Yu Zhen guessed that it was because she scared her last night, so she took the opportunity to take revenge on him today.

Of course, they went to the city and had a hearty hot pot in the end.

When I got home, it was almost early morning.

Qiu Yun still has a lot of work to do tomorrow, and Yu Zhen didn't want to go home anymore, so she called Luo Bian out of bed and took him to the cave.

He was very curious about where this underground river flowed.

After putting on the diving equipment I bought from the city, the two of them jumped into the water.

The downward gap was originally very narrow and could not accommodate one person at all, but this was nothing to Yu Zhen. He turned into a hardworking excavator and dug all the way.

Not long after, I passed through these hundreds of meters of ending.

What appeared in front of the two was a huge water surface with a diameter of at least a thousand meters.

Above the water surface is a dome dozens of meters high, with many faint light spots on it.

"Is this the light of fluorite?"

"Fluorite will not shine when there is no light for a long time."

"Then what is shining?" Luo Bian asked.

"It's a bug."

Yu Zhen felt that he had clearly captured an insect that he had never seen before. This insect was like a firefly, with a transparent belly and a small spot of light inside.

He didn't know what these bugs grew up here, but who can tell the magic of nature clearly?

The two flew close to the vast water surface and soon arrived on the other side.

The water in this underground lake is very shallow and there are no creatures in the water, which disappoints Yu Zhen a little.

Sure enough, will things like Overlord Salamander only appear in novels?

On the opposite side of the underground lake is another narrow passage, which has not yet reached its end after flying for several kilometers.

But vaguely, he heard a huge roar from the depths.

Luo Bian also heard it.

"With such a loud sound, is it an underground waterfall?"

"You'll know if you go and have a look?"

Yu Zhen speeded up and flew forward a few kilometers, finding the source of the roar.

It's indeed a waterfall.

But not one, but two!

The underground river they came to rushed into a huge deep pit and formed a slender waterfall.

And not far away is a huge water flow of dozens of times or even hundreds of times the flow!

The huge roar was made by this current of water impact below.

Yu Zhen took Luo Bian to the middle of the pit, feeling the rumbling roar, and admiring the magical craftsmanship of nature.

"Master, where did this big underground river flow from?"

"Bayankala Mountain? Kunlun Mountain? You have to see it before you know it." Yu Zhen shook his head and said, "But what is certain is that these waters are all melted by snow water.

"It's summer now, and the snow melts quickly, so the flow of this underground river is very high and the water flow is very fast. I guess some places can't get through at all.

"But in winter, the water level will drop, so we'll go and find out later."

"I have to do this." Luo Bian said with a little regret, "But this trip was not in vain when you can see such a spectacular underground waterfall. I just don't know where the water flows again."

"You'll know when you go and have a look."

Yu Zhen took Luo Bian and sneaked into the deep pit below.

But unfortunately, the water in the pit is not as deep as expected.

About twenty meters below is a honeycomb-shaped rock, and all the water washed down from it flows through holes smaller than fists.

He tried to dig a long way down, but he never found space again.

Seeing that most of the oxygen was consumed, the two decided to return and prepare to explore slowly next time when they have enough preparations.

But just when I was about to look back, a spiritual hole appeared in Yu Zhen's perception range.

He could not sense the space with a diameter of about one meter.

As he stopped releasing spiritual energy, the small space was still expanding rapidly, just as something quickly absorbed the surrounding spiritual energy.

He first sent Luo Bian to the shore, then returned alone and dug the hole.

It's a very strange stone.

It is about the size of a football, with a smooth surface and a blood-red whole body.

If you have to compare it, it is like a magnified red egg.

What's strange is that the temperature of this big egg is much higher than that of the surrounding rocks, and as long as there is a little bit of spiritual energy around it, it will be absorbed quickly and can never be absorbed out again.

Yu Zhen injected it with a lot of spiritual energy, but did not fill it up, and it felt like a bottomless pit.

In the end, Yu Zhen decided to bring this thing back.

So he made a tray with the rocks and returned with the big eggs.

But the temperature of this big egg was getting higher and higher, and the water dripping on it immediately evaporated. When they arrived at the first underground lake, the whole stone became like burnt charcoal.

"Master, this thing shouldn't have radiation or something?"

"It shouldn't be," Yu Zhen said, "If there is strong radiation, I can feel it."

"So what's the reason for it to be like this?"

Yu Zhen is not very clear either.

The magic of nature, he has seen only a drop in the ocean.

Finally, he decided to soak the big stone in the water. It took him a few hours before the temperature slowly dropped.

But the water temperature is still more than ten degrees higher than the surrounding water temperature.

"Let it stay here first, and then study it when you have time later."

"That's all."

It was the next afternoon when I walked out of the cave.

If you satisfy your curiosity to a certain extent, then you will have to do serious things next.

After absorbing enough spiritual energy home, Yu Zhen took Luo Bian away from Baiyun Village and flew towards the other side of the ocean.

Luo Bian must carry it with him.

Otherwise he would not be in the village, and God knows whether the person who wants his life will come again.

Just as they left, the big stone egg left in the cave flew out of the water.
Chapter completed!