Excellent tutor

All is gone! There are only a few scattered and lonely towers, sadly showing its former grace and magnificence!

Destroy the old world and build a new society!

This is what Xiang Yu, the overlord of Western Chu, did more than two thousand years ago.

What a majestic and majestic Afang Palace! Why can't I bear to burn it all in one fire?

It was not only the palace of the emperor, but also a gathering of various scientific and technological capabilities of the whole society at that time.

It is a concrete example of the degree of social civilization.

We can overthrow a regime! A society!

But what should be inherited must still be inherited! It cannot be completely denied!

Because society needs inheritance! Humanity needs inheritance! Skills need to be passed on! Civilization needs to be passed on.

Isn’t Zhang Chi himself a inheritor of civilization?

Xiaoya stood aside and knew that the leader was planning the future of this city!

Although the leader is usually joking and joking, he used to like to do things to himself, but once he gets into work and thinking, he is so devoted!

There is something special about a man who is deep in thought!

I heard Mr. Ren say it! The design of this city is a planning design institute! It will take two years to complete, and it is definitely not as good as the leader!

How much responsibility does that stalwart body bear!

How many wonderful ideas are stored in that small head!

Those skillful hands can do anything, and nothing seems to be difficult for him.

I really want to hold him in my arms! Study it carefully! Love me some more!

There are those hands! He always made trouble in the past...

Xiaoya regretted his past behavior, and now he wanted to put the leader's hands into his favorite place, so that he could enjoy his fullness and firmness.

And...

Xiaoya herself can feel that not only her face is getting hot, but her whole body is getting hot and soft.

"lead! Go back and take a rest! You’ve all traveled such a long way!"

"Then...let's go! All this sweat and dust!"

He held Zhang Chi's hand softly and walked towards her accommodation.

Xiaoya was surprisingly gentle.

"lead! I'll wash it for you later! Guaranteed to give you a clean wash!"

Bathing is just a prelude.

A farewell is better than a wedding! Xiaoya's passion and love, greed and tenderness made Zhang Chi unable to stop and wanted to die.

Two days later, Zhang Chi was able to enter the cave to explore.

Four hundred meters away from the side of the main cave entrance, There is a hidden cave entrance.

There are armed police standing guard at the cave entrance!

Two hundred meters into the cave entrance, I saw a steel gate.

It was estimated to be half a meter thick.

There was another closed steel gate in front of the steel gate.

There were two parked in the tunnel. A small submarine.

Zhang Chi and Xiaoya got into the narrow submarine door!

This time not only Xiaoya had to accompany him, but also several experts who were accompanying him also wanted to go in.

Xiaoya also came in for the first time, and at the same time, like Zhang Chi, It was my first time to ride on a submarine.

The sound of water flowing outside came in.

This was the second gate that had been closed just now, opened for water.

It took more than an hour, and Zhang Chi finally got out of the submarine.

It was too crowded inside, and the air was not good!

There was actually a small pier built at the exit.

This was something Zhang Chi didn't expect.

Five people came in just now, but Zhang Chi saw dozens of people.

"lead! This is Professor Liu, a geological expert! This is Professor Hu……"

Xiaoya introduced several important experts one by one.

Zhang Chi suddenly found an acquaintance in a corner

"aunt! You came in too?"

"What's wrong? I can't help but stand in front of you!"

"Aunt! You've been here for a long time, why didn't I know?"

Xiaoya also found out about her aunt

"Pick up your love brother! I can still see my aunt there!"

"Aunt..."

Xiaoya didn't leave the house for two days, and she was a little embarrassed to see her aunt.

Professor Liu pointed to the roof of the cave

"Brother Chi! Be amazed here! It is more than 200 meters high to the top."

Zhang Chi raised his eyes and saw that although there were many high-power lights installed in the cave, the dark top was still not clearly visible!

"Let's go! Go take a speedboat ride!"

"Speedboat...Is there a speedboat here?"

No, there were two speedboats parked quietly by the water.

Zhang Chi, Xiaoya, Gu Gu, and Professor Liu got on the speedboat that already had a driver.

Judging from the shape of the boat in front, it should be a escort

"Aunt! How long have you been in the cave?"

"More than two hours ahead of you! Professor Liu and I came in together.

Xiaoya asked:"Professor Liu is coming in for the first time too?""

"no! I've been in several times! This time I came in specifically to accompany you."

"Professor Liu is a top expert in geological research and an academician of the National Academy of Sciences! This expedition to Shambala Cave was personally hosted by Professor Liu"

"sorry! sorry! Professor Liu, please smoke."

Zhang Chi took out two cigarettes.

"I haven’t smoked in two years, so I have to try it today. Zhang Gong’s cigarettes are not easy to get."

Zhang Chi turned sideways to help Professor Liu. He also took a deep breath.

"Professor Liu! Where are we going?"

"There is a piece of land ahead, and we have to sit for another hour."

"How big is this lake?"

"After a simple measurement, the visible surface area of ​​this lake is more than 84,000 square kilometers. It is not yet known how large the other molten caves are and whether there are other larger lakes."

Xiao Ya was a little curious and said:

"Professor Liu! With such a large area, won't the roof of the cave collapse?

"This is a wonderful place in nature. Do you know what the top of the cave is? It is arched by several iron plates with a thickness of more than 800 meters. The land we are going to is entirely a large iron plate, more than 1,000 meters thick, and I don’t know how long it is. Counting the underground ones, it is probably hundreds. Thousands of kilometers long"

"Really! Now our country is not short of minerals."

"Lack of minerals! There are probably not as many proven iron ores in the world as here!"

"Professor Liu! What is the content of this mineral?"

Zhang Chi also wants to know

"Just now I said these were several large iron plates, and they were indeed iron plates. Zhang Gong! Do you know how much iron is contained in the iron ore with the highest iron content in the world?"

"Probably around 75%!"

"This is almost the case. The theoretical iron content of iron ore that can be produced in nature does not exceed 76%.

But the iron ore content here has been tested on more than 300 samples, all of which are above 70%, and there are not many impurities. This is high-quality iron ore among high-quality iron ores!"

"An iron ore content above 50% can be called rich iron ore! The general iron ore content in our country is only 35%, and the sulfur content is still very high, and the cost of smelting is also very high."