After the protective door is strengthened, Ankai's next step is to strengthen the overall structure of the shelter.

　　 This time, his goal of strengthening is mainly aimed at natural disasters such as earthquakes.

　　In simple terms, it means adding columns and beams to enhance the overall strength of the building.

　　 Because the shelter is built inside the mountain, it is difficult to detect through the mountain due to heat induction and noise detection. The main reason is to prevent it from the front entrance, so even if it is strengthened, it is not necessary to strengthen the entire building. What needs to be strengthened as a whole is nothing more than earthquake prevention. In theory, underground buildings have stronger earthquake resistance capabilities, but specific examples show that even underground buildings require certain measures and enhancements to have better earthquake resistance capabilities.

　　 Whether this place is an earthquake-prone area or not, An Kai does not know. He asked Kent before, and Kent said that the city has not experienced an earthquake in decades.

　　 But now is different.

　　 A nuclear explosion may induce an earthquake.

　　 An Kai forgot where I saw similar texts before, saying that within two months after the nuclear explosion, within 20 to 30 kilometers of the explosion site, there were usually multiple earthquakes. The reason is also very simple, mainly because the huge energy released at the moment of the explosion of nuclear weapons causes a chain reaction of energy in the earth's crust. Now the shelter has not experienced an earthquake, but it is not difficult to strengthen it. Earthquake-proof strengthening only needs to add some support structures to reinforced concrete. At present, the shelter has enough steel, and this work can also begin.

　　There are also two specific upgrade plans.

　　 are earthquake-proof and explosion-proof respectively. Even if it is a mountain, it can be blasted in the correct way.

　　 Explosion-proof is more troublesome, so the only thing Ankai can do is earthquake prevention.

　　According to the system's prompts, seismic strengthening only needs to add a beam every few meters, and add two columns under each beam.

　　 But if you do this, some equipment will need to be moved. Of course, this is not a problem. It is just a simple adjustment. There are few parts that need to be removed, and most of them are just moving.

　　The plants in the plantation have matured today.

　　 Of course, they do not mature at the same time. Different crops have different maturity times.

　　 Of course, it can't be completely synchronized with the real world, and that would be too slow.

In the system planting box, the Chinese cabbage is the fastest to mature. It can mature in 27 days, and one seed can produce a Chinese cabbage of nearly ten kilograms, and each tree is exactly the same, just like a mold. Carved out in general. In normal Chinese cabbage, the outermost leaves are too old, so the outermost leaves are usually peeled off after being cut from the ground, but this is not a normal age. There was almost a food crisis before the shelter, which is also safe. Kai and the others went out to take an adventure before they survived the storm. Now it’s hard to have something to eat. If it weren’t for the roots of the cabbage, everyone would love to cook the roots of the cabbage together.

　　 Cabbage is also called Bai Cai in the folk, which means "the dish of the common people" and also refers to the "king of a hundred vegetables". It has a particularly high edible value. From the perspective of nutrition, Chinese cabbage is rich in vitamins, dietary fiber and antioxidants, which can promote intestinal peristalsis and help digestion. Moreover, the vitamin C content of Chinese cabbage is higher than that of apples and pears, which is at the same level as that of citrus, and its calories are much lower.

　　 In short, the successful harvest of this dish is a big event for the shelter.

　　 But this is already yesterday.

　　 The ripe dish today is potatoes.

　　Tudou is even more powerful.

　　 In the past life, potatoes were the fourth most important food crop in the world, second only to wheat, rice and corn.

　　 The maturation time of potatoes is 29 days, one day more than Bai Cai, and the yield is much better than cabbage.

The 　　 system planting box has the effect of accelerating the growth rate, increasing the yield, and eliminating pests. One planting box can grow three cabbage, and the total output is nearly 30 kilograms. However, the output of potatoes is more than that of cabbage. Although each planting box can only grow three potatoes, each potato seedling can produce more than ten fist-sized potatoes, and each potato weighs at least one jin.

　　 And the value of potatoes is not only in terms of yield.

　　Potatoes are rich in nutrients and complete. Its rich vitamin C content far exceeds that of food crops; its higher protein and sugar content greatly exceeds that of ordinary vegetables. Its protein molecular structure is basically the same as that of the human body, and it is easily absorbed and utilized by the human body, and its absorption utilization rate is almost as high as 100%. Every 100 grams of potatoes also contains 502 mg of potassium, which is a rare high-potassium food that helps lower blood pressure; carotenoids are natural antioxidants that can protect the heart and scavenge free radicals.

　　 In short, potatoes are rich in nutrients. The most important thing is that potatoes are plants rich in carbohydrates and can serve as staple foods.

　　 This is what cabbage can't compare to anyway.

Carbohydrates are essential nutrients for the human body. At present, in addition to potatoes, wheat grown in several planting boxes in the shelter can have the same effect. In the apocalyptic environment, as long as it is food, it is very important, not to mention that it can replenish carbon water. Food too. Potatoes are produced in large quantities. They can replace staple foods and serve as vegetables. They have various methods and have a sweet taste. They are the most important food in the sanctuary of the doomsday world, and none of them.

　　 The harvest of the two major vegetables made everyone in the sanctuary smile.

　　 During dinner, An Kai did it himself.

　　 made stir-fried cabbage, cool cabbage, sweet and spicy cabbage, and cabbage soup. Potatoes are used to make shredded potatoes, mashed potatoes, potato chips, and potato cakes. Finally, with some canned meat, the deliciousness of this meal is beyond everyone's imagination.

"too delicious!"

　　 Curry cried as he ate. UU reading www.uukanshu.com

　　 "Hey, don't you think it's just cabbage and potatoes."

　　 An Kai looked at Curry's show of Yan Yi, and said helplessly.

　　 "What do you know! Do you know how difficult it is for me to go to the bathroom recently? I have been constipated for several days!"

　　 Curry shouted with tears in his eyes.

　　 Other people put down their chopsticks, spoons and forks one after another, and he said that they were disgusting.

　　 Although it was disgusting, everyone didn't hate Curry because of it. On the contrary, they showed empathy.

　　 What An Kai could say, he could only shake his head speechlessly.

　　 His body is affected by the system, and he will not experience constipation, but other people are different.

　　 It’s been a long time since I had eaten vegetables and fresh fruits in the shelter.

　　Although everyone has canned fruits to eat, if you eat a little bit of this stuff, you can eat less. Everyone can only eat less. Needless to say, the vegetables are gone.

　　 If you don’t take in plant fiber, your gastrointestinal motility will slow down, and it’s normal to cause constipation. Every day when it comes to going to the toilet, everyone is bitter, just like going to the execution ground. But I still have to go, and I can't skip or eat less because of this, so the recent incident has made everyone particularly distressed.

　　 But it’s better now. After eating vegetables, I believe it won’t be long before everyone’s stomachs can be adjusted. And eating canned food every day, the taste is not acceptable to ordinary people, with cabbage, it is definitely a big adjustment.

　　Don't talk about Curry, the little guys and the ladies all have red eyes. The more they have experienced good life and hard times, the more they feel that this life is precious.

　　 so that everyone was eating while looking at An Kai with admiring eyes, so An Kai almost couldn’t put down his chopsticks.