She married a dying prince and she won three babies.

She also tentatively put her hand into the water, and indeed felt nothing.

Then she put her index finger into her mouth and tasted it.

"Ah, pah." After two breaths, Yu Yuanzheng felt a tingling sensation on his tongue.

At this moment, she also felt a tingling sensation on her hands. It wasn't severe, but it felt like she had touched something irritating.

"Husband, how does your hand feel?" Yu Yuanzheng asked immediately.

"It feels like an itchy feeling." Shangguan Ziqi also felt something strange in his hand.

"Father, please wipe your hands quickly. Mother, please take out your handkerchief and wipe your hands." Shangguan Yajing immediately handed the handkerchief in her arms to Shangguan Ziqi when she heard it.

After listening to her daughter, Yu Yuanzheng took out a handkerchief and wiped it.

But after all, I didn't wash it with clean water, so the itchy feeling was still there.

The two of them felt the same, which meant that there was something wrong with the water.

Yu Yuanzheng already had an idea in mind.

There is a high concentration of some chemical substance in the water, but what it is remains to be determined.

"General Feng Lei, put your knife into the water for a while and then take it out. I'll observe if there are any changes." Yu Yuanzheng thought of a possibility.

Feng Lei pulled his sword out of the scabbard and stuck half of it into the water.

"Wait a quarter of an hour before taking it out." Yu Yuanzheng said again.

After waiting for about a quarter of an hour, Yu Yuanzheng let him take it out.

He took the knife from Feng Lei and wiped the water off the surface with a towel.

"Your Majesty, Father, look, has this knife changed?" Yu Yuanzheng held the knife in front of several people.

Everybody gathered around to watch.

Three children also squeezed in.

"Mother, I can see the difference." Shangguan Changrui was the first to speak.

"What's different?" Yu Yuanzheng asked with a smile.

"The half that was submerged in water had a duller sheen. The top half, which wasn't submerged in water, looked as if it had just been polished."

"Yeah, you're right." Yu Yuanzheng was very pleased that the child had such keen observation skills.

"Second Young Master, I just sharpened the knife this morning." Feng Lei got up early this morning and sharpened the knife carefully. This is his knife, and he cherishes it very much and keeps it shiny at all times.

If the princess hadn't asked him to try the knife, he would have obeyed. If it had been someone else, he would have been reluctant to do it.

Everyone noticed this change.

"Madam, what does this mean?" Shangguan Ziqi asked the answer that everyone wanted to know.

"Well, let me think about how to explain it." This was a chemistry question, and she had to organize her language so that everyone could understand it.

“You’ve all tasted vinegar, right? We all know that vinegar tastes sour.

The same thing will happen if we put vinegar on this knife.

After a long time, the knife will become useless.

Because the knife will be corroded by the acid in the vinegar.

And there should be an acidic substance in this water, like vinegar.

This acidic substance corrodes the surface of the knife, so the gloss becomes dull.

I guess the acid in it is still very strong, otherwise it wouldn't have such a significant effect in such a short time."

After Yu Yuanzheng explained this, everyone understood.

"So this is why the water is not drinkable and why there are no fish?" asked the old prince.

"That's right, father. Think about it, if we put the fish in a big jar of vinegar, can they survive?" Yu Yuanzheng said by analogy.

"Of course not." Shangguan Changyu answered for his grandfather.

How can fish survive if it’s so sour?

"But if the amount is small, small enough, it's still okay. For example, we say sea water is salty and can't be drunk because the salt in it is very concentrated. If we pour a pound of salt into a large pool, will we not be able to taste the salt at all?"

"You mean, the water that the villagers usually drink may also contain the acidic substance you mentioned, but the concentration is very low?" Emperor Qiming thought of the water that the villagers drank.

"That's right. And there's a theory in medicine that hasn't been fully proven.

If a woman often eats acidic foods, she is more likely to have a girl. On the contrary, a woman who often eats alkaline foods is more likely to have a boy.

The villagers on the island have lived here for a long time, for more than a hundred years, and several generations have lived and died here.

Their constitutions have become acidic over time, so the likelihood of having a boy decreases as time goes by, and over time, they have reached the current situation."

After listening to Yu Yuanzheng's explanation, everyone suddenly understood.

"That is, we have found the reason, but we cannot change it," Shangguan Ziqi concluded.

"Yes, if it is true as I guess, this island is not suitable for human habitation.

"If we want to help the villagers, we have to move them out. Otherwise, in a few decades, there won't be anyone left here." Yu Yuanzheng said regretfully.

To be honest, this island is so big, it would be a shame to abandon it.

When they came in, they saw that the crops in the fields were growing well. According to Grandma Ye, their grain yield was very good.

"They are my people, the people of Great Wei. I cannot bear to see them suffer such a fate. So let's move them out. Great Wei can easily accommodate such a small number of people. We can take them away when we return."

Emperor Qiming knew the reason and made a decision quickly.

"It's still early. Since we're here, let's walk around the lake and see if there are any other discoveries." Yu Yuanzheng wanted to take another look.

Who knows, there might be some new discoveries.

"Yeah." It was rare for Emperor Qiming to see such a beautiful scene, so he took the lead and walked in front.

This mountain is the highest mountain on the island.

Standing on the top of the mountain, you can see very far, to where the sea meets the sky.

From a distance, you can see seabirds hunting on the beach and then flying back to the forest.

I guess he caught some fish and brought them back to feed the little birds in the nest.

"By the way, you just said that the water on the island has an impact on women, resulting in the birth of girls instead of boys. Then why is it that the birds on the island are not affected by this?" Emperor Qiming suddenly thought of this question.

Just now he was gazing into the distance and saw flocks of birds soaring in the sky.

"In reply to the Emperor, the birds here are all seabirds. Seabirds feed on fish, which contain a lot of water. Therefore, birds rarely drink the water on this island, so the impact is not significant.

Besides, not all birds have only one mate for their entire lives. In some species, one male bird can mate with multiple females.

Therefore, even if there are fewer male birds, it will not affect reproduction.

Just like the chickens raised by villagers, a family usually only needs one or two roosters at most.”

This was very straightforward and everyone understood it.

Everyone walked and chatted.

The three children are at the age of being naughty.

Playing and walking all the way.

He also played with the sword.

Shangguan Changyu and Shangguan Changrui started fighting, moving forward as they fought.

The adults watched them perform.

"Father, please practice with me. This morning, as soon as we got up, mother dragged us out to eat, and then we went out without doing any morning exercises. The scenery here is just right." Shangguan Yajing pestered her father.

Everyone was not walking fast. Shangguan Ziqi was doting on his daughter and drew the long sword from his waist.

The father and daughter started playing with each other by the lake on the top of the mountain.

Suddenly, Shangguan Changrui screamed.

He was forced back by Shangguan Changyu and then fell off a large rock.

Then he stepped on a small stone behind the big stone and overturned it.

Fell to the ground.

Yu Yuanzheng felt sorry for the child and immediately ran over to help him up.

"How is it? Did you fall?" Yu Yuanzheng asked anxiously.

"Mother, it's okay. I'm very tough." Shangguan Changrui patted his butt, picked up the sword and wanted to continue.

"Just keep quiet." Yu Yuanzheng scolded.

As a result, she took a step forward and was tripped by the stone that had just been stepped on.

He almost fell down, but was caught by Shangguan Ziqi who came and held him up.

Only then did Yu Yuanzheng look down at the stone.

When she looked down, her attention was caught by the bottom of the stone.

She squatted down and looked carefully at the area that had just been exposed under the stone.

"Your Majesty, Father, please come and see. We may have found a treasure." Yu Yuanzheng shouted excitedly.