"Not bad. The mineral content meets the drinking and irrigation standards. It's not weak alkaline water."
Li Yi's test results came out when a new batch of Winged Knights went down to investigate.
It was not weak alkaline water. Weak alkaline water was suitable for watering acidic soil.
People had a lot of stomach acid. Drinking weak alkaline water could neutralize it.
However, there was also a saying that weak alkaline water was suitable for bacterial reproduction. Therefore, if the bacteria content in the water exceeded the limit, it could not be drunk.
Now that the water was neutral, it could be used for anything.
It was indeed geothermal. Some of the minerals in it were high.
It was not hard water if used for drinking.
"We should raise livestock and poultry locally on a large scale and drink the water from the underground lake."
Li Yi considered raising fish locally on a large scale.
Mineral water had a lot of trace elements. It was good for the animals' bodies. Some pigs would gnaw on bricks when they lacked food.
Domesticated geese usually did not eat fish or shrimp. They would occasionally eat small ones.
"Another big fish." Cheers came from Li Yi's car.
Li Dan looked at the screen connected to the underwater camera. He saw a big black fish being killed by the Winged Knights under the light.
There were many other fish around that were coming toward the light.
"The water temperature is high, and then …"
Li Yi was thinking about what to eat when he suddenly froze.
He got into the car and said to the Winged Knights with the camera, "Turn off the light. Turn it on in 20 seconds."
The man gestured, and the others turned off the light with him.
The moment the light went off, a weak light appeared on the screen.
"A treasure!" Li Yi thought of a science fiction novel. As long as the light was turned off, the surrounding stones would glow.
It looked like the light was not coming from the stones. It was refracted from somewhere else.
"Go find the source of the light. No, send the fish up first and change the oxygen tank." Li Yi thought about eating first.
The fish looked to be about two meters long. It was not easy for a big black fish to grow so big.
It was said that some big black fish could stay on land for a while and then swim in the water like crocodiles. When they saw animals drinking water, they would twist their way to the shore to eat.
Anyway, Li Yi had never seen it before. It was theoretically possible.
Another big fish was brought up. The diver changed the oxygen tank and went down again.
The commoners were all curious. It was a pity that they didn't have phones, otherwise, they would definitely take pictures and post them on social media.
The diver dived down again to search for the source of the light. About twenty minutes later, when he was about to return, the light in front of him suddenly became brighter.
The Winged Knights swam towards the light. When the lights were turned on, a dazzling golden light appeared.
"Gold?" Li Dan swallowed her saliva.
"Turn off the lights and continue forward," Li Yi instructed.
The heartbeats of the five of them almost became chaotic. They swam forward again, and their surroundings were filled with light. It was even brighter.
As he swam down, the light in the tunnel gradually became stronger.
He swam again and went up. The passage was U-shaped.
Then, they saw a thin layer of ice on the ground. They used the drill in their hands to prick it. The ice cracked, and it shone brightly.
"Two of you, bring down the oxygen tanks and pass them to the other three. Leave the cameraman behind. Two of you, go up and find your way back."
Li Yi knew where the light was coming from. A U-shaped channel had appeared somewhere, and the area was very large.
This should be a cave. The sunlight shone in through various scattering and refraction, entering the underground lake.
It provided the creatures inside with the necessary light for photosynthesis. Then, the fish and prawns grew inside.
"Xiao Yi, is that gold?" Li Dan was still staring at this matter.
The others also shone brightly. There was a lot of gold.
Li Yi shook his head regretfully. "Sulfur iron ore, definitely not gold. But this mine …"
Li Yi was conflicted again. In order to ensure the light in the underground lake, the ore in this U-shaped channel could not be mined.
It was not a problem to dig in other places, but he would need to send people to protect it.
If it was him, this would become an underground lake diving area. Everyone would come here to play diving, but the prerequisite was that the black fish were cleaned up.
"Why is it not gold?" Li Dan could not accept this result.
Li Yi smiled and patiently explained. "The place we live on is called Earth. Many years ago …"
He explained to the people around that gold was very dense. At the same time, there were platinum, tungsten, iridium, osmium.
Among these things, tungsten was the most abundant. The other metals were also quite abundant.
However, a long time ago, Earth was full of lava. The metals that were dense and not as abundant as tungsten sank.
Therefore, the underground was full of lava. There was a lot of gold there. Anyone who could take it out could use it to build a house.
And what they saw now was definitely not gold. According to what they saw, there should be millions of tons.
Li Yi's explanation was very straightforward and detailed. Everyone listened very carefully.
"Xiao Yi, how do you know?" Li Yi was not thinking about the gold now. He was thinking about Li Yi.
"It was all taught by the masters. About 30 years ago, I …" Li Yi began to push the blame to the masters again.
No one believed him. You were only 20 years old after the New Year, okay?
But they believed what Li Yi said. The Earth was round. Even without Li Yi's explanation, they already knew.
It turned out that there was a time when the gold fell down on Earth.
"Can gold be taken out from the ground?" Wu Jieyu was more concerned about the practical problem.
"Lava, volcanoes, there is a saying in the book of Northern History: There is a volcano in the southern border of the country. The rocks beside the mountain are all red. The ground is ten miles long before it solidifies. When people take it into medicine, it will flow yellow.
There is a little bit of it in a place hotter than this. Only then can gold be taken out. Who can go down? "
Li Yi told Wu Jieyu that the volcano was just the beginning. After that, it would be flowing and boiling metal.
What would it feel like to be poured with molten iron? From head to toe, one would not feel anything in an instant.
"Li Lang, who wrote the book of Northern History?" Princess Yongmu did not have any impression at all.
"Li Yanshou, Li Xialing, history of the country during the Zhenguan period."
Li Yi gave the answer so skillfully that he could find out what he wanted to find out in an instant.
This showed that his speed of searching for information was fast and he was familiar with the use of the System.
System: "…"
Everyone believed him again. The name was given and there were also words.
The words given by Li Yanshou were quite interesting. It complemented the name.
When they went back to check, they would definitely be able to find out if it was written during the Zhenguan period.
"You are so knowledgeable?" Liu Jieyu looked at her daughter and then looked at Li Yi. She was satisfied.
She felt that Xiao Yi was a good child. She was rich and talented. Most importantly, she was beautiful and delicate.
Don't be fooled by her delicate appearance and she could fight.
She was good to her daughter and doted on her all day long. Moreover, she was not restricted to the Li Family Zhuangzi. She even set up a Fragrant Orchid Pavilion outside.
In the future, when she planted Monkey Head Mushrooms, the income of 800,000 to 800,000 yuan a year would also belong to her daughter.
Most importantly, he did not go outside to find other women. Nothing happened when the Nan Qu's' big family 'from Pyong Kang Square came over.
As for Xiao Lan, Xiao Lan belonged to her daughter and would not compete with her daughter for favor.
Such a son-in-law, compared to …
Liu Jieyu thought about it and looked at Li Longji. There was nothing to say. Li Longji had too many women.
Fortunately, he did not continue to look for women now.
She followed him. That … was quite good!
Empress Wang and Wu Jieyu were not suitable. She could have another child.
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