After eating lunch at Mo Qingyan's place, Chen Xin drove back to his shelter without staying.

It's just that his emotions are a little excited along the way, and his demeanor is also a little strange.

Returning to the shelter, parking the car in the maintenance room, closing the door again, and taking off the equipment on his body, Chen Xin quickly returned to the shelter, sat down on the sofa in the living room, and calmed down his excitement due to the unexpected gain.

"Help others improve their living conditions in shelters and get 100 survival points"

"Help others to improve their living conditions in a shelter for the first time and get 100 survival points"

"Help 2 people improve their living conditions and gain +2 survival points every day"

The system, which had never had a sense of existence, suddenly swiped three prompts in a row, making it difficult for Chen Xin not to notice this information.

The sudden increase of 200 survival points and the daily gain of survival points +2 are undoubtedly a huge surprise for Chen Xin, and it is also a rich harvest.

He helped Mo Qingyan make an oxygen concentrator, and the survival points he invested were only a few material processing fees, but what he gained was equivalent to the survival points he obtained in half a month.

With such a rich return, Chen Xin couldn't help but wonder if he should make more oxygen concentrators for others.

After all, except for the one item that "helps others to improve their living conditions in a shelter for the first time" is an achievement and cannot be obtained repeatedly, the other two can be obtained repeatedly.

Although "helping others to shelter and improve their living conditions" is a one-time income, the system does not say that it can only be done once.

Chen Xin's brain is not stupid, the oxygen generator can improve the living conditions, so can the planting greenhouse? What about ventilation systems? What about biogas fuel cells? What about a stronger shelter door?

Improving the living conditions of a shelter is the same as improving the living conditions of Chen Xin's own shelter, which is a project that can be continuously improved.

This also means that he can gain a large number of survival points, as long as he is willing to help others improve their living conditions.

And improving the living conditions of others can also harvest more daily survival points, which obviously greatly increases the speed at which Chen Xin can obtain survival points.

Through these three prompts, Chen Xin seemed to see that a large number of survival points were surging towards him, and the power armor and mecha that he expected to appear after the upgrade of the shelter also seemed to be slowly walking towards him, and even beckoning to him.

"To improve the living conditions of others, one person per capita is a little more per day, if I can get the official shelter to brush up on such a rule, 10,000 people will be 10,000 points a day!" Chen Xin muttered to himself excitedly, although this was just his fantasy, it did not prevent him from looking forward to a bright future.

However, this is indeed a great possibility, as long as Chen Xin can improve the living conditions of a large shelter, according to the current prompt given by the system, a person can get a little more survival points every day, which is enough for him to get a large number of survival points by head.

Of course, it's not easy to really want to do that.

A large shelter is not like a small shelter, Chen Xin can upgrade anything to improve the living conditions.

For the Great Shelter, in order to improve the overall living conditions, it is undoubtedly necessary to upgrade the entire Shelter.

Obviously, this requires a much more investment of survival points than upgrading a small vault to achieve the goal.

It's like the oxygen concentrator of the official shelter, and the biological façade of up to several thousand pieces is not what Chen Xin is capable of making now.

Even if he uses the survival point upgrade, the survival point consumed by such a large equipment is probably enough for Chen Xin to upgrade his shelter as a whole.

All in all, helping the Great Vault improve its living conditions can indeed bring great rewards, but it is not something that Chen Xin can afford now.

However, this also gave Chen Xin another way of thinking, it doesn't affect the big shelters, and there are small shelters to use!

There are quite a few people in the survival group formed by Chen Xin and Mo Qingyan who have built their own shelters, and in the statistics after the disaster, all the group members together have a total of more than 20 private shelters.

Although in the past few months, a small number of the group members abandoned their shelters and went to official shelters with supplies due to lack of preparation or because their original plans were only to survive the disaster, there are still nineteen private shelters remaining.

Five of them are in Linshi, two are in Sanzhen, and the remaining twelve shelters are in the city, except for Chen Xin and Mo Qingyan.

In the previous routine communication, everyone's situation was not bad, there were no big problems, and the material reserves were relatively sufficient, except for the exchange, there was no need to even exchange materials.

But now for Chen Xin, these ten shelters are Bai Huahua's survival point!

It doesn't even need more, each shelter sends an oxygen concentrator, which can provide Chen Xin with a thousand survival points, as long as he makes up some more, he can use materials to upgrade the shelter as a whole.

Thinking of this, Chen Xin couldn't help but get excited, he had already seen the power of the system upgrade function, if he could upgrade the shelter as a whole, it would undoubtedly bring him better living conditions, and allow him to better survive in this apocalypse.

The temperature is already freezing and will continue to drop, and if you don't prepare, the coming extreme cold will be enough to freeze anyone who is not prepared enough.

As for why helping others improve their living conditions can get survival points, Chen Xin didn't find it strange.

Human beings are social social animals, and helping others can actually be regarded as improving the overall social environment, and when the overall social environment is good, the living conditions of individuals will naturally be improved.

After all, in any case, in the difficult environment of the current apocalypse, it is obviously easier to survive together than alone.

It's like the few shelters that survived the apocalypse in the Frostphard Age, if everyone doesn't help each other, how can they survive in the apocalypse?

If Chen Xin didn't have a system, I'm afraid he should be very eager to exchange materials with others now, right?

After all, although everyone stocks supplies according to the same list, everyone can purchase different materials, and the shelters they build are also different.

It's like he and Mo Qingyan, he has vegetables, Mo Qingyan has wine and canned meat, and the exchange between the two of them can just complement each other to a certain extent.