Qin Feng entered the cave, and a hot breath rushed to his face.

"Hot springs!"

As far as the eye can see, a pool of water seven or eight meters square is steaming.

The water in the pool overflowed and flowed to the underground river on one side.

The dark river flowed forward for a distance of more than ten meters, and the surface of the river turned out to be frozen ice.

Qin Feng understood it at once.

The Dark River is supposed to be the exit to the outside.

However, it is now extremely cold outside, and there is a rare and spectacle of a hot spring flowing water on one side and a frozen river on the other.

"And the place is really nice place. ”

"There are mountains and rivers, there is a huge arsenal that can be used as a refuge, and now hot springs have been discovered. ”

There is such a place to settle down after crossing over, Qin Feng feels that the system is very good to him.

Before walking to the pool, Qin Feng tested the temperature of the hot spring with his hands.

Very comfortable and not hot at all.

The most important thing is that Qin Feng believes that this hot spring should not have any viruses or radiation exceeding the standard.

It's all going deep into the ground at a depth of I don't know how many meters, and it should be an unpolluted place.

For the sake of safety, Qin Feng still spent 50 planting points and system transactions, so that it could be tested and confirmed that the hot spring water was really clean.

In this way, there is no longer any need to worry about being sealed in the arsenal and not being able to get out.

Even if the extreme cold lasts longer, it is not a big problem.

It's been almost a day since I tossed, Qin Feng and Haha are a little tired, eat something and soak in a hot spring, don't be too cool this day.

......

One man and one dog, and lived in the depths of the arsenal for a few days.

When I was hungry and thirsty, I ate second-generation apples, and when I was sleepy, I went to sleep in a room cleaned up in the dormitory area.

When it's cold, soak in the hot spring pool with a depth of only about half a meter to warm up.

Of course, haha only has the life of going to soak in the dark river, and Qin Feng is unwilling to soak in the pool with it.

Taking advantage of Qin Feng's inattention, haha secretly ran to eat a lot of mutant rat king's meat, provoking Qin Feng not to dislike it.

One man and one dog are now clean and clean, and there is no smell at all.

Especially haha, on the day I found the hot spring, I was pressed by Qin Feng in the dark river and washed it thoroughly, and there was only the smell of dogs left on my body.

A few days flew by.

But the specific time was a few days, Qin Feng didn't know, he just saw the ice melting in the dark river, and he knew that the extremely cold weather had passed.

With a lot of effort, Qin Feng figured out the exit of the underground dark river.

Speaking of which, this dark river is not simple.

From the hot spring spring, the waterhole is also a waterhole more than ten meters forward along the dark river.

This waterhole is relatively deep, about ten meters deep.

When the ice thawed, Qin Feng discovered this waterhole, and when he thought of the tomb robbery novel before the crossing, he dived down and took a look at it with curiosity.

This look is really similar to the situation in the novel.

There is a hole in the stone wall a few meters further from the waterhole.

Passing through the entrance of the waterhole, it turned out to be a hole overgrown with milky stones.

And this hole goes out a few dozen meters to the outside world.

Qin Feng felt that this was a place similar to the ancient tomb of the ancient tomb sect in the novel.

It's a pity that there is no peerless aunt in this.

The location of the exit of the dark river also gave Qin Feng a surprise.

Through observation, Qin Feng discovered that the entire arsenal was actually hidden behind a huge valley.

Walk through the valley to see the mountains outside the arsenal.

In this way, the valley also became a natural gateway into the Arsenal Mountains.

If this kind of terrain was in the ancient period of the world before Qin Feng crossed over, it would definitely be a treasure land that was easy to defend and difficult to attack.

As long as you guard the entrance to the valley, it will be a situation where you can't open it.

The waterhole entrance is located near the valley.

In other words, even if Qin Feng encountered danger in the arsenal, he could quickly escape from this hole.

After some investigation, the only thing Qin Feng didn't figure out was where the underground hot spring dark river flowed.

It's also a shame that you can't take advantage of the clean water of this dark river outside.

Opening the door of the entrance of the arsenal gate and seeing the cloudy sky again, Qin Feng was in a good mood.

The outside world looked even more desolate, and everything that had been frozen still looked bone-chilling.

The mutated boar became a block of ice that had to be thawed before it could eat its meat.

After so many days, the pork must have been purified, which Qin Feng was very relieved of.

The second-generation apple trees on two unpolluted plots of land are slowly rejuvenating, and their leaves are still green.

Even the second-generation pepper trees have sprouted, but they can't pick up the peppers anymore.

The only headache that gave Qin Feng was actually the apple tree destroyed by the mutant eagle in the second field.

It's too tiring to carry alone, and it's not very effective.

"Why can't the second-generation plant body self-destruct?"

"If I can only pick the fruit once and then waste it, how can I have so much land to grow things!"

Qin Feng suddenly felt very tired and began to complain.

"Ding!"

"Please systematically clean up the non-polluted land, and charge 0.5 planting points for 1 square meter. ”

The system gives a method.

"Ugh!"

"How does this charge feel like a property management fee in the community......

"Okay, I admit it!"

Qin Feng was a little helpless and began to calculate the cost.

After exchanging the special potatoes, Qin Feng never exchanged anything, and spent 50 planting points to let the system test the water quality of the hot springs, and then later, because he couldn't plant things for the time being, he forgot that he could exchange special goods every day.

Now Qinfeng still has 354.5 planting points left, multiplied by 2, which is also the number of square meters of land that can be cleared.

709㎡。

After calculating the data, Qin Feng wanted to vomit blood again.

The total net worth is not enough to clean up half of the area of the second unpolluted land.

Wait a minute......

Qin Feng suddenly remembered the crystal nucleus of the mutant beast, and his eyes looked at the corpse of the mutant boar.

"I hope you have a crystal nucleus in your body!"

In addition to whether there is a crystal nucleus in the body of the mutant wild boar, Qin Feng is also worried about whether the crystal nucleus will also be purified or absorbed by the unpolluted land.

No matter!

Originally, he was going to thaw the corpse of the mutated wild boar by himself, but now Qin Feng couldn't wait.

A few fires were lit to speed up the thawing by the mutant boar carcass.

An hour later, Qin Feng held an earthy yellow crystal nucleus in his hand and let the system estimate the price.

"How many planting points can this crystal nucleus be exchanged for?"

"Ding!"

"25% of the source power level 1 earthy yellow mutant beast crystal nucleus can be exchanged for 330 planting points. ”

The system quickly gave a price.

"Why is there so little source power of this crystal nucleus?"

The source force content of the earthy yellow crystal nucleus was at least, which made Qin Feng a little surprised.

"Ding!"

"Unpolluted land can absorb the source power of crystal nuclei and improve the natural fertility of the land. ”

"Plants on this land can increase yield by 3% and crit yield by 3%. ”