At nine o'clock in the morning of May 26th, Lu Chen slept until he woke up naturally, and there was no longer a situation where he was frozen awake without being covered with a quilt a few nights ago, and measured the temperature, the temperature inside the shelter had reached 20 degrees, which is a more suitable temperature for the human body, neither hot nor cold.

Lu Chen got up and took a look, after a night's time, the nano core gathered another 200 points of energy, now consider whether to upgrade the defense first or upgrade the plant cultivation room first, after thinking for a while, Lu Chen decided to upgrade the plant cultivation room first, upgrade it to a small planting base, five hundred square meters is enough, of which one hundred square meters are used to plant vegetables, and four hundred square meters are used to plant hybrid rice, but now the current area of his cultivation room is only 100 square meters, and the space of 400 square meters needs to be expanded, which is estimated to consume a lot of energy and materials.

Then Lu Chen designed and calculated in the nanocore, and found that 5 tons of sand and gravel materials, 1 ton of cement, and 2 tons of steel were needed.

Lu Chen calculated his inventory, and found that it was not enough, which was a little uncomfortable, and finally found that his materials were only enough to expand the size of 100 square meters, after thinking about it for a while, Lu Chen decided to expand 100 square meters first, and then use the space of 200 square meters to plant vegetables first, the last time I went to exchange for water purifiers, I also saw that the official shelter was purchasing various materials, among which the value of vegetables and fruits was still relatively high, and at present, his rations were still sufficient, so he could use these two hundred square meters to plant a batch of vegetables first, Chinese cabbage and lettuce can be ripe and harvested in January, so that you can trade once a month, you don't have to go out frequently, and you can get a lot of supplies, in general, it's okay.

Then Lu Chen began to make nano worm nests, spent a hundred points of energy, and some materials to expand the planting room to 200 square meters, and then began to design the planting room renovation plan.

"First of all, it is planted with ordinary soil, if you use soilless cultivation can save a lot of space, but I don't have a formula for nutrient solution now, including the alternative, the soil can be excavated while the frozen soil has not yet formed outside, plus the expansion of the extra soil, it is probably enough to add one-third of the amount of soil,

Secondly, planting vegetables requires a lot of water, and if long-term planting will lead to a decrease in fertility, so you have to go outside to find fertilizer, there is a fertilizer factory in the nearby town, you can go to see later, water can be sprayed in the sky, so that you can open the valve from time to time to water it, and finally there is the problem of light, plants need photosynthesis, so a sun lamp prepared before is not enough, and you have to make a few more,

Finally, you can calculate the yield, estimate how many catties can be harvested by planting cabbage or lettuce in 200 square meters, at present I only have a pickup truck, with a load capacity of about 1.5 tons, and I am ready to plant half of the cabbage, half of the lettuce, so that the cabbage output is about 400kg, lettuce is about 100kg"

"Every month can mature a batch, then every month to exchange building materials, so that my planting room can be expanded once a month, the plan is to expand to 500 square meters, but if the later materials are more, directly in the addition of two hundred square meters, so that four hundred square meters for planting staple food, two crops a year can have a large surplus, three hundred square meters of vegetables, in order to ensure their own consumption at the same time also have the ability to trade, the remaining 100 square meters I can plant grapes, there is not much requirement for height, so that there is fruit to eat, as for meat, I also bought a lot of canned pork and beef, let's eat it for the time being, and then see if I can exchange it with the official. ”

After Lu Chen finished planning, he used the nano core to spend 100 points of energy to create a nano worm nest according to his own thoughts, and then took the worm nest into the planting room to start, and then Lu Chen left here and began to dig outside the shelter, after spending a few hours, Lu Chen dug enough soil and sent it back to the shelter, and then Lu Chen had time to take a look at the changes in the planting room.

I saw that the planting room has been built, the indoor height is about three meters, there are more than ten sun lamps distributed at the top for photosynthesis, there are several rows of pipes arranged below the sun lamp, there is a sprinkler head every other distance, to ensure that there is no dead angle when spraying water, the ground is divided into four open spaces by steel ridges, each open space has been paved with soil,

Lu Chen took out a shovel and dug a place, and found that the soil layer was not very deep, and then Lu Chen poured the collected soil evenly into the four open fields, until it was about the same height as the ridge of the field, Lu Chen estimated that the thickness of the soil layer was almost one meter, so that there would be no problem in planting vegetables or rice and wheat, and then Lu Chen took the shovel and tidied up each piece of land, and then went out of the planting room to open the valve to make the land moist.

Then, after looking at the time, it was already more than three o'clock in the afternoon, Lu Chen put on his equipment, walked out of the shelter, and prepared to drive to the fertilizer factory to see if there were any fish that slipped through the net and get some fertilizer back

......

Half an hour later, Lu Chen came to the door of the fertilizer factory, as soon as he got out of the car, a smell of urea came over, he was sure that he was not looking for the wrong place, pushed open the factory door, and found that it was empty, Lu Chen went in and spent ten minutes to find the warehouse where the fertilizer was stored, fortunately, there were still a few bags of urea and compound fertilizer in the corner that were not transported, Lu Chen drove the car in out of the factory door, put the fertilizer into the carriage, and went to another place to see if there was any harvest.

Lu Chen came to a production workshop, pushed open the door, it was dark inside, Lu Chen turned on the flashlight and walked in, looked around, and found that there was a lot of fertilizer at the discharge port of the production line, but it was all in the discharge barrel, there was no packaging, Lu Chen looked around, and found that there were some scattered plastic bags on the side, Lu Chen took the plastic bag and put it at the discharge port, and began to fill it manually, but there was not a lot of fertilizer in this discharge barrel, only two bags were gone, Lu Chen looked at the plastic bag, which said "Chengtian Fertilizer Factory" The words "25kg" are also marked below, just two bags are almost 100 catties, the previous warehouses were all this kind of small packaging, Lu Chen estimated that it should have been missed because of the small packaging, after all, the big ones are more conspicuous and not easy to miss.

Then Lu Chen found two more production workshops, these two workshops are still relatively rich, a total of 200kg of fertilizer was collected, all transported to the car, Lu Chen stood on the side of the car and looked at the estimated that there would be no gain, so he got in the car and left.

Lu Chen drove a car and walked on the road, and suddenly saw a private gas station on the side of the road, a very small kind, with only one façade room, but Lu Chen found that the façade room was open, and there was no one inside, it was estimated that the whole family had gone to the official shelter, Lu Chen pulled over and parked the car, ready to go in and have a look.

Lu Chen entered the façade room, looked around, and found that the oil tank inside should have been removed, and then found that there was a door inside, which should lead to the backyard, Lu Chen pushed the door open and went in, and found that there were two large oil tanks in the backyard, one was written with diesel and the other with gasoline, Lu Chen walked to the side and checked it, and was disappointed to find that there was no oil inside, and then Lu Chen checked it again in the backyard, searched for a long time, and finally found an oil drum in a utility room, which was full of dust, There are about 100 liters of diesel in it, Lu Chen was pleasantly surprised, but it was a bit difficult to look at this oil drum, a liter of diesel fuel weighs about 0.86kg, and a hundred liters is 86kg, which is converted to 170 catties, so heavy, Lu Chen can't move it for the time being, after all, the exoskeleton booster that he was going to build before has not been manufactured, and the one who was going to rebuild a crane arm on the pickup truck has not yet been done because of energy problems, so Lu Chen really can't take such a heavy oil drum.

Lu Chen thought for a while, and decided to find something to pump out the oil first, first draw out and add it to the car, it happened that the car didn't have much oil, and then Lu Chen found a smaller plastic oil drum marked 20 liters, and used the siphon principle to pump the oil to a barrel, and then walked to the side of the car and began to refuel inside, after refueling, Lu Chen found a few 20-liter plastic oil drums, and pulled out all the diesel fuel in the iron oil drum, and then put the diesel into the car, and found a few empty diesel barrels to put in the car, Lu Chen drove back satisfied.

Ten minutes later, Lu Chen returned to the shelter, after putting all the harvest into the warehouse, Lu Chen came to the planting room with cabbage seeds and fertilizer, planted the seeds, and after applying fertilizer, Lu Chen took a bucket to water each place, and then came to the door of the planting room to set the opening and closing time of the sun lamp, and then set the number of air changes inside the planting room and the shelter, so as to ensure that photosynthesis can be carried out normally, coupled with regular water spraying to ensure moisture, Lu Chen estimated that the growth should be good.

After finishing these, the time was almost eight o'clock in the evening, Lu Chen finished eating, looked at the situation on the Internet, and found that the country was full of news that officials were sending troops to collect materials and build bases, and then Lu Chen used the computer technology he learned to go over the wall to go abroad, and saw that there was chaos abroad, there were shootings and robberies everywhere, and many shelters were attacked and plundered by bandits, and the official shelters abroad were also suppressed because of lack of manpower, and the worst of them were the Sun Country and the Star and Stripes Country, Because one of the two largest meteorite fragments fell on the sacred mountain of the Sun Country, and the other fell in the volcanic park of the Stars and Stripes Country, it was these two volcanoes that were impacted and erupted, resulting in global volcanic eruptions, so a large number of shelters in these two countries were destroyed, and the loss of personnel and materials exceeded fifty percent, and because it was on the edge of the volcano, the volcanic ash was everywhere, the surface crops were covered with volcanic ash and died, and some personal shelters with insufficient ventilation facilities could no longer survive, and they must wear protective masks to avoid inhaling volcanic ashThe official has been organizing the production of a large number of protective masks, but the production line and resources are insufficient, and the production capacity is limited.

Lu Chen also saw that the Sun Kingdom called on the Internet for the Dragon Kingdom to give support, hoping that the Dragon Kingdom would uphold humanitarianism and rescue the Sun Country, but the Dragon Kingdom responded that the domestic materials were insufficient and could not be supported, but they were also a member of the Blue Star, considering the limited production capacity, the Sun Country could use the materials in exchange, but because it was a special period, the price might be relatively high, and I hope that the Sun Country could consider whether to trade.

Lu Chen smiled when he saw this, and browsed for a while, one of the messages said that a laboratory somewhere abroad was damaged due to an earthquake, but Lu Chen just looked at it and turned it over, and after a while Lu Chen was about to go offline to rest, and suddenly saw a post from an environmental scientist, which said that the oxygen content of the atmosphere would be reduced, saying that the volcanic eruption caused by the impact of meteorites would fill the atmosphere with volcanic ash, blocking sunlight and causing a large number of surface plants and marine algae to die, which would lead to a decrease in photosynthesis, Carbon dioxide rises, oxygen levels decrease, and said that as long as the oxygen content is reduced by about 2%, most people will have altitude sickness, a sense of suffocation, and the oxygen content will be further reduced over time in the future, hoping that the government and others will be prepared.

Lu Chen also felt that he had to prepare early, no wonder he was so tired from physical labor recently, it turned out that the oxygen content was decreasing, and then Lu Chen was thinking, not only indoor oxygen production, but also taking into account that he had to carry oxygen when he went out, and then thought of the idea that the protective clothing in a science fiction film "The Wandering Planet" was still a good idea, and he could also realize it, such as high-energy batteries, mechanical exoskeletons, high-strength protective fibers and other technologies, and even if the equipment in the shelter could not be manufactured, it could also be manufactured using nanocoresIt's a big deal to spend a little more energy, and it's not a one-time thing.

Then Lu Chen saw that the time was almost ten o'clock in the evening, so he went offline to wash and sleep.

"I'm thinking about the method of indoor oxygen production tomorrow, I'm too tired today."

Lu Chen lay on the bed and fell asleep slowly, tomorrow is a new beginning.