Apocalyptic Garbage Man

[Search, fight and withdraw + no system + no invincibility + emphasis on humanity + plot flow] The fog of chaos sweeps across the world, and everything mutates and feeds on humans. The survivors retreated to the northern mountains and made a living by sneaking into the old world to pick up trash. Lin Yang is such a trash guy. In order to support his adoptive mother who was seriously injured and paralyzed and his sister who was suffering from a strange disease, he never formed a team, never took risks, and just did what he could. Until a group of "people" who could survive in the fog without gas masks found him, and his life experience and fate gradually began to surface.