I recommend you two novels! Doomsday + Rebirth + Space + Female Strong + Female Lead is a Zombie novel," The Queen of Doomsday Rebirth in Space " and " The Zombie System of Doomsday ". They were about the female lead who was reborn in the apocalypse and became a zombie. She used the space and the system to evolve herself into the queen of the zombie world and led the zombies to fight against humans. As for the novels about the apocalypse, the system, the harem, and the female protagonist, the female protagonist Tang Wan in " The Leisurely Space of the Apocalypse " obtained the ability to travel through space after her rebirth. She worked hard to explore the apocalypse and continuously obtained beautiful men in the harem. I hope you like my recommendation.😗