Under normal circumstances, the cost of farming underground is extremely high, one reason is that opening up underground space requires a considerable cost. The other is that the growth of plants requires photosynthesis. Artificial simulation of sunlight requires too much energy.


    However, for infected people, these are not much problems. Opening up underground space is not a big problem for them.


    Randomly assign hundreds of people to practice the skill of soil attribute, and you can easily control the underground soil. Form a vast space. As long as the underground soil is compressed to the corresponding position according to the structure on the architectural drawing. It can ensure the stable structure of underground space.


    As for the second point, the plants they grow do not need sunlight. The underground light is only convenient for people to see things. There is still a big difference between light and sunlight. Even if it''s a lamp brighter than the sun, as long as it''s not Yuba, you won''t feel hot on your body. Energy consumed. It''s much smaller than simulated sunlight.


    "By visual inspection, there are about 15000 mu of land on this floor, and the planting scale is not strong enough! There should be other floors underground. This grain alone can''t support so many people. "


    As the saying goes, if these infected people don''t start planting, the supplies put by Tiandou empire will not be enough to feed them with the increase of population.


    At that time, even if they don''t want to rebel, they will be because of the shortage of food. They have to fight back, or they will fight because of the lack of food.


    Now with food in hand, more infected people can be accepted. As long as they want to, they can make it an underground city that will never fall.


    Even if there is not enough food one day. They also have several large organic manufacturing machines sponsored by someone. As long as you put weeds, grain straws and other things into it, you can transform organic matter that can barely feed.


    Although it will be terrible. However, it is still very simple to maintain internal order in a short time.


    They moved on and called the bus to the next floor. Although there were elevators, they wanted to see the situation outside the field.


    The architectural form of the underground city is quite strange. There are fields in the middle and cities around. The city is like a ring, enclosing the fields in the middle. This layout is quite unreasonable in urban planning. It will make the traffic inside the city extremely congested.


    However, the infected people still carry out such planning and can not see the intention. What is surrounded by the city is not only fields, but also possible battlefields in the future.


    If the dungeon is invaded, the enemy must be from the center. The entrance comes in. At that time, the enemy will be surrounded when he rushes in. The battle in the central part will not damage the facilities inside the city. As an underground fortress, this design is relatively reasonable, some of which are similar to the urn of the ancient city wall.


    Continue down, the building situation below is the same, but there are more canteens and dormitories here. The dormitories are still ordinary, that is, between four or eight people, which is more crowded.


    The canteen is a little strange. A group of people sit in the canteen and eat constantly. Most of their food is hard to swallow synthetic food. It seems that eating is their job.


    "What are these people doing? I think those things on the table are so awful. They all look so bitter. I haven''t eaten all day! " Ice emperor looked at these people who were eating and showed an ugly look on his face. He felt a lingering palpitation.


    "Well... I can probably see what they''re doing." The shadow saw the whereabouts of their food, and everything they ate was sent to the surface.


    "These people should be a group of guys who have practiced the skill of helping others eat. They are now helping those who act on the surface to eat.


    Those on the surface need to act like they don''t have enough to eat. So you can''t eat at ordinary times, but you can''t really let them starve to death. So it''s like this! "


    The ice emperor shivered: "I thought it was a very happy thing to take food with me. Delicious food is eaten from my mouth, and fat grows on others. And I''ve never been full.


    I didn''t expect it to be such a painful thing to eat for others. "


    "Since they are working, they certainly won''t eat any delicious food for others! If it''s a delicious food, how can anyone want others to eat it for him? Things that need to be put forward by others are usually very unpleasant. " Chengying had guessed this possibility when she got this skill.


    "Is there such a possibility? Is to invite others to be eaten by themselves. " The ice emperor had an idea. She turned her mind very fast on food related things:


    "It''s the kind of food I eat, and then everything I eat appears in other people''s stomachs, so I won''t get fat and never get full. It''s perfect! "


    "Er... It''s not impossible. You can try tulip promotion when you go back. It should create a lot of jobs." When it comes to jobs, the filmmaker wants to kill those guys in the skill research department. Since they created the skill of shit for others, many more jobs have been created. Many professional shit people have emerged in the society. People can''t bear to look straight at the sudden change of painting style.


    "Well... Wait, this man... Something''s wrong." What does the filmmaker seem to notice?


    "What''s the matter? Is there anything wrong with that man?" The ice emperor looked carefully and found no problem there.


    "This human body contains trace radioactive elements, which can only be produced through artificial synthesis. It is absolutely impossible that he ate something strange and entered the body. These radioactive substances should have been implanted into him before he came to Tianjing City, because there are no conditions for synthesizing this element. "


    The ice emperor thought and said, "since you can''t figure out what''s going on, think about the role of this element."


    "Function... There are many functions of this element, but it seems that there are not many usages that people on Douluo mainland can do.


    Well, generally speaking, this element can be used to treat diseases, but it has nothing to do with crystal disease. This person''s body doesn''t seem to have had that kind of lesion.


    In addition, the pursuit element also has some military functions. For example, it can be used as a beacon of an air reconnaissance aircraft and scanned by special instruments. This element will be very conspicuous. Even if separated by hundreds of miles, it can be easily found. "


    After listening to Chengying''s words, the ice emperor suddenly thought of something and asked Chengying: "do you remember you told me about the mark recapture method before?"


    "Mark recapture?"


    [to be continued]


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