Apocalyptic Zombie Breeding Manual

[Inhuman breeding + decisive killing + fighting with bare hands + the protagonist is calm] Traveling through the apocalypse, Qi Sui grabbed a zombie's head and smashed it against the wall. "Mission accomplished: kill a zombie!" "Task reward: Strength +5; unarmed combat increased by 500%." "System mission: Killing ten corpses (0/10), 11 hours, 59 minutes and 59 seconds." "Task reward: physical strength +5." Qi Sui's eyes flashed fiercely, wasn't he forcing himself to risk his life? Are there any mutant zombies? Is this just a situation? Even if you resist the beating, why are you still following me?