I can upgrade the shelter - Chapter 91 - 90: Exchange Conditions

... you have that I don’t, and things I have that you don’t. Trading and exchanging are the keys to everyone’s survival.

It’s just that Chen Xin has connections with the SWAT team, allowing him to trade for more and a greater variety of supplies, so he hasn’t needed to trade resources with other shelters.

But now, knowing that helping others improve their survival conditions can also earn survival points, Chen Xin naturally won’t miss the opportunity to communicate with other shelter ...