After nearly a month of getting along, Xiao Zhan did not discover anything unusual about "Xiao Yan".

Xiao Zhan could only continue to observe in secret.

"'Xiaoyan', I want to build the refuge into a highly concealed war fortress with both offensive and defensive capabilities. How much energy is needed?"

Xiaoyan: [According to the existing equipment system in the arsenal, you first need to spend 1 energy point to exchange for a transformation blueprint, and then spend 10 energy points for transformation control! 】

When Xiao Zhan heard this, the corners of his eyes and mouth twitched involuntarily, and he asked in dissatisfaction:

"'Xiaoyan', did you do it on purpose? Huh? Do you know that I have 11 energy points? Shouldn't it be so dark?"

Xiaoyan: [Do you spend a little energy value in exchange for the transformation drawing of the war fortress? 】

Xiao Zhan nodded, "Okay, you do, don't you want to pick me up?"

After a pause, Xiao Zhan finally said helplessly after seeing "Xiao Yan" not responding:

"Yes!"

An electronic drawing appeared in Xiao Zhan's mind.

First of all, the drawing is based on Xiao Zhan's offensive and defensive requirements, plus the requirements of strong concealment. Add a layer of 15 cm thick anthrax and titanium alloy high-strength steel plate to the inner and outer parts of the reinforced concrete of the entire refuge, and also change the material of the gate. Replaced with this kind of alloy material, of course, if the equivalent amount of gold is added to it, the defense ability can be increased by 50%.

After the modification, it can defend against the missile's wall detonation attack.

In the high corner between the two giant steel gates, four machine guns were set up to automatically launch and hang up.

There are also four more concealed and sealable shooting ports above the two giant steel doors.

In the refuge, in order to prevent an enemy from entering, a laser defense device is installed, and a small bunker room can be used as a counter fortress.

And also set up eight concealed and liftable machine gun fortresses 500 meters away from the periphery of the refuge!

And within a radius of five miles, two hundred and thirteen landmine burial points have been set up.

At the ceiling of the refuge, an external sniper port is extended upwards, which is convenient for shooting and killing the enemy's head at a long distance.

Two sets of individual anti-tank missiles are displayed in the tunnel.

There are also two vertical silos and a hidden vacant platform that can be raised and lowered.

As shown in the drawing, a 360-degree rotatable turret with no dead angles is set up on the top of the low mountain 100 meters away from the shelter roof of the refuge.

In order to clearly know the strength and performance of the war fortress he built, Xiao Zhan called up the weapon configuration of each position shown in the blueprint in his mind in his notebook, and checked the information one by one.

There is nothing to say about defense improvements.

The first is the machine gun erected in the upper four corners of the steel giant gate. The weapon choice given on the drawing is the Ultimax101 light machine gun.

Xiao Zhan checked the performance of the Ultimax101 light machine gun. It has a 5.56 caliber and 100 rounds of ammunition. It can be switched between single-shot and three-shot...

Xiao Zhan nodded with satisfaction. Most of the enemies who need to be killed between these two giant steel gates are trapped here, so the four towers are set at an altitude of nine meters and have the firepower of a light machine gun with a full ammunition capacity. Is enough.

In the refuge, each floor is equipped with a miniature radio laser cutting device according to the drawings. The defensive net formed by this cutting laser can easily cut steel plates up to one centimeter thick into pieces!

Among the eight hidden bunkers with liftable machine guns on the outside, the drawing is an XM214 six-barreled rotating gun with a rate of fire of up to 3000 rounds per minute.

Xiao Zhan's eyes lit up. This is a real killer, with high firepower!

Below is the remote-controlled X-57A infantry mine designated on the drawing, with a kill radius of 100-150 meters.

"This is a weapon to deal with intensive charges!"

Xiao Zhan murmured.

Then there is the newly expanded sniper room, which is equipped with the Barrett LightFiftyM82A1 sniper rifle.

Xiao Zhan nodded in satisfaction. He once recharged and bought this very powerful sniper rifle while playing a certain game. It feels very good!

When Xiao Zhan focused his attention on the two vertical launch shafts and the vacant platform, he couldn't help but open his mouth.

Inside the two vertical shafts are two Hongqi-9 surface-to-air interceptor missiles, and above the empty platform is a set of small fire control radar positioning devices.

This... is a bit ruthless, right?

And when Xiao Zhan finally moved his gaze to the 360-degree fort with no dead ends, he immediately fell in love.

The 1131 near-defense rapid-fire cannon was installed on the fort that I bought it!

The 1131 near-defense rapid-fire machine gun is a ship-based gun developed by Longguo, with 11 barrels of 30MM Gatling rapid-fire gun, equipped with 11 barrels and 2 bomb bays.

More than 60 targets can be locked at one time. The maximum firepower is 12,000 rounds per minute, that is, 200 rounds per second. The dense barrage it shoots can instantly destroy incoming missiles, and its firepower is fierce.

Xiao Zhan couldn't help but stick out his tongue while looking at the introduction. "This Nima is too ruthless. It can shoot 12,000 rounds of 30mm bullets in one minute, and with the help of the fire control system, it can also be used at the same time. Target more than 60 targets!"

This... baby, hide above your refuge, rise up at the critical moment, and spray flames frantically at the enemy, I just want to know who else?

This is simply a huge meat grinder, a killing machine!

As long as the ammunition is sufficient, I will take care of your thousands of troops, missiles, heavy artillery, all torn to pieces!

Xiao Zhan's saliva almost flowed out.

He firmly believes that as long as his refuge is transformed according to the drawings, this refuge will become a veritable war fortress~lightnovelpub.net~ Come to three to five hundred people, come to an airplane, tank or something, and deal with it yourself. It's not too easy.

Now Xiao Zhan is most concerned about the issue of ammunition. After checking the number of ammunition, he found that it was really the last 1131 near-defense rapid-fire cannon that made him a little bit painful.

Because there are only 12,000 rounds of ammunition for the 1131 near-defense rapid-fire cannon, which means that it is only enough for the cannon to vent for one minute.

Xiao Zhan asked Xiaoyan twice with "tsk tsk":

"'Xiaoyan', I remember you said last time that you don't need energy points to make bullets, right?"

Xiaoyan: [Yes! 】

"Then look at this type of bullet, can you do it?"

Xiaoyan: [It can be done, but I want to remind you that this 1131 close-defense rapid-fire machine gun needs to cool down every minute it fires, otherwise the barrel will be scrapped! 】

Xiao Zhan frowned and asked:

"Is there any way to improve?"

Xiao Yan: [You can spend 2 energy points and use gold and jade essence as materials to improve it. After the improvement, you can shoot continuously for 60 minutes! 】

Xiao Zhanyi grinned:

"Then let's forget it for the time being, let's talk about it when it's really useful, anyway, you can complete the transformation in a very short time!"

After gritting his teeth, Xiao Zhan finally said:

"'Xiaoyan', transform and arrange the refuge according to the drawings of the war fortress!"

Xiaoyan: [It takes 10 energy points, do you want to continue? 】

Xiao Zhandao:

"continue!"

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