The content of the note makes Chen Xinli nervous and alert. He understands that this is obviously a big move of the police, and he is involuntarily involved in this matter.

Why Qin LAN and Ding Ning were given a month's leave before, and why their shelters were checked twice has also been explained.

Chen Xin doesn't reject cooperation with the police. It's also a good thing that Qin LAN and Ding Ning can protect him.

However, the two girls moved to live with him, even in order to protect him, it still formed a certain trouble for Chen Xin.

After all, it's two girls. They live here. It's a question where they sleep.

If only Qin LAN, it's easy to say, anyway, the two people have not lived together, which can't be regarded as a problem.

But Ding Ning and Chen Xin are just ordinary friends, and they don't even have a very good relationship, which obviously causes Chen Xin's distress and makes him think about giving them two places to live.

At least, arrange a separate room for dinning.

While thinking about this problem, Chen Xin went back to his refuge.

Since he knew that he might be in danger from Ding Ning, he was naturally concerned about the safety of the refuge.

After closing the gate, Chen Xin is also planning to improve some of the protection, such as upgrading the gate, improving the protection performance and adding a little defense weapons.

However, this can be postponed temporarily. Chen Xin still has to take the lead in solving the housing problems after Ding Ning and Qin LAN come.

In fact, this problem is not too difficult to solve. After all, in addition to the bedroom and living room, there is also a medical room. If you don't mind, you can sleep in the multifunctional operating chair. After all, the chair is a temporary operating table, which is the size of a train sleeper.

It's just that it's too simple. If Chen Xin has no other way, he can consider doing it. But when there are other ways to think about it, he still doesn't intend to do it.

Sitting in front of the workbench, opening the system interface and browsing the various materials in the warehouse, Chen Xin is thinking about making a high and low bed by himself.

In fact, it's not complicated to make a high-low bed, and the materials used are also simple. If it's the kind of iron frame bed in Chen Xin's university dormitory, it even requires only a few steel pipes to weld one.

Chen Xin looked at the materials in his warehouse. There are still a number of steel pipes, including angle steel, channel steel and I-beam. He wants to weld a high and low bed. Even if there is no system, Chen Xin can use these materials as long as he knows how to weld.

So Chen Xin did not hesitate. He pulled out two steel pipes from the storage room and cut them into four columns. Then he cut them with four angle steels and welded them into two rectangular frames. He connected the four columns to the top corners of the two rectangular frames. A high-low bed frame was finished.

A few beams are welded in the rectangular frame, and then the bed board is laid. This bed can sleep. The high and low bed in Chen Xin's college dormitory is such a thing. The quality may not be as solid as Chen Xin's own. After all, he has the impression that one of his overweight classmates collapsed the bed.

However, although the high and low bed was made, Chen Xin did not dare to use it to sleep for Qin LAN and Ding Ning. After all, it was too simple to have a bed board.

So after making the steel frame, Chen Xin found a composite board and a sheet iron from the warehouse as additional materials, and spent 20 survival points to upgrade the bed.

After upgrading, the high and low bed looks like a little bit. The four pillars have been thickened a lot, and the bed board has been added to the bed. Besides, there is a ladder for climbing up and down. It looks like that.

With a bed, the rest is easy.

After leaving the workbench and looking at his bedroom, Chen Xin opens the system interface again.

"Containerized composite house bedroom components"

"upgrade scheme 1: upgrade the box material, improve the thermal insulation performance, upgrade the temperature regulation and air circulation performance, life support level + 1, upgrade the required survival 3000"

"upgrade scheme 2: upgrade the internal soft decoration material, increase the smart home function, living comfort level + 1, the overall science and technology level + 1, upgrade the living environment" This is the data displayed by the system when Chen Xin checked the bedroom upgrade options before, but after Chen Xin found out how to use the system, now he can control the upgrade direction of the upgrade scheme.

So when he opens the bedroom upgrade interface again, the data displayed becomes:

"containerized combined house bedroom component"

"upgrade scheme 1: expand the living area, accommodate + 3 people, upgrade the box material, improve the thermal insulation performance, upgrade the temperature regulation and air circulation performance, life support level + 1, upgrade the required survival point 50 "Upgrade plan 2: living space + 1 (single living space can accommodate 2 people), upgrade internal soft decoration materials, increase smart home function, living comfort level + 1, overall technology level + 1, and upgrade the required survival point of 6500"The price has gone up, but the upgrade plan has obviously added something.

Seeing that the system upgrade plan has changed under his own will, Chen Xin immediately nods with satisfaction. As for the cost of the upgrade, the materials required for the two upgrade plans are in his storeroom, and the materials Chen Xin prepared for the overall upgrade refuge have a considerable degree of coverage, so Chen Xin can get the upgrade materials required for both plans.

Only in this way, about one fifth of his materials will be used up, which will undoubtedly have a great impact on his overall upgrade of the refuge.

However, at present, the materials for the overall upgrade haven't been put together. It seems that it's not impossible to misappropriate part of the materials to upgrade the urgently needed bedrooms. After all, we were going to get another batch of materials, but now misappropriation is nothing more than getting more materials.

After thinking about it, Chen Xin only chose the upgrade of scheme 2.

After putting in the materials, using the survival point, confirming the upgrade, the green light is still flashing. Everything is as simple as changing the theme style of the computer display interface. Just a refresh, it becomes different.

The high and low bed that Chen Xin made just now has disappeared from the side of the workbench, and a new door has appeared next to the original bedroom door of the living room.

When you open the door, you can see a bedroom with a sense of technology and a bit of future color. The simple style, white main tone and warm light source make the bedroom look not like a refuge in the end at all, but like a future residence in a science fiction movie.

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