One kind of unlimited supplies every day, I pushed through the doomsday

After solving the problem of vegetables, the next problem is the defense of the villa.

Some time ago, Chen Dong encountered a surprise attack, which made him feel a strong sense of crisis.

He planned to take this opportunity to upgrade the automatic defense armed system before the meteor shower came.

Fortunately, he had already obtained the [Laser Defense Device] and [Automated Gatling Gun].

These two things may not be useful to others for the time being.

But in Chen Dong's hands, it is just the icing on the cake.

These two things must first be adapted to the automatic defense armed system.

But at present, many survivors, even the police station, have not obtained them.

Chen Dong is unique.

Because upgrading the automatic defense armed system requires a one-day cooling-off period, Chen Dong has not upgraded it before.

After all, he kept going out to collect supplies to prevent the invasion of external survivors during this gap.

As a result, a survivor really invaded.

Although the automatic defense armed system did not enter the gap, it also made Chen Dong realize that the current automatic defense armed system is a bit outdated.

The survivors now have hot weapons in their hands like mushrooms after rain.

Pistols are already the most common weapons.

Faced with such a situation, Chen Dong's automatic defense armament system is still equipped with crossbows and muskets, which is really magical.

Moreover, Chen Dong found that even if there were foreign survivors invading, he was wearing combat uniforms, holding UMP9 submachine guns, and Xie Anqi and Tian Xiaoyu were assisting with pistols on the side, so it seemed that the automatic defense armament system's ineffective defense method would not be needed.

It must be upgraded!

This matter cannot be delayed any longer.

The group of survivors of Fox and Iron Arm were just wiped out by Chen Dong, and while the remaining power of deterrence is still there, it is just right to use it for upgrading.

Chen Dong clicked on the smart assistant of the shelter.

The shelter assistant equipped by the system emerged from Chen Dong's personal window, using a mechanized female voice, and asked crisply: "Dear master, is there anything I can help you with?"

Chen Dong clicked on the status bar of the barrier wall and clicked to add materials to upgrade.

[Is it necessary to inject materials to upgrade the barrier wall? 】

Chen Dong continued to click, and then added S alloy.

The system issued a prompt: "Dear master, S alloy is a special material. If you need to upgrade the barrier wall, you will need a lot of S alloy, and the upgrade may fail. Do you want to continue?"

Chen Dong clicked [Yes] without hesitation.

Materials required for upgrading the barrier wall:

S alloy (249/50)

Upgrade failed!

Chen Dong was stunned.

He looked at the red box popped up by the system, which showed that the barrier wall upgrade failed, and his backpack was also missing 50 pieces of S alloy.

"Hiss..."

Chen Dong took a breath.

He couldn't believe that he could fail to upgrade the barrier wall!

Chen Dong clicked on the shelter's smart assistant: "Assistant, what is the success rate of upgrading the barrier wall?"

The smart assistant immediately replied: "Dear master, I'm sorry that I can't publicize the upgrade success rate. If you fail, please try again."

Chen Dong gritted his teeth and cursed the system profiteer.

"You are amazing! S alloy materials are in such short supply, and you still made an upgrade failure, not to mention the success rate! Did you learn this trick from a certain penguin company?!"

The smart assistant did not reply.

After all, it is not really fully intelligent and can only reply to the set questions.

Chen Dong clicked the upgrade again, not convinced.

"I don't believe it. If it failed the first time, can it fail the second time? Come on, dad!"

[The upgrade of the barrier wall failed! ]

Chen Dong looked at the S alloy in his backpack, and one hundred pieces were missing.

This feeling is like a waste of money.

Nothing happened, but it has already happened.

Chen Dong pursed his lips.

Now, the S alloy in his hand can only support him to upgrade twice.

If the upgrade fails, it will really be a waste of money.

However, the barrier wall must be upgraded.

The current barrier wall is just a solid wall mixed with cement and steel.

Although it is hard, facing the meteorite shower, Chen Dong dare not guarantee whether it will be smashed.

Chen Dong gritted his teeth again.

"How can a gambler always lose!"

[The barrier wall has been upgraded successfully! The S alloy wall has been upgraded! ]

Success!

Chen Dong couldn't help but nod his head vigorously, cursed a few times, and then exhaled.

"Never gamble again."

The upgrade of the S alloy wall was completed. The original barrier wall was covered with S alloy inside and outside. It was not ostentatious under the sunlight, but absorbed the light without changing the original matte silver texture.

Fortunately, everything was worth it.

Chen Dong could only comfort himself in his heart.

Afterwards, he asked the smart assistant: "Assistant, will there be a chance of failure in the future upgrade of S alloy equipment?"

The smart assistant still had that gentle mechanical female voice, saying: "Dear master, the S alloy upgrade equipment will not fail. The reason why the barrier wall fails is because the resource consumption is huge, so there is a chance of failure. Of course, you can also upgrade through the guaranteed upgrade."

Chen Dong was confused.

I haven't heard of guaranteed upgrades before.

"What is the guaranteed upgrade?"

Then, the smart assistant listed the guaranteed materials for the upgrade of the barrier wall.

Chen Dong exclaimed that it was a good job.

The guaranteed upgrade of the barrier wall only required 120 S alloys.

And he spent 150 S alloys to successfully upgrade.

He lost so much that he couldn't even recognize the way home.

Chen Dong, who knew that he was cheated by the system, could do nothing about it.

"Okay, I know, you go away."

Intelligent assistant: "Okay, master."

Chen Dong adjusted his frustrated state, and then continued to upgrade the automatic defense armed system.

Compared with the barrier wall, this upgrade is much easier.

Chen Dong clicked on the panel of the automatic defense armed system and clicked the upgrade button.

[Do you want to upgrade the automatic defense armed system? ]

[Yes]

[Please put the automatic defense armed system upgrade equipment]

An add panel popped up in the upgrade window, and a lot of equipment can be seen on it.

All of them can be used in this upgrade.

Chen Dong took a quick look at the equipment that would have the opportunity to continue to upgrade the automatic defense armed system in the future, and his heart was burning.

If all these various equipment were equipped and upgraded on the automatic defense armed system, it would really be considered as impregnable.

Chen Dong found the [Laser Defense Device] and [Automated Gatling Gun], and clicked to add these two pieces of equipment he already had.

Upgrade!

[Automatic defense weapon system upgraded successfully! Cooling period countdown: 23:59:59! ]