Gravekeeper of the Undead

After being maliciously denied wages at a construction site, Niu Changshou gets caught up in a debt-collection effort that goes with the flow, only to find himself trapped in the collapse of a condemned building... He awakens in a cemetery in another world... A life transplanted into another body, the dead brought back to life: is he a visitor from another time and space who transmigrated to a different world, or a reborn corpse that has slept for ten thousand years?