Xia Qing's eyes were a little weird when she looked at Xinlan, just like a big sister looking at her little sister, so Xinlan was a little uncomfortable.

Xia Qing smiled and said: "This area is a sensitive area, first of all, it is close to Outer Mongolia and close to the border area of Russia, so although this area belongs to our country, the radar band covered here is very dense, that is to say, as long as there are flying objects in the sky here, they will be detected immediately, and the three countries are highly vigilant here, once there is any problem, everyone must inform each other as soon as possible, which has formed a kind of conformist practice. If someone takes the initiative to act in the region without informing, they will inevitably be reacted to, and this may cause a diplomatic crisis, do you know what I'm talking about? ”

Gao Chao nodded, looking at Xia Qing's eyes seemed to have a sense of admiration, he really didn't expect that Xia Qing still knew so many things about this area, it seemed that her work was very meticulous, at least much better than Xinlan and them.

To put it bluntly, this place is a no-fly zone, even if you insist on flying without taking into account the feelings of the other two countries, it will at least alarm the attention of the military in this area, and no matter what, it will be a troublesome problem, and it is very likely to leak your own purpose, which can not be explained clearly.

After listening to Xia Qing's words, Xinlan's face was slightly red, she was a little embarrassed, and suddenly felt as if she was very naïve.

So Xinlan immediately said, "That...... So what do we do if we can't use airplanes? The cliffs of this place cannot be climbed, and the roads are destroyed, so should we now make our own way out? ”

Xia Qing is naturally a person who takes care of the overall situation, she knows Xinlan's feelings now, and she also knows that she has to give Xinlan a step down, so she hurriedly said: "Actually, Xinlan, what you said is not wrong at all. ”

Xinlan was stunned for a moment, and seemed to think of something, so she said, "What do you mean?" ”

Xia Qing said with a smile: "We can indeed build a way out by ourselves. ”

Gao Chao was stunned at this moment, Xinlan was also stunned, and the fat man said directly: "I'm grass, Sister Xia, you won't be teasing us, right?" You want us to get out of this place sooner? That...... How long does that take? Isn't this a fool moving mountains? ”

Xinlan also said, "Xia Qing, what do you mean? ”

Xia Qing explained unhurriedly: "Think about it, in such a big mountain, is there an air compression device, that is, an air bomb launch system? ”

Gao Chao nodded and said, "Yes, does your idea have something to do with this air compression device?" ”

Xia Qing nodded and said: "I once read a report from the 101 Institute, which is about the analysis of the principle of the air compression device, in the ancient tomb on the Tianshan Mountains, that is, the air compression device I mentioned, it is made in combination with the local landform, and its main principle is a bit like the working principle of the water gun, that is, the flow rate and water pressure increase through the narrowing of the pipe diameter, so as to achieve the possibility of water gun shooting, so in aerodynamics, there is also a similar principle, that is, through a line from thick to fine, Then through some complex curve design, the air will not regurgitate at the same time, is gradually compressed, so that the density of the air is getting higher and higher, and the air flow rate is getting faster and faster, when the opening of the end of the shot, the air will be like a water column in a condensation way, quickly shot out, to achieve a lethal effect. ”

Everyone was listening to Xia Qing speak, but only Gao Chao said: "But what does this have to do with us building a road?" ”

Xia Qing looked at Gao Chao and pursed his lips, obviously a little disappointed, Gao Chao was a little embarrassed, feeling as if he was a fool.

At this time, Xia Qingcai explained: "Think about it, one side of this mountain peak is this kind of air compression device, what does this mean? ”

Unexpectedly, her question was answered by the fat man first: "Sister Xia, do you mean that the inside of this mountain is already hollow?" ”

"That's right!" Xia Qing finally said with a smile: "With such a powerful air bomb, it can only mean that some very complex air compression channels have been carved out in this mountain, what we need to do is to find the location of these air compression channels, and then enter from there, I believe that when the ancients made such a complex system, they must have left a lot of steps in it, so as long as we enter this system, we can enter the ancient tomb smoothly." ”

Gao Chao said in surprise: "I finally understand, great, Xia Qing, it's really you, this is indeed a good way." ”

The fat man also applauded and said, "Yes, good idea, and we have explosives in our equipment, as long as we find the right place to shoot it, we will basically solve the problem." ”

- It was getting brighter, and it was another sunny morning.

When everyone could see the stone wall in front of them, they were already thinking about where to place the explosives.

However, a plan is always a plan, and when you want to put it into practice, you will always encounter real difficulties.

Now, they are already in trouble.

To place the explosives, they need to climb the stone wall in front of them, because they need to blow up an air bullet hole in the mountain wall, and they found that the stone wall is very hard, all granite, and the explosives they are equipped with are very limited.

To put it bluntly, it's just a bomb, and I don't know what the result will be if it blows up, but if it is blown in the wrong place, they really need to turn back.

And that's not the biggest problem, what they need to do now is to climb this stone wall, but where is there a shooting hole for air bullets on the stone wall, this is also a very unimaginable problem, if they don't find the shooting hole, it may bring fatal consequences, they may die because of it.

But to find the shooting holes, they undoubtedly need to climb up, so how do they find them? This requires them to use their wits.

According to Xia Qing's judgment, there should be only two possibilities for the triggering of the shooting hole mechanism, one is that the pressure triggers the shooting hole to open the first shot, and the other is that the airflow changes on the surface of the stone wall cause the shooting hole.

After discussion, they decided that there were indeed only these two possibilities.

The first one is simpler, to put it bluntly, someone climbs the stone wall, there is a downward pressure on the surface of the stone wall, if the person's hands and feet step on a certain mechanism on the stone wall, the shooting hole will be opened, and the compressed air inside will penetrate the target like a bullet.

And the second is a bit complicated, this is naturally the theory put forward by Xia Qing, because she does know some superb things they don't know, the second is called the airflow change on the surface of the stone wall, this simple explanation is that the surface of the stone wall is constantly bearing the airflow, the reason is that the whole stone wall is like a wall standing in the Great Xing'an Mountains, there will inevitably be air pressure attached to the surface, and if the craftsmanship of the ancients is strong enough, a very sensitive mechanism will be designed according to this situation, Only when someone is attached to the stone wall, that is, when there is a certain change in the air pressure on the surface of the stone wall, the mechanism will be activated, and then the shooting hole will be opened, which is more complex than the previous one, but more effective and impossible to prevent.

So in the end, they chose two options, one to test the pressure mechanism, the other to test the airflow change mechanism, and the tool to use as a test tool was the corpse of the argali, and the other was a propped up gari.

By the time they started to act, it was almost noon, and they were fully prepared, and began to be led by Gao Chao and Xia Qing, and slowly began to climb up.

As for Xinlan and Fatman, they are used as a protection mechanism below, and they can play a certain role in case someone has an accident.

Gao Chao and Xinlan cut the whole argali, which was usually made into food, and the other half was used to test the pressure mechanism that might appear in front of them, while Gao Chao held a stick in his hand, and the other end of the stick was tied with a rope to make a human-shaped support, and then a piece of clothing was worn on it, which was used to change the air flow on the stone wall in front of him, so that it was foolproof.

Despite this, their plan was still too slow, after all, Gao Chao and Xia Qing had to constantly analyze how to climb the rock, and then use the remaining half of the argali, and then use the remaining half of the argali, and the hanger to do experiments, and found that there was no danger, so that the two of them could continue to climb, in this way, it was really like clearing mines on the cliffs, which was very torturous and painful.

It was about two o'clock in the afternoon that they reached a position about ten meters high, and when Gao Chao was a little discouraged, Xia Qing suddenly said, "Old Gao, did you hear that?" ”