"Rust Plague" - An outbreak of an unknown nanomechanical virus, not a traditional zombie virus. It can corrode most metals, electronic equipment and polymers (such as plastics), and infect living organisms, causing them to undergo unpredictable and horrific mutations. Civilization collapsed instantly. The world is devastated, with steel cities reduced to rusty ruins, forests replaced by strange "rust mushroom" forests, rivers polluted, and weather extremes. Survivors relied on pre-disaster remnants (non-metallic) and rudimentary post-disaster artifacts to survive. Ling Yun was originally a mechanical engineer and survival enthusiast. He was hiking in a remote mountainous area when the disaster broke out and survived by luck. In the past ten years, he has not received any news about his sister Ling Xue. But he never gave up hope. Every once in a while, he will venture down the mountain to search for supplies and traces of his sister. Please wait and see what thrilling stories will happen during this period!