Chen Yuan Nunu said: "It's not that it's suspicious, but it's really being monitored." It's just that the external communication lines are being spied on. They can't listen to our internal lines and satellite phones. So when you contact the old man, you have to use your own communication network, or call directly from a satellite phone. ”

"Hmm!" Qin Cheng nodded and asked, "Do you know who did it?" ”

Chen Yuan shook his head: "Their methods are quite clever, you know, many of our communication engineers here are halfway monks. But it's safe to assume that more than one force is spying on our external contacts! ”

Qin Cheng asked, "When did you find out?" Do you want us to send some people over there to support you? ”

Chen Yuan replied: "It's the closest. ”

He got up and smiled and said to Qin Cheng: "If you don't say it, I also want to ask for someone from you!" ”

Qin Cheng nodded.

The two then left the sauna together and returned to Chen Yuan's office in the military command center.

Here, Qin Cheng called the old man Qin Mushan with a satellite phone. And told the old man the news he got from Chen Yuan, as well as the results of the two guesses.

After about a few minutes, Qin Cheng hung up the phone, and Chen Yuan immediately asked, "How is it?" Did the old man say anything? ”

Qin Cheng turned around and said to Chen Yuan seriously: "The old man was also surprised when he heard the news! And agreed with our speculation and felt it was worth investigating. Moreover, he did know some other secrets about Tibetan Province. ”

"What is it?" Chen Yuan asked impatiently.

But Qin Cheng shook his head and said, "The old man said that one or two sentences on the phone were not clear, and said that he would say it in person when we went back in two days." And he also has to ask people to find some information to verify it. In addition, the old man also reminded us that it is best not to make this matter public! As long as a small range of people know! ”

Chen Yuan nodded.

In a few days, the members of the American delegation will return to Shenwu Pass, and they will indeed go back as well. And this matter, the stake is too big, and it is true that there is no rush for this day or two.

So Chen Yuan and Qin Cheng stayed at ease again. Continue to deal with government affairs, after the last war, there is still a lot of work left over from the Iron Castle! Those who should take a bath still continue to take a bath, and it is rare to have a few days of leisure. I'm going to have to give him a break.

At the same time, the Americans had successfully arrived in Dadu and began to visit and inspect Dadu.

Dadu is located in the western part of Hebei Province, and is about to reach the mountainous area on the border of Jin Province.

The mountains are rolling here. But there is no shortage of large villages and towns.

Because in the past, Ji Province itself was also a province with a large population.

And the main reason is that it is located in the Central Plains region, which has been in the center of Chinese civilization since ancient times.

It is one of the regions that the major forces are constantly fighting for.

Over the past thousands of years, there have been countless wars here.

As a result, many people moved to the mountains to escape the war.

As a result, a large number of people have multiplied in the mountains.

However, these towns are now mainly concentrated along a few major transportation arteries.

The location of most of the capital is relatively remote and inaccessible in the past.

Its main base is underground, a super-large secret base designated 04192.

It was excavated by the state in the past to prevent the outbreak of a nuclear (harmonious) war.

It can accommodate 300,000 people to live in it, and there are large reserves piled up in it.

After the end of the world, it was put to good use.

Now, however, they have also established a large settlement on the ground on the hill where their main base is located.

After all, people can't just hide underground for a long time.

And this secret base can allow 300,000 people to live in it.

But that's the most extreme case, using the living space of the underground base to the extreme.

But it's very crowded.

If you stay for a long time, there will definitely be problems. What's more, at this time, the population of Dadu has exceeded 450,000 at all.

And the space on the ground is much better when it is used.

Today, the majority of the population lives on the ground.

The whole hill is densely packed with houses and crisscrossed streets.

At the foot of the hill there is an oval-shaped wall that encloses the entire mountain.

However, the urban planning, architectural design, layout, scale, living environment, and scale of the city wall here are much worse than those of Shenwu Pass. Not to mention the Steel Keep.

It's about the same as David's settlement in the United States, even if it's a little better, it's only a little better.

This was already felt by them on the plane, when they were about to land in Dadu.

Because the airport in Dadu is at the top of the hill where their settlement is located. When the plane lands, it flies over the settlement. David: They sat on the plane and had a panoramic view of the entire metropolitan settlement.

In most cities, the reason why the airport was built on the hill was because there was a lack of flat and open land in the mountainous area where the airport could be built. They had to flatten the hill to make it an airfield.

It is enough, because the hill where they live is still quite large, and it is relatively regular. It was that when I landed, I almost scared the American driver to pee!

If you're not careful, once the plane slides off the runway, it will slide straight down the hillside!

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Let's go back to the urban construction of Dadu.

First of all, the city walls here.

The walls of Dadu are only about 35 meters high, only about seven or eight meters thick, and have a circumference of about 10 kilometers. This is much smaller than the walls of Shenwu Pass and Steel Castle!

The main reason is the scarcity of cement and steel.

Even if they have adopted the most economical scheme for the construction of the city wall.

In other words, a 1.5-meter-thick wall with an outer wall made of reinforced concrete, earth and stone in the middle, and a wall built with bluestone and granite stones mined in the surrounding mountains on the inside.

But the amount of cement and steel that needs to be used is also a huge amount!

They were deep in the mountains, and it was difficult to collect cement and rebar.

It is also not enough to produce it yourself.

Where there are places like Shenwu Pass and Steel Castle, there are abundant resources around. And people will also take the initiative to send it to the door to trade!

Therefore, every time I see Shenwu Pass engaging in various infrastructure construction and settlements, it is simply a time when they are changing with each passing day. Most of the people in the capital are still very envious. Although he didn't say it, many people still regretted why they didn't go to Heituyere with the people of the Qin family to develop in the first place.

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