After the great evolution of Bluestar microorganisms, the difficulty of preserving food has increased significantly, and human beings have thought of many ways to extend the shelf life of food.

The method of drying and then draining the air vacuum packet used by Xia Qing is a commonly used low-cost food storage method.

This method only isolates the influence of "aerobic bacteria" and abnormally active bacteria in the elements on food, but cannot inhibit the toxins produced by "anaerobic bacteria".

Even unhulled wheat and maize, which are shelf-stable grains, have a maximum shelf life of only three months using this method.

After three months, even though the food still looks intact, the toxins produced by the evolved anaerobic bacteria have spoiled the food.

Evolved anaerobic bacteria produce a variety of toxins, including one of the most virulent biotoxins after the evolution of Bluestar Biotech - Evolved Botox.

Evolved Botox can't die after boiling it in boiling water for several hours, so it's not a starving person, and no one will risk their lives to follow up with the germs.

In addition to this simple way of storing food, there are several ways to store food that are costly and effective, and the most commonly used is food storage bins.

Storage bins are built in the planting and breeding centres in the safe zone to store food. The storage bin can extend the shelf life of food, the main food crops can be extended to more than one year, and the easy-to-store vegetables such as onions, potatoes, sweet potatoes, eggplants and Chinese cabbage can also reach more than three months in the storage warehouse.

After the great evolution of microorganisms, it is already remarkable that such a storage period can be achieved.

Xia Qing is not a technician and is not qualified to participate in the construction of the storage warehouse, so she has not figured out the operating principle of the food storage warehouse until now, and only knows that the storage warehouse needs to meet two basic conditions: one is to filter out the elements in the air, and the other is to control temperature and humidity.

The destructive power of blue star microorganisms is directly proportional to the content of milddens in the atmosphere, and the destructive power of microorganisms even increases exponentially after reaching a certain concentration.

Temperature and humidity control is very difficult, so the cost of food storage is very high, and the cost of maintaining the operation of the storage warehouse is also frighteningly high.

Before getting Yishi, Xia Qing didn't think about storing food in his territory for a long time. One is because she doesn't know how to repair the storage warehouse, and she doesn't want to find someone to repair it, and the other is the cost problem, and it is not worth building a storage warehouse for the melons and jujubes she planted or collected.

There is also a very important point: Xia Qing overheard Tang Zhengrong introduce to Huang Jie, the director of the territorial management of the Huicheng General Base, that the planting area of all the territories of Huisan is 1,358.6 mu.

How did you get this number of zeros and whole numbers?

Xia Qing lived in the territory for half a year, and the territory management department did not send anyone to inspect and measure the planting area in the No. 3 territory, and Xia Qing did not hear that they went to measure the planting area in other territories.

Without field surveys, there is only one possibility left to obtain such detailed data: the data was obtained by the territorial management department through satellite measurements.

In the early years of the natural disaster, the cosmic gamma-ray burst destroyed all the low- and medium-orbit satellites of Blue Star, and only a few high-orbit satellites were left from China. After the natural disaster, all countries are trying to restore communications, and Xia Qing heard the news of China's successful satellite launches several times through the radio.

Since the base can use satellites to measure the planting area of the territory, it can monitor every move in the territory. This is also why Xia Qing is the only one in the territory, and she is still cautious and secretive when she goes to get spring water.

Although she is now only one of the inconspicuous lords in the two hundred territories of the Huisan base, the sudden addition of multiple solar panels and the construction of food storage warehouses in her territory will definitely attract the attention of the lord's management department.

Xia Qing just wants to live a low-key and high-quality life, and she doesn't want anyone to pay attention to her, so she doesn't want to make big moves.

Now, she has solved the biggest problem of food storage. As long as you dig a cool and dry cave, do a good job of moisture, insects and bacteria, you can store food.

The shelf life of food stored in this way is even longer than that of vacuum-packed!

There are so many mountains in her territory, isn't it easy to dig a cave?

Xia Qingmei ate the fruit of the ground, laid out the detailed map of the No. 3 territory and the three districts of No. 49 Mountain, and began to choose a site.

These two drawings were exchanged for vegetables by her and Zhong Tao, the No. 3 collar map was drawn by herself, and the map of the three districts of No. 49 Mountain was drawn by Luo Pei. The crops she grows, as well as the native edible plants found in the territory and the three sectors, are marked with pencil on the map.

It can be said that these two are her own treasure maps.

Xia Qing first added the position of the three pieces of Nim fruit, and then looked at the more and more small dots, circles or small squares on the drawing, full of a sense of accomplishment.

Because these are foods, and in the midst of natural disasters, there is nothing more secure than food and weapons.

The more than 15,000 acres of mountain forests and cultivated land on the picture belong to hers, and she can dig the cave wherever she wants, as long as the depth of the cave does not exceed 30 meters.

Exceeding 30 meters would damage the internal structure of the mountain, which could affect the most precious resource she possesses: unpolluted spring water.

Xia Qing hesitated for a while between the third area and the buffer forest, and decided to dig the cave in the west buffer forest.

Although the third area of No. 49 Mountain belongs to her, the altitude is also higher than that of the buffer forest, and it is easier to control the temperature. But putting food in a place where it can't be seen or heard at any time, Xia Qing is not at ease.

After the site selection is completed, digging a cave is a trivial matter for Xia Qing, who has tools and strength.

There was no hurry, and she began to deal with the most critical "technical means" for preserving food - making Yishi protective shells.

After opening the information sent by Luo Pei and studying it carefully, Xia Qing, who had three months of experience in iron shaking, felt that it was not very difficult.

To make the protective shell of the shell, it is necessary to melt the gravel screened out of the surface layer and the soil near the shell at high temperature, and then add a certain proportion of iron, carbon, silicon, manganese, nickel and aluminum, and melt and cast it into a shell with a certain thickness.

Xia Qing took out her tool kit and looked through the supplies she had accumulated over the years. Iron, carbon, silicon, aluminum, manganese and nickel need to be bought.

Xia Qing took out his mobile phone and sent a message to Zhong Tao.

Zhong Tao quickly replied: No problem, why does the girl want this?

Xia Qing replied: My machete is broken, and it is too expensive to take it back to the safe area to repair, so I plan to recast it. I worked in a blacksmith in the safe zone, and I knew a little bit about ironsmithing.

Zhong Tao, who had just walked into the military canteen in the safety zone, was stunned for a few seconds before replying: Sister, is there anything you can't do?

Xia Qing hehe, put the phone back in his pocket.

"Why don't you go to dinner, report the itinerary to your daughter-in-law?" The brothers in the same camp came over with a dinner plate, and when they saw Zhong Tao standing in a daze, they asked casually.

Zhong Tao ran to eat and came back, and asked his comrades-in-arms, "You said, does a woman who can farm land, build houses, and strike iron evolve with the power of a man?" ”

Zheng Kui knew who Zhong Tao was talking about as soon as he heard it, and he didn't say anything. The brother next to him hehe, "It's not that she needs to find a man, is there a man who dares to marry such a woman?" Do you dare? ”

Zhong Tao's head shook like a rattle, he didn't dare to think about it, and he was bored.

In the No. 3 territory, Xia Qing first changed the two distinguished guests of the family with clean drinking spring water, and then listened to the radio to bring back the chickens that had been in the cage and put them in the tool room, before starting to cook dinner for himself and the sheep boss.

I was greasy at noon, and Xia Qing decided to eat something light in the evening. Mung bean rice porridge, white flour cake, cold vegetables, chopped pepper bird blood and a few pieces of roasted heron meat.

The sheep boss is a tender toon leaf and pasture mixed with compressed rations, and the green light alfalfa and perilla stink amazingly after flowering, don't talk about eating it now, just passing by, Xia Qing and the sheep boss are eager to take a detour.

After the meal was cooked, Xia Qing stood in the room and shouted loudly, "Boss, eat." ”

The sheep boss, who was lying in the sheep shed and chewing, completed the whole set of actions of washing his feet, rubbing the grass, opening the door and entering the house and serving the table in a few seconds, squinting at Xia Qing.

What about rice?

Xia Qing took out his rice bowl and pretended to be lost, "Boss, after your friends came, you didn't stick to me anymore, I'm very disappointed." ”

Lost, what's that thing, is it delicious? The sheep boss's eyes only follow the rice bowl.

Xia Qing, who was playing the piano to the sheep, was speechless, put down the rice bowl, and rubbed the horns of the sheep fiercely, "You have no conscience!" ”

Can't let the light out at night, Xia Qing closed the security door, pulled down the blackout curtains, turned on the headlights, went to the kitchen to wash his hands, brought his food to the dining table, and shouted happily, "Open dinner!" ”

The amber eyes of the Brain Evolution Wolf lying in the sheep shed stared in the direction of the security door that had been closed for a while before slowly closing.