The Reborn Heiress and the Transmigrated Princess

Shen Qingci is reborn before the tragedy begins. She unexpectedly gains access to a space and joins forces with her family to stockpile supplies and prepare a shelter in advance. Xiao Yu'er transmigrates with a space of her own, bringing a large cache of modern firearms that awaken special abilities in many people and set them on the path of surviving the apocalypse in ancient times.