Comforted by Qin LAN, Chen Xin doesn't say anything more, but he plans for the worst.

Optimism is needed, but it's also necessary to prepare for the worst.

In other words, if you plan for the worst, no matter what happens, you can be optimistic and positive, because the situation can not be worse.

For Chen Xin now, the worst is

That is, another geological movement will lead to the loss of pressure in the deep groundwater layer, and affect the shallow groundwater layer, resulting in the shallow groundwater flowing into the deep groundwater layer. Finally, there is no groundwater available here.

Although this is a very extreme situation, geologically speaking, it is not impossible for the groundwater to be cut off due to geological activities.

According to Chen Xin's current situation, if the groundwater source is cut off, he will face the dilemma of water shortage again.

Although he can exchange greenhouse vegetables for drinking water, there is a big problem here, that is, crop cultivation needs a lot of water resources.

Moreover, the vegetables planted contain a lot of water, which will not enter the internal circulation system of the shelter for recycling.

Therefore, if this happens, Chen Xin must find a way to get new water. As for moving, it is the final choice.

Fortunately, there is quite a lot of snow outside now, and snowfall happens from time to time. It's a good way to collect the melted snow and use it as water.

However, the snow outside is very dirty, and the collected snow needs to be purified and filtered.

In addition, upgrading the water circulation system can make the well deeper and the pump head larger, which is the result of the system upgrading. It is also a way to solve the problem once and for all.

After thinking about what he can do to deal with it, Chen Xin becomes more comfortable with the worst that may happen. At least he has enough means to deal with it.

This naturally made him optimistic, and he laughed at Qin LAN: "OK, the generator is installed. Next, let's continue to do the ground source heat pump. You've only made one equipment for the SWAT team, and there are still five to catch up with. I don't know if we can finish it in two days. "

"Ah Xin, your technique is so good that you can finish it on time, and I will help you." Having seen Chen Xin's "process" of manufacturing these mechanical equipment, Qin LAN has full confidence in Chen Xin.

"All right, Alan, help me take the parts cleaned yesterday..." Chen Xinzheng is going to let Qin LAN dry the parts washed yesterday, but the radio in the living room suddenly rings and calls.

Qin LAN and Chen Xinyi turn their heads and look at the living room together. They are surprised and say, "is someone calling you?"

"Well, I'll see what's going on. Alan, take out the parts you cleaned yesterday and dry them with water." Chen Xin orders Qin LAN and goes to the living room.

Picked up the short wave radio speaker, Chen Xin responded to the call, a dialogue, which let Chen Xin reaction, is another group of friends came to him to exchange ground source heat pump equipment.

After talking to Qin LAN, Chen Xin takes the gun and goes to the entrance of the shelter. Qin Lan also puts down her work and follows Chen Xin.

After putting on protective equipment in the preparation room, Chen Xin still goes to the small bunker through the passage and looks out through the observation port to see who is coming.

However, the car parked in front of his shelter surprised him a little.

It was an eight wheeled truck like a heavy truck, with eight huge tires one meter high, which made the car walk on the ground even in the thick snow.

But it is different from trucks. Instead, it has a solid and thick compartment like an armored car, and the windows on the compartment are also shining from the inside to the outside, dimly illuminating a cloud pattern of dragon head with black background and red lines on the body in the dark.

It doesn't need to be carefully identified. Just these conspicuous features are enough for Chen Xin to recognize it as a refitted RV and understand who its owner is.

"Ah LAN, don't go out yet." After Chen Xin nodded to Qin LAN, he opened the door of the shelter.

Qin LAN watched Chen Xin push open the gate of the refuge and go out. She was nervous, and the gun around her waist was also in her hand. She was ready to rush out at any time.

Chen Xin walked out of the gate of the shelter and saw that the other party had not turned off the headlights, which made him blink.

So he raised the flashlight in his hand and directly illuminated the cab of the car in front of him. He directly shook the driver's eyes with the flashlight.

Obviously, the other side was dazzled by Chen Xinhuang, soon turned the headlight into a low beam, and jumped out of the car.

However, the driver's cab of the car was obviously a little high. After the other party jumped down, his legs were directly inserted into the snow.

"Little brother Chen, why is the snow so deep at your door?" The people who got off the car pulled their legs out of the snow, and then they came to Chen Xin with deep feet and shallow feet.Looking at the figure walking in front of him, Chen Xin said with a smile: "how deep is the snow? Don't you feel it when you drive from downtown? And how many times have I told you not to jump out of the cab all the time and not be afraid to break your leg? "

"I'm used to it, I'm used to it. Besides, who's going to have the patience to climb down in such a high chassis car?" Although the figure was wearing a protective mask on his face, the voice of a playful face suddenly made people recognize his youth.

Chen Xin and this person are naturally familiar, otherwise the other party should call him a writer rather than an acquaintance like little brother Chen.

"Why do you come to me, Bruce? Don't you also want to change the ground source heat pump? " Chen Xin wants to laugh every time he calls Bruce Lee, because his surname is Li: "do you still need these in your shelter?"

"Why not?" The man immediately refuted Chen Xin's words and said to him, "my shelter is equipped with air conditioning. It used to be OK when there was electricity, but now there is no power supply. I rely on myself to generate electricity. I can't afford the air conditioning!"

Hearing this, Chen Xindao was able to understand the other party's practice, so he nodded and said, "OK, but you know the rules. Have you brought both the materials and the goods exchanged?"

"Brother Chen, don't you know me? When did I fail to rely on Li Yulong? " Li Yulong immediately patted himself on the chest with a confident look: "according to what you said, the two external air conditioners are made of materials. In addition, I also brought you a pickled ham and two boxes of individual rations.

Ham I wanted to take Iberian ham, but my father didn't let me, so I took a Jinhua ham. Don't dislike it, brother Chen. "

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