Rebirth in a Different World: Accidentally Picked up the Industrial Mother!

(Medieval western fantasy + science fiction + harem + no system + baby start) The otaku hero Chen Hua suddenly died and found himself reborn as a baby. Until one day, he accidentally discovered an ancient ruins and accidentally activated a device. A beautiful white-haired girl who claimed to be the nanorobot "Grey Wind" appeared. At the same time, Chen Hua seemed to have the same abilities as her and met two girls one after another. After the divine disaster, their story officially begins. After that, the industrial revolution took root in this magical continent. From steam to nuclear fusion, from the Middle Ages to the period of interstellar exploration, to... Facing a world that is about to collapse...