Qin Yu looked at Professor Wang, it was expected that there would be mercury in the underground palace, so everyone had discussed it before, if there was mercury in a place and they couldn't speak with a gas mask, then use a pen to write on paper to communicate.

Otherwise, if they were able to speak, it is estimated that these three professors would have exclaimed in surprise at this moment, after all, under the underground palace, there is such a wide water galaxy current, which is not even much inferior to the real big river, and anyone who sees it will be shocked beyond measure, and it is difficult to calm down in their hearts.

Swish!

Professor Qi took off the backpack on his body, took out the pen and paper from it, wrote a line of words on the paper with a brush, and then handed it to Qin Yu.

"The length and width of this mercury are unknown, but I don't know how deep it will be?"

This is the question that Professor Qi wrote on the paper, Qin Yu glanced at it, got up and walked to the river of the Water Galaxy, and Professor Wang and they also walked over, and when they walked to the river, everyone felt the breadth of the Water Galaxy even more, and at the same time found that the Water Galaxy was not forbidden, but flowed slowly.

It's just that because the mercury flows very gently, if you don't look closely, you can't find it at all.

Qin Yu stared at the water and the Milky Way flow, and Professor Zhang on the side took out a bundle of special measuring rope from his bag, this kind of measuring rope has a length scale on the top of the rope, and one end of the rope is buckled with a heavy object.

After untying the metering rope, Professor Zhang threw one end of the rope into the water galaxy, only to hear a plopping sound, and the rope quickly sank under the surface of the river, constantly sinking.

Everyone just watched the measuring rope being pulled into the river one by one, and seeing that there was not much left of the measuring rope, everyone's faces were full of shock, including Qin Yu.

In the end, there was only one last piece of the rope left, if it weren't for an offering to reach out and grab this end. I'm afraid that this bundle of measuring ropes will be completely submerged in the river.

"The whole length of my measuring rope is 100 meters, which means that the depth of the river is more than 100 meters. Professor Zhang wrote this line on a piece of paper.

One hundred meters, that may not sound like much. But as long as you are familiar with the river, you know that 100 meters is already a very scary data.

There are almost not many famous rivers in China that can reach this depth, and most of them are between a few meters and a dozen meters. It's just that some lakes have such depths.

And don't forget, this is still underground, and the depth of a water galaxy is more than 100 meters, what kind of concept is this, in terms of the width and length of this river, this is more than any recorded canal in history, the scale is larger.

Is such a huge river really dug up by 800,000 people?

This doubt haunted the hearts of Qin Yu's eight people, as well as the amount of mercury. Everyone guessed wrong, the amount of mercury has reached a very terrifying level, with the mining capacity of the Qin Dynasty at that time, it was really able to dig out so much mercury?

However, Qin Yu knew that now was not the time to care about this, and there would be experts and professors like Professor Qi who would study this issue in the future, and what he had to do now. It's about finding a way to get through this watery galaxy.

There is no need to think about it, Qin Yu also knows that this fifth mechanism is this water galaxy. If you want to move on, you can only cross this water galaxy.

Mercury, also known as mercury, is an inert chemical element, and there is no other taboo except that the gas emitted is toxic, of course. Because of the high density of mercury, although people will not sink, but it is precisely because of the high density that if people row in mercury, it is the same as walking in the swamp, which is very difficult.

However, these are not things for Qin Yu, and he can even fly directly from the mercury, as long as he borrows his strength, but Qin Yu has not acted yet, because he vaguely feels that this water galaxy should not be so simple.

"Hmm!"

Just when Qin Yu was looking at the water galaxy, not far away, there was a voice, Qin Yu looked in the direction where the voice came from, there, an offering was waving to everyone.

"Let's go, what might you find, go over and see. ”

Qin Yu ran in the direction where the enshrined was, and the enshriner saw Qin Yu and a few people coming, and pointed to his feet with his hand, Qin Yu noticed that there was a stone tablet at the foot of the enshrinement.

At the bottom of this stele, there are obvious fractures, which shows that this stele should have been erected on the bank of the river, but later it was broken for unknown reasons.

Seeing the stele, Professor Wang and the three of them pounced on it as soon as possible, and the three of them surrounded the stele, and then wore gloves and used a brush to carefully brush off the dust on the stele.

Obviously, even if it is Qin Yu, when he encounters this stele, the first time he will wipe off the dust on it with his hands at most, so that he can see the words on the stele, and he will not be so careful at all.

Of course, Qin Yu also knew that if he asked these three professors to speed up at this time and not be so careful, it was estimated that Professor Wang would have the intention of taking off his gas mask and preaching to himself, so for the sake of this Professor Wang, he would better remain silent.

After the tea time passed, Professor Wang and the three of them finished cleaning the dust on the stele, and the handwriting on the stele was finally revealed in front of everyone's eyes.

"Zhen Huanghe?"

Qin Yu immediately saw the three simple characters on the top of this stone tablet, and read them softly, and then his face showed doubts, he knew about the Yellow River, but what does this add a town word mean?

Could it be that this stele was used to suppress the Yellow River, but where did the Yellow River come from?

"That's not right!"

Qin Yu's gaze suddenly turned to this water galaxy, most of the buildings in the ancient emperor's tombs were built by imitating the buildings in front of him, and he even wanted to move everything in his life to the tomb.

And who is Qin Shi Huang, that is the first emperor of the ages, is the emperor who unified the six countries and became the emperor of the vast Chinese territory, in the eyes of Qin Shi Huang, his greatest wealth is this great river and mountain, with Qin Shi Huang's conceit, even if he dies, he will bring this great river and mountain into the tomb.

But the rivers and mountains are fixed and cannot really be taken away, so the only way is to imitate, and this is the real purpose of Qin Shi Huang to indoctrinate the rivers with mercury.

When it comes to rivers, the Yellow River is the most representative, and it is logical that Qin Shi Huang named this water galaxy flow the Yellow River.

Thinking about this, Qin Yu also knew why this stele was called Zhenhuang River, and the role of this stele should be used to suppress this "Yellow River".

And when Qin Yu figured this out, Professor Wang and the others also finished reading all the words on the stone tablet and began to write these words on the paper, Qin Yu picked up the paper and took a look, and found that the words on the paper were exactly the same as he thought.

According to the written record on the Yellow River stele in that town, if the stele is erected here, the "Yellow River" will always be calm, but if the stele breaks, it will mean that the Yellow River has broken free from the suppression, and no one can cross the "Yellow River".

"Let me see this fracture?" Qin Yu motioned for Professor Wang and the three of them to leave, and he squatted down by himself, carefully observing the fracture of the Yellow River Monument in this town.

After only looking at it for a while, Qin Yu found some strange places, first of all, the fracture of this stele is very neat, this is not like it was broken by itself after the traces of time, it is more like it was broken by someone all at once, only in this way can we explain why the fracture is so smooth.

In addition, there is a recessed semicircular groove at the fracture of the stele, and the lower part of the stele that is still embedded in the ground also has a concave semicircular groove.

Without hesitation, Qin Yu lifted the Yellow River tablet in that town, this scene made Professor Dewang and the three of them change color together, you know, this stone tablet has existed for almost two thousand years, and it is easy to destroy it if you are not careful.

That is, now the three of them are wearing gas masks and can't speak, otherwise, according to Professor Wang's character, he must have pointed at Qin Yu's nose and scolded Qin Yu, scolding Qin Yu for not cherishing cultural relics.

"That's exactly what happened. ”

Qin Yu didn't care about the faces of Professor Wang and the three of them behind the gas masks, the stone tablet was put back on the broken place by him, and after the two coincided perfectly, there was a circular slot in the middle position.

This shows that there was originally a round thing on the Yellow River stele in this town, and the most likely thing was a round bead, but after the Yellow River stele in this town was artificially destroyed, the bead also disappeared.

"Round beads?"

In Qin Yu's mind, he suddenly thought of an object, the general handed him a box, in that box, in addition to the door knocker, there were other things, among these things, there was a round bead.

Qin Yu believed that what the general gave him must be related to the mausoleum of Qin Shi Huang, so he no longer hesitated, reached into his arms and took out the round bead.

It was a black round bead, the surface exuded a black luster, the density should be above the lead, although it was very small, but it was very heavy, but what kind of material it was, Qin Yu had studied it for a while, but he didn't see what the reason was.

"Just try your luck. ”

Qin Yu whispered, and then, carefully placed the round black bead on the round hole on the top of the stone stele, and after doing this, he left the stone tablet with his hand and waited slowly.

The other seven people on the side, who didn't know what Qin Yu was doing, all looked at Qin Yu with some doubts, but just when everyone was puzzled, a loud noise came from the water galaxy. (To be continued.) )