Doomsday: Unlimited upgrades to the shelter

Chapter 53 Strengthening Defense
A larger petri dish appeared in front of Xie Yannan and Zeng Rui.

The diameter of the original petri dish was only 8 centimeters, but this one is obviously about 14 centimeters. Although it has not doubled, it can still cultivate a lot of antibody serum.

"Grandpa, thank you for your hard work. We are starting to have more people now. I plan to take the pills and exchange for some fish fry. Do you think tomorrow will do it?"

he asked with some guilt.Xie Yannan couldn't bear to exploit the labor force of an old man like this.

"It's fine tomorrow morning." The old man carefully observed the new Petri dish and pondered for a while, "We should be able to produce 10 pills a day."

It can be regarded as a huge improvement. After all, everything needs points to be redeemed. Xie Yannan has to grasp the speed of it, so as not to miss one of the upgrades.

After a day of tossing around today, Xie Yannan was really tired, so after a simple dinner, he lay down on the bed early.

[Generate 81 degrees today, get 81 points]

[2.2 tons of purified water today, get 2200 points]

[Purify two parties of natural gas today, get 2000 points]

[All humans in the shelter survive for more than 24 hours and get 100*6 points]

【System points have been updated, now 9802 points】

Xie Yannan sat up after listening to the system's report of the points, recalling the defense net that had just been destroyed by a boulder, he thought it was still necessary to build a wall around the valley.

[The system has turned on the automatic detection mode]

【Build a defensive wall】

[The wall is expected to be 3 meters high, and the required bricks are 15890 pieces]

【Required Points: 15890*0.4】

[Labor fee: 3000]

【Whether to choose to build】

【Yes】

[Start drawing mode: put the defense line on the top or corner of the wall]

[Top of wall]

【System points have been updated, now 446 points】

【System processing...】

Xie Yannan's plan is the same as the defense of his ordinary old community in the real world. Build a grid with needles on top of the fence, so that thieves can't climb it, even if they are lucky enough to climb it, they can't cross the grid.

Xie Yannan was still thinking about how to prevent the mutated eagle. Hearing Xiaoxiao and Wei Xiaofei who were next door talking in a low voice, the two of them sometimes laughed a few times, and sometimes remained silent for a long time...

……

"Brother Nan, wake up." Unlike usual, Xie Yannan felt that his ears were much cleaner when he got up in the morning.

He saw that standing in front of him was Wei Xiaofei, not Xiaoxiao.

Even though Wei Xiaofei took a shower yesterday, she was still wearing dirty clothes.There is no way that it is lucky that the clothes of the last days can cover the body, how can there be so many picky people.

Seeing her big, watery eyes looking at him, Xie Yannan was a little embarrassed, "Where's Xiaoxiao? Didn't she jump over to call me every day before?"

"Xiaoxiao said she was going to help Brother Xiaocheng cook, and asked me to call you, and said that you were going to buy fish for her today." Wei Xiaofei also felt that the two of them were uncomfortable in the same room, so she walked out quickly for a few minutes. Step by step, "Get up quickly, finish your breakfast, go early and return early."

"Feifei..." Xie Yannan suddenly stopped Wei Xiaofei.

"It's okay, it's okay, I'll call you." Xie Yannan recalled meeting this girl during the darkest time when he was graduating and looking for a job. He once encouraged himself like a ray of light.Both of them secretly liked each other, although they didn't get together in the end and ended with Wei Xiaofei's sudden disappearance, but the misunderstanding was resolved after all.

But the past can't go back.

"Get up quickly, Xiaoxiao is so cute, she still wants to match the two of us." Wei Xiaofei pursed her lips and smiled, feeling a little regretful, "But now, living well is more important than anything else."

She walked out without turning around to look at Xie Yannan at all.

Thinking of the addition of a beloved girl in the valley, he felt more and more uneasy. He always felt that there were many deficiencies in his defense. He got out of bed and touched the cave where Uncle Wei lived temporarily.

"Uncle, I want to talk to you." Xie Yannan didn't care if the Uncle Wei in front of him was Wei Xiaofei's father or not, he just thought that he might help him to better defend the valley and the refuge, so he came to ask for advice with the cheek.

"You want to ask me about the defenses around me?" Jiang Jue is very hot, and Uncle Wei can see through Xie Yannan's thoughts at a glance.

"Yes, you know the relationship between me and Feifei before. Although we are just friends now...but we still want to be safe." Xie Yannan didn't care so much about Xiaoxiao, Wei Xiaofei wanted to give the best in the world to her she.

"I took a stroll around in the morning and took a look. Our defense is really not good. But as you said, we don't have that strong strength yet. But we can make explosives by ourselves, and every defensive wall you build Induction explosives are planted underneath."

"If there is a foreign object approaching, it will automatically detonate, but this also has flaws, and it is afraid of accidentally injuring compatriots."

Uncle Wei paused, "We don't use traditional TNT high explosives, we can use liquid explosives."

Xie Yannan had already thought about the matter of potions and explosives, but he is only a construction engineer and has no research on these aspects. He originally planned to use alcohol or 84 disinfectant, but felt that doing so was not only useless, but also extremely wasteful .

"Use toilet cleaning liquid and 84 disinfectant." Uncle Wei picked up a stone from the ground and gestured, "Bury a layer of toilet cleaning liquid on the outermost side of the corner. The toilet cleaning liquid is basically harmless to the human body, but it also has slight corrosiveness."

"At this time, if someone enters by mistake, they will find out the clues and retreat. But if it is not a person, but a monster, what they sprayed on them is only a small amount of 84 disinfectant, and they will definitely continue to move forward. We are on the second floor. 84 disinfectant is buried in the defense. Using 84 disinfectant and toilet cleaner at the same time will cause strong corrosion, especially burn the skin and organs of zombies."

Uncle Wei's words were easy to understand, and Xie Yannan immediately understood what he meant. He nodded, "So there must be a ratio between toilet cleaner and 84 disinfectant?"

"Yes, according to the ratio of 1:3, it's actually not that strict. I just think it's easier to get these things, and it's better than zombies hitting our walls directly."

An expert is an expert, Xie Yannan couldn't help admiring him, so he wouldn't be afraid of blowing up his own city wall because of the wrong use of explosives.

"Then do this, Uncle, can you roughly calculate how much potion you need?" Xie Yannan was mainly not sure whether the system could provide it.

"Yeah, I don't need much. One ton of toilet cleaner and three tons of 84 disinfectant are more than enough." It turned out that Uncle Wei had already calculated simply.

"When Qin Xiaocheng is free for a while, he and I will take Feifei to repair the defense. You can do whatever you need to do."

Xie Yannan was still thinking that the system would not be able to use so many points to pay labor costs, but when he heard what Uncle Wei said, he felt more at ease.

(End of this chapter)