"How?" I smiled speechlessly, if it was someone else, unless it was excavated by the state, it would not have been able to be opened at all.

Because if there is a big movement, this place collapses, like using explosives, it is very risky, and it is easy to detect.

And large-scale modern machinery can't be driven in at all, even if it's electric welding and cutting, I'm afraid it is also difficult.

Not to mention the fact that there is a lot of gas emitted by mercury around it.

I am the only alien who can breathe without my mouth, and I am not afraid of such poisonous gases.

"Burn it with fire, let the little finch spit out the Vermilion Bird Fire, and it will soon melt this King Kong wall. Grandpa said.

Listening to his grandfather's voice, he was very excited, although he had obviously become a Dapeng, but after all, he had been a Taoist priest for a lifetime and a native of Tufuzi, so he still missed the inverted bucket in his bones, and he especially wanted to find the excitement of the lower bucket again.

In particular, the feelings of finding rare treasures are beyond words.

Not to mention grandpa, even me.

I called out the little finch, and as soon as it came out, it exuded a crimson light, and in the entire dark abyss, like a huge torch, it lit up a radius of dozens of meters around me.

Pump!

The little finch made a crisp sound, and then a dazzling light suddenly appeared on its body, and then a fire dragon spat out directly from its mouth.

As soon as the fire dragon went out, it boomed infinitely and magnified, and the fire roasted on the wall of Vajra, and the wall made a crackling sound, and then the smell of metal immediately spread.

There was even a hot wave of air coming to the nose.

After burning for a while, it was found that the copper water was flowing down the wall, with a crimson glow and white smoke, flowing in the direction of the moat.

The terrible heat scorched all the places it passed into white smoke......

Gurgling, purring......

Suddenly, from behind the Vajra Wall, there was a gurgling sound.

The sound is a bit like blowing air into a water bottle with a straw, and it's like the sound of water boiling in a kettle.

"Be careful, little finch. I reminded aloud, "There may be a mechanism behind this wall." ”

The words are not finished yet.

Poof!

A huge fountain spewed in the direction of the little finch and me.

I flew back quickly, and I was very touched by the little finch's move, and the huge wings opened and blocked me behind......

My eyes widened, my heart jumped to my throat, and I wanted to shout at the little finch to dodge away, but I couldn't shout anymore, and it was too late.

I saw a gushing out, like a reservoir flooding, squirting towards the little bird.

It's just that when the liquid was about to pour onto the little finch's body, the little finch's body suddenly erupted with a raging vermilion finch flame.

The flames were like dragons and tigers, engulfing all the incoming liquids with visible momentum, protecting the little finch's body, ensuring that the liquid was volatilized into gas before it touched the little finch's body, and returned in the direction it came.

"Mercury, it's mercury. "I flew into the air, and the little finch flew into the air, and we looked down at the middle of the Vajra wall.

A large hole was made in the middle of the wall by the fire, and then mercury was spewed out from the mouth of the hole, and the white mercury was very magnificent, like molten iron, and when it landed, it made a crackling sound.

The mercury flowed in the direction of the moat, and in a short time, the water level of the entire moat rose a lot, but after it rose, after a while, the liquid level slowly lowered again......

"What's going on?" I was dumbfounded as I watched the moat go up and down.

"This is the self-draining function of the moat, which means that the height of mercury in the moat can never be spread out of both sides of the moat. Grandpa explained.

I nodded, I can understand this, because many tombs, especially large tombs, will pay attention to the drainage system, otherwise when it rains, the groundwater seeps into the tomb, and the whole tomb will be soaked, and the owner of the tomb obviously does not want to be flooded after death.

Therefore, for the tomb, the drainage system is necessary, especially for the imperial tomb of Qin Shi Huang, this level of mausoleum, the drainage system is even more profound, as I see now, even after more than 2,000 years, this drainage system is still available, and it is very timely and easy to use.

I looked up at the middle of the diamond wall, looked at the mercury gushing out suspiciously, and asked suspiciously: "That's not right, this mercury has been spraying for a while, it stands to reason that no matter how much mercury there is, the water potential should also be weakened, but you see, this water potential has no tendency to weaken at all, is there so much mercury in it?"

"It is said that there are rivers, lakes and seas composed of mercury in this Qin Tomb, forming a map of the Qin Dynasty after the unification of the six countries, so it can be seen that there is quite a lot of mercury, tens of thousands of tons may not be, but thousands of tons should be there, even after more than two thousand years of volatilization, there are at least hundreds of tons, and what we see in front of us, the flood discharge is only a few dozen tons, and wait, it should soon flow clean. Grandpa explained, unhurried, but excited.

Well, then wait, and you can only wait.

We all stared at the spitting of mercury......

Ten minutes later, the intensity of its spit was still the same......

Twenty minutes passed, and the amount of spit it increased rather than decreased......

Half an hour passed, and there was no sign of abating.

Now not only me, but even my grandfather was stunned, he said: "This, how is this possible? Since there are hundreds of thousands of tons, and it has been dried up for such a long time, why is there so much mercury?"

"No, grandpa!" I suddenly realized that something was wrong, but I didn't clear my mind for a while.

"What's wrong, Xiaofan, what did you find?" Grandpa asked.

I looked up at the gravel floating above our heads, and I said, "Grandpa, you see, these rubbles are suspended in the sky, and there is a strong buoyancy in the ground to hold them up, just like I am suspended now, but you look at the mercury, all of it is flowing down, and there is no sign of floating upwards at all." ”

"yes, why didn't I find that?" exclaimed Grandpa.

"Could it be that the mercury is very heavy, so it can't float? "I remember when I was in junior high school, I thought I heard about it.

"That's not it, no matter how heavy this mercury is, can it sink past those huge stones?" said Grandpa, shaking his head.

"Not true. I took a deep breath, and as if I understood, I said, "This moat is not a drainage system at all. ”

"What?" Not only Grandpa, but even Yuelan exclaimed, "Then what is this?"

"It's a circulation system, use this system to prevent theft!" I told them what I thought, and I said, "Originally, when this wall was not destroyed, the whole system was balanced, that is, the mercury could not be washed out, but after we burned a hole, the mercury flowed out, and after it flowed out, it entered the moat, and then it entered from the moat, and then it flowed out again through this hole, and so on......"

"It's really like this...... "Grandpa said in surprise, "if it's a cycle, then you have to use a lot of pressure, because the terrain of the moat is much lower than the King Kong Wall." ”

"The pressure, of course, is there, and it's very big, with the middle of the diamond wall as the watershed, down is the downward pressure, up is the upward pressure, the upward pressure is the buoyancy, the buoyancy that holds these steps up, the downward pressure is the pressure that pushes this mercury into the moat, that is, this pressure, which promotes the never-ending operation of the whole system. I took a deep breath, and after explaining, the whole person was not calm, the design of this Qin Ling was really magical......