would be plenty of oxygen.

However, the results were very good, and the oxygen content was beyond Chen Jing's imagination!

Of course, this does not mean that the oxygen content here is higher than that of the outside world.

"Since there is so much oxygen, there must be a connection between this cave and the outside world." Chen Jing looked around.

But the so-called "connected places" are somewhat unexpected.

It is a few wind tunnels that are only half the size of Chen Jing.

Even if you have tools, you can't chisel through.

After glancing at those wind tunnels, Chen Jing left behind.

The whole underground space is huge, and this is just one of the caves for it.

Upon entering this vast underground, you will find that there is no luminous substance or sound.

Except for Chen Jing.

Chen Jing paced in this underground space, becoming the only source of sound.

The sound also alarmed a large number of small creatures.

A colony of cave spiders resembling balls, with fluff and eight slender legs, is gathering.

Those cave spiders were attracted by the movement caused by Chen Jing, and they were very curious to gather towards the place where Chen Jing had walked.

Even Chen Jing himself didn't know.

The little debris that fell from his body was a big meal for these tiny cave spiders.

As he went deeper, a huge underground ecosystem began to unfold in front of Chen Jing.

Bacteria, as the most inconspicuous organisms here, play the role of the most important producers in the entire ecosystem.

The vast majority of bacteria here are able to produce energy by absorbing inorganic salts from the rock walls, as well as specific substances.

Individual bacteria in this category are even capable of emitting light.

Although a single luminescent bacterium does not have a role, when it glows together as a colony, it is a great contribution to the underground space.

The blue shimmer is connected into patches, accompanied by the ecological activity of bacteria, which is sometimes bright and sometimes dim.

Wonderful feeling.

The advent of light feeds simple single-celled plants – algae.

These algae, which come here with the flow of water, release oxygen and become nutrients while photosynthesizing.

The excellent ability to reproduce has given those underground creatures a richer source of food. Even because the metabolism of animals in the water is slow and they do not eat much, the algae in the water can also be a food source for some insects that live on the shore.

There are producers, consumers, and naturally decomposers.

Acting as decomposers, there are fungi in addition to bacteria.

Fungi are also a type of food.

Occasionally, plants that follow the underground river come here, and those that can survive are tenaciously alive, and those that can't become nutrients in this fragile but tenacious ecosystem.

Chen Jing looked at the glimmer of light and cautiously stepped across a shallow ditch.

He didn't want to wreak havoc on the creatures he admired unless there were special circumstances.

Further on, another underground river appeared.

It wasn't the kind of river that Chen Jing entered at the beginning, the kind of river that was completely underground.

Although this underground river is not large, it can still be used by a canoe.

And the water is not deep, only to Chen Jing's chest.

The source of the water should be in front of you.

The current here is not very large, and it looks like it is just a tributary of the current ahead.

Dripping water.

There are no visible creatures in this river.

The closer you get, the louder the roar becomes.

Just listen to the sound and know it's a waterfall!

The drop caused by geological activity caused the underground river to form a waterfall.

The water fell above due to the effect of gravity, and the white water vapor permeated the entire waterfall, and Chen Jing thought it was because of the waterfall at first.

But as he got closer to the waterfall, the water began to rise in temperature!

There is only one answer that Chen Jing can think of - underground hot springs!

This water vapor condenses due to a large change in temperature difference.

Above the waterfall, there is a natural hot spring that Chen Jing has been looking for. And it's definitely a huge natural hot spring water system!

Sure enough, that feeling was right!

Chen Jing was extremely excited.

This is the most critical part of the whole plan!

It has been more than a month since the plan for the biochemical structure of the steam engine was set out from Dolan City.

Even in the past month or so, he has knocked on the stone for half a month!

Even in this underground space, he has been wandering for a long time.

It's been found!

Now, Chen Jing is only one step away from obtaining the evolutionary equation of heat-tolerant cells.

As long as he can find living creatures in this underground hot spring.

As long as the existence of living beings can be found, even if they do not have the evolutionary equation of heat-resistant cells, Chen Jingtuo will drag a saber-toothed wolf down and feed it until it grows on them!

Looking at the underground waterfall, Chen Jing grinned.

The drop of the underground waterfall is not large, only eight or nine meters. At this height, Chen Jing jumped directly in the past.

He could climb up the crevices of the rock walls as long as he followed them.

Even with the cooling of the water, Chen Jing seemed to be able to feel the warmth of the rock wall.

The abundant geothermal resources of the Gaoqi volcano began to unfold in front of him at this moment.

The power of nature is still the power that Chen Jing needs to fear.