Apocalypse Mechanic

A brief description of the manhua Apocalypse Mechanic:

The zombie virus spread uncontrollably. Thus began the Day of Judgment. Ye Bei was the victim of the villainy of his arrogant headman. His hand was bitten off by a zombie, after which he, like a cockroach, dragged out his miserable existence, trying to survive for 50 years. Despite the difficulties, Ye Bei becomes a mechanic and creates a time machine with his own efforts in order to return to that very day and completely rewrite his life. Seeing the callous hearts of people, he swore to himself to be worse than others, angrier and more insidious. The first thing he did, after the time jump, was to throw everyone’s favorite class leader into the zombies’ food…