Xu Yingnian was originally a diligent social worker who worked 996 every day. When he woke up, zombies broke out, food and water were scarce, and he was forced to flee.
The first three chapters explain the background, and then get to the main point. The protagonist is a bit useless in the early stage, but slowly grows up.
This article has no system, no cheats, and no special abilities.
The first three chapters are foreshadowing, and the fourth chapter begins to formally describe the doomsday world.