Build a doomsday base, starting from the infinite supermarket.

"System, why do you think this is happening?"

"Hmm? What are you asking, host? Why?" the system asked in confusion.

It had just found a novel of a type it had never read before and was so engrossed in reading it that it didn't pay attention to what was happening on Song Zhi's side.

"I mean, the temperature inside the base is different from before. Didn't you say before that all places with system buildings are controlled by the system? Did you get lazy and forget to adjust the temperature?"

Song Zhi thought about it and only thought of this possibility.

Anyway, it's not her problem, so it can only be something the system did.

"No, no, no, I didn't."

After the system listened carefully to what Song Zhi said, it suddenly became anxious.

It's fine, but it doesn't want to take the blame for this.

Song Zhi narrowed his eyes, looked forward with a smile, exuding a dangerous aura.

"Host, you really have wronged me." The system quickly thought of an explanation in its mind and told Song Zhi bit by bit.

"Yeah." Song Zhi responded and signaled the system to continue.

"Host, the weather was hot a while ago. It was just hot. It was cool inside the base. In fact, there is an invisible air conditioner installed on the outer wall of the building, blowing air outside 24 hours a day."

"But it's different now. Not only is it very windy outside, but there's also a lot of condensation in the air. The air conditioner can't operate normally, so it feels very cold."

The system explained aggrievedly, saying that it was also its fault for not explaining it clearly before, which led to the host's misunderstanding.

"So the difference in temperature between the base and outside is purely due to the installation of air conditioners? The super-powerful ones?"

Song Zhi couldn't believe it. It was completely different from what she had thought before.

"Yes host."

“……”Song Zhi was speechless.

She previously thought that there was a special protective shield inside the base that could block any interference from the outside world.

"Then why can zombies defend in all aspects, but rain and other things can't? Aren't they all interferences from the outside world?"

Song Zhi suddenly thought of zombies. The base’s defense against zombies was absolute.

If objects as big as zombies can be kept out, then why can't rain and wind?

"They are different hosts. Rain and other things come from nature and have no life. Zombies are scary, but at least they are alive..."

Seeing that Song Zhi was not clear about the difference between the two, the system started talking a lot to Song Zhi.

Song Zhi listened attentively at the beginning, but later he yawned and then squinted his eyes due to tiredness.

There are so many, and it’s so complicated. If I had known this, I wouldn’t have asked. If you can’t resist it, you can’t resist it. The wind and rain won’t kill you.

The system continued talking for ten minutes and finally ended when Song Zhi was about to fall asleep.

"Host, this is the specific reason. If you want to know more details, I may ask you to cooperate with me to draw a diagram, otherwise you may not understand."

It was a rare opportunity to talk about the area in which he was good at. The system became more and more excited as it spoke, and it seemed as if it wanted to drag Song Zhi along and talk until dawn.

But Song Zhi was already tired.

"No, stop it. I understand. No need to explain it in more detail."

Besides, she really wanted to fall asleep directly.

The system glanced at Song Zhi with a suspicious tone.

"Really? Host. From your look, it seems that you didn't understand. Don't worry, as a system, we must have the determination and attitude to serve the master. Just ask, I will do my best to answer your questions."

"No, really, that's not necessary." Song Zhi shook his head and waved his hands, refusing again.

The system didn't believe it, and after some back and forth with Song Zhi, it finally believed it and was no longer obsessed with answering this question for Song Zhi.

Song Zhi sat on the sofa and thought quietly for a while.

Suddenly, she thought of something.

Nano air defense shield.

In her previous life, the base where she worked focused on developing this in order to resist the erosion of poisonous rain.

An extremely invisible transparent cover covers the entire base. No matter how strong the wind and rain are outside, it will not have any impact on the base inside.

Moreover, the material used to make this cover is extremely tough, and it can provide some protection even if it is attacked by some thermal weapons.

The nano air defense shield is good in every way except for one thing: research on it requires huge financial and material resources. After it is developed and put into use, it will also cost a huge amount of money and maintenance costs.

When this shield was first developed, the entire base was so poor that they couldn't even take out a crystal core, and all of them were thrown inside.

Fortunately, the final result is good and does not disappoint its extremely difficult birth process.

Song Zhi suddenly thought of the nano air defense shield that he had developed in his previous life. He wondered if this kind of thing was sold in the system.

If so, the current situation of the base would be resolved.

"By the way, system, do you have any nano air defense shields for sale? The kind that, after being deployed, can resist wind and rain, and also resist some weapon attacks."

A building can be built easily, so I believe this cover can be built easily too.

"Nano air defense shield?"

"Yes, or maybe it shouldn't be called that. It's used to protect the sky."

"Hmm..." The system thought hard and searched back and forth in the system mall.

Finally, half a minute later, it found what Song Zhi wanted.

"Is this it, host? It has been shown to you."

As soon as the system finished speaking, a product automatically appeared on the system mall panel in front of Song Zhi.

"Product name: Base air defense cover."

"Product material: unknown, but it can stop anything!"

“Product review: An indispensable part of building a super base. The sooner you own it, the sooner you can enjoy it. Those who have used it all say it’s good.”

Song Zhi looked at them line by line and was very sure that this was what she wanted.

With this, the construction of the base has been taken to the next level.

This base will be the world's invincible doomsday base in the future. Let's see what kind of danger can get in!

Song Zhi was so excited that he almost jumped off the sofa.

You can just buy it with your wealth in the system mall, which saves a lot of research and construction costs.

Scanning the lines one by one, Song Zhi became more and more satisfied. He placed an order excitedly as soon as he saw the price...Ah?

Song Zhi couldn't hold it in and almost shouted out.

What the hell, you dare to ask for such a price?

The last line of the product description clearly states the price of the product.

"Product price: 1000000 wealth points + 10 second-level crystal cores (no limit on the type of crystal core~)."

There’s even a tilde after that “oh.”

Song Zhi feels that this labeling may be to highlight the humane nature of its pricing and relax the conditions a little bit.

But does it really think that such labeling is humane?

Obviously the string of numbers at the front is the key point!