Originally, the passage connecting the main part of the new evacuation center and the entrance part was a 50-meter-long corridor with an upward slope, which was built to facilitate the entry and exit of cars parked inside the evacuation center, but in fact, this corridor was not as convenient to use as originally expected.

Because the length is only 50 meters, but the height difference from the entrance to the inside of the shelter is nearly 20 meters, so this ramp is actually very steep, and it is not very convenient to drive in and out or even haul supplies with a small cart.

However, when the shelter was built at that time, Chen Xin only considered building the shelter a little deeper to avoid possible meteorite impacts affecting the shelter, and wanted to use the soil layer more than 200 meters thick above the shelter as protection, so he did not bother too much about the details.

After all, it's just that the slope is relatively large, and it's not very convenient to use, so it's not completely unusable.

However, now that it can be upgraded with the system, Chen Xin has naturally adjusted the place, changing the original diagonally connected corridor into two horizontal passages, and using elevators to go up and down in the middle.

This is also one of the reasons why Chen Xin has to wait until the materials from the city government are delivered before starting to upgrade the overall shelter, the materials of the elevator are collected by the help of the city government, and Chen Xin originally planned to process them himself.

After the upgrade, the elevator area can park an ordinary family car, the whole is a diameter of seven meters, three meters five high cylindrical car, the bottom of the car can be rotated, so as to solve the problem that the vehicle can not turn around when entering and exiting the passage because of narrowness.

Take the elevator to the upper floor, and after passing through the passage, it is still the original maintenance room, but on the other side of the maintenance room there is an additional material storage warehouse.

This is an adjustment made by Chen Xin because of the inconvenience of the delivery of materials before, and the material warehouse is placed on the upper floor where the entrance is located, and only the food storage room is kept inside the shelter.

In this way, the materials can be transported in from the door and stored directly, without the need to havoc to carry them down.

Anyway, for Chen Xin, where the materials are placed is almost the same, he only needs to open the system interface to use the materials, and he doesn't need to take them personally.

Passing through the training room, there is still the passage where the heavy crossbow is placed.

Chen Xin didn't make any major changes here, after all, it was just a channel, and the attack ability of the heavy crossbow was enough.

The only thing he tweaked was the trigger of the heavy crossbow, changing it from the original flap mechanism to an infrared-sensing automatic fire, and setting up a hidden mechanism to hide the entire heavy crossbow in the ceiling.

Anyone who walked through the corridor with the alarm turned on would be directly blinded by a series of heavy crossbows of ninety rounds a minute, and the power would be no worse than the heavy machine gun that Chen Xin had installed at the gate.

As for the way to open the alarm, Chen Xin set it up to open it from the inside and trigger the attack through face recognition.

That is, every time you come out of the inside, you can turn on the alarm switch from the inside to turn on face recognition, and in this case, through face recognition, you can naturally enter the inside of the shelter.

However, if a stranger enters without facial recognition, the heavy crossbow on the ceiling will be activated, and you can enjoy the thrill of dodging the heavy crossbow fire.

As for coming out through the safe passage, Chen Xin did not make any changes to the decontamination room, but only upgraded the decontamination equipment inside.

The exterior of the washroom is still a garage and a space that can be called an entrance hall or hallway.

It's an L-shaped space, with the short side connecting the gate and the washroom, and the long side being an extended garage for Chen Xinmo's modified armored RV.

There is nothing to say about the garage and the entrance, the garage just adds the function of vehicle maintenance, and adds some car repair tools, and the entrance is just an open space.

The real highlight is the door to the refuge.

It is still the previous lifting metal armor door, but Chen Xin changed it from homogeneous armor to multi-layer composite armor this time, and the thickness has increased from 30cm to 35cm, although the thickness has only increased by 5cm, but the defensive performance is already equivalent to 120cm thick homogeneous metal armor.

The original twin-mounted Makqin at the door has also been replaced with a twin-mounted 12.7mm three-barreled rotary tube machine gun, which is the same type as Chen Xin's armored RV, which can still be controlled by computer and automatically locked aiming.

Of course, you can still do hand exercises like Chen Xin did yesterday, experience 3,600 turns of one breath, and live the mercy of the world with great compassion.

After inspecting the entire shelter, Chen Xin was very satisfied with the overall upgrade effect, in addition to the overall layout and the improvement of the technology level, even the original gray cement wall of the shelter was covered with paint, and a metal support frame was added, which looked much cleaner and spacious.

Even the lighting facilities, which were originally just light bulbs, have been replaced with LED tubes, which softens the light inside the shelter a lot, and adds the lighting control that Chen Xin has always been thinking about, which can adjust the lighting with the change of time, so that the people inside the shelter can also feel the passage of time.

As for Chen Xin's observation room, which was originally set up above the gate, it has also been adjusted and upgraded this time, allowing it to evolve from a simple tree antenna room to a formal bunker, not only adding some living facilities inside, but also adding a double-layer vacuum glass to the observation port to block the cold air from entering.

Of course, in order to preserve the defensive function of the observation room, the glass of the observation port can be opened to turn it back into a shooting hole.

As for the vents connected to the exterior walls, Chen Xin has not made major changes, but has added ventilation fans and air filters to the inside of the ventilation ducts to improve the efficiency of air exchange.

Back inside the shelter, Qin Lan was still sitting on the sofa playing games, Chen Xin's previous treatment seemed to have no effect on her, although the living room she was in had completely changed, the game console had been upgraded from PS4 to PS5, and even the size of the TV had been enlarged a lot.

"Done?" Qin Lan watched as Chen Xin picked up another controller that was placed aside and connected to the game, and also pressed pause, cutting out the game and turning it into a two-player mode.

Chen Xin sat down, nodded and said, "I don't have much work left, as long as the materials are in place, it will be done quickly, and now it is all done." ”

"It's good to get it done, come and play a game with me, you lost to me last time, now give you a chance to beat me!" Qin Lan looked at Chen Xin and deliberately used the agitation method on him.

Chen Xin also smiled freely, held the handle and said, "That's me letting you!" ”

"Hehe, who let who maybe!" Qin Lan was obviously not convinced, and launched a provocation at Chen Xin: "Then do you want to make a bet?" ”

"Okay, bet on what?" Chen Xin happily responded, although the PS5 was launched before the disaster, he has not tried this latest model: "If you lose, you can't afford to pay your bills!" ”

Qin Lan bit her lip, thought about it before making up her mind and said, "The one who loses is down there at night!" ”

"Down there? Didn't you sleep in the lower bunk? What's going on ......" Chen Xin reacted, and the expression on his face suddenly became meaningful: "Bet so much? Then I'm going to use 120% of my strength! ”

Qin Lan's face was already full of shame at this time, but she still said very recklessly: "Hmph! Anyway, I won't lose if I win or lose, see how you die! ”

As he spoke, he gave Chen Xin a provocative look, and started the game directly.

Chen Xin smiled, and became equally serious, it is about the dignity of men, this kind of thing cannot be lost, although losing is actually nothing for Chen Xin.

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Winning or losing is not listed for the time being, how to settle this kind of thing between the two is not an outsider, anyway, when Chen Xin woke up the next morning, Qin Lan was lying in his arms.

Carefully pulling out his arm, Chen Xin got up lightly from the bed and got dressed, in order to avoid waking Qin Lan to go to the bathroom in the other room to wash up, then came to the upgraded new kitchen and began to prepare breakfast.

However, Qin Lan didn't sleep very hard, and the lack of pillow people around her still made her wake up quickly.

Qin Lan, who was only wrapped in a blanket, came to the living room, looked at Chen Xin who was busy in the kitchen, and did not disturb him, but leaned against the kitchen door.

The upgraded heating system provided a warm enough environment inside the shelter that even if Qin Lan was only wrapped in a blanket, he didn't feel cold, but watched Chen Xin busy with interest.

"Why don't you sleep a little longer?" There was an extra person at the door of the kitchen, which naturally couldn't be hidden from Chen Xin, he looked up at Qin Lan, and still continued to cut the lettuce that had just been scalded with boiling water.

"I'm a little sleepy when you're not there." Qin Lan looked at Chen Xin, and suddenly said something almost coquettish: "What do you eat in the morning?" ”

"You can't sleep without me?" Chen Xin smiled, glanced at her dotingly, and said, "I made a little lettuce salad and cooked porridge, but I don't know if you are used to eating it without salad dressing?" Go brush your teeth and you'll be able to eat in a while. ”

"Lettuce salad? It's good to be able to eat fresh vegetables now, but there are so many pickies. Qin Lan also laughed, wrapped in a blanket and walked to the room: "Then I'll go brush my teeth." ”

Qin Lan went to brush her teeth, and the lettuce salad on Chen Xin's side was also cut, and she only needed to season it with salt and other seasonings, and it was ready to be served on the table.

When Qin Lan came out of the bathroom and sat down at the dining table with only a shirt on, the dishes and chopsticks and steaming porridge were already on the table.

"It's better for Ah Xin to be here, you have everything, even breakfast can be eaten so comfortably!" While eating breakfast, Qin Lan asked Chen Xin, "I'm going back to the city bureau today, what about you?" What to do today? ”

"I'm going to make the ground source heat pump that the city government wants, and I can start early when I'm done." Chen Xin answered Qin Lan's question, and at the same time asked her, "Do you want me to send you back?" ”

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