Black Rain 2027

In the early morning of June 6, 2027, a strange "black rain" fell across the world. The rain lasted for 72 hours. The rainwater contained unknown nanoscale particles (later called "catastrophic particles" by survivors), and all iron-containing metals underwent "entropic collapse" overnight - steel became brittle and brittle, steel bars in concrete expanded and fractured, and bridges and skyscrapers began to collapse. The industrial foundations on which modern society depends - power stations, transportation networks, communication base stations - collapsed from within within 72 hours. This is not the end of the wasteland, this is "collapse of civilization." Caught between complete destruction and absolute order, how does an ordinary person ignite the fire of civilization's counterattack?