Doomsday Bunker Upgrade

The two double-mounted Maxim machine guns have been installed, and the door looks thicker and stronger after the upgrade.

In particular, the structure of the gate has changed from a push-pull type to a lift type. The entire gate has been completely embedded in the wall. If you want to open it without lowering the gate, you have to blow up the entire wall.

The gate originally made of reinforced concrete wrapped with ordinary steel plate has also been upgraded to a solid heat-treated homogeneous nickel-chromium alloy steel plate with a thickness of 30cm.

During World War II, Japan used this material as the main armor of Yamato-class battleships, and stacked its thickness to an insane 650mm.

At that time, the armor of the Yamato-class main gun was as thick as 650mm, which was impossible for any artillery at that time to penetrate it in the immune zone.

In fact, the Federation found such a steel plate after the war. In order to test the performance of this steel plate, they used the 410 main gun of the Missouri-class battleship to carry out zero-angle shelling at a distance of 300 meters before breaking down such a steel plate.

However, it is almost a century ago technology, and now nickel alloy steel has become a common steel that can be bought in the steel market, and the price is low.

Among the materials that Chen Xin had collected before, there were such a batch of nickel alloy steel columns, which were sold as raw materials for metal processing.

In Chen Xin's original plan, in addition to reinforcing the gate, these materials would also be used for structural reinforcement inside the shelter.

Of course, in Chen Xin's original plan, he did not intend to make the gate a solid metal door with a thickness of 30cm, and use a few centimeters of steel plates to make a hollow structure, and the inside is still reinforced concrete.

But after Ding Ning gave him the note, the inexplicable sense of crisis made Chen Xin choose to turn the gate into solid metal, even though it nearly doubled the survival points he spent on upgrading.

Although Chen Xin's gate now does not have the exaggerated thickness of the main gun armor of the Yamato-class battleship, his enemy also does not have the main gun of the battleship.

As for the use of explosives, it cannot affect such thick armor. Otherwise, there is no need to use armor-piercing bullets to effectively penetrate the armor of battleships.

Looking at the gate that he can only describe as sturdy, Chen Xin couldn't help scratching his head while feeling incomparably reassured. Now the defensive power of the gate is sufficient, but the wall is not as strong as the gate.

But there is no need to worry too much about this issue. After all, under his refuge, there is a mountain more than 200 meters high above his head. The thickness of the thick soil layer will not be much worse than that of metal after freezing. If you want to dig the permafrost layer, Relying on manpower is definitely not going to work.

So now as long as Chen Xin doesn't open the door, no one will want to enter his shelter.

The hydraulic lift structure of the gate ensures the reliability of the gate, but if there is no electricity, it is a bit confusing to open the gate.

Fortunately, the hydraulic mechanism of the gate lift column has an emergency door opening device. If necessary, the liquid inside can be directly released, so that the lift column falls instantly and the gate is opened.

But this is a one-time emergency measure, and it can only be used at the most critical moment or when it is necessary, because once this is done, the door will be opened and closed again.

With such a solid and reliable gate, and with Mark Qin installed on the gate as a defensive weapon, Chen Xin was completely assured of his own safety.

Back inside the shelter, and sitting on the sofa in the living room, Chen Xin had enough time to think about the ins and outs of the whole thing.

First of all, the beginning of the incident should be the attack on Refuge No. 2 in Baling County, which is the mission in which Qin Lan was injured.

Because the terrorists who attacked the shelter used suicide attacks in this incident, causing more than 20 casualties, which attracted the attention of the city government, and an investigation team was established to investigate. A touch row is also at that time.

Subsequently, the provincial government, which received the notification from the city government, was also shocked by this incident, so a special investigation team was sent from the provincial capital Xingcheng to the city, and a joint investigation team was formed with the investigation team of the city, and then launched the first investigation team. Second touch.

According to Qin Lan, it is very likely that the city government grasped important clues during the first survey of the platoon, and determined that the terrorist who caused the attack was in the area where Chen Xin's house was located, so Chen's platoon was still in the second survey. New home included.

But there is a doubt in this, because Qin Lan was injured, Ding Ning was sent to take care of her, and the two were put on leave for a month. This happened after the attack and before the city government set up an investigation team to conduct investigations.

"Did Uncle Ding and the SWAT team know in advance that this matter has something to do with me here?" Chen Xin rubbed his chin, always feeling that something was wrong here.

Logically speaking, even if Uncle Ding wanted to let Ding Ning and Qin Lan protect him, he would have made such a decision only after the first platoon and after confirming that the terrorists were in his area.

But Uncle Ding gave Qin Lan and Ding Ning a month off from the beginning, as if he knew what would happen in advance, and then deliberately found a reason for Ding Ning and Qin Lan to leave.

As for the note that Ding Ning gave him before, Chen Xin felt that this note was quite normal. After all, this is the second time the platoon has ended. If there is any action to be arranged, there should be enough clues and information.

It's just that Uncle Ding has always loved Ding Ning. In order to prevent Ding Ning from being in danger, he simply gave her a holiday and let her go to Mo Qingyan's place before the disaster...

Chen Xin thought of taking a holiday, and suddenly got inspiration and connected several things.

Before the attack, Uncle Ding, as the captain of the SWAT team, may have received intelligence or clues from some channels, but he did not know the time and place of the attack, or that the attack would cause such a large number of casualties.

So at this time, whether Ding Ning or Qin Lan, they are all working as usual.

With the time of the attack, Qin Lan was injured, more than 20 police officers of the SWAT team and the armed police were injured or sacrificed, and things suddenly became worse.

Therefore, at this time, Uncle Ding used Qin Lan's injury as an excuse to send Ding Ning to take care of her, and directly gave them a month's leave, probably intending to keep them in a relatively safe place like the hospital.

That's why Ding Ning didn't give himself the note at first, and didn't say anything about moving in with Qin Lan for a while.

But as the two investigations unfolded, it was obvious that something happened in the middle that Chen Xin didn't know about, which caused things to change.

Ding Ning's note was handed over to him at this stage. Obviously, Uncle Ding's original arrangement had changed.

This may be a sign that the joint investigation team is going to carry out a major operation. Otherwise, Uncle Ding would not be able to put his daughter here. This is likely to be a refuge within the scope of terrorist activities.

But that's not necessarily true. Chen Xin tapped his knees with his fingers. After straightening things out, his thoughts became much clearer, and he also had a new judgment.

What he analyzed just now were the thoughts of the police and the joint investigation team, but if he put his perspective on these terrorists, Chen Xin felt that they might not come to his shelter.

Because terrorists are crazy, but they are not lunatics. Since they can attack official shelters and make suicide attacks at the cost of more than a dozen lives, they must have their own goals.

Whatever the goal, suicide attacks are likely to be just the beginning, because a dozen or so highly trained individuals who dare to carry out suicide attacks are also very valuable to terrorist organizations and cannot be wasted so innocently.

So the first attack they made was likely to attract the attention of the police and the city.

Assuming that their goals are achieved, the attention of the city government and the police has now been drawn to Baling County, which means that the city government and the police pay less attention to the urban area. If you want to launch the next attack, where will you choose?

Chen Xin felt that the answer was already obvious.

Thinking of this, he couldn't help but be a little worried about his friends in the city, especially Mo Qingyan and Mo Qingxin. The two of them lacked a strong enough defense, and the two of them had no resistance. If something happened, the two of them There's really no ability to cope.

Why don't the two of them come to him for a while to escape for a while?

Chen Xin considered this idea, but hesitated.

On the one hand, the sisters of the Mo family might not be willing to come, and on the other hand, it would be very embarrassing for him if he had to live with five people and four of them were girls.

However, considering the possible dangers, Chen Xin felt that after Qin Lan and Ding Ning came, discuss with them before making a decision.

Just so, where to live...

Chen Xin couldn't help scratching his head, and finally upgraded the bedroom, but did he still have to sleep on the sofa?

But this is another story. Now Chen Xin feels that he should make preparations for Ding Ning and Qin Lan to come and live there. After all, they are two girls, and some things still need to be prepared.

This inevitably made Chen Xin feel in trouble, but the arrival of Ding Ning and Qin Lan can't be said to be no good. At least these are two people who can work. Although they only live temporarily, they can help themselves to some extent. matter.

At least there are a lot of things in the planting greenhouse now that someone helps, Chen Xin no longer has to work from morning to night by himself.

And there are other people in the shelter, and it can be a lot of fun. Some people chat with you, and you can play games together during the rest time at night.

To be honest, it's good to play games alone, but it's more fun to play with someone.

Thinking of this, Chen Xin couldn't help but look forward to the arrival of Qin Lan and Ding Ning.

Anti-bar fine, the current market price of nickel complex alloy is 198 per kilogram, starting from ten kilograms