According to Chen Xin's estimate, if he can get materials from Mo Qingyan this month to upgrade the planting greenhouse and replant vegetables in time, then next month he can not only harvest vegetables that are seven times the current output, but also harvest the carrots planted last month, which can be described as a bumper harvest.

It's just that if you really collect so many vegetables, you must deal with them in time, Chen Xin can't eat so many vegetables by himself, and the only choice is to take them out and exchange them for supplies.

Bi The big freezer he exchanged from Mo Qingyan can put a few hundred catties of vegetables and fill it, that is, his current harvest in a month, if the real output increases by seven times, he must have no place to put so many vegetables.

Chen Xin thought about it carefully, and decided to plant upland rice according to his original idea.

If it is to use material upgrades, increase the planting area and hydroponic planting tray at the same time, Chen Xin can completely plant upland rice on the ground and move the planting of vegetables to the hydroponic tray.

In this way, he can not only harvest enough food for himself, but also have enough fresh vegetables to exchange for supplies.

After all, the upgraded planting greenhouse will be 200 square meters large, as well as the same area of hydroponic planting trays, 200 square meters of land to grow upland rice, two crops a year, almost 600 catties of rice.

The vegetables planted on the hydroponic planting tray can harvest about 600 catties of cabbage, more than 600 catties of lettuce and about 300 catties of carrots per month on average with his current planting ratio of half carrots and half cabbage and lettuce.

Although the carrots are harvested in March, they are also more resistant to storage, and are undoubtedly a high-quality material that can be traded.

After such calculations, Chen Xin suddenly found that his materials were abundant, and he had a great surplus of rice and vegetables to eat.

He could have traded most of his monthly vegetable output for supplies to upgrade his shelter and make his life better, as well as other things to enrich his table, such as meat and wine.

The output could also be exchanged for other things he needed, such as the small farm machinery he needed most for farming, and the firearms he needed to protect himself.

Of course, Chen Xin doesn't necessarily have to change guns, he can use vegetables to exchange for supplies, and then upgrade the weapon cabinet, point out the gun manufacturing drawings of the weapon cabinet, and make guns himself.

It's just that he wasn't sure what the gun he made would look like, if it was a more primitive firearm, it would be a little worse in terms of reliability and usability than the gun he had exchanged.

After all, he can ask Uncle Ding to change a pistol from the SWAT team through Ding Ning, and if he makes it himself, if the upgrade level is not enough, it is likely to be the kind of improvised firearm that does not even have rifling.

It's not that the gun can't be used, but it's really not very practical, and it's not easy to carry around.

However, the upgrade of the weapon cabinet must be carried out, as the old saying goes, "you can't have the heart to hurt people, and you can't do without the heart to defend people", and having a reliable weapon to defend yourself is also a guarantee for yourself to be able to live better in this last days.

Chen Xin, who thought like this, added the materials needed to upgrade the weapon cabinet to his list, and decided to use the vegetables produced this month as a deposit to contact Uncle Ding with Mo Qingyan in exchange for the materials on the list, and the final payment would be made up after he upgraded the greenhouse and expanded the output next month.

Although this payment method is a bit unreliable in the last days, with the relationship between himself, Mo Qingyan and Ding Ning, Chen Xin believes that he can still exchange these things.

After making a list, Chen Xin was ready to set up his communication antenna and connect to his shortwave radio station, so that he could get in touch with Mo Qingyan and them, and he didn't have to go to the city if he wanted to say anything.

The temperature is not too low now, and it is not a big problem to go for a run, but as the weather gets colder and colder, it will be a crime to go out.

Thinking so, Chen Xin took out the military shortwave antenna made in Lucia that he had specially prepared from the tin box, and walked out of the shelter with the box.

Of course, the best place to set up the antenna is the top of the mountain where his refuge is located, but considering that it is more troublesome to maintain and wire the antenna if it is erected on the top of the mountain, Chen Xin still chose to set up the antenna halfway up the mountain.

There is a pre-made cement base here, although the fire burned this place in the past, but the ash and residue on the surface were swept away, and the cement base on the ground was still intact, but it looked black.

After cleaning the cement base, Chen Xin took out the short-wave antenna in the box, erected it on the cement base, and screwed the bolts for fixing it into the screw hole reserved in advance, and fixed the short-wave antenna on the cement base.

After installing the antenna, Chen Xin also needed to connect the antenna to the shortwave radio station in the shelter.

Fortunately, the cable has been buried here in advance, so there is no need to pull the cable.

Chen Xin opened the grid of the vent of the shelter under the cement base, pulled out a cable from it, and plugged it into the interface under the antenna.

After doing all this, Chen Xin did not forget to cover the antenna with a layer of camouflage cloth to prevent anyone from discovering and causing damage.

Although there are almost no people who can appear in the wild again in this kind of apocalypse, the people who can still appear in the wild at this time must not be ordinary people, and if someone finds an antenna, steals it for itself or discovers its own shelter, and has any thoughts that should not be there, it is also a trouble for yourself.

So in order to reduce some unnecessary trouble, Chen Xin still put a layer of camouflage cloth on the short-wave radome, so that the entire antenna looks like a small black mound.

Looking at his own work, he was afraid of the dust on his hands, and Chen Xin returned to the shelter satisfied.

In the shelter, Chen Xin also took out the shortwave radio station, put it on the table reserved in the living room, and connected the other end of the cable to the shortwave radio station.

After turning on the switch of the radio station and debugging the channel, Chen Xin made his first call: "This is the writer, I am here to call all the survivor companions, please answer when you hear it." We are still alive，Live long and prosper.”

This sentence was the signal they had agreed to say when they got in touch after the disaster to identify themselves and the current situation of their survival.

Chen Xin waited, but there was silence on the shortwave radio, only the faint sound of electricity flowing, which made Chen Xin feel a little frustrated.

Just when Chen Xin looked at the unanswered radio station and wanted to turn it off, the answering voice finally sounded on the radio: "This is an old farmer, I'm glad to hear your voice, writer." We are still alive，Live long and prosper.”

"This is a driller, and I have enough supplies to accommodate my companions who need to take refuge. We are still alive，Live long and prosper.”

"This is a mountain climber, and it's doing well at the moment, so I'm glad that everyone survived this disaster. We are still alive，Live long and prosper.”

"This is ......"

Remembering the answers one by one, listening to everyone's answers, Chen Xin's heart was full of joy and excitement, and his companions in the survival group responded at this moment, proving that he was still alive and well.

And the last answer also remembered at this time: "I'm a dragon girl, I'm also living well, it's great that no one has lost contact!" We are still alive，Live long and prosper！ ”