Doomsday: Unlimited upgrades to the shelter

Chapter 221 Upgrading the Roof
He always thought that the system must have a reason for letting him play with things, but Xie Yannan didn't know the specific purpose yet.

"It can be used as medicine to improve immunity... Actually, I can try to integrate them into our vaccine to see if it can improve the effectiveness of immunity."

Zeng Rui said tentatively.

After all, there have always been precedents for animal medicine in traditional Chinese medicine. For example, snake skin, cicada slough, and centipede are all excellent Chinese medicinal materials, and there are different treatments for various diseases.

"Okay, then it needs to be manually peeled off."

Just now, although Xie Yannan couldn't bear it, he still tried it a little bit. Its shell is indeed very hard, but the hardness is not a big problem. It seems a bit troublesome.

After all, the fingers still have a certain width, and the fingers cannot be stretched in, and the nails alone cannot use so much strength.

"It requires manual peeling. Everyone can come together to help. It should be done in a few days."

Ma Wu didn't know when he stood behind him, picked up the seashells on the ground and looked at them with a calm expression.

Xie Yannan nodded, cast his eyes on everyone, paused for a moment and said, "But I need some now, so I will trouble everyone, let's get five hundred today."

Xie Yannan asked Xiaoxiao to summon everyone except Zeng Rui to the ground, ready to help peel off the shells.

The main reason is that he can't wait to store these things into the system and complete the system tasks.Only in this way can I know where my shelter is not doing well, and why it has been unable to upgrade to a second-level shelter.

However, there is still strength in numbers, because Wei Xiaofei, as a woman, joined in the work, and everyone was not lazy. It only took half an hour to collect [-] shells easily.

Xie Yannan took advantage of the situation and stored all the shells into the system.

[The system has automatically turned on the smart mode]

【The task of collecting shells has been completed】

[System Reward Level [-] Shelter Map]

[Reminder: Level [-] shelters require natural light, which cannot be achieved under current conditions]

natural light? !
Xie Yannan frowned, it was so outrageous.

After all, this shelter is underground, and the roof is covered with dirt. Although the previous architectural design has holes and holes, it is impossible to fully achieve natural lighting. At most, there is a little more light? !
Even in high-rise buildings on the ground, there are still many places where natural lighting is not available.

While Xie Yannan was wondering, the system popped up a new prompt.

[The required seashells can be used to make shelter roofs, their hardness is higher than that of alloys, and their light transmittance is higher than that of glass and crystal products]

Xie Yannan's hands trembled, and he threw away the shell reflexively.

This thing was actually harder than alloy. Xie Yannan simply looked down upon it. It looked so insignificant and inconspicuous.

You must know that he has always been dissatisfied with the lack of natural light in the basement. Although there are some densely packed small holes and there are bright lights to replace them, in the end it is not as practical as a large area of ​​natural light.

Could it be that the system wants them all to replace their roofs with this kind of shells.

It's right to think about it this way.

In terms of hardness, the system has just said that it is much higher than the hardness of the alloy.

In terms of transparency, its light transmission is no worse than that of glass crystals.

As long as the roof of the basement is completely replaced with this shell material, natural lighting should not be a big problem, and the sun's rays can completely penetrate through the roof.

[The system has automatically turned on the smart mode]

【Processed shells】

[Upload blueprints to process and make shells according to the host's ideas]

[Processing fee: 1 points]

【Whether processing is required】

【Yes】

[System points have been updated, there are 5011 points]

【System processing...】

This time is the longest wait. After all, the roof of the entire basement will be replaced, and it is also the project with the largest area unknown so far.

Moreover, the system must not only perfectly replace the roof of the basement, but also ensure that the buildings above the basement are not affected.

Because greenhouse vegetables, greenhouse medicinal materials and ponds take up a lot of area, so even if the roofs of some rooms are replaced with transparent shell materials, the light will still be poor.

However, although there is insufficient natural light, it has no impact at all because there is light in the basement itself.

Fortunately, the bedroom that Xie Yannan was in happened to avoid these buildings perfectly, and the entire roof was covered with that kind of transparent shell.

Standing in his bedroom, he looked up and could even clearly see the stars in the sky.

only……

Because the transparency is too good, the privacy is too bad. If he can see the outside clearly, wouldn't he be able to see the inside clearly from the outside? !

In case of doing sports with Wei Xiaofei, wouldn't it all be broadcast live? !
Xie Yannan frowned and recalled that in his time, there was a kind of gray-blue glass with a thin film on it. The color of the thin film could not be distinguished, but sitting in the room, one could clearly see what was outside. But people outside the room can't see clearly inside the room.

That film is called tin foil light shielding film.

Xie Yannan hurriedly invoked the system, and coated all the outer layers of the bedroom with a light-shielding film.

Then he stood in the room and tested it again. Looking up from the room did not affect his line of sight.

He quickly ran to the ground again, looking down from the ground, he couldn't see anything clearly in the room, everything was dark.

In order to ensure safety, Xie Yannan specially used a flashlight to look down, but he still couldn't see anything clearly, even the light beam couldn't be displayed in the room.

Xie Yannan breathed a sigh of relief.

In the previous place, I lived with cockroaches and mice all day long, so I wished I had a big balcony. When I was tired from playing games, I could sit on the balcony and smoke a cigarette and enjoy the breeze.

But in order to save that little rent, even the windows of the rented house are only the size of a palm, and the toilets are still public.

But now, Xie Yannan had an inexplicable smile on her lips and gently sat down on the chair next to her.

Almost own a full set of detached villas.

Not to mention how awesome it is, at least it has everything to eat, drink and play, with food, entertainment, weapons, and its own fish pond and vegetable shed, and even medical treatment is complete.

You can also lie in a room full of stars and do exercises with your beloved woman, which is very romantic just thinking about it.

Xie Yannan could not help but smile.

By the time he finished all this, Wei Xiaofei had already fallen asleep.

He took a shower, climbed onto the bed lightly, put her head on his shoulder, and fell asleep peacefully.

……

(End of this chapter)