Rebirth: the King of Hell Gives Me a System to Kill Zombies

I was threatened with my own life in exchange for my girlfriend's life, so I chose to sacrifice myself generously and jumped off the cliff... Burping my ass. As a result, when I woke up, I found that my soul was taken to the underworld by a bull-headed horse face. The Lord of Hell said that he could resurrect me and return to China, but only if he tested the system for him. I believed it and took his system into the rebirth pool and went to the corpse world. In the zombie world - a place exactly like the earth, a zombie virus broke out. I have to survive until I complete the main task set by the system, and then I can be reborn. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.