This bedroom is an upgraded and expanded room, and it is the same size as Chen Xin's original bedroom, with a white bunk bed against the wall, and the bed is covered with clean white sheets and a brown blanket, which looks very neat and tidy, and people can't bear to mess with it.

This is an upgraded version of the high and low bed made by Chen Xin before, and the material is obviously not a steel pipe, but a material with a little metallic texture to the touch, and the shape is more like what will appear in science fiction works.

In addition to the bed, there is a desk and a small round table, the desk and the bed are at one end of the room, leaning against the two corners, and the small round table is placed at the other end of the room, next to which there is an oxygen tank that can be planted with green plants.

This is the equipment that Chen Xin added after adding an oxygen concentrator in the warehouse as an upgrade material, which can plant plants in the box to provide more oxygen for the bedroom.

But now the oxygen tank is still empty, and it is clear that the seeds are to be added additionally.

Looking at this empty planting box, Chen Xin planned to go back and transplant some of the herbs that he promised Hongrui to plant, and at the same time increase oxygen, he could also use the natural aroma of vanilla to increase the effect of calming the mind.

In addition to this, there is also a white radiator under the wall where there is a desk, which is connected to a ground source heat pump to provide enough warmth for the bedroom, even after the upgrade, the insulation of the bedroom is enough to ensure that it is very comfortable inside.

The light in the room comes from two light strips on the ceiling, and the unobtrusive, warm light adds a sense of warmth to the room and makes the bedroom feel more comfortable.

As for the two wardrobes at the foot of the bed and in the other corner, they are lackluster, just ordinary wardrobes.

However, the material of the wall made Chen Xin a little concerned, and when he reached out and touched it, it felt like plastic steel, and the texture of the surface frosted would not reflect strongly, and it felt very comfortable.

After inspecting the room and testing the smart home and temperature regulation functions mentioned in the system upgrade plan, Chen Xin also understood where the technology level +1 and life support level +1 were reflected.

At the door of the room, there is a device similar to a touch screen on the wall, which can be set up after opening, and then it will intelligently adjust the light, temperature, ventilation and other aspects of the room according to the settings, monitor the air humidity of the indoor environment, physical comfort and other data, and even play music.

There are also a few chairs in the room, one is a back chair in front of the desk, and the other three are low sofas in front of the small round table.

Experiencing the comfort of the room upgrade, Chen Xin felt extremely satisfied with this, and deeply felt that the survival points and resources he spent were not in vain, and his quality of life was really improved.

However, after inspecting the bedroom that was to be used as a guest room, Chen Xin also had to check his bedroom.

After all, Chen Xin put a lot of things in his bedroom? That tech level +1 entry is something he covets? He was eager to see if anything he had placed in his bedroom could be covered by this property.

However, when he returned to his room, he couldn't help but show a disappointed expression? Weapons cabinets, laptops? The two items he was most looking forward to weren't upgraded.

The whole room was like a replica of the next room, except for an extra weapons cabinet and workbench next to the desk.

All of Chen Xin's personal belongings are still placed as they are? Even the wine under the bed was put into the upgraded drawer under the bed.

Looking at all this, although Chen Xin was a little disappointed, he was not dissatisfied? After all, this is nothing more than an upgrade he was expecting? But these things can't be strictly classified as bedrooms.

No longer bothering about this matter, Chen Xin sat down in front of the weapon workbench and decided to make a few defensive weapons and add them when upgrading the gate? Increases the defense of the gate.

The bow and crossbow were excluded from the selection of defensive weapons by Chen Xin.

It's not that the bow and crossbow are not easy to use? The heavy crossbow he had in the hallway was terrifying, and if someone were standing in the doorway and being shot, it would be no less powerful than being shot from a large-caliber anti-materiel sniper rifle at close range.

The key problem is that the bow arm and string of the bow have high requirements for the material, and in the low temperature and cold environment, it will have a serious impact on the service life of the bow and crossbow.

Although the weapon cabinet has the property of the weapon to be maintained, but so far? Chen Xindu hadn't used this function yet, and he wasn't sure if the damage of the bow and crossbow in the cold environment could be repaired.

So what Chen Xin plans to do is still a gun.

Although the system drawing on the workbench is only a pistol drawing? But in terms of structure, the principle of firearms is the same? It's not impossible to modify a pistol to create a more powerful firearm.

And no matter how bad it is? Make a pistol? And then it is not impossible to upgrade to a miniature submachine gun.

What's more, Chen Xin's computer has all kinds of information? Among them, there are also firearm drawings, from the most old-fashioned flintlock pistols to Mauser rifles and Lee Enfield rifles that fought in World War I and World War II, although these weapons are all invented dozens or even hundreds of years ago, but no one says that ancient weapons can't kill people, and swords have been used by humans for thousands of years, isn't it still a killing weapon today?

At the beginning, Chen Xin's collection of these drawings was just to accumulate writing materials, and it was also a personal hobby, but I have to say that these drawings are a valuable asset for him now, and they have also helped a lot.

Chen Xin didn't plan to make rifles, as for the pistol, he didn't bother to turn over the system drawings, he still wanted to make machine guns.

After all, although the old Maxim machine gun was the world's first truly successful gunpowder automatic weapon, it killed 60,000 people in a single day in the Battle of the Somme in World War I, and it was still used in the Yan Kingdom until the seventies of the last century, although only to equip the militia troops.

If a Maxim machine gun was set up in the observation room above the gate of the shelter that could cover the entire gate, Chen Xin felt that even if a force really attacked his shelter, it would not be able to enter without heavy weapons.

As for the drawings of the Makqin machine gun, the drawings of this weapon that have been used for more than 100 years are really easy to find, and the drawings of its derivative models are also a lot.

Now he's just making it.