I Evolve in the Apocalypse

When I opened my eyes and woke up, I found that more than 40 years had passed, but my appearance had not changed. Instead, an unimaginable disaster had occurred in this world. The zombie clan is rampant, the ghost clan is eyeing them, and the guardians of China are slowly getting older. How should humans fight against the SS-level zombie clan and ghost clan, and what changes will happen to the world? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.